/* ==========================================
   Bloom Quiz — unified stylesheet
   Two themes: English (rose) / French (lavender)
   ========================================== */

/* ===== Theme tokens ===== */
body[data-lang="en"] {
  --bg-dark: #1b0f22;
  --bg-mid: #2c1431;

  --primary: #e0489b;
  --primary-light: #f472b6;
  --primary-dark: #b32e78;
  --accent: #ffb6d5;
  --accent-light: #ffd6e7;

  --text-primary: #fdf3f8;
  --text-secondary: #d9b8ca;
  --border: #4d2b58;

  --level-bg: #3a1f42;
  --tab-active: #e0489b;
  --box-bg: #351b3e;
  --box-bg-2: #2c1634;
  --box-bg-hover: #482553;
  --box-border: #4f2e5b;
  --box-text: #f6e6ef;
  --box-text-dim: #e2c8d8;

  --badge-bg: #ffc2dd;
  --badge-text: #40102a;
  --title-gold: #ffb6d5;

  --glow: rgba(224, 72, 155, 0.32);
  --glow-soft: rgba(224, 72, 155, 0.14);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.45);
}

body[data-lang="fr"] {
  --bg-dark: #120e24;
  --bg-mid: #1e1638;

  --primary: #8b5cf6;
  --primary-light: #a78bfa;
  --primary-dark: #6d3fe0;
  --accent: #d6c2ff;
  --accent-light: #e9ddff;

  --text-primary: #f6f2ff;
  --text-secondary: #c3b4e0;
  --border: #3e2d5e;

  --level-bg: #2c2048;
  --tab-active: #8b5cf6;
  --box-bg: #291d45;
  --box-bg-2: #231838;
  --box-bg-hover: #382757;
  --box-border: #42305f;
  --box-text: #efe8ff;
  --box-text-dim: #d5c9ec;

  --badge-bg: #d6c2ff;
  --badge-text: #241041;
  --title-gold: #d6c2ff;

  --glow: rgba(139, 92, 246, 0.34);
  --glow-soft: rgba(139, 92, 246, 0.16);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.5);
}

/* ===== Base ===== */
* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  direction: ltr;
  font-family: 'Quicksand', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
  color: var(--text-primary);
  background:
    radial-gradient(900px 420px at 50% -10%, var(--glow-soft), transparent 70%),
    linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
  background-attachment: fixed;
  transition: background 0.45s ease;
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { color: var(--accent-light); }

::selection { background: var(--primary); color: #fff; }

:focus-visible {
  outline: 2px solid var(--title-gold);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ===== Header ===== */
.site-header {
  position: relative;
  background: linear-gradient(135deg, var(--box-bg) 0%, var(--box-bg-hover) 100%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  padding: 38px 20px 0;
  transition: background 0.45s ease, border-color 0.45s ease;
}

.site-header::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, var(--glow-soft) 0%, transparent 70%);
  pointer-events: none;
  transition: background 0.45s ease;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 320px;
  height: 220px;
  background: radial-gradient(ellipse, var(--glow-soft) 0%, transparent 70%);
  pointer-events: none;
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
  padding-bottom: 22px;
}

.brand-sub {
  color: var(--accent);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 5px;
  text-transform: uppercase;
  margin-bottom: 10px;
  text-shadow: 0 0 30px var(--glow);
}

.brand-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.2px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-divider {
  width: 60%;
  height: 5px;
  background: linear-gradient(90deg, transparent, var(--title-gold) 45%, #fff 50%, var(--title-gold) 55%, transparent);
  margin: 22px auto 0;
  border-radius: 3px;
  box-shadow: 0 0 14px var(--glow), 0 0 34px var(--glow);
}

/* ===== Share bar ===== */
.share-bar {
  width: 100%;
  background: linear-gradient(90deg, var(--box-bg) 0%, var(--box-bg-hover) 100%);
  border-bottom: 1px solid var(--border);
  padding: 9px 0;
  transition: background 0.45s ease;
}

.share-bar-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 0 20px;
}

.share-bar-text {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
}

.share-bar-icons { display: flex; gap: 8px; }

.share-bar-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  border: none;
  padding: 0;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.share-bar-btn:hover { transform: scale(1.14); color: #fff; }
.share-bar-btn.copied { box-shadow: 0 0 0 2px var(--title-gold), 0 0 12px var(--glow); }

