/* IELTSIMP — Editorial stylesheet
 * Drop-in replacement for the original styles.css, targeting the same
 * class names so app.js works unchanged.
 *
 * Aesthetic: warm paper, Source Serif 4 + Noto Sans SC, restraint over chrome.
 */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,500;0,8..60,600;1,8..60,400;1,8..60,500&family=Noto+Sans+SC:wght@400;500;600&family=Noto+Serif+SC:wght@400;500;600&family=Inter:wght@400;500;600&display=swap');

/* ─── Tokens ──────────────────────────────────────────────────── */

:root {
  color-scheme: light;

  /* Warm paper palette */
  --paper: #f3ece0;
  --paper-soft: #ede4d4;
  --surface: #faf5ea;
  --surface-raised: #ffffff;
  --surface-warm: #f7efe0;
  --surface-sunken: #ece2d0;
  --surface-muted: #ede4d4;

  --ink: #2a201a;
  --ink-soft: #4a3c30;
  --muted: #8a7a68;
  --hairline: #d9ccb4;
  --hairline-soft: #e8dfcc;

  --accent: #6b4a30;
  --accent-deep: #523619;
  --accent-soft: #c9b696;

  /* Compatibility with original variables */
  --bg: var(--paper);
  --line: var(--hairline-soft);
  --line-strong: var(--hairline);
  --accent-dark: var(--accent-deep);
  --clay: var(--accent-soft);
  --sage: var(--accent);
  --gold: var(--accent-soft);

  /* Typography */
  --serif-en: "Source Serif 4", "Libre Caslon Text", Georgia, serif;
  --sans-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --serif-cn: "Noto Serif SC", "Songti SC", serif;
  --sans-ui: "Inter", "SF Pro Text", system-ui, -apple-system, sans-serif;
  --font: var(--serif-en), var(--sans-cn);
  --font-display: var(--serif-en), var(--serif-cn), serif;
  --font-cn: var(--sans-cn);

  --font-size-caption: 12px;
  --font-size-label: 13px;
  --font-size-body: 16px;
  --font-size-body-large: 18px;
  --font-size-title: 22px;
  --font-size-page-title: 32px;
  --font-size-word: 64px;

  --line-tight: 1.1;
  --line-title: 1.25;
  --line-body: 1.65;
  --line-reading: 1.75;

  --radius: 16px;
  --radius-sm: 12px;
  --radius-lg: 22px;
  --nav-height: 76px;

  --shadow: 0 1px 2px rgba(60, 40, 20, 0.04), 0 8px 24px rgba(80, 55, 30, 0.06);
  --shadow-soft: 0 1px 1px rgba(60, 40, 20, 0.03), 0 3px 10px rgba(80, 55, 30, 0.04);
  --shadow-hairline: 0 1px 0 rgba(255, 255, 255, 0.5) inset, 0 1px 2px rgba(60, 40, 20, 0.03);
  --shadow-raised: 0 2px 4px rgba(60, 40, 20, 0.04), 0 12px 32px rgba(80, 55, 30, 0.08);

  --ease-standard: cubic-bezier(0.2, 0.72, 0.18, 1);
  --ease-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-fast: 140ms;
  --motion-medium: 240ms;
  --motion-slow: 420ms;
}

:root[data-color-mode="dark"] {
  color-scheme: dark;
  --paper: #1c1814;
  --paper-soft: #221d18;
  --surface: #25201a;
  --surface-raised: #2a2520;
  --surface-warm: #2d2620;
  --surface-sunken: #1a1612;
  --surface-muted: #221d18;

  --ink: #ede4d2;
  --ink-soft: #c9bea9;
  --muted: #8a7d6a;
  --hairline: #3a3128;
  --hairline-soft: #2e271f;

  --accent: #c9a878;
  --accent-deep: #d9b888;
  --accent-soft: #6b5238;

  --bg: var(--paper);
  --line: var(--hairline-soft);
  --line-strong: var(--hairline);
  --accent-dark: var(--accent-deep);
}

:root[data-light-palette="white"] {
  --paper: #f8f4eb;
  --paper-soft: #f0e9db;
  --surface: #fdfaf3;
  --surface-warm: #f8f1e2;
  --bg: var(--paper);
}

@property --score-deg {
  syntax: "<angle>";
  inherits: true;
  initial-value: 234deg;
}

/* ─── Base ────────────────────────────────────────────────────── */

* { box-sizing: border-box; }

html { scroll-behavior: auto; overflow-x: hidden; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--font-size-body);
  line-height: var(--line-body);
  letter-spacing: 0;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "kern", "liga", "calt", "onum";
}

button, input { font: inherit; }
button {
  cursor: pointer;
  background: none;
  border: 0;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
button:disabled { cursor: default; opacity: 0.5; }

h1, h2, h3, p, blockquote { margin-top: 0; }

svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

/* ─── App shell ──────────────────────────────────────────────── */

.app-shell { display: block; min-height: 100svh; }

.side-nav, .study-clock, .brand { display: none; }

/* ─── Mobile masthead ──────────────────────────────────────── */

.main-app {
  width: min(720px, 100%);
  max-width: 100%;
  margin: 0 auto;
  padding: 0 24px 28px;
  overflow-x: clip;
}

