:root {
  --bg: #eef2f7;
  --ink: #0f172a;
  --muted: #64748b;
  --panel: rgba(255,255,255,.88);
  --panel-strong: #ffffff;
  --line: rgba(15,23,42,.11);
  --accent: #0f766e;
  --accent-soft: rgba(15,118,110,.11);
  --accent-2: #ca8a04;
  --good: #16a34a;
  --good-soft: rgba(22,163,74,.12);
  --bad: #dc2626;
  --bad-soft: rgba(220,38,38,.12);
  --warning: #b45309;
  --warning-soft: rgba(245,158,11,.16);
  --shadow: 0 22px 70px rgba(15,23,42,.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { min-height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(15,118,110,.11) 0 18%, transparent 18% 100%),
    radial-gradient(circle at 90% 6%, rgba(202,138,4,.14), transparent 26rem),
    linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
}

body.in-quiz { overflow-x: hidden; }

button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .76; }

.app-shell {
  width: min(1180px, 100% - 32px);
  margin: 0 auto;
  padding: 24px 0 42px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 30px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .14em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 8px;
  font-size: clamp(2.2rem, 6vw, 5.2rem);
  line-height: .95;
  letter-spacing: -.07em;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  letter-spacing: -.03em;
}

.subtitle {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.hero-stats {
  min-width: 240px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.hero-stats div,
.metric-card,
.scoreboard div {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px;
  background: rgba(255,255,255,.76);
}

.hero-stats strong,
.metric-card strong,
.scoreboard strong {
  display: block;
  font-size: 1.65rem;
  line-height: 1;
  letter-spacing: -.04em;
}

.hero-stats span,
.metric-card span,
.scoreboard span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: .82rem;
}

.dashboard {
  margin-top: 18px;
  padding: 24px;
}

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

.compact-row { margin-bottom: 14px; }

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

.level-dashboard {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.level-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 14px;
  background: rgba(255,255,255,.72);
}

.level-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.level-card-head strong { font-size: 1.15rem; }
.level-card-head span { color: var(--accent); font-weight: 900; }
.level-card p { margin: 8px 0 0; color: var(--muted); font-size: .86rem; }

.mini-track,
.progress-track {
  overflow: hidden;
  border-radius: 999px;
  background: rgba(15,23,42,.08);
}

.mini-track { height: 8px; }
.progress-track { height: 9px; margin-top: 10px; }

.mini-track span,
.progress-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .25s ease;
}

.layout {
  display: grid;
  grid-template-columns: 390px 1fr;
  gap: 18px;
  align-items: start;
  margin-top: 18px;
}

.controls,
.search-panel { padding: 24px; }
.controls { position: sticky; top: 18px; }

.control-block { margin-top: 18px; }
.label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: .86rem;
  font-weight: 800;
}

select, input[type="search"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fff;
  outline: none;
}

select:focus, input[type="search"]:focus {
  border-color: rgba(37,99,235,.55);
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}

.two-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

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

.level-pill {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px;
  background: #fff;
  display: grid;
  gap: 4px;
  font-weight: 900;
}

.level-pill small { color: var(--muted); font-weight: 700; }
.level-pill input { accent-color: var(--accent); }

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 800;
}
.switch input { accent-color: var(--accent); }

.primary, .secondary, .link-button {
  border: 0;
  border-radius: 16px;
  font-weight: 900;
}

.primary {
  width: 100%;
  margin-top: 18px;
  padding: 14px 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 18px 42px rgba(37,99,235,.22);
}

.secondary {
  padding: 12px 16px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.link-button {
  padding: 0;
  color: var(--accent);
  background: transparent;
}

.hint-text {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.5;
}
.hint-text.compact { margin-top: 8px; }
.legal-mini {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
  font-size: .82rem;
}

.legal-links a,
.simple-page a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 800;
}
.legal-links a:hover,
.simple-page a:hover { text-decoration: underline; }

.search-results {
  margin-top: 12px;
  display: grid;
  gap: 10px;
  max-height: 620px;
  overflow: auto;
  padding-right: 4px;
}

.search-item {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 12px 14px;
  background: rgba(255,255,255,.78);
  font-size: .92rem;
}
.search-head { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.search-item b { font-size: 1.35rem; }
.search-item span { color: var(--muted); }
.search-item .meaning-line { display: block; margin: 4px 0; }

.quiz-view {
  min-height: 100dvh;
  width: min(980px, 100% - 20px);
  margin: 0 auto;
  padding: max(10px, env(safe-area-inset-top)) 0 max(14px, env(safe-area-inset-bottom));
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 10px;
}

.quiz-header {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 22px;
}

.back-button { white-space: nowrap; }
.quiz-header-main { min-width: 0; }
.card-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.topline-left { display: flex; align-items: center; gap: 8px; min-width: 0; }