.share-whatsapp { background: #25d366; }
.share-telegram { background: #0088cc; }
.share-facebook { background: #1877f2; }
.share-copy { background: var(--box-bg-hover); border: 1px solid var(--box-border); }

/* ===== Page content ===== */
.page-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 40px;
}

/* Centred board that holds tabs + sets */
.board {
  max-width: 900px;
  margin: 0 auto;
}

/* ===== Language tabs ===== */
.lang-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 6px;
}

.lang-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--box-bg);
  color: var(--box-text-dim);
  border: 1px solid var(--box-border);
  border-radius: 12px;
  padding: 15px 10px;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.3px;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.lang-btn .flag {
  font-size: 18px;
  line-height: 1;
}

.lang-btn:hover {
  background: var(--box-bg-hover);
  color: #fff;
  transform: translateY(-1px);
}

.lang-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 8px 22px -6px var(--glow);
}

/* ===== Divider ===== */
.gold-divider {
  width: 60%;
  height: 5px;
  border-radius: 3px;
  margin: 24px auto 20px;
  background: linear-gradient(90deg, transparent 0%, var(--title-gold) 45%, #fff 50%, var(--title-gold) 55%, transparent 100%);
  box-shadow: 0 0 14px var(--glow), 0 0 34px var(--glow);
}

/* ===== Section title ===== */
.semester-title {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--title-gold);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.4px;
  margin: 0 0 14px;
}

.semester-title::before {
  content: '';
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: var(--title-gold);
  flex-shrink: 0;
  box-shadow: 0 0 10px var(--glow);
}

/* ===== Letter sets grid ===== */
.sets-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.letter-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  aspect-ratio: 1 / 1;
  padding: 8px 4px;
  background: linear-gradient(160deg, var(--box-bg) 0%, var(--box-bg-2) 100%);
  border: 1px solid var(--box-border);
  border-radius: 16px;
  color: var(--box-text);
  text-decoration: none;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.letter-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.10), transparent 62%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.letter-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  background: linear-gradient(160deg, var(--box-bg-hover) 0%, var(--box-bg) 100%);
  box-shadow: 0 12px 26px -10px var(--glow);
}

.letter-card:hover::before { opacity: 1; }
.letter-card:hover .lc-letter { color: var(--accent-light); }
.letter-card:active { transform: translateY(-1px) scale(0.985); }

.lc-letter {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 1px;
  color: var(--text-primary);
  transition: color 0.18s ease;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
}

.lc-sub {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.75;
}

/* ===== Grammar topic cards (English page) ===== */
.sets-grid.topics {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.sets-grid.topics .topic-card {
  flex: 0 1 calc(33.333% - 8px);
  min-width: 0;
}

.topic-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 96px;
  padding: 16px 18px;
  text-align: center;
  background: linear-gradient(160deg, var(--box-bg) 0%, var(--box-bg-2) 100%);
  border: 1px solid var(--box-border);
  border-radius: 16px;
  color: var(--box-text);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.2px;
  text-decoration: none;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.topic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.10), transparent 62%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  background: linear-gradient(160deg, var(--box-bg-hover) 0%, var(--box-bg) 100%);
  box-shadow: 0 12px 26px -10px var(--glow);
  color: #fff;
}

.topic-card:hover::before { opacity: 1; }
.topic-card:active { transform: translateY(-1px) scale(0.99); }

/* ===== Sub-topic cards (e.g. Pronouns page) ===== */
.sets-grid.subtopics {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.sets-grid.subtopics .topic-card {
  flex: 0 1 calc(20% - 9.6px);
  min-width: 0;
  min-height: 108px;
  padding: 14px 10px;
  font-size: 15px;
}

/* ===== Back link ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 10px 0 6px;
  padding: 7px 15px;
  border-radius: 999px;
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  color: var(--box-text-dim);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.2px;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.back-link:hover {
  color: #fff;
  background: var(--box-bg-hover);
  border-color: var(--primary);
  transform: translateX(-2px);
}

.back-link .bl-arrow { font-size: 14px; line-height: 1; }

/* ===== Hint ===== */
.sets-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin: 0;
  color: var(--box-text-dim);
  font-size: 12.5px;
  line-height: 1.6;
  text-align: center;
}

.sets-hint::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--title-gold);
  flex-shrink: 0;
  box-shadow: 0 0 8px var(--glow);
}

/* ===== Quiz page ===== */
body.quiz-body { padding-bottom: 112px; }

.quiz-wrap { max-width: 820px; margin: 0 auto; }

.quiz-title {
  position: relative;
  text-align: center;
  margin: 4px 0 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--box-border);
}