.mobile-masthead {
  position: sticky;
  top: 0;
  z-index: 14;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 -24px 24px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--hairline-soft);
  background: color-mix(in srgb, var(--paper) 92%, white);
  backdrop-filter: blur(20px);
}

:root[data-color-mode="dark"] .mobile-masthead {
  background: color-mix(in srgb, var(--paper) 88%, black);
}

.brand-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  min-width: 0;
  font-family: var(--serif-en);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: transparent;
}

.brand-logo-image {
  display: block;
  width: 32px;
  height: 32px;
  object-fit: contain;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.mobile-masthead .brand-mark { width: 30px; height: 30px; }
.mobile-masthead .brand-mark .brand-logo-image { width: 30px; height: 30px; }

.menu-button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  border: 0;
  transition: background var(--motion-fast) var(--ease-standard);
}
.menu-button:hover {
  background: var(--surface-warm);
  color: var(--accent);
}

.menu-button svg { width: 20px; height: 20px; }

/* ─── Top bar (greeting) ─────────────────────────────────── */

.topbar {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

body:not([data-route="home"]) .topbar { display: none; }

.time-label, .section-label {
  margin: 0 0 8px;
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0 0 0;
  font-family: var(--font-display);
  font-size: var(--font-size-page-title);
  line-height: var(--line-title);
  font-weight: 400;
  letter-spacing: -0.012em;
  overflow-wrap: anywhere;
  color: var(--ink);
}

h2 {
  margin-bottom: 0;
  font-family: var(--font-display);
  font-size: var(--font-size-title);
  line-height: var(--line-title);
  font-weight: 500;
  color: var(--ink);
}

.top-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.mini-stat {
  padding: 14px 16px;
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius);
  background: var(--surface-raised);
  box-shadow: var(--shadow-soft);
}

.mini-stat span {
  display: block;
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -0.01em;
}

.mini-stat small {
  display: block;
  margin-top: 6px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
}

/* ─── Quote strip ─────────────────────────────────────────── */

.quote-strip {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 36px;
  align-items: start;
  gap: 14px;
  margin-bottom: 24px;
  padding: 18px 0 20px;
  border: 0;
  border-top: 1px solid var(--hairline-soft);
  border-bottom: 1px solid var(--hairline-soft);
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  max-width: 100%;
  min-width: 0;
}

.quote-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: transparent;
  color: var(--accent-soft);
  border: 0;
  box-shadow: none;
  opacity: 1;
}
.quote-icon svg { width: 20px; height: 20px; stroke-width: 1.6; }

.quote-copy { min-width: 0; display: grid; gap: 6px; }
.quote-copy span {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.quote-copy blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 18px;
  line-height: 1.5;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0;
  -webkit-line-clamp: unset;
  display: block;
  overflow: visible;
  overflow-wrap: anywhere;
}
.quote-copy cite {
  display: block;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  border: 0;
  box-shadow: none;
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.icon-button:hover {
  background: var(--surface-warm);
  color: var(--accent);
  transform: none;
}
.icon-button svg { width: 18px; height: 18px; }

button.is-pressing, button:active { transform: scale(0.985); }

/* ─── Page sections ─────────────────────────────────────── */

.page-section { display: none; scroll-margin-top: 76px; }
.page-section.active {
  display: block;
  animation: page-enter var(--motion-slow) var(--ease-soft) both;
}
#learn.active { display: grid; gap: 16px; }

@keyframes page-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.feature-page-header { margin-bottom: 16px; }

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
  background: transparent;
  border: 0;
  padding: 4px 0;
  border-radius: 0;
  letter-spacing: 0.01em;
  transition: color var(--motion-fast) var(--ease-standard);
}
.back-button:hover { color: var(--accent); transform: none; box-shadow: none; }
.back-button svg { width: 14px; height: 14px; }

/* ─── Panels (cards) ──────────────────────────────────── */

.panel {
  background: var(--surface-raised);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 0;
  position: relative;
  overflow: hidden;
  max-width: 100%;
  min-width: 0;
}

:root[data-color-mode="dark"] .panel {
  background: var(--surface-raised);
  border-color: var(--hairline);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25), 0 8px 24px rgba(0, 0, 0, 0.32);
}

.word-panel, .practice-panel, .understanding-panel, .score-panel,
.plan-panel, .review-panel, .spelling-panel, .library-panel, .home-action-panel {
  padding: 26px 24px;
}

/* Page-distinct top accent — a thin colored bar at panel top.
   Each detail page gets its own hue for instant recognition. */
.word-panel::before,
.review-panel::before,
.spelling-panel::before,
.library-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  opacity: 0.9;
  z-index: 1;
  pointer-events: none;
}

.word-panel::before {
  background: linear-gradient(90deg, #b08049, #d4b896);  /* warm coffee */
}
.review-panel::before {
  background: linear-gradient(90deg, #7d6044, #c4a884);  /* muted clay */
}
.spelling-panel::before {
  background: linear-gradient(90deg, #5a4534, #a08868);  /* deep walnut */
}
.library-panel::before {
  background: linear-gradient(90deg, #8a7460, #c4b094);  /* soft sand */
}

