[hidden] { display: none !important; }
/* ===== Shared layout (all themes). Theme values live in themes.css. ===== */
* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0; min-height: 100vh; color: var(--text); background: var(--bg);
  font: 14px/1.55 var(--font-ui);
}
html.theme-ready body { transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease); }
.bg-fx { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
a { color: var(--primary-text); }
.muted { color: var(--muted); }

/* Top bar and tabs */
.topbar {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  padding: 10px 24px; background: var(--topbar-bg); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: var(--weight-strong); font-size: 17px; }
.brand-mark {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: var(--radius);
  background: var(--primary); color: var(--primary-ink); font-size: 14px;
}
.tabs { position: relative; display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--surface-2); }
.tabs a {
  position: relative; z-index: 1; padding: 6px 14px; border-radius: 999px; color: var(--muted);
  text-decoration: none; font-weight: 500; transition: color var(--dur) var(--ease);
}
.tabs a.active { color: var(--primary-ink); }
.tab-indicator {
  position: absolute; top: 4px; left: 0; height: calc(100% - 8px); border-radius: 999px; background: var(--primary);
}
.tab-indicator.ready { transition: transform calc(var(--dur) * 1.6) var(--ease), width calc(var(--dur) * 1.6) var(--ease); }

/* Stats strip */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px;
  max-width: 1200px; margin: 16px auto 0; padding: 0 24px;
}
.stat {
  display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow);
}
.stat-head { display: flex; align-items: center; gap: 6px; }
.stat-num { font-size: 22px; font-weight: var(--weight-strong); font-variant-numeric: tabular-nums; }
.stat-label { font-size: 12px; color: var(--muted); }
.goal-bar { height: 6px; border-radius: 999px; background: var(--surface-2); overflow: hidden; margin-top: 6px; }
.goal-bar > i { display: block; height: 100%; width: calc(var(--p, 0) * 100%); background: var(--primary); transition: width .6s var(--ease); }
.ring { display: none; }
.goal-done { display: none; color: var(--good); font-weight: var(--weight-strong); font-size: 12px; }
.stat.goal.reached .goal-done { display: inline; }
.bars { display: flex; align-items: flex-end; gap: 4px; height: 34px; margin-top: 4px; }
.bars > i {
  flex: 1; min-height: 3px; height: calc(var(--h, 0) * 100%); border-radius: 3px 3px 0 0;
  background: var(--accent-1); opacity: .85; transition: height .6s var(--ease);
}
.bars > i.today { background: var(--primary); opacity: 1; }

/* Main area */
main { max-width: 1200px; margin: 0 auto; padding: 16px 24px 48px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); }

/* Controls */
button, label.button {
  font: inherit; cursor: pointer; color: var(--text); background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 6px 12px;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
button:hover, label.button:hover { border-color: var(--primary); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); font-weight: var(--weight-strong); }
button.danger { color: var(--bad); }
button.link { border: none; background: none; color: var(--primary-text); padding: 0 4px; box-shadow: none; }
input[type=search], input[type=password], input[type=number], input[type=text], select {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 6px 10px;
}
input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.chip {
  display: inline-block; font-size: 11.5px; line-height: 1.7; border-radius: 999px; padding: 0 7px; margin: 1px 4px 1px 0;
  background: var(--primary-soft); color: var(--primary-text);
  /* Never wrap inside a chip: long names are truncated (full name in the title tooltip). */
  white-space: nowrap; max-width: 10em; overflow: hidden; text-overflow: ellipsis; vertical-align: middle;
}

/* Toggle switch: native checkbox styled as a switch */
.settings input[type=checkbox], .quiz-setup input[type=checkbox] {
  appearance: none; position: relative; flex: none; width: 38px; height: 22px; margin: 0 8px 0 0;
  border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}
.settings input[type=checkbox]::after, .quiz-setup input[type=checkbox]::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--surface); box-shadow: 0 1px 2px rgba(0,0,0,.3); transition: transform var(--dur) var(--ease);
}
.settings input[type=checkbox]:checked, .quiz-setup input[type=checkbox]:checked { background: var(--primary); border-color: var(--primary); }
.settings input[type=checkbox]:checked::after, .quiz-setup input[type=checkbox]:checked::after { transform: translateX(16px); }

