:root {
  --bg: #0f172a;
  --bg-soft: #111c34;
  --card: rgba(255, 255, 255, 0.92);
  --card-strong: #ffffff;
  --text: #102033;
  --muted: #617084;
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --accent: #06b6d4;
  --success: #12805c;
  --success-bg: #dcfce7;
  --danger: #b42318;
  --danger-bg: #fee2e2;
  --warning-bg: #fff7ed;
  --border: rgba(15, 23, 42, 0.12);
  --shadow: 0 24px 70px rgba(2, 6, 23, 0.26);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 58, 237, 0.45), transparent 34rem),
    radial-gradient(circle at top right, rgba(6, 182, 212, 0.35), transparent 30rem),
    linear-gradient(135deg, #08111f 0%, var(--bg) 48%, #172554 100%);
}

button,
a {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.hero {
  color: white;
  padding: 10px 0 34px;
}

.sub-title {
  color: white;
  padding: 24px 0 12px;
  display: flex;
  font-size: 20px;
  font-weight: bold;
  margin: 0 0 -24px;
}

.topbar,
.hero-grid,
.quiz-layout,
.setup-footer,
.result-actions {
  display: flex;
  align-items: center;
}

.topbar {
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 56px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: #0f172a;
  background: linear-gradient(135deg, #fff, #c7d2fe);
  box-shadow: 0 14px 34px rgba(124, 58, 237, 0.35);
}

.hero-grid {
  justify-content: space-between;
  gap: 32px;
}

.hero-grid > div {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(2.5rem, 7vw, 5.4rem);
  line-height: 0.92;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.hero-text {
  max-width: 660px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.12rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-link,
.secondary-link,
.primary-button,
.secondary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.primary-link,
.primary-button {
  color: white;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 16px 34px rgba(124, 58, 237, 0.34);
}

.secondary-link,
.secondary-button,
.ghost-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.88);
}

.topbar .ghost-button {
  color: white;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.primary-link:hover,
.secondary-link:hover,
.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  transform: translateY(-2px);
}

.stats-card,
.panel {
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.stats-card {
  flex: 0 0 280px;
  padding: 28px;
  border-radius: 30px;
  color: var(--text);
}

.stats-label,
.stats-subtitle {
  display: block;
  color: var(--muted);
}

.stats-card strong {
  display: block;
  margin: 6px 0;
  font-size: 4rem;
}

main {
  display: grid;
  gap: 22px;
}

.panel {
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 34px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 24px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.6;
}

.compact {
  margin-bottom: 18px;
}

.choice-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.length-card {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 22px;
  min-height: 128px;
  border: 2px solid transparent;
  border-radius: 22px;
  background: var(--card-strong);
  cursor: pointer;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.length-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
}

.length-card input {
  position: absolute;
  inset: 18px 18px auto auto;
  accent-color: var(--primary);
}

.length-card span {
  font-size: 2.8rem;
  font-weight: 900;
}

.length-card small {
  color: var(--muted);
  font-weight: 700;
}

.length-card:has(input:checked) {
  border-color: var(--primary);
  box-shadow: 0 18px 50px rgba(124, 58, 237, 0.18);
}

.setup-footer {
  justify-content: space-between;
  gap: 18px;
  margin-top: 22px;
}

.status-message {
  margin: 0;
  color: var(--muted);
}

.quiz-layout {
  align-items: flex-start;
  gap: 22px;
}

.progress-panel {
  position: sticky;
  top: 20px;
  flex: 0 0 285px;
}

.mini-stat {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.mini-stat span,
.question-meta,
.history-detail,
.history-date {
  color: var(--muted);
  font-size: 0.92rem;
}

.progress-track {
  width: 100%;
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #e2e8f0;
}

.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.28s ease;
}

.score-pill {
  margin: 18px 0;
  padding: 14px;
  border-radius: 18px;
  background: #f8fafc;
  text-align: center;
}

.full-width {
  width: 100%;
}

.question-panel {
  flex: 1;
  min-width: 0;
}

.question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.category-badge {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: #ede9fe;
  font-weight: 800;
}

#questionText {
  margin-bottom: 24px;
  font-size: clamp(1.45rem, 3vw, 2.45rem);
  line-height: 1.14;
}

.answers-grid {
  display: grid;
  gap: 12px;
}

.answer-button {
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px;
  border: 2px solid var(--border);
  border-radius: 18px;
  color: var(--text);
  background: white;
  text-align: left;
}

.answ
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: var(--primary-dark);
  background: #ede9fe;
  font-weight: 900;
}