.quiz-title h1 {
  font-size: clamp(23px, 4vw, 30px);
  color: var(--title-gold);
  margin: 0 0 8px;
  letter-spacing: 0.2px;
}

.quiz-title p {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin: 0;
}

.quiz-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%);
  width: 130px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--title-gold), transparent);
}

/* ===== Topic guide (collapsible rule card) ===== */
.guide-card {
  margin: 0 0 22px;
  background: linear-gradient(160deg, var(--box-bg) 0%, var(--box-bg-2) 100%);
  border: 1px solid var(--box-border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.guide-card[open] {
  border-color: var(--primary);
  box-shadow: 0 16px 34px -26px var(--glow);
}

.guide-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.2s ease;
}

.guide-head::-webkit-details-marker { display: none; }
.guide-head:hover { background: var(--box-bg-hover); }

.guide-tag {
  flex-shrink: 0;
  padding: 3px 9px;
  border-radius: 7px;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.guide-title {
  flex: 1;
  min-width: 0;
  color: var(--box-text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.2px;
}

.guide-chevron {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-right: 2px solid var(--box-text-dim);
  border-bottom: 2px solid var(--box-text-dim);
  transform: rotate(45deg);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.guide-card[open] .guide-chevron {
  margin-top: 3px;
  transform: rotate(-135deg);
  border-color: var(--primary-light);
}

.guide-body { padding: 2px 16px 17px; }

.guide-lead {
  margin: 0 0 13px;
  color: var(--text-secondary);
  font-size: 13.5px;
  line-height: 1.75;
}

.guide-lead b { color: var(--box-text); font-weight: 700; }

.guide-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0 0 7px;
}

.pronoun-chip {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--box-bg-2);
  border: 1px solid var(--box-border);
  color: var(--title-gold);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.3px;
}

/* empty slot — marks a form the language does not have (e.g. "it") */
.pronoun-chip.is-empty {
  background: transparent;
  border-style: dashed;
  color: var(--box-text-dim);
  opacity: 0.75;
  font-weight: 700;
}

.guide-note {
  margin: 0 0 15px;
  color: var(--box-text-dim);
  font-size: 12px;
  line-height: 1.6;
}

.guide-note b { color: var(--box-text); font-weight: 700; }

/* Arabic translation sitting under an English instruction.
   Examples below it stay in English. */
.ar-block {
  display: block;
  margin-top: 5px;
  direction: rtl;
  text-align: right;
  font-family: 'Segoe UI', Tahoma, 'Noto Naskh Arabic', Arial, sans-serif;
  font-size: 0.94em;
  font-weight: 600;
  line-height: 1.95;
  letter-spacing: 0;
  color: var(--box-text-dim);
  unicode-bidi: isolate;
}

.ar-inline {
  direction: rtl;
  font-family: 'Segoe UI', Tahoma, 'Noto Naskh Arabic', Arial, sans-serif;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  color: var(--box-text-dim);
  unicode-bidi: isolate;
}

.guide-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.guide-rule {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 11px 13px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--box-border);
  border-radius: 12px;
}

.gr-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 11.5px;
  font-weight: 800;
  display: grid;
  place-items: center;
  box-shadow: 0 5px 14px -8px var(--glow);
}

.gr-body { min-width: 0; }

.gr-text {
  margin: 0;
  color: var(--box-text);
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.6;
}

.gr-ex {
  margin: 5px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
  font-style: italic;
  line-height: 1.6;
}

.gr-ex b {
  color: var(--title-gold);
  font-style: normal;
  font-weight: 800;
}

.guide-key {
  margin: 0 0 15px;
  padding: 10px 13px;
  border-radius: 11px;
  background: var(--glow-soft);
  border: 1px solid var(--box-border);
  border-left: 3px solid var(--primary);
  color: var(--box-text);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;
}

.guide-sub {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  color: var(--box-text-dim);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.guide-sub::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--box-border);
}

.prep-row {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin: 7px 0 0;
}

/* small inline chip — used for prepositions and auxiliary verbs */
.prep-chip {
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--box-border);
  color: var(--box-text-dim);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.quiz-item {
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 14px;
  padding: 16px 18px;
  margin-bottom: 12px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.quiz-item.is-correct {
  border-color: #22c55e;
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.35), 0 10px 24px -16px rgba(34, 197, 94, 0.7);
}