:root[data-color-mode="dark"] .word-panel::before {
  background: linear-gradient(90deg, #d9b888, #f0d4a8);
}
:root[data-color-mode="dark"] .review-panel::before {
  background: linear-gradient(90deg, #c9a878, #e0c898);
}
:root[data-color-mode="dark"] .spelling-panel::before {
  background: linear-gradient(90deg, #b89868, #d8b888);
}
:root[data-color-mode="dark"] .library-panel::before {
  background: linear-gradient(90deg, #a89478, #c8b494);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}
.panel-heading.compact { margin-bottom: 16px; }

/* ─── Pills (level / trend / accuracy) ─────────────────── */

.level-pill, .trend, .accuracy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans-ui);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  min-height: auto;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--hairline);
  color: var(--muted);
  line-height: 1.2;
}

.level-pill {
  color: var(--accent);
  border-color: var(--accent-soft);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}
.trend { color: var(--accent); }

/* ─── Word title + meta ───────────────────────────────── */

#wordTitle, #reviewWordTitle {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: var(--font-size-word);
  line-height: 0.95;
  font-weight: 400;
  letter-spacing: -0.028em;
  color: var(--ink);
}

.word-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin: 0 0 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--hairline-soft);
}

.word-meta span {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--muted);
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 16px;
  line-height: 1.2;
  min-height: 0;
}

.word-meta span:nth-child(2) {
  font-style: normal;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-left: auto;
  padding: 3px 10px;
  border: 1px solid var(--accent-soft);
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.word-definition {
  margin: 0 0 28px;
  border-left: 0;
  padding-left: 0;
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink);
}

/* ─── Learning flow steps ─────────────────────────────── */

.learning-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--hairline-soft);
}

.flow-step {
  display: inline-flex;
  align-items: center;
  background: transparent;
  border: 0;
  font-family: var(--serif-en);
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  padding: 0;
  letter-spacing: 0.02em;
  min-height: 0;
  white-space: nowrap;
}

.flow-step.active {
  color: var(--accent);
  font-weight: 500;
  font-style: normal;
}

/* ─── Learning copy / sections ────────────────────────── */

.learning-copy {
  min-height: 0;
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  margin-bottom: 24px;
}

.learning-copy h3 {
  margin: 0 0 12px;
  font-family: var(--sans-ui);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.learning-copy p {
  margin: 0 0 12px;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
}

.learning-copy p:last-child { margin-bottom: 0; }

.learning-copy strong {
  color: var(--accent);
  font-weight: 500;
  font-style: italic;
}

.learning-brief {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  margin-bottom: 16px;
}

.learning-brief span {
  display: inline-flex;
  background: transparent;
  color: var(--muted);
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  padding: 0;
  min-height: 0;
  font-weight: 400;
}

.learning-brief p {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
}

.meaning-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.meaning-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
}

.meaning-list span {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 15px;
  color: var(--accent);
  background: transparent;
  border-radius: 0;
  width: auto;
  min-height: 0;
  padding: 0;
}

.meaning-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.supplemental-meanings {
  margin-top: 16px;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 14px;
}

.supplemental-meanings summary {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.supplemental-meanings summary::-webkit-details-marker { display: none; }
.supplemental-meanings[open] summary { color: var(--accent); }

.example-list strong {
  color: var(--ink);
  font-style: italic;
  font-weight: 500;
}

.example-list small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

/* ─── Learn stage panel ───────────────────────────────── */

.learn-stage-panel {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline-soft);
  border-bottom: 1px solid var(--hairline-soft);
  background: transparent;
  border-radius: 0;
}

.learn-stage-panel[hidden], [hidden] { display: none !important; }

/* ─── Action row (primary/secondary buttons) ─────────── */

.action-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 22px;
}

@media (min-width: 480px) {
  .action-row { grid-template-columns: 1fr 1fr; }
  .action-row .ghost-action { grid-column: 1 / -1; }
}

.primary-action, .secondary-action, .ghost-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 18px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--radius-sm);
  transition: background var(--motion-fast) var(--ease-standard),
    border-color var(--motion-fast) var(--ease-standard),
    color var(--motion-fast) var(--ease-standard),
    transform var(--motion-fast) var(--ease-standard);
  border: 1px solid transparent;
}

.primary-action {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
  box-shadow: none;
}
.primary-action:hover {
  background: var(--accent-deep);
  border-color: var(--accent-deep);
  transform: none;
  box-shadow: none;
}

.secondary-action {
  background: var(--surface-warm);
  border-color: var(--hairline);
  color: var(--accent);
  box-shadow: none;
}
.secondary-action:hover {
  background: var(--paper-soft);
  transform: none;
  box-shadow: none;
}

.ghost-action {
  background: transparent;
  border-color: var(--hairline-soft);
  color: var(--ink-soft);
  box-shadow: none;
}
.ghost-action:hover {
  background: var(--surface-warm);
  border-color: var(--hairline);
  transform: none;
  box-shadow: none;
}

.button-icon { display: inline-grid; place-items: center; width: 18px; height: 18px; }

/* ─── Home grid + flow items ─────────────────────────── */

.home-grid { display: grid; gap: 28px; align-items: start; }

.home-action-panel { order: -1; }
.score-panel { order: 2; }

/* The "today path" entry list */
.flow-list { display: grid; gap: 0; margin-top: 4px; }