.badge,
.progress-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 900;
}
.badge { color: #fff; background: var(--ink); }
.progress-badge { color: var(--ink); background: rgba(15,23,42,.07); border: 1px solid var(--line); }
.muted { color: var(--muted); font-size: .88rem; text-align: right; }

.quiz-stage {
  min-height: 0;
  display: grid;
  place-items: start center;
}

.quiz-card {
  width: 100%;
  padding: clamp(12px, 2.5vw, 24px);
  border-radius: 24px;
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.compact-scoreboard { margin-bottom: 12px; }
.scoreboard div { padding: 11px 12px; border-radius: 16px; }
.scoreboard strong { font-size: 1.3rem; }
.scoreboard span { font-size: .76rem; margin-top: 3px; }

.question-text {
  min-height: clamp(96px, 23dvh, 180px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: clamp(12px, 2vw, 18px);
  font-size: clamp(3rem, 15vw, 7rem);
  font-weight: 950;
  letter-spacing: -.06em;
  line-height: 1;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--line);
}

.question-text.meaning {
  font-size: clamp(1.15rem, 4.8vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -.02em;
}

.question-sub {
  margin: 10px 0 12px;
  color: var(--muted);
  text-align: center;
  font-size: .9rem;
}

.options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.option {
  min-height: 64px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  color: var(--ink);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.35;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}

.option strong {
  min-width: 1.6rem;
  color: var(--accent);
}

.option:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: rgba(37,99,235,.45);
  background: var(--accent-soft);
}

.option.correct { border-color: rgba(22,163,74,.75); background: var(--good-soft); }
.option.wrong { border-color: rgba(220,38,38,.75); background: var(--bad-soft); }

.feedback {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 12px 14px;
  background: rgba(255,255,255,.84);
  line-height: 1.55;
  font-size: .92rem;
  max-height: 28dvh;
  overflow: auto;
}
.feedback strong { color: var(--accent); }
.feedback.good { border-color: rgba(22,163,74,.55); background: var(--good-soft); }
.feedback.bad { border-color: rgba(220,38,38,.55); background: var(--bad-soft); }
.feedback.warning { border-color: rgba(180,83,9,.55); background: var(--warning-soft); }
.hidden { display: none; }

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 12px;
}
.actions .primary { width: auto; margin-top: 0; }

.simple-page {
  max-width: 920px;
}
.simple-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.simple-header h1 { font-size: clamp(2rem, 6vw, 4rem); }
.simple-content { padding: 28px; line-height: 1.75; }
.simple-content h2 { margin-top: 28px; }
.simple-content p,
.simple-content li { color: var(--muted); }
.simple-content code {
  color: var(--ink);
  background: rgba(15,23,42,.06);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 2px 6px;
}

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .controls { position: static; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .level-dashboard { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .app-shell { width: min(100% - 20px, 1180px); padding: 10px 0 22px; }
  .hero { grid-template-columns: 1fr; padding: 20px; border-radius: 22px; }
  .hero-stats { min-width: 0; }
  .dashboard, .controls, .search-panel { padding: 18px; border-radius: 22px; }
  .section-title-row { align-items: flex-start; flex-direction: column; }
  .pill-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .two-cols { grid-template-columns: 1fr; }
  .quiz-header { grid-template-columns: 1fr; }
  .back-button { width: 100%; }
  .scoreboard { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .scoreboard div { padding: 8px; }
  .scoreboard strong { font-size: 1.05rem; }
  .scoreboard span { font-size: .68rem; }
  .options { grid-template-columns: 1fr; gap: 8px; }
  .option { min-height: 54px; padding: 10px 12px; border-radius: 15px; }
  .actions { display: grid; grid-template-columns: 1fr 1fr; }
  .actions .primary, .actions .secondary { width: 100%; }
  .question-sub { font-size: .82rem; }
}

@media (max-width: 420px) {
  .metric-grid, .level-dashboard { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .scoreboard { grid-template-columns: repeat(2, 1fr); }
  .question-text { min-height: 86px; }
  .question-text.meaning { font-size: clamp(1rem, 5vw, 1.55rem); }
}


.publish-note {
  margin-top: 18px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-radius: 22px;
}
.publish-note strong { font-size: .98rem; }
.publish-note span { color: var(--muted); line-height: 1.55; }

.site-footer {
  width: min(1180px, 100% - 32px);
  margin: -18px auto 30px;
  color: var(--muted);
  text-align: center;
  font-size: .86rem;
  line-height: 1.6;
}

noscript {
  display: block;
  width: min(920px, 100% - 32px);
  margin: 18px auto;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  color: var(--bad);
  font-weight: 800;
}

.simple-kicker {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(255,255,255,.72);
  color: var(--muted);
  font-size: .82rem;
  font-weight: 800;
}

@media (max-width: 720px) {
  .publish-note { align-items: flex-start; flex-direction: column; padding: 14px 16px; }
  .site-footer { width: min(100% - 20px, 1180px); margin-bottom: 22px; }
}