.quiz-item.is-wrong {
  border-color: #ef4444;
  box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.32), 0 10px 24px -16px rgba(239, 68, 68, 0.65);
}

.q-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 13px;
}

.question-badge {
  flex-shrink: 0;
  margin-top: 1px;
  min-width: 24px;
  padding: 3px 8px;
  border-radius: 7px;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 11.5px;
  font-weight: 800;
  text-align: center;
  line-height: 1.4;
}

.q-text {
  margin: 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--box-text);
}

.q-blank {
  color: var(--title-gold);
  letter-spacing: 1px;
  font-weight: 700;
}

.q-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.opt {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 12px;
  background: var(--box-bg-2);
  border: 1.5px solid var(--box-border);
  border-radius: 10px;
  color: var(--box-text);
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease, color 0.16s ease;
}

.opt:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--box-bg-hover);
  transform: translateY(-1px);
}

.opt:disabled { cursor: default; }

.opt-key {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.opt.correct {
  background: rgba(34, 197, 94, 0.16);
  border-color: #22c55e;
  color: #c7f9db;
}
.opt.correct .opt-key { background: #22c55e; color: #06280f; }

.opt.wrong {
  background: rgba(239, 68, 68, 0.14);
  border-color: #ef4444;
  color: #ffc9c9;
}
.opt.wrong .opt-key { background: #ef4444; color: #360808; }

.opt.dim { opacity: 0.42; }

/* counter bar (fixed at the bottom) */
.quiz-counter {
  position: fixed;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  z-index: 70;
  width: calc(100% - 28px);
  max-width: 820px;
  padding: 11px 18px;
  background: linear-gradient(160deg, var(--box-bg-hover) 0%, var(--box-bg) 100%);
  border: 1px solid var(--primary);
  border-radius: 16px;
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.95), 0 0 0 4px var(--glow-soft);
}

.qc-inner {
  display: flex;
  align-items: center;
  gap: 14px;
}

.qc-stat {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 58px;
  line-height: 1.15;
}

.qc-stat span {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.qc-stat b {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-primary);
}

.qc-right { align-items: flex-end; text-align: right; }

.qc-progress {
  flex: 1;
  height: 9px;
  border-radius: 999px;
  background: var(--box-bg-2);
  border: 1px solid var(--box-border);
  overflow: hidden;
}

.qc-progress i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--title-gold));
  transition: width 0.35s ease;
}

.quiz-counter.done { border-color: var(--primary); }

/* result card */
.result-card {
  margin: 28px 0 12px;
  padding: 24px 20px;
  text-align: center;
  background: var(--box-bg);
  border: 2px solid var(--title-gold);
  border-radius: 16px;
  transition: box-shadow 0.3s ease;
}

.result-card.done {
  box-shadow: 0 0 0 4px var(--glow-soft), 0 20px 44px -24px var(--glow);
}

.result-card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--title-gold);
  letter-spacing: 0.3px;
}

.score-display {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--accent);
  margin: 4px 0;
  direction: ltr;
}

.score-display .of {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-secondary);
}

.feedback-message {
  margin: 8px auto 0;
  max-width: 48ch;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--text-secondary);
}

.best-line {
  margin: 14px 0 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--title-gold);
}

.retry-btn {
  margin-top: 18px;
  padding: 11px 26px;
  border: 1px solid var(--primary);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.retry-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -14px var(--glow);
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--box-bg) 0%, var(--bg-dark) 100%);
  color: var(--text-secondary);
  padding: 40px 20px 25px;
  margin-top: 50px;
  border-top: 1px solid var(--border);
  text-align: center;
  overflow: hidden;
  transition: background 0.45s ease;
}

.footer-glow {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 120px;
  background: radial-gradient(ellipse, var(--glow-soft) 0%, transparent 70%);
  pointer-events: none;
}

.footer-container {
  max-width: 800px;
  margin: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.footer-logo {
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-text {
  margin: 0;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.footer-links a {
  color: var(--accent);
  font-size: 13.5px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 8px;
  transition: all 0.25s ease;
}

.footer-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.footer-bottom-bar {
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, var(--primary) 50%, transparent 100%);
  border-radius: 2px;
  margin-top: 8px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 14px);
  max-width: calc(100vw - 32px);
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--box-bg-hover);
  border: 1px solid var(--primary);
  color: var(--text-primary);
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.6), 0 0 0 4px var(--glow-soft);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 80;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .sets-grid.subtopics .topic-card { flex: 0 1 calc(50% - 6px); min-height: 92px; }
}