.flow-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 18px;
  gap: 18px;
  align-items: baseline;
  min-height: 0;
  padding: 22px 12px;
  margin: 0 -12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  box-shadow: none;
  position: relative;
  transition: background var(--motion-fast) var(--ease-standard);
}

.flow-item::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  border-bottom: 1px solid var(--hairline-soft);
  transition: opacity var(--motion-fast) var(--ease-standard);
}

.flow-item:last-child::before { display: none; }

.flow-item:hover {
  background: var(--surface-warm);
  transform: none;
  box-shadow: none;
}

.flow-item:hover::before {
  opacity: 0;
}

.flow-item span {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 22px;
  color: var(--accent);
  background: transparent;
  border-radius: 0;
  width: auto;
  min-width: 0;
  height: auto;
  font-weight: 400;
  box-shadow: none;
  display: inline-block;
  line-height: 1;
}

.flow-item strong {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.005em;
  align-self: baseline;
  color: var(--ink);
}

.flow-item small {
  grid-column: 2;
  grid-row: 2;
  margin-top: 2px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.4;
  align-self: start;
}

.flow-item::after {
  content: "→";
  grid-column: 3;
  grid-row: 1;
  align-self: center;
  font-family: var(--serif-en);
  font-style: italic;
  color: var(--muted);
  font-size: 16px;
  transform: none;
  border: 0;
  width: auto;
  height: auto;
  transition: transform var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}

.flow-item:hover::after {
  color: var(--accent);
  transform: translateX(4px);
}

/* ─── Daily goal card ─────────────────────────────────── */

.daily-goal-card {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
}

.daily-goal-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
}

.daily-goal-top span {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.daily-goal-top strong {
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 24px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
}

.daily-goal-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
}

.progress-track {
  height: 4px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-sunken);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width var(--motion-medium) var(--ease-standard);
}

.daily-track { height: 4px; }

/* ─── Score panel ─────────────────────────────────────── */

.score-ring {
  display: grid;
  place-items: center;
  width: 100%;
  height: auto;
  margin: 4px 0 16px;
  border-radius: 0;
  background: none;
  text-align: left;
}

.score-ring::before {
  content: none;
}

.score-ring span {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 48px;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}

.score-ring small {
  grid-column: 1;
  grid-row: 1;
  align-self: end;
  margin-bottom: -22px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
  text-align: left;
  justify-self: start;
}

.adaptive-summary {
  display: grid;
  gap: 12px;
  margin-bottom: 12px;
}

.adaptive-summary > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.adaptive-summary span {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.adaptive-summary strong {
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}

.score-note {
  margin: 14px 0 0;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.score-controls {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--hairline-soft);
}

/* ─── Choice grid (quiz options) ─────────────────────── */

.choice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 480px) {
  .choice-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 479px) {
  :root {
    --font-size-page-title: 28px;
    --font-size-word: 52px;
  }

  .main-app {
    padding-inline: 18px;
    padding-bottom: 24px;
  }

  .mobile-masthead {
    margin-inline: -18px;
    margin-bottom: 20px;
    padding: 12px 18px;
  }

  .topbar {
    gap: 14px;
    margin-bottom: 22px;
  }

  .top-actions {
    gap: 10px;
  }

  .mini-stat {
    padding: 13px 14px;
  }

  .quote-strip {
    grid-template-columns: minmax(0, 1fr) 34px;
    gap: 12px;
    margin-bottom: 20px;
    padding: 16px 0 18px;
  }

  .quote-icon {
    display: none;
  }

  .quote-copy blockquote {
    font-size: 17px;
    line-height: 1.48;
  }

  .word-panel,
  .practice-panel,
  .understanding-panel,
  .score-panel,
  .plan-panel,
  .review-panel,
  .spelling-panel,
  .library-panel,
  .home-action-panel {
    padding: 22px 20px;
    border-radius: 18px;
  }

  .flow-item {
    grid-template-columns: 30px minmax(0, 1fr) 16px;
    gap: 13px;
    padding: 18px 8px;
    margin-inline: -8px;
  }

  .flow-item span {
    font-size: 20px;
  }

  .flow-item strong {
    font-size: 20px;
  }

  .flow-item small {
    font-size: 13.5px;
  }

  .streak-block,
  .recent-block {
    margin-top: 22px;
    padding-top: 22px;
  }

  .streak-grid {
    gap: 5px;
  }

  .streak-cell {
    padding: 10px 2px;
  }

  .streak-date {
    font-size: 17px;
  }

  .recent-item {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 4px 10px;
  }

  .recent-phonetic {
    margin-left: 0;
  }
}

@media (max-width: 359px) {
  .top-actions {
    grid-template-columns: 1fr;
  }

  .streak-day {
    font-size: 9px;
    letter-spacing: 0.08em;
  }

  .streak-date {
    font-size: 15px;
  }
}

.choice-button {
  min-height: 50px;
  padding: 12px 16px;
  background: transparent;
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.01em;
  text-align: left;
  transition: border-color var(--motion-fast) var(--ease-standard),
    background var(--motion-fast) var(--ease-standard);
}

.choice-button:hover {
  border-color: var(--accent-soft);
  background: var(--surface-warm);
  transform: none;
  box-shadow: none;
}

.choice-button.correct {
  border-color: #5a7d4a;
  background: color-mix(in srgb, #5a7d4a 8%, transparent);
  color: #2d4524;
}

