:root {
  --sky-1: #0f2a4a;
  --sky-2: #163a5f;
  --sky-3: #1f4d7a;
  --accent: #f2a541;
  --accent-dark: #c9822f;
  --text: #eaf1fb;
  --text-dim: #b7c7dd;
  --card-bg: #142f4f;
  --card-border: #24507c;
  --ok: #4caf7d;
  --bad: #e5645a;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--sky-1), var(--sky-2) 60%, var(--sky-3));
  background-attachment: fixed;
  color: var(--text);
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  line-height: 1.55;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent); }

.disclaimer {
  background: #3a2410;
  border-bottom: 2px solid var(--accent-dark);
  color: #ffe9c7;
  font-size: 0.85rem;
  padding: 10px 20px;
  text-align: center;
}
.disclaimer a { color: var(--accent); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 42, 74, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--card-border);
}

.nav-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 20px;
}

.brand {
  font-weight: 800;
  font-size: 1.15rem;
}
.brand small {
  display: block;
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tab-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-dim);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}
.tab-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}
.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1103;
}

main {
  padding: 28px 0 60px;
}

.panel { display: none; }
.panel.active { display: block; }

.panel-title {
  font-size: 1.6rem;
  margin: 0 0 6px;
}

.panel-intro {
  color: var(--text-dim);
  margin: 0 0 22px;
  max-width: 70ch;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 14px;
}
.card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.card h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--accent);
}
.card ul {
  margin: 0;
  padding-left: 20px;
}
.card li {
  margin-bottom: 6px;
}
.card li:last-child { margin-bottom: 0; }

.reviewed {
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.reviewed input { accent-color: var(--ok); }
.card.is-reviewed {
  border-color: var(--ok);
}

.lex-search {
  width: 100%;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: 18px;
}
.lex-search:focus {
  outline: 2px solid var(--accent);
}

.lexique {
  display: grid;
  gap: 10px;
  margin: 0;
}
.lex-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 12px 16px;
}
.lex-item dt {
  font-weight: 700;
  color: var(--accent);
}
.lex-item dd {
  margin: 4px 0 0;
  color: var(--text-dim);
}
.lex-empty { color: var(--text-dim); }

.quiz-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
.quiz-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.chip {
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 0.78rem;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}
.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1103;
  font-weight: 700;
}

.btn {
  background: var(--accent);
  color: #1a1103;
  border: none;
  padding: 9px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { background: var(--accent-dark); }

.quiz-question {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.quiz-question .q-cat {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 6px;
}
.quiz-question p.q-text {
  margin: 0 0 12px;
  font-weight: 600;
}
.q-options {
  display: grid;
  gap: 8px;
}
.q-option {
  text-align: left;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.92rem;
}
.q-option:hover { border-color: var(--accent); }
.q-option.correct {
  border-color: var(--ok);
  background: rgba(76, 175, 125, 0.15);
}
.q-option.incorrect {
  border-color: var(--bad);
  background: rgba(229, 100, 90, 0.15);
}
.q-option:disabled { cursor: default; }
.q-explain {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-left: 3px solid var(--accent);
  padding-left: 10px;
  display: none;
}
.q-explain.shown { display: block; }

.quiz-summary {
  background: var(--card-bg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  font-size: 1.1rem;
}

.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 20px 0 40px;
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
}

@media (min-width: 720px) {
  .nav-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}