/* Vocabulary */
.vocab { display: grid; grid-template-columns: 250px 1fr; gap: 16px; }
.sidebar { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 8px; align-self: start; position: sticky; top: 72px; }
.sidebar h3 { font-size: 12px; color: var(--muted); margin: 12px 8px 4px; display: flex; justify-content: space-between; text-transform: uppercase; letter-spacing: .04em; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { display: flex; align-items: center; gap: 6px; padding: 6px 8px; border-radius: var(--radius); cursor: pointer; transition: background-color var(--dur) var(--ease); }
.sidebar li:hover { background: var(--surface-2); }
.sidebar li.active { background: var(--primary-soft); color: var(--primary-text); font-weight: 600; }
.sidebar li > span:first-child { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar .count { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.tag-actions { display: none; gap: 2px; align-items: center; }
.sidebar li:hover .tag-actions, .sidebar li:focus-within .tag-actions { display: inline-flex; }
.tag-actions input[type=color] { width: 18px; height: 18px; padding: 0; border: none; background: none; }
.backup { display: flex; gap: 6px; margin: 12px 8px 4px; flex-wrap: wrap; }
.content { min-width: 0; }
.toolbar { display: flex; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.toolbar input[type=search] { flex: 1; min-width: 180px; }
.batch { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
table.words { width: 100%; border-collapse: separate; border-spacing: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow: hidden; }
table.words th { text-align: left; font-size: 12px; color: var(--muted); font-weight: 600; background: var(--surface-2); }
table.words th, table.words td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.words tbody tr:last-child td { border-bottom: none; }
table.words tbody tr:not(.detail) { cursor: pointer; transition: background-color var(--dur) var(--ease); }
table.words tbody tr:not(.detail):hover { background: var(--surface-2); }
tr.expanded { background: var(--primary-soft); }
tr.detail > td { background: var(--surface-2); animation: slide-down calc(var(--dur) * 1.6) var(--ease); }
/* Mastery levels ramp from each theme's "bad" to "good" colour; the filled-segment count carries the level too. */
.lv-new { --lv: var(--bad); } .lv-learning { --lv: var(--warn); }
.lv-shaky { --lv: color-mix(in srgb, var(--warn) 55%, var(--good)); }
.lv-familiar { --lv: color-mix(in srgb, var(--warn) 20%, var(--good)); } .lv-mastered { --lv: var(--good); }
.level { display: inline-flex; gap: 2px; vertical-align: middle; }
.level i { width: 4px; height: 12px; border-radius: 1px; background: var(--line); }
.level i.on { background: var(--lv); }
.level-badge { display: inline-flex; align-items: center; gap: 3px; margin-right: 8px; vertical-align: middle; }
.struggling { color: var(--warn); font-size: 12px; }
.mastery-dist { display: flex; height: 8px; margin: 2px 8px 6px; border-radius: 999px; overflow: hidden; background: var(--line); }
.mastery-dist > span { background: var(--lv); min-width: 3px; }
.word-detail .study { margin: 0 0 6px; }
.word-detail .study .level { margin-right: 2px; }
.due-badge {
  display: inline-block; font-size: 11.5px; line-height: 1.7; padding: 0 7px; border-radius: 999px;
  background: var(--surface-2); color: var(--muted); white-space: nowrap; vertical-align: middle;
}
.due-badge.now { background: var(--bad-soft); color: var(--bad); font-weight: 600; }
.word-detail h4 { margin: 10px 0 2px; font-size: 12px; color: var(--muted); }
.word-detail ul { margin: 0; padding-left: 18px; }
.word-detail .example { color: var(--muted); font-style: italic; }
.word-detail .context { background: var(--warn-soft); border-left: 3px solid var(--warn); padding: 4px 8px; border-radius: 0 var(--radius) var(--radius) 0; }
.occurrences li { margin-bottom: 6px; }
.detail-actions { float: right; }
.word-editor h4 { margin: 12px 0 4px; font-size: 12px; color: var(--muted); }
.word-editor .edit-rows { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.word-editor .edit-row { display: flex; gap: 6px; align-items: flex-start; width: 100%; }
.word-editor .edit-row > .muted { padding-top: 6px; white-space: nowrap; }
.word-editor .grow { flex: 1; min-width: 0; }
.word-editor .stack { display: flex; flex-direction: column; gap: 4px; }
.word-editor input.pos { width: 5.5em; flex: none; }
.word-editor input.example { font-style: italic; }
.word-editor textarea {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 6px 8px; resize: vertical; width: 100%; box-sizing: border-box;
}
.word-editor textarea:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.word-editor .stack input, .word-editor input.grow { width: 100%; box-sizing: border-box; }
.word-editor .edit-row button.link { padding-top: 6px; }
.word-editor .edit-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.word-editor .small { font-size: 11.5px; }