.choice-button.wrong {
  border-color: #a85a3a;
  background: color-mix(in srgb, #a85a3a 8%, transparent);
  color: #5a2818;
}

/* ─── Quiz prompt + feedback ─────────────────────────── */

.quiz-prompt {
  margin: 0 0 14px;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  min-height: 0;
}

.quiz-feedback {
  margin: 12px 0 0;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  min-height: 22px;
}

/* ─── Spelling input ─────────────────────────────────── */

.spelling-input-wrap {
  display: grid;
  gap: 10px;
  margin: 18px 0 12px;
}

.spelling-input-wrap span {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.spelling-input-wrap input {
  padding: 14px 0;
  background: transparent;
  border: 0;
  border-bottom: 2px solid var(--hairline);
  border-radius: 0;
  color: var(--ink);
  font-family: var(--serif-en);
  font-size: 32px;
  font-weight: 400;
  letter-spacing: -0.01em;
  outline: none;
  transition: border-color var(--motion-fast) var(--ease-standard);
}

.spelling-input-wrap input:focus {
  border-bottom-color: var(--accent);
  box-shadow: none;
}

.spelling-input-wrap input.is-correct {
  border-bottom-color: #5a7d4a;
  color: #2d4524;
  background: transparent;
}

.spelling-input-wrap input.is-wrong {
  border-bottom-color: #a85a3a;
  color: #5a2818;
  background: transparent;
}

.spelling-status {
  display: inline-flex;
  align-items: center;
  margin: 0 0 14px;
  padding: 0;
  background: transparent;
  border: 0;
  font-family: var(--sans-ui);
  color: var(--accent);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  min-height: 0;
}

.spelling-meaning-list { display: grid; gap: 10px; margin-top: 14px; }
.spelling-meaning-list span {
  display: block;
  border: 0;
  background: transparent;
  border-radius: 0;
  padding: 0;
  color: var(--ink-soft);
  font-family: var(--font);
  font-size: 14.5px;
  line-height: 1.7;
}
.spelling-meaning-list strong {
  display: inline-block;
  min-width: 0;
  margin-right: 8px;
  font-family: var(--serif-en);
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.spelling-correction {
  display: grid;
  gap: 6px;
  margin: 12px 0;
  padding: 14px 16px;
  border: 1px solid color-mix(in srgb, #a85a3a 28%, var(--hairline-soft));
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, #a85a3a 6%, transparent);
  color: #5a2818;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.65;
}

/* ─── Advanced entry grid ────────────────────────────── */

.advanced-entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 4px 0 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--hairline-soft);
}

.advanced-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 12px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius);
  text-align: left;
  font-family: var(--font);
  color: var(--ink);
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard),
    border-color var(--motion-fast) var(--ease-standard),
    transform var(--motion-fast) var(--ease-standard),
    box-shadow var(--motion-fast) var(--ease-standard);
}

.advanced-entry:nth-child(2) {
  padding-left: 18px;
  border-left: 1px solid var(--hairline-soft);
}

.advanced-entry:hover {
  background: var(--surface-warm);
  border-color: var(--hairline);
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.advanced-entry.active {
  background: color-mix(in srgb, var(--accent) 6%, var(--surface-raised));
  border-color: var(--accent);
  box-shadow: var(--shadow-soft);
}

.advanced-entry.active span:first-child {
  color: var(--accent);
  font-weight: 500;
}

.advanced-entry span:first-child {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.2;
}

.advanced-entry strong {
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 24px;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.01em;
  line-height: 1;
  align-self: center;
}

.advanced-entry small {
  grid-column: 1 / -1;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin-top: 2px;
}

/* Back-to-chooser button shown after a mode is picked */
.back-to-chooser {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: -8px 0 16px;
  padding: 4px 0;
  background: transparent;
  border: 0;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--motion-fast) var(--ease-standard);
}

.back-to-chooser:hover { color: var(--accent); }

.back-to-chooser svg {
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ─── Library ────────────────────────────────────────── */

.library-tools {
  display: grid;
  gap: 16px;
  margin: 4px 0 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--hairline-soft);
}

.library-search {
  display: grid;
  gap: 8px;
}

.library-search span {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.library-search input {
  padding: 12px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--ink);
  font-family: var(--serif-en);
  font-size: 15px;
  outline: none;
}
.library-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.library-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.filter-chip {
  background: transparent;
  border: 0;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 15px;
  color: var(--muted);
  font-weight: 400;
  transition: color var(--motion-fast) var(--ease-standard);
  min-height: 0;
}

.filter-chip.active {
  color: var(--accent);
  font-style: normal;
  font-weight: 500;
  border-bottom-color: var(--accent);
}

.library-summary {
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.library-list {
  display: grid;
  gap: 0;
}

.library-card {
  display: grid;
  gap: 8px;
  padding: 18px 14px 20px;
  margin: 0 -10px;
  background: transparent;
  border: 0;
  border-radius: 14px;
  text-align: left;
  font-family: var(--font);
  color: var(--ink);
  position: relative;
  transition: background var(--motion-fast) var(--ease-standard);
}

/* Hairline separator drawn as ::before so hover background covers it */
.library-card::before {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  border-bottom: 1px solid var(--hairline-soft);
  transition: opacity var(--motion-fast) var(--ease-standard);
}

