:root {
  color-scheme: dark;
  --ink-0: #f1f2f4;
  --ink-1: #d6d9de;
  --ink-2: #9ca2ad;
  --ink-3: #69707c;
  --ground: #0e0f12;
  --surface-0: #131519;
  --surface-1: #181b20;
  --surface-2: #21242a;
  --surface-3: #292d34;
  --line: #30343c;
  --line-strong: #4a505b;
  --paper: #eceae5;
  --paper-ink: #202226;
  --paper-muted: #6d7078;
  --learn: #aab6c6;
  --learn-deep: #657487;
  --learn-soft: #222933;
  --fresh: #789db6;
  --fresh-soft: #20313c;
  --due: #d08a58;
  --due-soft: #3a281e;
  --danger: #ce7169;
  --radius-sm: 8px;
  --radius-md: 13px;
  --radius-lg: 20px;
  --topbar: 68px;
  --content: 1240px;
  --ease: cubic-bezier(0.2, 0.72, 0.22, 1);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

/* Product surface: restrained graphite, high contrast, and one visual system. */
.account-trigger {
  display: inline-grid;
  place-items: center;
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  padding: 0;
  overflow: hidden;
  color: var(--ink-1);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  font-size: 0;
  line-height: 0;
  white-space: nowrap;
}

.account-trigger:hover {
  color: var(--ink-0);
  background: var(--surface-2);
  border-color: var(--line-strong);
}

.account-trigger svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.activity-streak svg,
.summary-streak svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.account-dialog {
  width: min(390px, calc(100vw - 30px));
  margin: auto;
  padding: 0;
  color: var(--ink-0);
  background: var(--surface-1);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.48);
}

.account-dialog::backdrop {
  background: rgba(7, 8, 10, 0.72);
  backdrop-filter: blur(5px);
}

.account-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.dialog-header-compact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.dialog-header-compact h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.025em;
}

.account-note {
  margin: 2px 0 6px;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.5;
}

.account-auth-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  color: var(--ink-2);
  font-size: 13px;
}

.account-auth-state span {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  color: #b7d8bf;
  background: #1e3026;
  border: 1px solid #35533f;
  border-radius: 50%;
  font-size: 11px;
}

.account-storage-card {
  display: grid;
  gap: 8px;
  padding: 13px;
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.account-storage-card.is-account-saved {
  background: linear-gradient(135deg, rgba(30, 48, 38, 0.72), var(--surface-0) 68%);
  border-color: #35533f;
}

.account-storage-card.needs-account-save {
  border-color: #4b5059;
}

.account-storage-card > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.account-storage-card strong,
.account-storage-card span {
  font-size: 14px;
}

.account-storage-card span {
  color: var(--ink-2);
}

.account-storage-card .account-save-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #b7d8bf;
  font-weight: 650;
}

.account-save-check {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  color: #d7f0dd;
  background: #1e3026;
  border: 1px solid #3f6a4c;
  border-radius: 50%;
  font-size: 11px;
  line-height: 1;
}

.account-save-attention {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #c7cbd2 !important;
  font-weight: 650;
}

.account-attention-dot {
  width: 8px;
  height: 8px;
  background: #9aa0aa;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(154, 160, 170, 0.12);
}

.account-storage-card p,
.settings-intro {
  margin: 0;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.5;
}

.account-signin {
  width: 100%;
}

.account-menu-row,
.settings-row {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  color: var(--ink-1);
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 14px;
}

button.account-menu-row {
  cursor: pointer;
}

button.account-menu-row:hover {
  color: var(--ink-0);
  border-color: var(--line-strong);
}

.settings-row span:last-child {
  color: var(--ink-3);
  font-size: 12px;
}

.settings-row-account-saved {
  background: rgba(30, 48, 38, 0.48);
  border-color: #35533f;
}

.settings-row-account-saved span:last-child {
  color: #b7d8bf;
  font-size: 13px;
}

.settings-row-account-attention {
  width: 100%;
  background: rgba(64, 47, 25, 0.48);
  border-color: #745b32;
  cursor: pointer;
}

.settings-section {
  display: grid;
  gap: 9px;
}

.settings-section + .settings-section {
  padding-top: 13px;
  border-top: 1px solid var(--line);
}

.settings-section h3 {
  margin: 0;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.settings-danger .button {
  width: 100%;
}

.settings-section > .button-danger {
  width: 100%;
}

.settings-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.study-home-heading {
  margin-bottom: 22px;
}

.study-home-heading h1 {
  font-size: clamp(36px, 4vw, 48px);
  font-weight: 590;
}

.activity-streak {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0;
  color: var(--ink-0);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 16px;
  font-weight: 650;
}

.activity-streak svg,
.summary-streak svg {
  color: #d98753;
}

.activity-strip {
  gap: 10px;
}

.activity-day .activity-dot {
  width: min(28px, 100%);
  border-radius: 50%;
}

.activity-day[data-level="1"] .activity-dot {
  background: #1e3026;
  border-color: #2d4937;
}

.activity-day[data-level="2"] .activity-dot {
  background: #294934;
  border-color: #3b6548;
}

.activity-day[data-level="3"] .activity-dot {
  background: #3b6849;
  border-color: #56845f;
}

.activity-day[data-level="4"] .activity-dot {
  background: #568561;
  border-color: #76a57e;
}

.library-card::before,
.deck-card::before {
  content: none;
}

.library-card,
.deck-card {
  background: #17191d;
  border-color: #343840;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
}

.status-pill,
.status-pill[data-tone="due"],
.status-pill[data-tone="learn"] {
  color: var(--ink-2);
  background: transparent;
  border-color: var(--line);
}

.mastery-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-top: 24px;
}

.mastery-row strong {
  color: var(--ink-0);
  font-size: 14px;
  font-weight: 650;
}

.mastery-row span {
  color: var(--ink-1);
  font-size: 14px;
}

.progress-track span {
  background: #b6c0ce;
}

.deck-card .progress-track {
  margin: 9px 0 13px;
}

.archive-confirmation {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  min-height: 128px;
  align-items: stretch;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 18px 20px 20px;
  background: #202329;
  border-top: 1px solid #4a505b;
  box-shadow: 0 -14px 30px rgba(0, 0, 0, 0.3);
}

.archive-confirmation > div:first-child {
  display: grid;
  gap: 4px;
}

.archive-confirmation > div:last-child {
  display: flex;
  justify-content: flex-end;
  gap: 7px;
}

.archive-confirmation strong {
  color: var(--ink-0);
  font-size: 14px;
}

.archive-confirmation span {
  color: var(--ink-1);
  font-size: 12px;
}

.term-table-wrap {
  max-height: min(480px, 56vh);
  margin-top: 22px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  scrollbar-color: var(--line-strong) transparent;
}

.term-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 14px;
}

.term-table th,
.term-table td {
  padding: 11px 13px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.term-table th {
  position: sticky;
  z-index: 1;
  top: 0;
  color: var(--ink-0);
  background: #1b1e23;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.term-table th:first-child,
.term-table td:first-child {
  width: 100%;
}

.term-table td {
  color: var(--ink-0);
  line-height: 1.45;
}

.term-table tr:last-child td {
  border-bottom: 0;
}

.session-shell {
  width: min(680px, calc(100% - 40px));
}

.study-stage {
  padding: clamp(48px, 8vh, 74px) 0 18px;
}

.study-card-stack {
  width: min(540px, calc(100vw - 44px));
  height: 338px;
}

.study-controls {
  min-height: 72px;
  margin-top: 0;
}

.chat-study-status {
  display: grid;
  justify-items: center;
  gap: 5px;
  margin-top: 10px;
  text-align: center;
}

.chat-study-status strong {
  font-size: 14px;
  font-weight: 650;
}

.chat-study-status span {
  color: var(--ink-3);
  font-size: 11px;
}

.study-takeover-notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 18px;
  padding: 14px 16px;
  color: var(--ink-0);
  background: var(--surface-1);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
}

.study-takeover-notice p {
  margin: 4px 0 0;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.4;
}

.session-shell[data-study-superseded="true"] .study-card-scene {
  opacity: 0.82;
}

.summary-streak {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.graph-toolbar {
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  min-height: 68px;
}

.graph-back {
  min-height: 36px;
  padding: 0 12px;
  color: var(--ink-1);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
}

.graph-back:hover {
  color: var(--ink-0);
  border-color: var(--line-strong);
}

.graph-title .eyebrow {
  display: none;
}

.graph-title h1 {
  margin: 0;
}

.graph-edge {
  stroke: #525965;
  stroke-width: 1.15;
}

.graph-edge.is-muted {
  opacity: 0.16;
}

.graph-edge.is-traced {
  stroke: #c5ccd5;
  stroke-width: 1.8;
}

.graph-edges marker path {
  fill: #6b7380;
}

.graph-node {
  justify-content: center;
  width: 170px;
  min-height: 58px;
  padding: 10px 21px 10px 14px;
  color: #d7dadd;
  background: #17191d;
  border: 1px solid #434851;
  border-radius: 14px;
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.14);
}

.graph-node span {
  width: 100%;
  font-size: 12px;
  font-weight: 620;
  line-height: 1.22;
  text-align: center;
}

.graph-node[data-learning="unseen"] {
  color: #a1a6ae;
  border-color: #393e46;
  border-style: dashed;
}

.graph-node[data-learning="learning"] {
  color: #e0e4e8;
  border-color: #768699;
}

.graph-node[data-learning="established"] {
  color: #f1f3f4;
  border-color: #a8b4c3;
}

.graph-node .node-recency {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 6px;
  height: 6px;
  background: #626872;
  border: 1px solid #17191d;
  border-radius: 50%;
}

.graph-node[data-freshness="due"] .node-recency { background: #c7615b; }
.graph-node[data-freshness="soon"] .node-recency { background: #c58a58; }
.graph-node[data-freshness="fresh"] .node-recency { background: #79a2ba; }

.graph-world[data-zoom="overview"] .graph-node span {
  opacity: 1;
}

.graph-node.is-muted {
  color: #8e949d;
  border-color: #343941;
  opacity: 1;
}

.graph-node.is-traced {
  color: #f0f2f3;
  border-color: #b4beca;
}

.graph-node.is-selected {
  outline: 1px solid #d7dce2;
  outline-offset: 3px;
}

.graph-node.is-pinned::after {
  top: auto;
  right: 8px;
  bottom: 7px;
  background: #a8afb8;
}

.graph-inspector {
  background: rgba(23, 25, 29, 0.97);
  border-color: #454b54;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.32);
}

.graph-legend {
  gap: 16px;
  letter-spacing: 0;
  text-transform: none;
}

.graph-legend .legend-learning i {
  background: transparent;
  border-color: #a8b4c3;
  border-radius: 3px;
}

.graph-legend .legend-recency i {
  width: 7px;
  height: 7px;
  background: #79a2ba;
  border: 0;
  border-radius: 50%;
}

.toast-region {
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  pointer-events: auto;
}

.toast-action {
  flex-shrink: 0;
  min-height: 40px;
  padding: 0 16px;
  color: #111318;
  background: var(--ink-0);
  border: 1px solid var(--ink-0);
  border-radius: 7px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

@media (max-width: 980px) {
  .graph-toolbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    min-height: 68px;
  }

  .graph-search {
    top: 84px;
  }
}

@media (max-width: 720px) {
  body[data-route="graph"] .graph-page {
    position: fixed;
    inset: 0;
    height: 100dvh;
    min-height: 0;
    max-height: 100dvh;
    grid-template-rows: auto auto minmax(0, 1fr);
  }

  .graph-toolbar {
    grid-template-columns: auto minmax(0, 1fr);
    min-height: 106px;
    align-content: center;
  }

  .graph-title h1 {
    font-size: 14px;
  }

  .graph-zoom {
    grid-column: 1 / -1;
    justify-self: stretch;
  }

  .graph-zoom button {
    flex: 1;
  }

  .graph-search {
    top: 120px;
  }

  .archive-confirmation {
    align-items: stretch;
    flex-direction: column;
  }
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--ground);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink-0);
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--ground);
  background-size: 28px 28px;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

svg {
  display: block;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: var(--paper-ink);
  background: var(--paper);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

:focus-visible {
  outline: 2px solid var(--ink-0);
  outline-offset: 3px;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  z-index: 50;
  top: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  width: 100%;
  max-width: 100%;
  height: var(--topbar);
  padding: 0 28px;
  background: rgba(14, 15, 18, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  max-width: 100%;
  width: fit-content;
  gap: 11px;
  font-weight: 670;
  letter-spacing: -0.02em;
}