/* Empty states */
.empty { color: var(--muted); padding: 40px 24px; text-align: center; }
.empty-emoji { font-size: 44px; line-height: 1; margin-bottom: 8px; }

/* Review */
.review-header { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.review-stage { perspective: 1200px; }
.review-card { max-width: 680px; margin: 0 auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 28px; }
.review-card.empty { text-align: center; color: var(--muted); }
.review-card .big { font-size: 36px; font-weight: var(--weight-strong); }
.review-card .sentence { font-size: 17px; }
.review-back { animation: card-fade calc(var(--dur) * 2) var(--ease); }
.ratings { display: flex; gap: 12px; justify-content: center; margin-top: 16px; flex-wrap: wrap; }
.rate { min-width: 104px; padding: 10px; font-weight: 600; }
.rate.again { border-color: var(--bad); color: var(--bad); }
.rate.hard { border-color: var(--warn); color: var(--warn); }
.rate.good { border-color: var(--good); color: var(--good); }

/* Settings */
.settings-page { display: grid; gap: 16px; max-width: 720px; margin: 0 auto; }
.settings { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 16px 24px; }
.settings h2 { font-size: 16px; margin: 4px 0 8px; }
.settings label { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; }
.settings label.row { flex-direction: row; align-items: center; }
.excluded-sites { list-style: none; margin: 0; padding: 0; }
.excluded-sites li { display: flex; justify-content: space-between; align-items: center; padding: 4px 0; border-bottom: 1px solid var(--line); }
.theme-picker { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.theme-tile { display: flex; flex-direction: column; gap: 8px; padding: 10px; text-align: left; border-width: 2px; border-radius: var(--radius-lg); }
.theme-tile.selected { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.theme-tile .preview { height: 64px; border-radius: 8px; display: flex; align-items: flex-end; gap: 6px; padding: 8px; }
.theme-tile .preview i { display: block; height: 14px; border-radius: 4px; }
/* Fixed preview colours, independent of the active theme */
.preview.minimal { background: #f7f8fa; border: 1px solid #e3e6ea; }
.preview.minimal i:nth-child(1) { width: 40%; background: #2563eb; } .preview.minimal i:nth-child(2) { width: 25%; background: #d0d7de; }
.preview.playful { background: #fff9ef; border: 1px solid #f0e2c8; }
.preview.playful i:nth-child(1) { width: 40%; background: #58cc02; box-shadow: 0 3px 0 #46a302; } .preview.playful i:nth-child(2) { width: 25%; background: #1cb0f6; box-shadow: 0 3px 0 #1899d6; }
.preview.neon { background: #070a14; border: 1px solid rgba(34, 211, 238, .4); }
.preview.neon i:nth-child(1) { width: 40%; background: #22d3ee; box-shadow: 0 0 10px #22d3ee; } .preview.neon i:nth-child(2) { width: 25%; background: #f472b6; box-shadow: 0 0 10px #f472b6; }
.preview.morandi { background: linear-gradient(135deg, #f1ede6, #e8e2d8); border: 1px solid #ddd5ca; }
.preview.morandi i:nth-child(1) { width: 40%; background: #627585; } .preview.morandi i:nth-child(2) { width: 25%; background: #c9a5a0; }
.theme-tile .tile-name { font-weight: 600; }