.library-card:last-child::before { display: none; }

.library-card:hover { background: var(--surface-warm); }
.library-card:hover::before { opacity: 0; }

.library-card-main {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.library-card-main > div {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.library-word {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.008em;
  color: var(--ink);
}

.library-featured {
  font-family: var(--sans-ui);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--accent-soft);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.library-meta {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.library-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.library-card small {
  display: block;
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.library-learn-button {
  justify-self: start;
  margin-top: 4px;
  padding: 6px 14px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: transparent;
  color: var(--accent);
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  transition: border-color var(--motion-fast) var(--ease-standard),
    background var(--motion-fast) var(--ease-standard);
}

.library-learn-button:hover {
  border-color: var(--accent);
  background: var(--surface-warm);
}

.library-empty {
  padding: 32px 0;
  text-align: center;
  font-family: var(--serif-en);
  font-style: italic;
  color: var(--muted);
}

/* ─── Settings drawer ─────────────────────────────────── */

.settings-drawer {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  pointer-events: none;
  visibility: hidden;
}

.settings-backdrop {
  position: fixed;
  inset: 0;
  border: 0;
  background: rgba(34, 26, 20, 0.42);
  opacity: 0;
  backdrop-filter: blur(6px);
  transition: opacity var(--motion-medium) var(--ease-standard);
}

.settings-sheet {
  position: relative;
  width: min(440px, calc(100vw - 24px));
  height: calc(100svh - 24px);
  margin: 12px auto 12px 12px;
  overflow: auto;
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-lg);
  background: var(--paper);
  box-shadow: 0 30px 80px rgba(40, 25, 10, 0.25);
  padding: 0;
  transform: translateX(calc(-100% - 18px));
  transition: transform var(--motion-slow) var(--ease-soft);
}

:root[data-color-mode="dark"] .settings-sheet {
  background: var(--paper);
  border-color: var(--hairline);
}

body.settings-open { overflow: hidden; }
body.settings-open .settings-drawer { pointer-events: auto; visibility: visible; }
body.settings-open .settings-backdrop { opacity: 1; }
body.settings-open .settings-sheet { transform: translateX(0); }

.settings-sheet-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
  padding: 20px 22px 18px;
  border-bottom: 1px solid var(--hairline-soft);
  background: color-mix(in srgb, var(--paper) 92%, white);
  backdrop-filter: blur(20px);
}

:root[data-color-mode="dark"] .settings-sheet-header {
  background: color-mix(in srgb, var(--paper) 92%, black);
}

.settings-stack {
  display: grid;
  gap: 0;
  padding: 0;
}

.settings-panel {
  padding: 22px;
  border-bottom: 1px solid var(--hairline-soft);
  background: transparent;
  box-shadow: none;
  border: 0;
  border-bottom: 1px solid var(--hairline-soft);
  border-radius: 0;
}

.settings-panel:last-child { border-bottom: 0; }

.settings-field {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.settings-field label, .field-label {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.choice-ui {
  display: grid;
  gap: 8px;
}
.choice-ui.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.choice-ui.cat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.setting-choice {
  display: grid;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--ink);
  text-align: left;
  box-shadow: none;
  transition: border-color var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard);
  min-height: 0;
}

.setting-choice:hover {
  border-color: var(--hairline);
  transform: none;
  box-shadow: none;
}

.setting-choice strong {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.2;
}

.setting-choice small {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 12.5px;
  color: var(--muted);
}

.setting-choice[aria-checked="true"] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface-raised));
  color: var(--accent);
  box-shadow: none;
}

.cat-choice {
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
}

.cat-choice-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: transparent;
}

.cat-choice .brand-logo-image,
.cat-choice .cat-logo {
  width: 40px;
  height: 40px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.theme-swatch-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.theme-swatch {
  height: 40px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--swatch, #6b4a30);
  box-shadow: inset 0 0 0 3px var(--surface-raised);
  cursor: pointer;
}

.theme-swatch[aria-pressed="true"] {
  border-color: var(--ink);
  box-shadow: inset 0 0 0 3px var(--surface-raised),
    0 0 0 2px var(--accent);
}

.hex-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  margin-top: 10px;
}

.hex-control {
  display: grid;
  gap: 6px;
}

.hex-control span {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hex-control input {
  padding: 10px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--ink);
  font-family: var(--serif-en);
  font-size: 15px;
}

.hex-row > button {
  padding: 0 16px;
  min-height: 44px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
}

.band-stepper {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  gap: 8px;
  align-items: center;
}

.stepper-button {
  min-height: 44px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-size: 18px;
  font-family: var(--serif-en);
  transition: border-color var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}

.stepper-button:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface-warm);
  transform: none;
}

.self-band-control input {
  padding: 10px 14px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--ink);
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 22px;
  text-align: center;
}

.goal-preset-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.goal-preset-row button {
  padding: 0;
  min-height: 38px;
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  transition: border-color var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}

.goal-preset-row button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ─── Quote refresh animation ────────────────────────── */

.quote-strip.is-refreshing .quote-copy {
  animation: text-swap var(--motion-medium) var(--ease-soft) both;
}