.brand-copy {
  display: block;
  line-height: 1;
}

.brand-copy strong {
  font-size: 20px;
  font-weight: 670;
}

.brand-mark {
  display: block;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  background: url("/meshful-logo-grid-512.png") center / contain no-repeat;
  border-radius: 8px;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-self: center;
  min-width: 0;
  max-width: 100%;
  gap: 5px;
  padding: 4px;
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 11px;
}

.primary-nav a {
  padding: 8px 14px;
  white-space: nowrap;
  color: var(--ink-2);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  transition: color 140ms ease, background 140ms ease;
}

.primary-nav a:hover {
  color: var(--ink-0);
}

.primary-nav a[aria-current="page"] {
  color: var(--ink-0);
  background: var(--surface-2);
}

.topbar-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  min-width: 0;
  gap: 12px;
}

.demo-mode-status {
  display: inline-flex;
  align-items: center;
  min-height: 0;
  max-width: 100%;
  padding: 0;
  background: transparent;
  border: 0;
  gap: 0;
}

.demo-mode-status[hidden] {
  display: none;
}

.demo-mode-exit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  color: var(--paper-ink);
  background: var(--paper);
  border: 1px solid var(--paper);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 670;
  white-space: nowrap;
}

.demo-mode-exit:hover {
  color: #15171b;
  background: #fff;
  border-color: #fff;
}

.graph-title-line,
.session-title-line {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 10px;
}

.graph-title-line {
  justify-content: center;
}

.session-title-line .session-deck-name,
.graph-title-line h1 {
  min-width: 0;
}

.demo-mode-route-status {
  flex: 0 0 auto;
  min-height: 0;
  padding: 0;
  gap: 0;
}

.demo-mode-route-status .demo-mode-exit {
  min-height: 32px;
  padding-inline: 10px;
  font-size: 12px;
}

.sync-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
}

.sync-dot {
  width: 6px;
  height: 6px;
  background: var(--fresh);
  border-radius: 50%;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--ink-1);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 9px;
  cursor: pointer;
}

.icon-button:hover {
  color: var(--ink-0);
  background: var(--surface-2);
  border-color: var(--line-strong);
}

.icon-button svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.5;
}

.main {
  min-height: calc(100vh - var(--topbar));
}

.page {
  width: min(var(--content), calc(100% - 48px));
  margin: 0 auto;
  padding: 52px 0 80px;
}

.page-compact {
  width: min(1040px, calc(100% - 48px));
}

.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 30px;
}

.page-heading h1,
.study-home-heading h1 {
  max-width: 780px;
  margin: 6px 0 0;
  font-size: clamp(34px, 4.2vw, 56px);
  font-weight: 560;
  letter-spacing: -0.052em;
  line-height: 1.02;
}

.page-heading p:not(.eyebrow) {
  max-width: 560px;
  margin: 10px 0 0;
  color: var(--ink-2);
  line-height: 1.55;
}

.page-heading-simple {
  align-items: center;
  margin-bottom: 22px;
}

.page-heading-simple h1 {
  margin: 0;
  font-size: clamp(34px, 4vw, 46px);
}

.eyebrow {
  margin: 0;
  color: var(--ink-2);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.quiet {
  color: var(--ink-2);
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin: 42px 0 16px;
}

.section-heading h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 620;
  letter-spacing: -0.02em;
}

.section-heading p,
.section-heading a {
  margin: 0;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 600;
}

.section-heading a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 6px;
  color: var(--ink-1);
  font-size: 15px;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  gap: 8px;
  color: var(--ink-0);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  font-weight: 650;
  font-size: 13px;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.button:hover:not(:disabled) {
  background: var(--surface-3);
  border-color: #646b77;
}

.button:active:not(:disabled) {
  transform: translateY(1px);
}

.button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.button-primary {
  color: var(--paper-ink);
  background: var(--paper);
  border-color: var(--paper);
}

.button-primary:hover:not(:disabled) {
  background: #fffef6;
  border-color: #fffef6;
}

.button-quiet {
  color: var(--ink-1);
  background: transparent;
  border-color: var(--line);
}

.button-danger {
  color: #f0c4be;
  background: #2b1e1b;
  border-color: #5b3530;
}

.button-sm {
  min-height: 34px;
  padding: 0 12px;
  border-radius: 8px;
  font-size: 12px;
}

.page-heading-simple .my-decks-library-button {
  min-height: 46px;
  padding: 0 20px;
  font-size: 14px;
}

.button svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.6;
}

.pill,
.status-pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 24px;
  padding: 0 8px;
  color: var(--ink-2);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-pill[data-tone="due"] {
  color: #e4ad88;
  background: var(--due-soft);
  border-color: #60402f;
}

.status-pill[data-tone="learn"] {
  color: #bad4e5;
  background: var(--fresh-soft);
  border-color: #3c5667;
}

.study-home-heading {
  margin-bottom: 24px;
}

.study-home-heading h1 {
  margin: 0;
  font-size: clamp(34px, 4vw, 48px);
}

.study-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(260px, 0.75fr);
  min-height: 355px;
  overflow: hidden;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.study-hero-main {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 355px;
  padding: 36px;
  border-right: 1px solid var(--line);
}

.study-hero-main::after {
  content: none;
}

.due-number {
  display: flex;
  align-items: end;
  gap: 12px;
  margin-top: 18px;
}

.due-number strong {
  font-size: clamp(64px, 9vw, 112px);
  font-weight: 500;
  letter-spacing: -0.08em;
  line-height: 0.84;
}

.due-number span {
  padding-bottom: 10px;
  color: var(--ink-2);
  font-size: 15px;
}

.study-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 420px;
}

.study-hero-copy h2 {
  margin: 0 0 7px;
  font-size: clamp(25px, 3vw, 32px);
  font-weight: 620;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.study-hero-copy p {
  margin: 0 0 18px;
  color: var(--ink-2);
  font-size: 13px;
}

.button.study-hero-action {
  display: inline-flex;
  min-width: 190px;
  min-height: 50px;
  padding: 0 22px;
  gap: 10px;
  font-size: 16px;
}

.button.study-hero-action svg {
  width: 18px;
  height: 18px;
}

.study-hero-side {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 24px;
  padding: 28px;
  background: var(--surface-0);
}

.activity-module {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.activity-unavailable {
  margin: 10px 0 0;
  color: var(--ink-2);
  font-size: 11px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.activity-history-panel {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-0);
}

.activity-history-panel .activity-module { padding-bottom: 0; border-bottom: 0; }

.activity-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.activity-heading div > span {
  display: block;
  margin-bottom: 0;
  color: var(--ink-1);
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.activity-heading strong {
  display: block;
  font-size: 17px;
  font-weight: 610;
  letter-spacing: -0.025em;
}

.activity-streak {
  padding: 5px 8px;
  color: #b9dfc4;
  background: var(--learn-soft);
  border: 1px solid #34523e;
  border-radius: 99px;
  font-size: 10px;
  font-weight: 650;
  white-space: nowrap;
}

.hero-metrics {
  display: block;
}

.hero-metric {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  min-width: 0;
}

.hero-metric span {
  margin-bottom: 0;
  color: var(--ink-1);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.hero-metric strong {
  font-size: 23px;
  font-weight: 570;
  letter-spacing: -0.035em;
}

.activity-strip {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-top: 22px;
}

.activity-day {
  display: grid;
  justify-items: center;
  gap: 8px;
  text-align: center;
}

.activity-day .activity-dot {
  width: min(32px, 100%);
  aspect-ratio: 1;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 50%;
}

.activity-day[data-level="1"] .activity-dot {
  background: #203528;
  border-color: #31513d;
}

.activity-day[data-level="2"] .activity-dot {
  background: #2b5138;
  border-color: #3f704f;
}

.activity-day[data-level="3"] .activity-dot {
  background: #3d714e;
  border-color: #579569;
}

.activity-day[data-level="4"] .activity-dot {
  background: #5b9b6d;
  border-color: #7bbb8c;
}

.activity-day span:last-child {
  color: var(--ink-3);
  font-size: 11px;
  text-transform: uppercase;
}

.deck-queue {
  display: grid;
  gap: 9px;
}

.queue-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 18px;
  min-height: 72px;
  padding: 12px 14px 12px 18px;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.queue-row:hover {
  border-color: var(--line-strong);
}

.queue-row.is-mastered {
  position: relative;
  border-width: 2px;
  border-color: #c6a65b;
  box-shadow: inset 0 0 0 1px rgba(198, 166, 91, 0.12);
}

.queue-row.is-mastered:hover,
.queue-row.is-mastered:focus-within {
  border-color: #d8bd77;
}

@property --mastery-border-angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

.queue-row.is-mastered::after,
.deck-card.is-mastered::after {
  position: absolute;
  z-index: 2;
  inset: -2px;
  padding: 3px;
  border-radius: inherit;
  background: conic-gradient(
    from var(--mastery-border-angle),
    transparent 0deg 306deg,
    rgba(255, 239, 173, 0.18) 315deg,
    #fff1a8 329deg 345deg,
    rgba(255, 239, 173, 0.18) 354deg,
    transparent 360deg
  );
  content: "";
  pointer-events: none;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  filter: drop-shadow(0 0 3px rgba(255, 231, 141, 0.34));
}

.queue-row.is-mastered::after {
  animation: mastered-border-travel-row 4.8s linear infinite;
}

.deck-card.is-mastered::after {
  animation: mastered-border-travel-card 5.8s linear infinite;
}

.queue-row.is-mastered:hover::after,
.queue-row.is-mastered:focus-within::after,
.deck-card.is-mastered:hover::after,
.deck-card.is-mastered:focus-within::after {
  filter: drop-shadow(0 0 4px rgba(255, 231, 141, 0.46)) brightness(1.08);
}

.queue-row.is-mastered:focus-within,
.deck-card.is-mastered:focus-within {
  outline: 2px solid rgba(255, 231, 141, 0.54);
  outline-offset: 2px;
}

@keyframes mastered-border-travel-row {
  0% { --mastery-border-angle: 0deg; }
  24% { --mastery-border-angle: 88deg; }
  26% { --mastery-border-angle: 92deg; }
  74% { --mastery-border-angle: 268deg; }
  76% { --mastery-border-angle: 272deg; }
  100% { --mastery-border-angle: 360deg; }
}

@keyframes mastered-border-travel-card {
  0% { --mastery-border-angle: 0deg; }
  14% { --mastery-border-angle: 48deg; }
  37% { --mastery-border-angle: 132deg; }
  63% { --mastery-border-angle: 228deg; }
  86% { --mastery-border-angle: 312deg; }
  100% { --mastery-border-angle: 360deg; }
}

.queue-row h3 {
  overflow: hidden;
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 620;
  letter-spacing: -0.015em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.queue-row p {
  margin: 0;
  color: var(--ink-2);
  font-size: 12px;
}

.queue-due {
  display: inline-flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: 6px;
  min-width: 72px;
  white-space: nowrap;
}

.queue-due strong,
.queue-due span {
  display: inline;
}

.queue-due strong {
  font-size: 17px;
}

.queue-due span {
  color: var(--ink-1);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.search-field {
  position: relative;
  flex: 1 1 260px;
}

.search-field svg {
  position: absolute;
  top: 50%;
  left: 13px;
  width: 16px;
  fill: none;
  stroke: var(--ink-3);
  stroke-linecap: round;
  stroke-width: 1.5;
  transform: translateY(-50%);
  pointer-events: none;
}

.search-field input,
.select-field {
  width: 100%;
  height: 42px;
  color: var(--ink-0);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 9px;
}

.search-field input {
  padding: 0 14px 0 39px;
}

.search-field input::placeholder {
  color: var(--ink-3);
}

.search-field input:focus,
.select-field:focus {
  border-color: var(--line-strong);
  outline: 2px solid rgba(242, 241, 233, 0.12);
}

.select-field {
  width: auto;
  min-width: 158px;
  padding: 0 34px 0 12px;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.filter-pills[aria-label="Library subjects"] {
  margin-bottom: 22px;
}

.filter-pill {
  min-height: 36px;
  padding: 0 12px;
  color: var(--ink-2);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 99px;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}

.filter-pill:hover,
.filter-pill[aria-pressed="true"] {
  color: var(--ink-0);
  background: var(--surface-2);
  border-color: var(--line-strong);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.library-card,
.deck-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 285px;
  padding: 21px;
  overflow: hidden;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 150ms ease, transform 150ms var(--ease);
}

.library-card:hover,
.deck-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.library-card::before,
.deck-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  content: "";
  background: var(--subject-accent, var(--learn));
  opacity: 0.85;
}

.subject-mathematics { --subject-accent: #8797c8; }
.subject-physics { --subject-accent: #7da4c1; }
.subject-economics { --subject-accent: #c5a36e; }
.subject-chemistry { --subject-accent: #a68cb9; }
.subject-biology { --subject-accent: #79a4b7; }
.subject-medicine { --subject-accent: #c8887f; }
.subject-law { --subject-accent: #b7a28e; }