@media (max-width: 768px) {
  .brand-title { font-size: 27px; }
  .sets-grid { gap: 10px; }
  .lc-letter { font-size: 30px; }
  .topic-card { min-height: 86px; font-size: 15px; padding: 13px 12px; }
}

@media (max-width: 600px) {
  .site-header { padding: 26px 15px 0; }
  .brand-sub { font-size: 13px; letter-spacing: 3.5px; }
  .brand-title { font-size: 22px; line-height: 1.45; }
  .header-divider { width: 80%; height: 3px; margin-top: 16px; }

  .share-bar-inner { flex-direction: column; gap: 7px; }
  .share-bar-text { font-size: 11.5px; }
  .share-bar-btn { width: 28px; height: 28px; }

  .page-content { padding: 20px 13px 34px; }

  .lang-btn { font-size: 15.5px; padding: 13px 8px; border-radius: 11px; }
  .lang-btn .flag { font-size: 16px; }

  .gold-divider { width: 78%; height: 3px; margin: 18px auto 15px; }

  .sets-grid { gap: 8px; }
  .letter-card { border-radius: 13px; }
  .lc-letter { font-size: 25px; }
  .lc-sub { font-size: 8px; letter-spacing: 0.1em; }

  .sets-grid.topics { gap: 9px; }
  .sets-grid.topics .topic-card { flex: 0 1 calc(50% - 5px); }
  .topic-card { min-height: 76px; font-size: 14px; padding: 12px 8px; border-radius: 13px; }

  .sets-grid.subtopics { gap: 9px; }
  .sets-grid.subtopics .topic-card { flex: 0 1 calc(50% - 4.5px); min-height: 82px; font-size: 13.5px; padding: 11px 7px; }

  .back-link { font-size: 11.5px; padding: 6px 13px; }

  .site-footer { padding: 30px 15px 20px; margin-top: 36px; }
  .footer-logo { font-size: 22px; }
  .sets-hint { font-size: 11.5px; }

  .quiz-title h1 { font-size: 22px; }
  .quiz-title p { font-size: 12.5px; }

  .guide-card { margin-bottom: 16px; border-radius: 14px; }
  .guide-head { padding: 11px 13px; gap: 8px; }
  .guide-tag { font-size: 9px; padding: 2px 7px; }
  .guide-title { font-size: 12.5px; }
  .guide-body { padding: 2px 13px 14px; }
  .guide-lead { font-size: 12.5px; margin-bottom: 11px; }
  .guide-chips { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .pronoun-chip { padding: 6px 4px; font-size: 12.5px; text-align: center; }
  .guide-note { font-size: 11px; margin-bottom: 12px; }
  .guide-rule { padding: 9px 11px; gap: 9px; border-radius: 10px; }
  .gr-text { font-size: 12.5px; }
  .gr-ex { font-size: 12px; }
  .gr-num { width: 20px; height: 20px; font-size: 10.5px; }
  .guide-key { font-size: 12px; padding: 9px 11px; margin-bottom: 12px; }
  .guide-sub { font-size: 9px; margin-bottom: 8px; }
  .prep-chip { font-size: 10.5px; padding: 2px 7px; }
  .ar-inline { font-size: 10px; }
  .ar-block { font-size: 12.5px; }
  .guide-note .ar-block { font-size: 11px; }

  .quiz-item { padding: 13px 12px; border-radius: 12px; }
  .q-head { gap: 8px; margin-bottom: 11px; }
  .q-text { font-size: 14px; }
  .question-badge { min-width: 21px; padding: 2px 6px; font-size: 10.5px; }
  .q-options { gap: 6px; }
  .opt { padding: 10px 7px; font-size: 13.5px; gap: 5px; }
  .opt-key { width: 17px; height: 17px; font-size: 9.5px; border-radius: 5px; }
  .quiz-counter { padding: 9px 12px; bottom: 10px; border-radius: 14px; }
  .qc-inner { gap: 10px; }
  .qc-stat { min-width: 46px; }
  .qc-stat b { font-size: 14px; }
  .qc-stat span { font-size: 8px; }
  .score-display { font-size: 34px; }
  .result-card { padding: 20px 14px; }
  body.quiz-body { padding-bottom: 100px; }
}

@media (max-width: 380px) {
  .lc-sub { display: none; }
  .lc-letter { font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}