@keyframes text-swap {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.copy-swapped, .content-swapped {
  animation: content-swap var(--motion-medium) var(--ease-soft) both;
}

@keyframes content-swap {
  from { opacity: 0.6; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.choices-swapped .choice-button {
  animation: option-enter var(--motion-medium) var(--ease-soft) both;
}
.choices-swapped .choice-button:nth-child(2) { animation-delay: 35ms; }
.choices-swapped .choice-button:nth-child(3) { animation-delay: 70ms; }
.choices-swapped .choice-button:nth-child(4) { animation-delay: 105ms; }

@keyframes option-enter {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Score updated pulse ─────────────────────────────── */

.score-updated .score-ring {
  animation: score-pulse var(--motion-medium) var(--ease-soft) both;
}

@keyframes score-pulse {
  50% { transform: scale(1.015); }
}

/* ─── Scrollbar ──────────────────────────────────────── */

/* ─── Desktop / tablet — sidebar version ────────────── */

@media (min-width: 720px) {
  .app-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    min-height: 100svh;
  }

  .mobile-masthead { display: none; }

  .side-nav {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    min-height: 100svh;
    align-self: start;
    padding: 30px 16px 24px;
    background: var(--paper-soft);
    border-right: 1px solid var(--hairline-soft);
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px 26px;
    text-decoration: none;
    color: var(--ink);
  }

  .brand strong {
    font-family: var(--serif-en);
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 0.06em;
  }

  .brand small {
    display: none;
  }

  .nav-list {
    display: flex !important;
    flex-direction: column !important;
    grid-template-columns: none;
    gap: 2px;
    height: auto;
  }

  .nav-item {
    display: flex !important;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 0;
    color: var(--ink-soft);
    text-align: left;
    font-family: var(--serif-en);
    font-size: 15px;
    font-weight: 400;
    transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
  }

  .nav-item:hover {
    background: var(--surface-warm);
    color: var(--ink);
    transform: none;
    box-shadow: none;
    border: 0;
  }

  .nav-item.active {
    background: var(--surface-warm);
    color: var(--accent);
    font-weight: 500;
    border: 0;
    box-shadow: none;
  }

  .nav-item .icon { width: 18px; height: 18px; opacity: 0.8; }
  .nav-item.active .icon { opacity: 1; }

  .nav-label { font-size: 15px; font-weight: inherit; }

  .study-clock {
    display: block;
    margin-top: auto;
    padding: 14px;
    border-top: 1px solid var(--hairline-soft);
    font-family: var(--serif-en);
    font-style: italic;
    font-size: 13px;
    color: var(--muted);
  }
  .study-clock #clockText {
    display: block;
    font-style: normal;
    font-size: 17px;
    color: var(--ink);
    font-feature-settings: "tnum";
  }

  .main-app {
    padding: 34px 56px 32px;
    max-width: 760px;
  }

  .home-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1080px) {
  .app-shell {
    grid-template-columns: 248px minmax(0, 1fr);
  }

  .main-app {
    max-width: 900px;
  }

  body[data-route="home"] .home-grid {
    grid-template-columns: minmax(280px, 0.85fr) minmax(360px, 1.15fr);
    gap: 28px;
  }

  body[data-route="home"] .score-panel,
  body[data-route="home"] .home-action-panel {
    order: 0;
  }
}

/* ─── Scrollbar (restored) ────────────────────────────────── */

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--hairline);
  border-radius: 999px;
  border: 2px solid var(--paper);
}

/* ───────────────────────────────────────────────────────────
   Editorial extensions: paper texture, etymology, streak strip,
   recent words, paper-texture toggle.
   ─────────────────────────────────────────────────────────── */

/* Paper texture — subtle SVG noise overlay */
:root[data-paper-texture="on"] body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.42;
  mix-blend-mode: multiply;
  background-image: url("paper-noise.svg");
  background-size: 240px 240px;
}
:root[data-color-mode="dark"][data-paper-texture="on"] body::before {
  opacity: 0.55;
  mix-blend-mode: overlay;
}

/* ─── Etymology block (Learn page) ─────────────────── */

.etymology-block {
  margin: 22px 0 0;
  padding: 22px 0 4px;
  border-top: 1px solid var(--hairline-soft);
}

.etymology-block h3 {
  margin: 0 0 14px;
  font-family: var(--sans-ui);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.etym-equation {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--serif-en);
  font-size: 20px;
  line-height: 1.3;
}

.etym-part {
  color: var(--accent);
  font-weight: 500;
}

.etym-part.etym-italic {
  font-style: italic;
  color: var(--ink);
  font-weight: 400;
}

.etym-plus,
.etym-arrow {
  color: var(--muted);
  font-style: italic;
  font-size: 16px;
}

.etym-result {
  font-style: italic;
  color: var(--ink);
}

.etym-glossary {
  display: grid;
  gap: 8px;
}

.etym-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-family: var(--serif-en);
  font-size: 14px;
  line-height: 1.6;
}

.etym-key {
  color: var(--accent);
  font-weight: 500;
  min-width: 80px;
  flex: 0 0 auto;
}

.etym-key.etym-italic {
  font-style: italic;
  color: var(--ink);
  font-weight: 400;
}

.etym-meaning {
  font-style: italic;
  color: var(--muted);
}

/* ─── Streak strip + Recent words (Home page) ─────── */

.streak-block,
.recent-block {
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--hairline-soft);
}