.card-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  min-height: 24px;
}

.card-topline > span:first-child {
  color: var(--ink-2);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.library-card h2,
.deck-card h2 {
  margin: 22px 0 9px;
  font-size: 22px;
  font-weight: 590;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.library-card h2 {
  margin-top: 10px;
}

.library-card > p,
.deck-card > p {
  margin: 0;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.5;
}

.card-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 13px;
  margin: 18px 0;
  color: var(--ink-1);
  font-size: 14px;
}

.card-facts span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-facts i {
  width: 4px;
  height: 4px;
  background: var(--ink-3);
  border-radius: 50%;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
}

.card-actions .button:first-child {
  flex: 1;
}

.deck-card .card-actions .button {
  color: var(--ink-0);
  background: var(--surface-2);
  border-color: var(--line-strong);
  opacity: 1;
}

.deck-card .card-actions .button.button-primary {
  color: var(--paper-ink);
  background: var(--paper);
  border-color: var(--paper);
}

.deck-card .card-actions .button.button-danger {
  color: #f0c4be;
  background: #2b1e1b;
  border-color: #713d3a;
}

.archive-confirmation .archive-cancel-button {
  color: var(--ink-0);
  background: #15171c;
  border-color: #68707d;
}

.archive-confirmation .archive-cancel-button:hover:not(:disabled) {
  background: #21242b;
  border-color: #8a93a0;
}

.archive-confirmation .archive-confirm-button {
  color: var(--ink-0);
  background: #343943;
  border-color: #68707d;
}

.archive-confirmation .archive-confirm-button:hover:not(:disabled) {
  background: #414752;
  border-color: #8a93a0;
}

.archive-confirmation.delete-confirmation {
  min-height: 0;
  align-items: center;
  flex-direction: row;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 14px;
  background: #2b1919;
  border-top-color: #713d3a;
}

.archive-confirmation.delete-confirmation > div:first-child {
  flex: 1;
  min-width: 0;
}

.archive-confirmation.delete-confirmation > div:last-child {
  flex: 0 0 auto;
}

.delete-confirmation strong {
  color: #f1d8d5;
}

.delete-confirmation span {
  max-width: 34rem;
  color: #d0aaa5;
  font-size: 12px;
  line-height: 1.35;
}

@media (max-width: 520px) {
  .archive-confirmation.delete-confirmation {
    align-items: stretch;
    flex-direction: column;
    padding: 10px 12px;
  }
}

.button-added {
  color: var(--ink-2);
  background: var(--surface-1);
  border-color: var(--line);
}

.progress-track {
  width: 100%;
  height: 4px;
  margin: 22px 0 9px;
  overflow: hidden;
  background: var(--surface-3);
  border-radius: 99px;
}

.progress-track span {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  background: var(--learn);
  border-radius: inherit;
}

.deck-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 18px 0;
}

.deck-provenance {
  min-height: 18px;
}

.deck-stat {
  padding: 10px 8px;
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.deck-stat strong,
.deck-stat span {
  display: block;
}

.deck-stat strong {
  font-size: 14px;
}

.deck-stat span {
  margin-top: 3px;
  color: var(--ink-3);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.empty-state,
.error-state {
  display: grid;
  place-items: center;
  min-height: 440px;
  padding: 48px;
  text-align: center;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.empty-state-inner {
  max-width: 440px;
}

.empty-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.empty-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 15px;
}

.empty-icon svg {
  width: 25px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.4;
}

.empty-state h2,
.error-state h2 {
  margin: 0 0 9px;
  font-size: 23px;
  font-weight: 590;
  letter-spacing: -0.03em;
}

.empty-state p,
.error-state p {
  margin: 0 0 22px;
  color: var(--ink-2);
  line-height: 1.55;
}

[data-empty-study-home] .empty-state {
  min-height: min(440px, 52vh);
}

[data-empty-study-home] .empty-icon {
  width: 68px;
  height: 68px;
  border-radius: 18px;
}

[data-empty-study-home] .empty-icon svg {
  width: 32px;
}

[data-study-availability-deck] .empty-state {
  min-height: 0;
  padding: 28px 20px;
  overflow-wrap: anywhere;
}

[data-study-availability-deck] .empty-state-inner {
  width: 100%;
  min-width: 0;
  max-width: 560px;
}

[data-study-availability-deck] .card-actions,
.session-complete .card-actions {
  flex-wrap: wrap;
  justify-content: center;
  row-gap: 10px;
}

[data-study-availability-deck] .button {
  max-width: 100%;
  white-space: normal;
}

[data-study-availability-deck] .card-actions .button {
  flex: 1 1 180px;
}

.study-prerequisites {
  margin: 20px 0;
  padding: 20px;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow-wrap: anywhere;
  font-size: 14px;
  line-height: 1.5;
}

.study-prerequisites h2 {
  margin: 0 0 12px;
  font-size: 17px;
}

.study-prerequisites ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.study-prerequisites li + li {
  margin-top: 12px;
}

.study-prerequisites p {
  margin: 4px 0 8px;
}

.deck-card > .mastery-row {
  margin-top: auto;
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 6px 12px;
}

.deck-card .card-actions {
  margin-top: 0;
}

.session-shell {
  display: flex;
  flex-direction: column;
  width: min(760px, calc(100% - 40px));
  min-height: calc(100vh - var(--topbar));
  margin: 0 auto;
  padding: 22px 0 40px;
}

.session-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
}

.session-deck-name {
  overflow: hidden;
  color: var(--ink-1);
  font-size: 13px;
  font-weight: 620;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-progress {
  min-width: 130px;
  text-align: center;
}

.session-progress strong {
  display: block;
  margin-bottom: 7px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.session-progress .progress-track {
  height: 3px;
  margin: 0;
}

.session-exit {
  justify-self: end;
}

.study-stage {
  display: grid;
  place-items: center;
  flex: none;
  min-height: 0;
  padding: clamp(52px, 9vh, 84px) 0 20px;
}

.study-card-stack {
  position: relative;
  width: min(560px, calc(100vw - 44px));
  height: 350px;
  perspective: 1400px;
}

.stack-card {
  position: absolute;
  inset: 0;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 22px;
}

.stack-card:nth-child(1) {
  transform: translate(14px, 14px) scale(0.965);
  opacity: 0.45;
}

.stack-card:nth-child(2) {
  transform: translate(7px, 7px) scale(0.982);
  opacity: 0.72;
}

.study-card-scene {
  position: absolute;
  inset: 0;
  transition: transform 230ms var(--ease), opacity 180ms ease;
  transform-style: preserve-3d;
}

.study-card-scene.is-flipped {
  transform: rotateY(180deg);
}

.study-card-scene.is-departing {
  opacity: 0;
  transform: translateX(-95px) rotate(-2deg);
}

.study-card-scene.is-flipped.is-departing {
  transform: translateX(-95px) rotateY(180deg) rotateZ(-2deg);
}

.study-card-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(28px, 5vw, 48px);
  overflow: hidden;
  color: var(--paper-ink);
  background: var(--paper);
  border: 1px solid #fbfaf3;
  border-radius: 22px;
  backface-visibility: hidden;
}

.study-card-back {
  transform: rotateY(180deg);
}

.study-term {
  display: grid;
  place-items: center;
  flex: 1;
  margin: 0;
  font-family: ui-serif, Georgia, serif;
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 520;
  letter-spacing: -0.045em;
  line-height: 1.06;
  text-align: center;
  text-wrap: balance;
}

.study-definition {
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: 14px 5px 14px 0;
  overflow-x: hidden;
  overflow-y: auto;
  font-family: ui-serif, Georgia, serif;
  font-size: clamp(18px, 2.35vw, 27px);
  line-height: 1.42;
  overflow-wrap: anywhere;
  scrollbar-color: rgba(31, 32, 35, 0.42) transparent;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  text-wrap: pretty;
}

.study-definition::-webkit-scrollbar,
.definition-math-display::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

.study-definition::-webkit-scrollbar-thumb,
.definition-math-display::-webkit-scrollbar-thumb {
  background: rgba(31, 32, 35, 0.36);
  border-radius: 999px;
}

.study-definition p {
  margin: 0 0 0.75em;
}

.study-definition p:last-child,
.study-definition ul:last-child,
.study-definition ol:last-child,
.study-definition pre:last-child,
.study-definition .definition-math-display:last-child {
  margin-bottom: 0;
}

.study-definition ul,
.study-definition ol {
  margin: 0 0 0.8em;
  padding-inline-start: 1.35em;
}

.study-definition li + li {
  margin-top: 0.3em;
}

.study-definition a {
  color: #334f75;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.12em;
  overflow-wrap: anywhere;
}

.study-definition code {
  padding: 0.12em 0.28em;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78em;
  background: rgba(31, 32, 35, 0.07);
  border-radius: 4px;
}

.study-definition pre {
  max-width: 100%;
  margin: 0 0 0.8em;
  padding: 0.7em;
  overflow: auto;
  background: rgba(31, 32, 35, 0.07);
  border-radius: 7px;
}

.study-definition pre code {
  padding: 0;
  background: transparent;
}

.definition-math-inline {
  display: inline-block;
  max-width: 100%;
  vertical-align: -0.1em;
}

.definition-math-display {
  max-width: 100%;
  margin: 0.7em 0 0.9em;
  padding: 0.15em 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.definition-math-display .katex-display {
  margin: 0.25em 0;
}

.definition-math-fallback {
  color: #744337;
}

.definition-math-fallback code {
  display: inline-block;
  max-width: 100%;
}

.study-card-foot {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  min-height: 26px;
  color: var(--paper-muted);
  font-family: ui-serif, Georgia, serif;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 620;
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.study-controls {
  display: grid;
  justify-items: center;
  min-height: 96px;
  margin-top: 4px;
}

.reveal-hint {
  margin-top: 12px;
  color: var(--ink-3);
  font-size: 11px;
}

kbd {
  display: inline-flex;
  min-width: 20px;
  min-height: 20px;
  justify-content: center;
  align-items: center;
  padding: 0 5px;
  color: var(--ink-2);
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-bottom-color: var(--line-strong);
  border-radius: 5px;
  font-family: inherit;
  font-size: 9px;
}

.rating-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 10px;
  width: min(620px, 100%);
}

.rating-button {
  display: grid;
  place-items: center;
  min-height: 76px;
  padding: 14px;
  border: 1px solid;
  border-radius: 11px;
  cursor: pointer;
  transition: filter 140ms ease, transform 140ms var(--ease);
}

.rating-button:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.rating-button strong {
  font-size: 14px;
  font-weight: 720;
}

.rating-button[data-rating="again"] {
  color: #ffd8d4;
  background: #44221f;
  border-color: #a95750;
}

.rating-button[data-rating="hard"] {
  color: #ffe1c2;
  background: #432d1d;
  border-color: #b8753a;
}

.rating-button[data-rating="good"] {
  color: #e1f4e6;
  background: #273c2f;
  border-color: #659878;
}

.rating-button[data-rating="easy"] {
  color: #e3f8e9;
  background: #295039;
  border-color: #67a97a;
}

.agent-state-note {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 32px;
  padding: 0 11px;
  color: var(--ink-2);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 99px;
  font-size: 11px;
}

.agent-state-note i {
  width: 6px;
  height: 6px;
  background: var(--learn);
  border-radius: 50%;
}

.session-complete {
  display: grid;
  place-items: center;
  flex: 1;
  text-align: center;
}

.session-complete h1 {
  margin: 10px 0;
  font-size: clamp(38px, 6vw, 64px);
  font-weight: 540;
  letter-spacing: -0.06em;
}

.session-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  width: min(480px, 100%);
  margin: 28px 0;
}

.session-summary > div {
  padding: 16px;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.session-summary strong,
.session-summary span {
  display: block;
}

.session-summary strong {
  font-size: 22px;
}

.session-summary span {
  margin-top: 5px;
  color: var(--ink-3);
  font-size: 9px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.graph-page {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: calc(100dvh - var(--topbar));
  overflow: hidden;
  background: var(--ground);
}

.graph-toolbar {
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr);
  align-items: center;
  gap: 16px;
  min-height: 68px;
  padding: 10px 20px;
  background: rgba(14, 15, 18, 0.96);
  border-bottom: 1px solid var(--line);
}

.graph-title {
  min-width: 0;
}

.graph-title h1 {
  overflow: hidden;
  margin: 2px 0 0;
  font-size: 17px;
  font-weight: 620;
  letter-spacing: -0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.graph-modes,
.graph-zoom {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 9px;
}