.answer-button:not(:disabled):hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.answer-button.correct {
  border-color: var(--success);
  background: var(--success-bg);
}

.answer-button.wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.feedback {
  margin-top: 18px;
  padding: 16px;
  border-radius: 18px;
  line-height: 1.5;
}

.feedback.good {
  color: var(--success);
  background: var(--success-bg);
}

.feedback.bad {
  color: var(--danger);
  background: var(--danger-bg);
}

.question-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 18px;
}

.result-panel {
  text-align: center;
}

.result-score {
  margin: 18px 0 8px;
  font-size: clamp(2.4rem, 8vw, 5rem);
  font-weight: 950;
}

.result-message {
  color: var(--muted);
  font-size: 1.08rem;
}

.result-actions {
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.mistakes {
  display: grid;
  gap: 12px;
  margin-top: 24px;
  text-align: left;
}

.mistake-card {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #fff;
}

.mistake-card strong {
  display: block;
  margin-bottom: 8px;
}

.mistake-card p {
  margin: 4px 0;
  color: var(--muted);
}

.history-list {
  display: grid;
  gap: 12px;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.history-score {
  display: block;
  font-size: 1.25rem;
}

.hidden {
  display: none !important;
}

@media (max-width: 820px) {
  .hero-grid,
  .quiz-layout,
  .setup-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .stats-card,
  .progress-panel {
    flex: auto;
  }

  .progress-panel {
    position: static;
  }

  .choice-row {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .history-item {
    align-items: flex-start;
    flex-direction: column;
  }
}


.resume-panel {
  margin-top: 22px;
  border: 1px solid rgba(124, 58, 237, 0.22);
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.10), rgba(6, 182, 212, 0.10));
}

.resume-card {
  display: grid;
  gap: 16px;
}

.resume-actions,
.course-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.course-panel {
  margin-top: 22px;
  overflow: hidden;
  position: relative;
}

.course-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 8px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

.course-panel .section-heading {
  padding-left: 10px;
}

.download-card {
  margin-top: 18px;
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.64);
}

.download-card strong {
  font-size: 1.04rem;
}

.download-card p {
  margin: 0;
  color: var(--muted);
}


/* Sections de révision supplémentaires */
.revision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.revision-card,
.glossary-item,
.analysis-card,
.summary-block {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.68);
  padding: 18px;
}

.revision-card h3,
.glossary-item h3,
.analysis-card h3,
.summary-block h3 {
  margin: 0 0 8px;
}

.revision-card p,
.glossary-item p,
.analysis-card p,
.summary-block p,
.analysis-card li {
  color: var(--muted);
  line-height: 1.62;
}

.summary-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 16px;
  align-items: start;
}

.summary-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.glossary-toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  margin: 16px 0 18px;
}

.search-input {
  width: 100%;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.84);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  outline: none;
}

.search-input:focus {
  border-color: rgba(124, 58, 237, 0.55);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12);
}

.glossary-count {
  color: var(--muted);
  font-weight: 800;
  white-space: nowrap;
}

.glossary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.glossary-meta,
.analysis-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: rgba(124, 58, 237, 0.10);
  font-size: 0.82rem;
  font-weight: 850;
}

.analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}


.figure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.figure-card {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  padding: 18px;
  display: grid;
  gap: 8px;
}

.figure-card h3 {
  margin: 0;
}

.figure-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.figure-example {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(124, 58, 237, 0.08);
  color: var(--text);
  font-weight: 750;
}

.visual-figures {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.62);
}

.visual-figures ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.analysis-card ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.empty-state {
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: 18px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.52);
}


/* Section podcasts */
.podcast-panel {
  margin-top: 22px;
}

.podcast-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.podcast-feature {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(6, 182, 212, 0.28);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.14), rgba(124, 58, 237, 0.10));
}

.podcast-feature strong,
.podcast-card strong {
  display: block;
  font-size: 1.04rem;
}

.podcast-feature p,
.podcast-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.58;
}

.podcast-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.podcast-card {
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.68);
}

.podcast-number {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  color: white;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 12px 30px rgba(124, 58, 237, 0.22);
}

.podcast-panel audio {
  width: 100%;
  margin-top: 4px;
}

@media (max-width: 900px) {
  .revision-grid,
  .summary-layout,
  .glossary-list,
  .analysis-grid,
  .podcast-grid {
    grid-template-columns: 1fr;
  }

  .glossary-toolbar {
    grid-template-columns: 1fr;
  }
}