.section-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 18px;
  gap: 12px;
  flex-wrap: wrap;
}

.section-row .eyebrow {
  font-family: var(--sans-ui);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-row .section-meta {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
}

.section-row .section-meta strong {
  font-style: normal;
  font-weight: 500;
  color: var(--accent);
  font-feature-settings: "tnum", "onum";
}

.streak-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.streak-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 4px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid transparent;
  transition: background var(--motion-fast) var(--ease-standard);
}

.streak-cell.is-today {
  background: var(--surface-warm);
  border-color: var(--hairline);
}

.streak-day {
  font-family: var(--sans-ui);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.streak-date {
  font-family: var(--font-display);
  font-feature-settings: "tnum", "onum";
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1;
  letter-spacing: -0.01em;
}

.streak-cell.is-today .streak-date {
  color: var(--accent);
}

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

.streak-cell.is-met .streak-dot {
  background: var(--accent);
}

.streak-cell.is-today:not(.is-met) .streak-dot {
  background: var(--accent-soft);
}

/* ─── Recent words ─────────────────────────────────── */

.recent-list {
  display: grid;
  gap: 0;
}

.recent-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 4px;
  border: 0;
  border-bottom: 1px solid var(--hairline-soft);
  background: transparent;
  color: var(--ink);
  text-align: left;
  font-family: var(--font);
  cursor: pointer;
  transition: background var(--motion-fast) var(--ease-standard);
  border-radius: 0;
  width: 100%;
  min-width: 0;
}

.recent-item:last-child { border-bottom: 0; }

.recent-item:hover {
  background: var(--surface-warm);
  transform: none;
}

.recent-word {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.005em;
  min-width: 0;
  overflow-wrap: anywhere;
}

.recent-phonetic {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 12.5px;
  color: var(--muted);
  margin-left: 10px;
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}

.recent-time {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
}

.recent-all {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
  background: transparent;
  border: 0;
  padding: 0;
  letter-spacing: 0.01em;
  transition: color var(--motion-fast) var(--ease-standard);
  cursor: pointer;
}

.recent-all:hover { color: var(--accent); }

/* ─── Paper-texture toggle (settings) ──────────────── */

.setting-toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--ink-soft);
  text-align: left;
  min-height: 50px;
  width: 100%;
  transition: border-color var(--motion-fast) var(--ease-standard),
    background var(--motion-fast) var(--ease-standard),
    color var(--motion-fast) var(--ease-standard);
  cursor: pointer;
}

.setting-toggle:hover {
  border-color: var(--hairline);
}

.setting-toggle .toggle-thumb {
  position: relative;
  width: 38px;
  height: 22px;
  border-radius: 999px;
  background: var(--hairline);
  flex: 0 0 38px;
  transition: background var(--motion-medium) var(--ease-standard);
}

.setting-toggle .toggle-thumb::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--paper);
  transition: transform var(--motion-medium) var(--ease-soft);
  box-shadow: 0 1px 3px rgba(60, 40, 20, 0.18);
}

.setting-toggle[aria-pressed="true"] {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface-raised));
  color: var(--accent);
}

.setting-toggle[aria-pressed="true"] .toggle-thumb {
  background: var(--accent);
}

.setting-toggle[aria-pressed="true"] .toggle-thumb::before {
  transform: translateX(16px);
}

.setting-toggle .toggle-label {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 400;
}

/* ─── Spelling slots (character display) ─────────────────── */

/* Wrapper that pairs slots + hidden input */
.spelling-entry {
  position: relative;
  margin: 12px 0 6px;
}

/* Hidden but focusable input — keyboard works, visual goes to slots */
.spelling-input-hidden {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  border: 0;
  background: transparent;
  font-size: 16px; /* avoid iOS zoom */
  caret-color: transparent;
  padding: 0;
  margin: 0;
}

.spelling-slots {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 4px;
  align-items: flex-end;
  cursor: text;
  border-radius: 8px;
  transition: background var(--motion-fast) var(--ease-standard);
}

.spelling-entry:focus-within .spelling-slots {
  background: color-mix(in srgb, var(--accent) 4%, transparent);
}

.spelling-slots:focus { outline: none; }

.spelling-slot {
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  min-width: 22px;
  height: 38px;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--hairline);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
  text-transform: lowercase;
  transition: border-color var(--motion-fast) var(--ease-standard),
    color var(--motion-fast) var(--ease-standard);
}

.spelling-slot.is-filled {
  border-bottom-color: var(--ink);
  color: var(--ink);
}

.spelling-slot.is-hint {
  color: var(--muted);
  border-bottom-color: var(--accent-soft);
  font-style: italic;
}

/* Active caret indicator on next-to-fill slot */
.spelling-entry:focus-within .spelling-slot.is-caret {
  border-bottom-color: var(--accent);
}

.spelling-slot.is-space {
  width: 14px;
  border-bottom-color: transparent;
}

/* ─── Aux action row (hint + skip) ───────────────────────── */

.spelling-aux-actions {
  display: flex;
  gap: 10px;
  margin: 14px 0 6px;
}

.spelling-aux-actions .ghost-action {
  flex: 1;
  min-height: 44px;
  font-size: 14px;
}