.graph-modes button,
.graph-zoom button {
  min-height: 31px;
  padding: 0 10px;
  color: var(--ink-3);
  background: transparent;
  border: 0;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 650;
  cursor: pointer;
}

.graph-zoom button svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

body[data-route="session"] .topbar,
body[data-route="session"] .mobile-nav,
body[data-route="graph"] .topbar,
body[data-route="graph"] .mobile-nav {
  display: none;
}

body[data-route="session"],
body[data-route="graph"] {
  padding-bottom: 0;
}

body[data-route="session"] .main,
body[data-route="graph"] .main,
body[data-route="session"] .session-shell {
  min-height: 100vh;
}

body[data-route="graph"] .graph-page {
  position: fixed;
  inset: 0;
  height: 100dvh;
}

body[data-route="graph"] { overflow: hidden; }
body[data-route="graph"] .main { min-height: 100dvh; }

.graph-modes button:hover,
.graph-zoom button:hover,
.graph-modes button[aria-pressed="true"] {
  color: var(--ink-0);
  background: var(--surface-2);
}

.graph-zoom {
  justify-self: end;
}

.graph-zoom button {
  min-width: 31px;
  padding: 0 8px;
  font-size: 13px;
}

.graph-search {
  position: absolute;
  z-index: 16;
  top: 84px;
  left: 20px;
  width: min(290px, calc(100vw - 40px));
}

.graph-search .search-field input {
  height: 38px;
  background: rgba(19, 21, 25, 0.95);
}

.graph-workspace {
  position: relative;
  min-height: 0;
  overflow: hidden;
  touch-action: none;
  cursor: grab;
}

.graph-workspace.is-panning {
  cursor: grabbing;
}

.graph-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.graph-world {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  transform-origin: 0 0;
  will-change: transform;
}

.graph-edges,
.graph-nodes {
  position: absolute;
  top: 0;
  left: 0;
  overflow: visible;
}

.graph-edges {
  transition: opacity 120ms ease;
}

.graph-workspace.is-dragging-node .graph-edges {
  opacity: 0.18;
}

.graph-edge {
  fill: none;
  stroke: #414650;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.25;
  vector-effect: non-scaling-stroke;
}

.graph-edge.is-muted {
  opacity: 0.15;
}

.graph-edge.is-traced {
  stroke: #adb4bf;
  stroke-width: 1.7;
}

.graph-edge.is-pulsing {
  stroke: var(--learn);
  stroke-dasharray: 24 160;
  stroke-dashoffset: 184;
  stroke-width: 2;
  animation: memory-flow 820ms var(--ease) 1;
}

@keyframes memory-flow {
  from { stroke-dashoffset: 184; opacity: 0; }
  18% { opacity: 1; }
  to { stroke-dashoffset: 0; opacity: 0; }
}

.graph-node {
  position: absolute;
  display: flex;
  align-items: center;
  width: 176px;
  min-height: 52px;
  padding: 9px 12px;
  color: #dfe1e5;
  background: #1b1e23;
  border: 1px solid #464c56;
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.graph-node:hover {
  border-color: #7b828e;
}

.graph-node span {
  display: -webkit-box;
  overflow: hidden;
  font-size: 13px;
  font-weight: 610;
  line-height: 1.25;
  text-align: left;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.graph-node[data-mode="learning"][data-learning="unseen"] {
  color: #8c929c;
  background: #16181c;
  border-style: dashed;
  border-color: #373b43;
}

.graph-node[data-mode="learning"][data-learning="learning"] {
  color: #d7e2db;
  background: #1e2b25;
  border-color: #456050;
}

.graph-node[data-mode="learning"][data-learning="established"] {
  color: #edf1ec;
  background: #2b4035;
  border-color: #65806f;
}

.graph-node[data-mode="freshness"][data-freshness="new"] {
  color: #9ba0aa;
  background: #17191d;
  border-style: dashed;
  border-color: #3f444d;
}

.graph-node[data-mode="freshness"][data-freshness="fresh"] {
  color: #e2e9eb;
  background: #202a2e;
  border-color: #4d6875;
}

.graph-node[data-mode="freshness"][data-freshness="soon"] {
  color: #ebe0d5;
  background: #2d2923;
  border-color: #9b765b;
}

.graph-node[data-mode="freshness"][data-freshness="due"] {
  color: #f0ddd3;
  background: #33231e;
  border-color: var(--due);
}

.graph-world[data-zoom="overview"] .graph-node span {
  opacity: 0;
}

.graph-node.is-muted {
  opacity: 0.56;
}

.graph-node.is-traced {
  border-color: #bac0ca;
}

.graph-node.is-selected {
  outline: 1px solid var(--ink-0);
  outline-offset: 3px;
}

.graph-node.is-pinned::after {
  position: absolute;
  top: 5px;
  right: 6px;
  width: 4px;
  height: 4px;
  content: "";
  background: var(--ink-1);
  border-radius: 50%;
}

.graph-inspector {
  position: absolute;
  z-index: 18;
  right: 20px;
  bottom: 20px;
  width: min(320px, calc(100vw - 40px));
  padding: 19px;
  background: rgba(24, 27, 32, 0.97);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
}

.graph-inspector h2 {
  margin: 7px 0 15px;
  font-family: ui-serif, Georgia, serif;
  font-size: 23px;
  font-weight: 520;
  letter-spacing: -0.025em;
}

.inspector-state {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 7px;
  margin-bottom: 15px;
}

.inspector-state > div {
  padding: 9px;
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.inspector-state strong,
.inspector-state span {
  display: block;
}

.inspector-state strong {
  font-size: 12px;
}

.inspector-state span {
  margin-top: 4px;
  color: var(--ink-3);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.inspector-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.inspector-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
  font-size: 11px;
}

.inspector-list li:last-child {
  border-bottom: 0;
}

.graph-legend {
  position: absolute;
  z-index: 15;
  left: 20px;
  bottom: 20px;
  display: flex;
  gap: 13px;
  padding: 9px 11px;
  color: var(--ink-3);
  background: rgba(19, 21, 25, 0.9);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.graph-legend span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.graph-legend i {
  width: 8px;
  height: 8px;
  background: var(--surface-3);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
}

.graph-legend i.new,
.graph-legend i.not-introduced {
  background: #17191d;
  border-style: dashed;
  border-color: #3f444d;
}

.graph-legend i.learning { background: #1e2b25; border-color: #456050; }
.graph-legend i.established { background: #2b4035; border-color: #65806f; }
.graph-legend i.due { background: #33231e; border-color: var(--due); }
.graph-legend i.soon { background: #2d2923; border-color: #9b765b; }
.graph-legend i.fresh { background: #202a2e; border-color: #4d6875; }

.sheet-dialog,
.command-dialog {
  margin: auto;
  padding: 0;
  color: var(--ink-0);
  background: var(--surface-1);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.sheet-dialog::backdrop,
.command-dialog::backdrop {
  background: rgba(7, 8, 10, 0.74);
  backdrop-filter: blur(5px);
}

.sheet-dialog {
  width: min(720px, calc(100vw - 30px));
  max-height: min(820px, calc(100vh - 30px));
  overflow: hidden;
}

.deck-dialog-inner {
  display: flex;
  flex-direction: column;
  max-height: min(818px, calc(100vh - 32px));
  padding: 26px 28px 22px;
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 18px;
}

.dialog-header h2 {
  margin: 7px 0 0;
  font-size: 30px;
  font-weight: 570;
  letter-spacing: -0.045em;
}

.dialog-deck-count {
  margin: 9px 0 0;
  color: var(--ink-2);
  font-size: 13px;
}

.dialog-summary {
  margin: 18px 0 7px;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.6;
}

.deck-dialog-scroll {
  min-height: 0;
  margin: 14px -8px 0 0;
  padding-right: 10px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: var(--line-strong) transparent;
}

.dialog-version {
  margin: 0 0 24px;
  color: var(--ink-3);
  font-size: 11px;
}

.term-directory {
  display: grid;
  gap: 22px;
  padding: 20px 0 24px;
  border-top: 1px solid var(--line);
}

.term-group h3 {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 10px;
  color: var(--ink-1);
  font-size: 12px;
  font-weight: 680;
  letter-spacing: 0.025em;
}

.term-group h3 span {
  color: var(--ink-3);
  font-size: 10px;
  font-weight: 600;
}

.term-group ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.term-group li {
  min-width: 0;
  padding: 9px 0;
  color: var(--ink-1);
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.35;
}

.provenance-note {
  padding: 13px;
  color: var(--ink-2);
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 11px;
  line-height: 1.5;
}

.dialog-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.sheet-dialog:has(.study-takeover-dialog) {
  width: min(520px, calc(100vw - 30px));
}

.study-takeover-dialog {
  max-height: none;
  padding: 22px 24px 20px;
}

.study-takeover-dialog .dialog-header {
  align-items: center;
}

.study-takeover-dialog .dialog-header h2 {
  margin: 0;
  font-size: clamp(24px, 3vw, 28px);
}

.study-takeover-dialog .icon-button {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  font-size: 24px;
  line-height: 1;
}

.study-takeover-dialog .deck-dialog-scroll {
  margin-top: 8px;
  padding-right: 0;
  overflow: visible;
}

.study-takeover-dialog .dialog-summary {
  margin: 0;
  font-size: 15px;
  line-height: 1.45;
}

.study-takeover-dialog .dialog-actions {
  margin-top: 16px;
  padding-top: 16px;
}

.sheet-dialog:has(.library-unarchive-dialog) {
  width: min(600px, calc(100vw - 30px));
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.34);
}

.sheet-dialog:has(.library-unarchive-dialog)::backdrop {
  background: rgba(7, 8, 10, 0.58);
  backdrop-filter: blur(8px);
}

.library-unarchive-dialog {
  max-height: none;
  padding: 22px 24px 18px;
}

.library-unarchive-dialog .dialog-header h2 {
  margin-top: 5px;
}

.library-unarchive-dialog .deck-dialog-scroll {
  margin-top: 6px;
  padding-right: 0;
  overflow: visible;
}

.library-unarchive-dialog .dialog-summary {
  margin: 10px 0 2px;
  line-height: 1.5;
}

.library-unarchive-dialog .dialog-actions {
  margin-top: 14px;
  padding-top: 14px;
}

.command-dialog {
  width: min(440px, calc(100vw - 30px));
}

.command-panel {
  display: grid;
  padding: 12px;
  gap: 5px;
}

.command-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 8px 17px;
}

.command-heading h2 {
  margin: 3px 0 0;
  font-size: 22px;
  font-weight: 590;
  letter-spacing: -0.03em;
}

.command-panel > a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 46px;
  padding: 0 12px;
  color: var(--ink-1);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
}

.command-panel > a:hover {
  color: var(--ink-0);
  background: var(--surface-2);
}

.toast-region {
  position: fixed;
  z-index: 100;
  right: auto;
  bottom: 34px;
  left: 50%;
  display: grid;
  width: min(460px, calc(100vw - 40px));
  gap: 8px;
  transform: translateX(-50%);
  pointer-events: none;
}

.toast {
  min-height: 58px;
  padding: 14px 16px;
  color: var(--ink-1);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  font-size: 14px;
  animation: toast-in 180ms var(--ease);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
}

.route-loading {
  width: min(var(--content), calc(100% - 48px));
  margin: 0 auto;
  padding: 58px 0;
}

.skeleton {
  overflow: hidden;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.skeleton::after {
  display: block;
  width: 35%;
  height: 100%;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.035), transparent);
  animation: skeleton 1.4s ease infinite;
}

.skeleton-title { width: 280px; height: 48px; }
.skeleton-card { height: 340px; margin-top: 28px; }
.skeleton-row { height: 72px; margin-top: 28px; }

@keyframes skeleton {
  from { transform: translateX(-120%); }
  to { transform: translateX(360%); }
}

.mobile-nav {
  display: none;
}

@media (max-width: 980px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-hero {
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  }

  .graph-toolbar {
    grid-template-columns: minmax(160px, 1fr) auto;
  }

  .graph-modes {
    order: 3;
    grid-column: 1 / -1;
    justify-self: center;
    margin-bottom: 6px;
  }

  .graph-toolbar {
    min-height: 104px;
  }

  .graph-search {
    top: 120px;
  }
}

@media (max-width: 760px) {
  :root {
    --topbar: 58px;
  }

  body {
    padding-bottom: calc(62px + env(safe-area-inset-bottom));
    background-size: 24px 24px;
  }

  .topbar {
    grid-template-columns: 1fr auto;
    height: var(--topbar);
    padding: 0 16px;
  }