/* Quiz (existing structure; colours now themed) */
.quiz { max-width: 780px; margin: 0 auto; }
.quiz-setup { max-width: none; }
.quiz-setup p.hint { margin: -6px 0 6px; font-size: 12px; }
.quiz-start { display: flex; gap: 12px; align-items: center; margin-top: 12px; flex-wrap: wrap; }
.quiz-top { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.quiz-progress { flex: 1; height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.quiz-progress .bar { height: 100%; background: var(--primary); transition: width .4s var(--ease); }
.combo { font-weight: 700; color: var(--warn); min-width: 6em; text-align: right; display: inline-block; }
.combo.bump { animation: quiz-pop .35s ease; }
.quiz-card { position: relative; }
.quiz-actions { display: flex; gap: 10px; align-items: center; margin: 8px 0; flex-wrap: wrap; }
.quiz-sentence { font-size: 20px; line-height: 2.3; margin: 12px 0; }
.blank {
  font: inherit; font-size: 18px; padding: 0 4px; margin: 0 2px; border: none; border-bottom: 2px solid var(--primary);
  background: var(--primary-soft); border-radius: 4px 4px 0 0; text-align: center; color: var(--text);
}
.blank:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.blank-choice { cursor: pointer; color: var(--muted); }
.blank-choice.filled { color: var(--text); }
.blank-choice.active { outline: 2px solid var(--primary); outline-offset: 1px; }
.blank.correct { background: var(--good-soft); border-color: var(--good); color: var(--good); animation: quiz-pop .35s ease; }
.blank.close { background: var(--warn-soft); border-color: var(--warn); color: var(--warn); animation: quiz-pop .35s ease; }
.blank.wrong { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); text-decoration: line-through; animation: quiz-shake .4s ease; }
.blank:disabled { opacity: 1; cursor: default; }
.fix { color: var(--good); font-weight: 700; margin: 0 4px 0 2px; display: inline-block; animation: quiz-slide .3s ease; }
.quiz-choices { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; min-height: 2.2em; }
.choice { padding: 6px 14px; border-radius: 999px; }
.choice:hover { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-text); }
.quiz-feedback { margin-top: 8px; }
.float { position: absolute; right: 24px; top: 12px; font-size: 26px; font-weight: 800; color: var(--good); pointer-events: none; animation: quiz-float .9s ease forwards; }
.quiz-summary { text-align: center; }
.quiz-summary ul { text-align: left; }
.quiz-score-row { display: flex; justify-content: center; align-items: center; gap: 28px; margin: 8px 0 16px; }
.quiz-score { font-size: 64px; font-weight: 800; min-width: 2.2em; }
.stamp {
  display: inline-block; font-size: 52px; font-weight: 900; width: 96px; height: 96px; line-height: 84px;
  border: 6px solid currentColor; border-radius: 50%; transform: rotate(-12deg);
  animation: quiz-stamp .5s cubic-bezier(.2, 1.6, .4, 1) .9s both;
}
.grade-S { color: var(--accent-3); } .grade-A { color: var(--good); } .grade-B { color: var(--accent-1); }
.grade-C { color: var(--accent-4); } .grade-D { color: var(--muted); }
.quiz-stats { color: var(--muted); margin-bottom: 12px; }
.rate-chips { display: inline-flex; gap: 4px; }
.rate-chip { padding: 2px 8px; border-radius: 999px; font-size: 12px; color: var(--muted); }
.rate-chip.active { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }

/* Keyframes */
@keyframes quiz-pop { 0% { transform: scale(1); } 40% { transform: scale(1.25); } 100% { transform: scale(1); } }
@keyframes quiz-shake { 0%, 100% { transform: translateX(0); } 20%, 60% { transform: translateX(-6px); } 40%, 80% { transform: translateX(6px); } }
@keyframes quiz-slide { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@keyframes quiz-float { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-40px); } }
@keyframes quiz-stamp { from { opacity: 0; transform: rotate(-12deg) scale(2.5); } to { opacity: 1; transform: rotate(-12deg) scale(1); } }
@keyframes slide-down { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@keyframes card-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes card-flip { from { opacity: 0; transform: perspective(1200px) rotateY(-90deg); } to { opacity: 1; transform: perspective(1200px) rotateY(0); } }

/* Narrow windows */
@media (max-width: 800px) {
  .vocab { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .topbar { padding: 10px 16px; }
  main, .stats { padding-left: 16px; padding-right: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-property: color, background-color, border-color !important; }
}

/* Cloud sync */
.sync-notice {
  position: fixed; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 50;
  display: flex; gap: 10px; align-items: center; padding: 8px 10px 8px 14px; max-width: calc(100vw - 32px);
  background: var(--surface); color: var(--text); border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-hover);
}
.sync-status { margin: 4px 0 10px; }
.sync-status .bad { color: var(--bad); }
.sync-actions { display: flex; gap: 8px; flex-wrap: wrap; }