  .topbar-actions {
    gap: 8px;
  }

  .demo-mode-status {
    min-height: 0;
    padding: 0;
    gap: 0;
  }

  .demo-mode-exit {
    min-height: 36px;
    padding-inline: 12px;
    font-size: 12px;
  }

  .primary-nav,
  .sync-state {
    display: none;
  }

  .mobile-nav {
    position: fixed;
    z-index: 50;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    height: calc(62px + env(safe-area-inset-bottom));
    padding: 5px max(12px, env(safe-area-inset-right)) calc(5px + env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    background: rgba(14, 15, 18, 0.97);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(18px);
  }

  .mobile-nav a {
    display: grid;
    place-items: center;
    align-content: center;
    gap: 3px;
    color: var(--ink-3);
    font-size: 9px;
    font-weight: 650;
  }

  .mobile-nav a[aria-current="page"] {
    color: var(--ink-0);
  }

  .mobile-nav svg {
    width: 19px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.4;
  }

  .page,
  .page-compact {
    width: min(100% - 28px, var(--content));
    padding: 32px 0 52px;
  }

  .page-heading,
  .study-home-heading {
    display: block;
  }

  .page-heading h1,
  .study-home-heading h1 {
    font-size: 38px;
  }

  .page-heading .button {
    margin-top: 20px;
  }

  .page-heading-simple {
    display: flex;
  }

  .page-heading-simple .button {
    margin-top: 0;
  }

  .empty-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .study-hero {
    display: block;
  }

  .study-hero-main {
    min-height: 330px;
    padding: 26px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .study-hero-main::after {
    right: 20px;
    bottom: 25px;
    transform: scale(0.8);
    transform-origin: bottom right;
  }

  .study-hero-side {
    display: block;
    padding: 18px;
  }

  .activity-module {
    padding-bottom: 20px;
  }

  .hero-metrics {
    margin-top: 18px;
  }

  .hero-metric {
    padding: 0;
    border-right: 0;
  }

  .hero-metric strong {
    font-size: 17px;
  }

  .queue-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 12px;
  }

  .queue-row > div:first-child {
    grid-column: 1 / -1;
  }

  .queue-due {
    justify-self: end;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .library-card,
  .deck-card {
    min-height: 255px;
  }

  .filter-bar {
    align-items: stretch;
  }

  .select-field {
    flex: 1;
  }

  .session-shell {
    width: calc(100% - 28px);
    padding-top: 14px;
  }

  .session-header {
    grid-template-columns: 1fr auto;
  }

  .session-progress {
    display: none;
  }

  .study-stage {
    min-height: 0;
    padding: 38px 0 18px;
  }

  .study-card-stack {
    height: min(350px, 52vh);
  }

  .study-card-face {
    padding: 27px;
    border-radius: 17px;
  }

  .rating-grid {
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
  }

  .rating-button {
    min-height: 68px;
  }

  .graph-page {
    height: calc(100vh - var(--topbar) - 62px);
  }

  .graph-toolbar {
    grid-template-columns: 1fr auto;
    min-height: 100px;
    padding: 8px 12px;
  }

  .graph-title .eyebrow,
  .graph-zoom button[data-action="reset-graph"] {
    display: none;
  }

  .graph-modes button {
    padding: 0 8px;
  }

  .graph-search {
    top: 112px;
    left: 12px;
    width: calc(100vw - 24px);
  }

  .graph-inspector {
    right: 12px;
    bottom: 12px;
    left: 12px;
    width: auto;
    max-height: 44vh;
    overflow: auto;
  }

  .graph-legend {
    display: none;
  }

  .deck-dialog-inner {
    padding: 20px;
  }

  .term-group ol {
    grid-template-columns: 1fr;
  }

  .toast-region {
    bottom: 76px;
  }

  .toast-action {
    min-height: 44px;
  }
}

@media (max-width: 420px) {
  body[data-demo-mode="true"] .brand-copy {
    display: none;
  }

  body[data-demo-mode="true"] .brand {
    gap: 0;
  }

  body[data-demo-mode="true"] .brand-mark {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .study-hero-main::after {
    opacity: 0.42;
  }

  .due-number strong {
    font-size: 72px;
  }

  .study-card-stack {
    height: min(340px, 50vh);
  }

  .study-term {
    font-size: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .study-card-scene.is-flipped {
    transform: none;
  }

  .study-card-scene.is-flipped .study-card-front {
    visibility: hidden;
  }

  .study-card-scene.is-flipped .study-card-back {
    visibility: visible;
    transform: none;
  }
}

/* Final product overrides intentionally sit last in the cascade. */
.activity-streak {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0;
  color: var(--ink-0);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 16px;
  font-weight: 650;
}

.activity-streak svg {
  width: 26px;
  height: 26px;
}

.activity-heading .activity-streak strong {
  font-size: 24px;
  line-height: 1;
}

.activity-heading div > span { font-size: 17px; }

.streak-basis {
  max-width: 130px;
  color: var(--ink-2);
  font-size: 10px;
  font-weight: 500;
  line-height: 1.3;
}

.activity-strip { gap: 6px; }
.activity-day {
  position: relative;
  outline: none;
}

.activity-day::after {
  position: absolute;
  bottom: calc(100% + 7px);
  left: 50%;
  z-index: 4;
  padding: 6px 8px;
  color: var(--ink-0);
  background: #111318;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.24);
  content: attr(data-activity-tooltip);
  width: max-content;
  max-width: min(220px, 72vw);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 3px);
  transition: opacity 60ms ease, transform 60ms ease;
  white-space: normal;
}

.activity-day:hover::after,
.activity-day:focus-visible::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

.activity-day:first-child::after { left: 0; transform: translateY(3px); }
.activity-day:last-child::after { right: 0; left: auto; transform: translateY(3px); }
.activity-day:first-child:hover::after,
.activity-day:first-child:focus-visible::after,
.activity-day:last-child:hover::after,
.activity-day:last-child:focus-visible::after { transform: translateY(0); }

.activity-day:focus-visible .activity-dot {
  outline: 2px solid var(--ink-0);
  outline-offset: 3px;
}

.activity-day .activity-dot { width: min(34px, 100%); border-radius: 50%; }
.activity-day span:last-child { color: var(--ink-2); font-size: 12px; }
.activity-day[data-level="1"] .activity-dot { background: #1e3026; border-color: #2d4937; }
.activity-day[data-level="2"] .activity-dot { background: #294934; border-color: #3b6548; }
.activity-day[data-level="3"] .activity-dot { background: #3b6849; border-color: #56845f; }
.activity-day[data-level="4"] .activity-dot { background: #568561; border-color: #76a57e; }
.activity-day[data-week-share] .activity-dot {
  background: hsl(138 28% var(--activity-fill-lightness));
  border-color: hsl(138 34% var(--activity-border-lightness));
  transition: background-color 140ms ease, border-color 140ms ease;
}

.library-card::before,
.deck-card::before { content: none; }

.library-card,
.deck-card {
  background: #17191d;
  border-color: #343840;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
}

.status-pill,
.status-pill[data-tone="due"],
.status-pill[data-tone="learn"] {
  color: var(--ink-2);
  background: transparent;
  border-color: var(--line);
}

.progress-track span { background: #b6c0ce; }
.deck-card .progress-track { margin: 9px 0 13px; }

.library-card { min-height: 0; }
.library-card .card-topline { min-height: 16px; }
.library-card h2 { margin: 8px 0; }
.library-card-footer { margin-top: auto; padding-top: 20px; }
.library-card-footer .card-facts { margin: 0 0 16px; }
.library-card-footer .card-actions { margin-top: 0; }
.library-card .card-actions > :last-child {
  flex: 0 0 104px;
  white-space: nowrap;
}
.library-card .card-actions .button {
  min-height: 40px;
  font-size: 14px;
}

.deck-card.is-mastered {
  position: relative;
  border-width: 2px;
  border-color: #c6a65b;
  box-shadow:
    inset 0 0 0 1px rgba(198, 166, 91, 0.16),
    0 10px 24px rgba(0, 0, 0, 0.1);
}

.deck-card.is-mastered:hover,
.deck-card.is-mastered:focus-within {
  border-color: #d8bd77;
}

.status-pill[data-tone="mastered"],
.mastery-chip {
  color: #e2ca8f;
  background: rgba(198, 166, 91, 0.08);
  border-color: #6d5930;
}

.deck-card.is-mastered .progress-track span {
  background: #c6a65b;
}

.study-title-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
}

.study-title-line.has-session-progress {
  margin-bottom: 7px;
}

.study-title-line h2 {
  margin: 0;
}

.study-active-mastery {
  color: var(--ink-1);
  font-size: 14px;
  font-weight: 600;
}

.mastery-chip {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border: 1px solid #6d5930;
  border-radius: 99px;
  font-size: 10px;
  font-weight: 700;
}

.mastery-inline {
  color: #e2ca8f;
  font-weight: 650;
}

.mastery-earned {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0 0;
  padding: 12px 15px;
  color: #e2ca8f;
  background: rgba(198, 166, 91, 0.06);
  border: 1px solid #6d5930;
  border-radius: 10px;
  text-align: left;
}

.mastery-earned > span {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid #c6a65b;
  border-radius: 50%;
  font-weight: 800;
}

.mastery-earned div {
  display: grid;
  gap: 3px;
}

.mastery-earned strong,
.mastery-earned small {
  display: block;
}

.mastery-earned small {
  color: var(--ink-2);
}

.session-shell { width: min(680px, calc(100% - 40px)); }
.study-stage { padding: clamp(48px, 8vh, 74px) 0 18px; }
.study-card-stack { width: min(540px, calc(100vw - 44px)); height: 338px; }
.study-controls { min-height: 72px; margin-top: 0; }

.graph-toolbar {
  grid-template-columns: auto minmax(0, 1fr) auto;
  min-height: 68px;
}

.graph-back {
  min-height: 36px;
  padding: 0 12px;
  color: var(--ink-1);
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
}

.graph-back:hover { color: var(--ink-0); border-color: var(--line-strong); }
.graph-title .eyebrow { display: none; }
.graph-title h1 { margin: 0; }

.graph-scope-note {
  overflow: hidden;
  margin: 4px 0 0;
  color: var(--ink-3);
  font-size: 10px;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.graph-edge { stroke: #525965; stroke-width: 1.15; }
.graph-edge.is-muted { opacity: 0.16; }
.graph-edge.is-traced { stroke: #c5ccd5; stroke-width: 1.8; }
.graph-edges marker path { fill: #6b7380; }

.graph-node {
  justify-content: center;
  width: 170px;
  min-height: 58px;
  padding: 10px 21px 10px 14px;
  color: #d7dadd;
  background: #17191d;
  border: 1px solid #434851;
  border-radius: 14px;
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.14);
}

.graph-node span {
  width: 100%;
  font-size: 12px;
  font-weight: 620;
  line-height: 1.22;
  text-align: center;
  opacity: 1;
}

.graph-world[data-zoom="overview"] .graph-node span { opacity: 1; }
.graph-node.is-muted { color: #8e949d; border-color: #343941; opacity: 1; }
.graph-node.is-traced { color: #f0f2f3; border-color: #b4beca; }
.graph-node.is-selected { outline: 1px solid #d7dce2; outline-offset: 3px; }

.library-evidence-filter {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  margin-bottom: 22px;
}

.library-evidence-filter label {
  color: var(--ink-3);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.library-evidence-filter .select-field {
  height: 36px;
  min-width: 190px;
}

.evidence-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  font-size: 10px;
}

.evidence-row span {
  color: var(--ink-3);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.evidence-row strong {
  color: var(--ink-1);
  font-size: 11px;
  font-weight: 630;
}

.evidence-row-dialog {
  margin-top: 8px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.catalog-more {
  display: flex;
  justify-content: center;
  padding: 28px 0 0;
}

.account-avatar {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.03em;
  line-height: 1;
}

.profile-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--surface-0);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.profile-avatar {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--paper-ink);
  background: var(--paper);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 750;
}

.profile-row div {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.profile-row strong,
.profile-row span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-row strong { font-size: 13px; }
.profile-row span { color: var(--ink-3); font-size: 11px; }

.graph-inspector {
  background: rgba(23, 25, 29, 0.97);
  border-color: #454b54;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.32);
  display: flex;
  flex-direction: column;
  max-height: calc(100% - 40px);
  padding: 0;
  overflow: hidden;
  cursor: auto;
}

.graph-inspector[hidden] { display: none; }

.graph-inspector-header {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 16px 0;
}

.graph-inspector-header > div { min-width: 0; }
.graph-inspector-header .eyebrow { margin: 0; }
.graph-inspector-header h2 { overflow-wrap: anywhere; }

.graph-inspector-close {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  margin-top: -4px;
  font-size: 24px;
  touch-action: manipulation;
}

.graph-inspector-body {
  min-height: 0;
  padding: 0 16px 16px;
  overflow-y: auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
}

.graph-inspector .card-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 6px;
  margin-top: 0;
}

.graph-inspector .card-actions .button {
  min-width: 0;
  min-height: 44px;
  padding: 5px 8px;
  font-size: 11px;
  line-height: 1.3;
  white-space: normal;
}

.graph-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  touch-action: manipulation;
}

.graph-back > span { font-size: 22px; line-height: 1; }

.graph-toolbar {
  padding-top: max(10px, env(safe-area-inset-top));
  padding-right: max(20px, env(safe-area-inset-right));
  padding-left: max(20px, env(safe-area-inset-left));
}

.graph-legend { gap: 16px; letter-spacing: 0; text-transform: none; }

@media (max-width: 980px) {
  .graph-toolbar { grid-template-columns: auto minmax(0, 1fr) auto; min-height: 68px; }
  .graph-search { top: 84px; }
}

@media (min-width: 721px) and (max-width: 980px) {
  .study-hero { grid-template-columns: minmax(0, 1fr) 320px; }
  .study-hero-side { padding-inline: 22px; }
}

@media (max-width: 720px) {
  .graph-toolbar {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 0;
    align-content: start;
    gap: 8px 12px;
    padding: max(8px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 8px max(12px, env(safe-area-inset-left));
  }

  .graph-title { grid-column: 1; grid-row: 1; }
  .graph-back { grid-column: 2; grid-row: 1; }
  .graph-title h1 { font-size: 14px; }
  .graph-zoom { grid-column: 1 / -1; justify-self: stretch; }
  .graph-zoom button { flex: 1; min-height: 44px; }
  .graph-search {
    position: static;
    grid-row: 2;
    width: auto;
    margin: 0 12px 10px;
  }
  .graph-workspace { grid-row: 3; }
  .graph-node { width: 170px; min-height: 58px; }
  .graph-search .search-field input { height: 44px; font-size: 16px; }
  .graph-inspector {
    bottom: max(12px, env(safe-area-inset-bottom));
    max-height: min(48dvh, calc(100% - env(safe-area-inset-bottom) - 24px));
  }

  .button,
  .icon-button,
  .filter-pill,
  .account-trigger { min-height: 44px; }
  .section-heading a { min-height: 44px; font-size: 15px; }
  .icon-button,
  .account-trigger { min-width: 44px; }
  .mobile-nav a { min-height: 44px; }
  .search-field input { font-size: 16px; }
  .archive-confirmation { align-items: stretch; flex-direction: column; }
  .settings-actions { grid-template-columns: 1fr; }
  .study-takeover-notice { align-items: flex-start; flex-direction: column; }

  .session-header {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 8px;
  }

  .session-progress {
    display: block;
    min-width: 38px;
  }

  .session-progress strong {
    display: block;
    margin-bottom: 0;
    font-size: 12px;
    white-space: nowrap;
  }

  .session-progress .progress-track { display: none; }

  .study-definition {
    padding: 10px 3px 10px 0;
    font-size: clamp(15px, 4.6vw, 19px);
    line-height: 1.38;
  }

  .study-definition ul,
  .study-definition ol {
    padding-inline-start: 1.2em;
  }

}

@media (prefers-reduced-motion: reduce) {
  .queue-row.is-mastered::after,
  .deck-card.is-mastered::after {
    --mastery-border-angle: 32deg;
    animation: none !important;
  }
}

/* Study-card successor overrides. Keep this block last and session-scoped. */
.session-shell {
  position: relative;
  padding-top: 16px;
  --study-again: #a95750;
  --study-again-soft: #f4dfdb;
  --study-hard: #b8753a;
  --study-hard-soft: #f5e6d2;
  --study-good: #4f8061;
  --study-good-soft: #dfede2;
  --study-easy: #37745d;
  --study-easy-soft: #d9eee4;
}

.session-header {
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  width: min(600px, 100%);
  margin-inline: auto;
}

.session-deck-name {
  min-width: 0;
  font-size: 17px;
  line-height: 1.35;
}

.session-progress {
  width: min(540px, calc(100vw - 44px));
  min-width: 0;
  margin: 12px auto 0;
  text-align: center;
}

.session-progress strong {
  font-size: 15px;
  line-height: 1.3;
}

.session-exit {
  min-height: 48px;
  min-width: 80px;
  padding-inline: 18px;
  font-size: 16px;
  font-weight: 680;
  touch-action: manipulation;
}

.session-progress [data-session-progress] {
  display: block;
  min-height: 0;
  margin: 0 0 7px;
  padding: 0;
  color: var(--ink-1);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.session-progress [data-session-progress]::before {
  display: none;
  content: none;
}

.session-progress [data-session-progress][data-progress-mode="due"] {
  color: var(--ink-1);
  background: transparent;
  border: 0;
}

.session-progress [data-session-progress][data-progress-mode="continuous"] {
  display: block;
  min-height: 0;
  margin-bottom: 0;
  padding: 0;
  color: var(--ink-1);
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.session-progress [data-session-progress][data-progress-mode="continuous"]::before {
  display: none;
  content: none;
}

.session-progress [data-session-progress][data-progress-mode="complete"] {
  color: var(--ink-1);
  background: transparent;
  border: 0;
}

.session-shell[data-queue-phase="due"] .session-progress .progress-track span {
  background: var(--ink-1);
}

.session-progress-continuous .progress-track span {
  width: var(--progress);
  background: linear-gradient(90deg, var(--ink-1) 0%, #d4ae68 58%, #d06760 100%);
  animation: none;
  transform: none;
}

.session-progress .progress-track {
  width: 100%;
  height: 6px;
  overflow: hidden;
  background: var(--surface-2);
  border-radius: 999px;
}

.session-progress .progress-track span {
  border-radius: inherit;
  transition: width 220ms var(--ease);
}

.session-shell[data-queue-phase="complete"] .session-progress .progress-track span {
  background: #c6a65b;
}

.study-controls {
  position: relative;
  width: min(560px, 100%);
  min-height: 48px;
  margin: 10px auto 0;
}

.study-control-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  width: min(560px, 100%);
  min-height: 44px;
  padding-inline: 50px;
}

.study-control-actions.has-study-next,
.study-control-actions.has-manual-grades {
  padding-inline: 0;
}

.study-manual-grade-action,
.study-reveal-action,
.study-skip-action,
.study-next-action {
  min-height: 44px;
  padding-inline: 15px;
  font-size: 14px;
  font-weight: 650;
  touch-action: manipulation;
}

.study-manual-grades {
  width: 100%;
  text-align: center;
  animation: study-next-action-arrive 180ms var(--ease) both;
}

.study-manual-grades > p {
  margin: 0 0 9px;
  color: var(--ink-1);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.35;
}

.study-manual-grade-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.study-manual-grade {
  display: grid;
  gap: 2px;
  min-height: 58px;
  padding: 8px 7px;
  color: var(--ink-0);
  background: var(--surface-1);
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  font: inherit;
  line-height: 1.2;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.study-manual-grade:hover {
  background: var(--surface-2);
  transform: translateY(-1px);
}

.study-manual-grade strong {
  font-size: 15px;
  font-weight: 760;
}

.study-manual-grade span {
  color: var(--ink-2);
  font-size: 12px;
}

.study-manual-grade[disabled] {
  opacity: 0.58;
  cursor: wait;
  transform: none;
}

.study-next-action {
  min-width: 112px;
  animation: study-next-action-arrive 180ms var(--ease) both;
}

.study-reveal-action {
  color: var(--ink-0);
  background: var(--surface-1);
  border-color: var(--line-strong);
}

.study-skip-action {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  max-height: 44px;
  padding: 0;
  color: #d9857f;
  background: #171314;
  border-color: rgba(208, 103, 96, 0.58);
  border-radius: 11px;
}

.study-skip-action svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.65;
}

.study-skip-action::after {
  position: absolute;
  z-index: 4;
  top: calc(100% + 8px);
  left: 50%;
  padding: 5px 8px;
  content: attr(data-tooltip);
  color: var(--ink-0);
  background: #22252b;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  font-size: 12px;
  font-weight: 650;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -3px);
  transition: opacity 120ms ease, transform 120ms ease;
  white-space: nowrap;
}

.button.study-skip-action:hover:not(:disabled),
.button.study-skip-action:focus-visible {
  color: #ed9a93;
  background: #241718;
  border-color: rgba(218, 112, 104, 0.82);
}

.study-skip-action:hover::after,
.study-skip-action:focus-visible::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

.study-help-button {
  position: absolute;
  top: 2px;
  right: 2px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--ink-1);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font: inherit;
  font-size: 15px;
  font-weight: 760;
  cursor: pointer;
  touch-action: manipulation;
  transition: color 140ms ease, background-color 140ms ease, border-color 140ms ease;
}

.study-help-button:hover {
  color: var(--ink-0);
  background: var(--surface-3);
  border-color: var(--line-strong);
}

.study-manual-grade-action:focus-visible,
.study-manual-grade:focus-visible,
.study-reveal-action:focus-visible,
.study-skip-action:focus-visible,
.study-next-action:focus-visible,
.study-help-button:focus-visible,
.session-exit:focus-visible,
[data-dismiss-study-help]:focus-visible {
  outline: 2px solid var(--ink-0);
  outline-offset: 3px;
}

.session-complete[hidden],
[data-session-completion][hidden],
.study-agent-help[hidden],
[data-study-agent-help][hidden] {
  display: none !important;
}

[data-reveal-answer][disabled],
[data-reveal-answer][aria-disabled="true"],
[data-skip-card][disabled],
[data-skip-card][aria-disabled="true"] {
  color: var(--ink-3);
  opacity: 0.62;
  cursor: not-allowed;
  touch-action: none;
}

.study-nonanswer-warning {
  position: static;
  width: min(360px, calc(100% - 24px));
  margin: 10px auto 0;
  padding: 12px 14px;
  color: var(--ink-0);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
  animation: study-warning-arrive 160ms var(--ease) both;
}

.study-nonanswer-warning::backdrop {
  display: none;
  background: transparent;
  backdrop-filter: none;
}

.study-nonanswer-warning-copy strong {
  display: block;
  font-size: 14px;
  line-height: 1.35;
}

.study-nonanswer-warning-copy p,
.study-nonanswer-warning-copy span {
  display: block;
  margin: 3px 0 0;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.4;
}

.study-nonanswer-warning-copy span {
  font-size: 12px;
}

.study-nonanswer-warning-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 10px;
}

.study-nonanswer-warning-actions .button {
  min-height: 40px;
}

.study-nonanswer-confirm {
  color: var(--ink-0);
  background: var(--surface-3);
  border-color: rgba(208, 138, 88, 0.44);
}

.study-nonanswer-confirm:hover {
  background: #32363e;
  border-color: rgba(208, 138, 88, 0.62);
}

.study-agent-help,
[data-study-agent-help] {
  position: fixed;
  z-index: 40;
  right: 20px;
  bottom: 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  width: min(390px, calc(100vw - 40px));
  margin-top: 16px;
  padding: 12px 14px;
  color: var(--ink-0);
  background: var(--surface-1);
  border: 1px solid rgba(101, 152, 120, 0.38);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.18);
  text-align: left;
  animation: study-help-arrive 220ms var(--ease) both;
}

.study-agent-help > div:first-child,
[data-study-agent-help] > div:first-child {
  min-width: 0;
}

.study-agent-help strong,
[data-study-agent-help] strong {
  display: block;
  font-size: 14px;
  line-height: 1.35;
}

.study-agent-help p,
[data-study-agent-help] p {
  max-width: 34ch;
  margin: 3px 0 0;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.4;
}

.study-agent-help-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.study-agent-help-actions .button,
[data-dismiss-study-help] {
  min-height: 44px;
}

[data-dismiss-study-help] {
  min-width: 72px;
  touch-action: manipulation;
}

@keyframes study-help-arrive {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes study-warning-arrive {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

@keyframes study-next-action-arrive {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

@keyframes study-continuous-progress {
  from { transform: translateX(-110%); }
  to { transform: translateX(315%); }
}

.study-outcome-badge {
  position: absolute;
  z-index: 6;
  top: -14px;
  right: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 6px 13px;
  color: var(--paper-ink);
  background: var(--paper);
  border: 1px solid rgba(31, 32, 35, 0.2);
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
  font-size: 14px;
  font-weight: 760;
  letter-spacing: 0.025em;
  line-height: 1;
  pointer-events: none;
}

.study-outcome-badge[hidden] {
  display: none;
}

.study-card-scene[data-study-outcome="again"] ~ .study-outcome-badge {
  color: #6c2925;
  background: var(--study-again-soft);
  border-color: var(--study-again);
  animation: study-badge-again 620ms ease-out both;
}

.study-card-scene[data-study-outcome="hard"] ~ .study-outcome-badge {
  color: #70431d;
  background: var(--study-hard-soft);
  border-color: var(--study-hard);
  animation: study-badge-hard 760ms ease-out both;
}

.study-card-scene[data-study-outcome="good"] ~ .study-outcome-badge {
  color: #285238;
  background: var(--study-good-soft);
  border-color: var(--study-good);
  animation: study-badge-good 820ms var(--ease) both;
}

.study-card-scene[data-study-outcome="easy"] ~ .study-outcome-badge {
  color: #20513f;
  background: var(--study-easy-soft);
  border-color: var(--study-easy);
  animation: study-badge-easy 920ms var(--ease) both;
}

.study-card-scene[data-study-outcome="saved"] ~ .study-outcome-badge {
  color: var(--paper-ink);
  background: var(--paper);
  border-color: rgba(31, 32, 35, 0.28);
}

.study-card-scene[data-study-outcome="again"] ~ .study-outcome-badge:empty::before { content: "Again"; }
.study-card-scene[data-study-outcome="hard"] ~ .study-outcome-badge:empty::before { content: "Hard"; }
.study-card-scene[data-study-outcome="good"] ~ .study-outcome-badge:empty::before { content: "Good"; }
.study-card-scene[data-study-outcome="easy"] ~ .study-outcome-badge:empty::before { content: "Easy"; }
.study-card-scene[data-study-outcome="saved"] ~ .study-outcome-badge:empty::before { content: "Saved"; }

.study-card-scene[data-study-outcome="again"] .study-card-back {
  animation: study-outcome-again 760ms ease-out both;
}

.study-card-scene[data-study-outcome="hard"] .study-card-back {
  animation: study-outcome-hard 900ms ease-out both;
}

.study-card-scene[data-study-outcome="good"] .study-card-back {
  animation: study-outcome-good 920ms var(--ease) both;
}

.study-card-scene[data-study-outcome="easy"] .study-card-back {
  animation: study-outcome-easy 1050ms var(--ease) both;
}

@keyframes study-badge-again {
  0% { opacity: 0; transform: translateX(5px) scale(0.96); }
  42% { transform: translateX(-2px) scale(1); }
  68% { transform: translateX(1px) scale(1); }
  100% { opacity: 1; transform: none; }
}

@keyframes study-badge-hard {
  0% { opacity: 0; transform: translateY(-5px); }
  56% { opacity: 1; transform: translateY(2px); }
  100% { opacity: 1; transform: none; }
}

@keyframes study-badge-good {
  0% { opacity: 0; transform: translateY(5px) scale(0.96); }
  64% { opacity: 1; transform: translateY(-1px) scale(1.015); }
  100% { opacity: 1; transform: none; }
}

@keyframes study-badge-easy {
  0% { opacity: 0; transform: scale(0.92); }
  58% { opacity: 1; transform: scale(1.045); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes study-outcome-again {
  0%, 100% { border-color: #fbfaf3; box-shadow: none; }
  32% { border-color: var(--study-again); box-shadow: 0 0 0 4px rgba(169, 87, 80, 0.15); }
  62% { border-color: rgba(169, 87, 80, 0.62); box-shadow: 0 0 0 1px rgba(169, 87, 80, 0.08); }
}

@keyframes study-outcome-hard {
  0%, 100% { background: var(--paper); border-color: #fbfaf3; }
  45% { background: #f2eadf; border-color: rgba(184, 117, 58, 0.78); }
}

@keyframes study-outcome-good {
  0%, 100% { border-color: #fbfaf3; box-shadow: none; }
  58% { border-color: rgba(79, 128, 97, 0.78); box-shadow: 0 0 0 5px rgba(79, 128, 97, 0.12); }
}

@keyframes study-outcome-easy {
  0%, 100% { background: var(--paper); border-color: #fbfaf3; box-shadow: none; }
  40% { background: #eef2e8; border-color: rgba(55, 116, 93, 0.82); box-shadow: 0 0 0 5px rgba(55, 116, 93, 0.11); }
  68% { background: #f5f3e8; border-color: rgba(198, 166, 91, 0.72); box-shadow: 0 0 0 2px rgba(198, 166, 91, 0.08); }
}

.session-complete[data-session-completion] {
  position: absolute;
  z-index: 10;
  inset: 72px 0 0;
  align-items: safe center;
  justify-items: center;
  min-height: 0;
  padding: 28px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  background:
    radial-gradient(circle at 50% 38%, rgba(101, 152, 120, 0.13), transparent 38%),
    rgba(14, 15, 18, 0.94);
  border-radius: 18px;
  backdrop-filter: blur(12px);
}

.session-complete[data-session-completion] > div {
  width: min(560px, 100%);
  padding: clamp(28px, 5vw, 46px);
  background: var(--surface-1);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: 0 26px 72px rgba(0, 0, 0, 0.32);
  animation: study-complete-arrive 360ms var(--ease) both;
}

.session-complete[data-session-completion] h1 {
  font-size: clamp(36px, 7vw, 58px);
}

.session-complete[data-session-completion] .quiet {
  font-size: 16px;
  line-height: 1.55;
}

.study-completion-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  margin: 0 auto 24px;
  color: #e6f3e9;
  background: rgba(79, 128, 97, 0.16);
  border: 1px solid rgba(101, 152, 120, 0.52);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(101, 152, 120, 0.06);
}

.study-completion-mark span {
  font-size: 30px;
  font-weight: 760;
  line-height: 1;
}

.study-completion-mark i {
  position: absolute;
  width: 7px;
  height: 7px;
  background: #c6a65b;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(198, 166, 91, 0.08);
  animation: study-completion-spark 1.2s var(--ease) both;
}

.study-completion-mark i:nth-of-type(1) { top: -5px; left: 16px; }
.study-completion-mark i:nth-of-type(2) { top: 8px; right: -3px; animation-delay: 70ms; }
.study-completion-mark i:nth-of-type(3) { right: 8px; bottom: -2px; animation-delay: 140ms; }
.study-completion-mark i:nth-of-type(4) { bottom: 5px; left: -1px; animation-delay: 210ms; }

@keyframes study-completion-spark {
  from { opacity: 0; transform: scale(0.3); }
  58% { opacity: 1; transform: scale(1.2); }
  to { opacity: 0.82; transform: scale(1); }
}

@keyframes study-complete-arrive {
  from { opacity: 0; transform: translateY(10px) scale(0.985); }
  to { opacity: 1; transform: none; }
}

@media (min-width: 721px) and (min-height: 760px) {
  .session-shell .study-session-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 0;
    padding-block: clamp(28px, 4vh, 40px) 24px;
  }

  .session-shell .study-stage {
    padding: 0 0 18px;
  }
}

@media (max-width: 720px) {
  .session-shell {
    width: calc(100% - 28px);
    padding-bottom: max(24px, env(safe-area-inset-bottom));
  }

  .session-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
  }

  .session-progress {
    display: block;
    min-width: 0;
    margin-top: 12px;
  }

  .session-progress strong {
    font-size: 15px;
  }

  .session-progress [data-session-progress] {
    min-height: 0;
    margin-bottom: 6px;
    padding: 0;
  }

  .session-progress .progress-track {
    display: block;
    height: 6px;
  }

  .session-exit {
    grid-column: 2;
    grid-row: 1;
    min-width: 76px;
    min-height: 48px;
    padding-inline: 15px;
  }

  .study-stage {
    padding: 26px 0 14px;
  }

  .study-controls {
    min-height: 48px;
  }

  .study-manual-grade-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
  }

  .study-manual-grade {
    min-height: 60px;
  }

  .study-agent-help,
  [data-study-agent-help] {
    display: grid;
    gap: 14px;
    margin-top: 12px;
    padding: 15px;
    right: 14px;
    bottom: calc(76px + env(safe-area-inset-bottom));
    width: calc(100vw - 28px);
    max-height: min(52dvh, 420px);
    overflow: auto;
  }

  .study-agent-help-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .study-agent-help-actions .button {
    width: 100%;
  }

  .study-outcome-badge {
    top: -12px;
    right: 14px;
  }

  .session-complete[data-session-completion] {
    inset: 62px -4px 0;
    padding: 18px 8px;
    border-radius: 14px;
  }

  .session-complete[data-session-completion] > div {
    padding: 26px 20px;
  }
}

@media (max-width: 480px) {
  .session-deck-name {
    font-size: 16px;
  }

  .session-progress [data-session-progress]::before {
    display: none;
  }

  .chat-study-status {
    padding-inline: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .session-shell *,
  .session-shell *::before,
  .session-shell *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .study-agent-help,
  [data-study-agent-help],
  .study-outcome-badge,
  .session-complete[data-session-completion] > div {
    transform: none !important;
  }

  .study-completion-mark i {
    opacity: 0.82;
    animation: none !important;
    animation-delay: 0ms !important;
    transform: none !important;
  }

  .session-progress-continuous .progress-track span {
    animation: none !important;
    transform: none !important;
  }
}
/* Final local deck-action and graph cascade. Keep these rules last while this isolated pass is
   reviewed so older graph experiments cannot leak back into the surface. */
.deck-card .card-actions .button:not(.button-primary):not(.button-danger) {
  color: #f6f7f8;
  background: #2b2f35;
  border-color: #7e8691;
}

.graph-edge,
.graph-edge.is-pulsing {
  stroke: #9299a3;
  stroke-width: 1.7;
  stroke-dasharray: none;
  stroke-dashoffset: 0;
  animation: none;
}

.graph-edge.is-muted { opacity: 0.58; }
.graph-edge.is-traced { stroke: #e0e3e7; stroke-width: 2.1; }
.graph-edges marker path { fill: #b6bcc4; }

.graph-node,
.graph-node[data-learning="unseen"],
.graph-node[data-learning="learning"],
.graph-node[data-learning="established"],
.graph-node[data-mode="learning"],
.graph-node[data-mode="freshness"] {
  width: 170px;
  min-height: 58px;
  padding: 8px 13px;
  color: #f3f4f5;
  background: #1d2024;
  border-width: 3px;
  border-style: solid;
  border-radius: 17px;
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.24);
}

.graph-node:hover { color: #fff; background: #262a2f; }

.graph-node span,
.graph-world[data-zoom="overview"] .graph-node span {
  width: 100%;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  opacity: 1;
}

.graph-node.is-muted,
.graph-node.is-traced { color: #f3f4f5; opacity: 1; }
.graph-node.is-search-muted { opacity: 0.42; }
.graph-node.is-selected {
  color: #fff;
  background: #2b2f35;
  outline: none;
  box-shadow: 0 9px 24px rgba(0, 0, 0, 0.32);
}
.graph-node .node-recency,
.graph-node.is-pinned::after { display: none; }

.graph-legend {
  top: 16px;
  right: 20px;
  bottom: auto;
  left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  color: #d8dbe0;
  background: rgba(18, 20, 23, 0.97);
  border: 1px solid #4c525b;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 620;
  letter-spacing: 0;
  text-transform: none;
}

.graph-legend .recency-scale-title { color: #f0f1f3; font-size: 12px; font-weight: 700; }
.graph-legend .recency-scale {
  width: 108px;
  height: 7px;
  background: linear-gradient(90deg, #f3f0e8 0%, #efc85c 52%, #f0645f 100%);
  border: 0;
  border-radius: 999px;
}

.graph-inspector {
  width: min(340px, calc(100vw - 40px));
  background: #191b1f;
  border: 1px solid #505660;
  border-radius: 14px;
  box-shadow: 0 18px 52px rgba(0, 0, 0, 0.4);
  backdrop-filter: none;
}

.graph-inspector-header {
  padding: 14px 14px 8px;
  cursor: grab;
  touch-action: none;
  user-select: none;
}
.graph-inspector.is-dragging .graph-inspector-header { cursor: grabbing; }
.graph-inspector-header button { cursor: pointer; }
.graph-inspector-header h2 { margin-bottom: 2px; font-size: 21px; line-height: 1.12; }
.graph-inspector-body { padding: 0 14px 14px; color: #d9dce0; }
.inspector-state {
  gap: 20px;
  margin-bottom: 0;
  padding: 10px 0;
  border-top: 1px solid #343941;
  border-bottom: 1px solid #343941;
}
.inspector-state > div { padding: 0; background: transparent; border: 0; }
.inspector-state strong { color: #f2f3f4; font-size: 13px; }
.inspector-state span { color: #969da7; font-size: 10px; }
.inspector-disclosure {
  padding: 0;
  border-bottom: 1px solid #343941;
}
.inspector-disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  color: #f0f1f2;
  font-size: 12px;
  font-weight: 720;
  cursor: pointer;
  list-style: none;
}
.inspector-disclosure summary::-webkit-details-marker { display: none; }
.inspector-disclosure summary::after {
  content: "+";
  flex: 0 0 auto;
  color: #aeb3bb;
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
}
.inspector-disclosure[open] summary::after { content: "−"; }
.inspector-disclosure[open] summary { padding-bottom: 8px; }
.inspector-disclosure summary span {
  margin-left: auto;
  color: #9da3ac;
  font-size: 11px;
  font-weight: 500;
}
.inspector-definition-content { padding-bottom: 13px; color: #d2d5da; font-size: 14px; line-height: 1.48; }
.inspector-definition-content > :first-child { margin-top: 0; }
.inspector-definition-content > :last-child { margin-bottom: 0; }
.inspector-definition-content p { margin: 0 0 9px; }
.inspector-definition-content ul,
.inspector-definition-content ol { margin: 7px 0; padding-left: 20px; }
.inspector-section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.inspector-section-heading span { color: #9da3ac; font-size: 11px; }
.inspector-review-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 3px 0 12px;
}
.inspector-review-summary span {
  color: #9299a3;
  font-size: 9px;
  line-height: 1.35;
  text-transform: uppercase;
}
.inspector-review-summary strong {
  display: block;
  overflow-wrap: anywhere;
  margin-bottom: 3px;
  color: #f0f1f3;
  font-size: 12px;
  font-weight: 680;
  text-transform: none;
}
.inspector-review-history {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.inspector-reviews .inspector-review-history { padding-bottom: 13px; }
.inspector-review-history li {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 5px 7px;
  color: #e4e6e9;
  background: #22252a;
  border-radius: 7px;
  font-size: 10px;
}
.inspector-review-history li span { color: #999fa8; }
.inspector-review-history li.is-empty { padding-left: 0; background: transparent; }
.graph-inspector .inspector-list { margin: 8px 0 12px; }
.graph-inspector .inspector-list li { font-size: 12px; }

@media (max-width: 720px) {
  .graph-legend { top: 10px; right: 10px; padding: 8px 9px; }
  .graph-legend .recency-scale { width: 72px; }
  .graph-inspector { width: min(340px, calc(100vw - 24px)); }
}

/* Graph review pass: make the compact view controls read as active controls
   and give every connector a little more visual weight. */
.graph-zoom {
  background: #1d2025;
  border-color: #555c67;
}

.graph-zoom button {
  color: #e1e4e8;
  opacity: 1;
}

.graph-zoom button:hover,
.graph-zoom button:focus-visible {
  color: #ffffff;
  background: #30353d;
}

.graph-edge,
.graph-edge.is-pulsing {
  stroke-width: 2.35;
}

.graph-edge.is-traced {
  stroke-width: 2.7;
}

.graph-edges marker path {
  fill: #c1c6cd;
}

/* Graph revision 10: complete-deck comparison and balanced spacing. */
.graph-page {
  grid-template-rows: auto minmax(0, 1fr);
}

.graph-page.has-comparison {
  grid-template-rows: auto auto minmax(0, 1fr);
}

.graph-comparison-bar {
  z-index: 18;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  min-height: 88px;
  padding: 8px 20px;
  background: #111317;
  border-bottom: 1px solid #30353c;
}

.graph-scenario-previews {
  display: flex;
  min-width: 0;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.graph-scenario-previews button {
  display: grid;
  grid-template-columns: minmax(76px, auto) 88px;
  align-items: center;
  flex: 1 0 164px;
  min-width: 0;
  height: 70px;
  padding: 7px 8px 7px 10px;
  color: #aeb4bc;
  background: #181b20;
  border: 1px solid #393f48;
  border-radius: 11px;
  cursor: pointer;
}

.graph-scenario-previews button:hover,
.graph-scenario-previews button:focus-visible {
  color: #fff;
  border-color: #69717d;
}

.graph-scenario-previews button[aria-pressed="true"] {
  color: #fff;
  background: #202329;
  border-color: #e6bd63;
  box-shadow: 0 0 16px rgba(230, 189, 99, 0.1);
}

.graph-scenario-previews button > span {
  display: grid;
  gap: 3px;
  text-align: left;
}

.graph-scenario-previews strong { font-size: 11px; line-height: 1.15; }
.graph-scenario-previews small { color: #9299a3; font-size: 9px; }
.graph-scenario-previews svg { width: 88px; height: 50px; overflow: visible; }
.graph-scenario-previews .scenario-edges path {
  fill: none;
  stroke-width: 1.15;
  opacity: 0.42;
  vector-effect: non-scaling-stroke;
}
.graph-scenario-previews .scenario-nodes rect {
  fill: #1d2024;
  stroke-width: 1.35;
  vector-effect: non-scaling-stroke;
}

.graph-workspace .graph-search {
  position: absolute;
  top: 16px;
  left: 20px;
  width: min(290px, calc(100vw - 40px));
  margin: 0;
}

.graph-edge,
.graph-edge.is-pulsing {
  stroke-width: 2.8;
  stroke-linecap: round;
  opacity: 0.78;
}

.graph-edge.is-muted { opacity: 0.34; }
.graph-edge.is-traced {
  stroke-width: 3.25;
  opacity: 1;
  filter: drop-shadow(0 0 3px rgba(239, 200, 92, 0.24));
}

.graph-edges marker path {
  fill: #c8c3b7;
  fill: context-stroke;
}

.graph-node,
.graph-node[data-learning="learning"],
.graph-node[data-learning="established"] {
  color: #f2f3f4;
  background: #1d2024;
  border-radius: 17px;
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.24), 0 0 14px rgba(239, 200, 92, 0.07);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

.graph-node[data-learning="unseen"] {
  color: #c3c8cf;
  background: #181b1f;
  border-color: #626a75;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.graph-node.is-muted {
  color: #8e949d;
  opacity: 0.6;
  box-shadow: none;
}

.graph-node.is-traced,
.graph-node.is-selected { opacity: 1; }

.graph-node span {
  transition: opacity 120ms ease;
}

.graph-world[data-zoom="overview"] .graph-node span {
  opacity: 0;
  visibility: hidden;
}

.inspector-preview-note {
  margin: 0 0 8px;
  color: #e6bd63;
  font-size: 10px;
  font-weight: 700;
}

@media (max-width: 720px) {
  .graph-comparison-bar {
    grid-template-columns: minmax(0, 1fr);
    min-height: 82px;
    padding: 6px 12px;
  }
  .graph-scenario-previews button {
    grid-template-columns: 1fr;
    flex-basis: 104px;
    height: 66px;
    padding: 7px 8px;
  }
  .graph-scenario-previews svg { display: none; }
  .graph-workspace .graph-search {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    width: auto;
    margin: 0;
  }
  .graph-workspace { grid-row: auto; }
}

/* Saved-deck graphs are learner dashboards; Library graphs remain neutral
   structure previews until a course has been added and studied. */
.graph-node[data-progress-source="learner"] {
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 66px;
  padding-right: 24px;
}

.graph-node[data-progress-source="learner"] span {
  text-align: left;
}

.graph-node[data-progress-source="learner"] .node-progress-label {
  display: block;
  margin-top: 5px;
  color: #aeb5bf;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.045em;
  line-height: 1;
  text-transform: uppercase;
}

.graph-world[data-zoom="overview"] .graph-node[data-progress-source="learner"] .node-progress-label {
  opacity: 0;
  visibility: hidden;
}

.graph-node[data-progress-source="learner"][data-learning="unseen"] {
  color: #adb2ba;
  background: #15171a;
  border-color: #484d55;
  border-style: dashed;
}

.graph-node[data-progress-source="learner"][data-learning="learning"] {
  color: #e7f0ec;
  background: #1c2924;
  border-color: #5d8a72;
  border-style: solid;
}

.graph-node[data-progress-source="learner"][data-learning="established"] {
  color: #f2f7f4;
  background: #264236;
  border-color: #86b79c;
  border-style: solid;
}

.graph-node[data-progress-source="learner"] .node-recency {
  display: block;
  width: 8px;
  height: 8px;
}

.graph-node[data-progress-source="learner"][data-freshness="new"] .node-recency { background: #6d737c; }
.graph-node[data-progress-source="learner"][data-freshness="fresh"] .node-recency { background: #78b8d0; }
.graph-node[data-progress-source="learner"][data-freshness="soon"] .node-recency { background: #e1a35c; }
.graph-node[data-progress-source="learner"][data-freshness="due"] .node-recency { background: #e16d65; }

.graph-node[data-progress-source="structure"] {
  color: #f3f4f5;
  background: #1d2024;
  border-color: #555c66;
  border-style: solid;
}

.graph-node[data-progress-source="structure"] .node-recency { display: none; }

.graph-structure-note {
  margin: 0;
  padding: 10px 0;
  color: var(--ink-2);
  border-top: 1px solid #343941;
  border-bottom: 1px solid #343941;
  font-size: 13px;
  line-height: 1.45;
}

.graph-legend > strong {
  color: #f0f1f3;
  font-size: 12px;
  font-weight: 700;
}

.graph-node[data-progress-source]:hover {
  color: #fff;
  filter: brightness(1.12);
}

.graph-node[data-progress-source].is-traced {
  color: #fff;
  background: #272b31;
  opacity: 1;
  box-shadow: 0 0 0 1px #c4cad2, 0 7px 18px rgba(0, 0, 0, 0.24);
}

.graph-node[data-progress-source].is-selected {
  color: #fff;
  background: #272b31;
  opacity: 1;
  outline: 2px solid #f2f3f4;
  outline-offset: 3px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.38);
}

@media (max-width: 720px) {
  body[data-route="graph"] .graph-page {
    grid-template-rows: auto minmax(0, 1fr);
  }

  body[data-route="graph"] .graph-page.has-comparison {
    grid-template-rows: auto auto minmax(0, 1fr);
  }

  .graph-legend {
    top: 64px;
    right: 12px;
    left: 12px;
    justify-content: flex-end;
    flex-wrap: wrap;
  }
}

/* Graph revision 18: real learner progress, complete-deck spacing, and an
   opaque selected relationship neighborhood. This final block intentionally
   wins over the retired comparison-preview styling above. */
.graph-page {
  grid-template-rows: auto minmax(0, 1fr);
}

.graph-workspace .graph-search {
  position: absolute;
  top: 16px;
  left: 20px;
  width: min(290px, calc(100vw - 40px));
  margin: 0;
}

.graph-edge,
.graph-edge.is-pulsing {
  stroke-width: 2.8;
  stroke-linecap: round;
  opacity: 0.78;
}

.graph-edge.is-muted { opacity: 0.34; }
.graph-edge.is-traced {
  stroke-width: 3.25;
  opacity: 1;
  filter: drop-shadow(0 0 3px rgba(239, 200, 92, 0.24));
}

.graph-edges marker path {
  fill: #c8c3b7;
  fill: context-stroke;
}

.graph-node,
.graph-node[data-progress-source="learner"],
.graph-node[data-progress-source="learner"][data-learning="learning"],
.graph-node[data-progress-source="learner"][data-learning="established"] {
  color: #f2f3f4;
  background: #1d2024;
  border-radius: 17px;
  border-style: solid;
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.24), 0 0 14px rgba(239, 200, 92, 0.07);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

.graph-node[data-learning="unseen"],
.graph-node[data-progress-source="learner"][data-learning="unseen"] {
  color: #c3c8cf;
  background: #181b1f;
  border-color: #626a75;
  border-style: solid;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.graph-node.is-muted,
.graph-node[data-progress-source].is-muted {
  color: #8e949d;
  opacity: 0.6;
  box-shadow: none;
}

.graph-node.is-traced,
.graph-node.is-selected {
  color: #ffffff;
  background: #272b31;
  opacity: 1;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.3), 0 0 18px rgba(239, 200, 92, 0.12);
}

.graph-node[data-progress-source].is-traced,
.graph-node[data-progress-source].is-selected {
  color: #ffffff;
  background: #272b31;
  opacity: 1;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.3), 0 0 18px rgba(239, 200, 92, 0.12);
}

.graph-node span {
  transition: opacity 120ms ease;
}

.graph-world[data-zoom="overview"] .graph-node span {
  opacity: 0;
  visibility: hidden;
}

.graph-structure-note {
  margin: 0;
  color: var(--ink-2);
  font-size: 13px;
  line-height: 1.45;
}

@media (max-width: 720px) {
  .graph-workspace .graph-search {
    position: absolute;
    top: 12px;
    left: 12px;
    width: min(250px, calc(100vw - 132px));
    margin: 0;
  }
  .graph-workspace { grid-row: auto; }
}