*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --felt: #1f4f2a;
  --felt-dark: #14361d;
  --felt-light: #2d6b3a;
  --accent: #c8963e;
  --accent-light: #dbb45c;
  --bg: #e8e3d8;
  --card: #ffffff;
  --card-border: #d4cdbe;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --suit-red: #d50000;
  --suit-black: #000000;
  --green: #2e7d32;
  --green-light: #e6f4ea;
  --red: #c62828;
  --red-light: #fce4ec;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.08);
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --transition: 0.25s ease;
  --bg-img: url('ressources/tapi_bridge_becheau.jpeg');
}

html, body {
  height: 100%;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

#app {
  height: 100dvh;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
  transform: translateY(8px);
}

.screen.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ========== HOME ========== */
#home-screen {
  justify-content: center;
  align-items: center;
  padding: 0;
  background:
    linear-gradient(180deg, rgba(20,54,29,0.92), rgba(31,79,42,0.90)),
    var(--bg-img) center/cover no-repeat;
  background-color: var(--felt-dark);
}

.home-content {
  text-align: center;
  width: 100%;
  max-width: 420px;
  background: rgba(0,0,0,0.45);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 40px 32px 36px;
  margin: 24px;
  animation: fadeUp 0.5s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 38px;
  font-weight: 700;
  font-family: var(--font-serif);
  color: #ffffff;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 20px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 500;
}

.description {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 340px;
  margin-left: auto;
  margin-right: auto;
}

.version {
  position: absolute;
  bottom: 8px;
  left: 12px;
  font-size: 10px;
  color: #999;
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: 0.5px;
  user-select: none;
  z-index: 10;
  pointer-events: none;
}

/* ========== BUTTONS ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  background: var(--accent);
  color: #1a1a1a;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.btn-primary:hover {
  background: var(--accent-light);
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-primary .btn-icon {
  font-size: 16px;
  transition: transform 0.2s ease;
}

.btn-primary:hover .btn-icon {
  transform: translateX(4px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.btn-secondary:hover {
  background: var(--bg);
}

.btn-secondary:active {
  transform: scale(0.97);
}

.btn-icon-only {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  transition: background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.btn-icon-only:hover {
  background: var(--bg);
}

.btn-icon-only:active {
  transform: scale(0.95);
}

/* ========== CHAPTER SELECTION ========== */
#chapter-screen {
  background: linear-gradient(180deg, rgba(232,227,216,0.96), rgba(232,227,216,0.96)),
              var(--bg-img) center/cover no-repeat fixed;
  background-color: var(--bg);
}

.chapter-header {
  padding: 24px 24px 8px;
  text-align: center;
  flex-shrink: 0;
}

.chapter-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.chapter-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.chapter-total-questions {
  font-size: 12px;
  color: var(--felt);
  font-weight: 600;
  margin-top: 6px;
}

.chapter-body {
  flex: 1;
  overflow-y: auto;
  padding: 8px 20px 8px;
  -webkit-overflow-scrolling: touch;
}

.chapter-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding: 0 2px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.btn-ghost:hover {
  background: var(--bg);
  color: var(--text);
}

.btn-ghost:active {
  transform: scale(0.97);
}

.check-icon { font-size: 14px; }

.chapter-count {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
  background: var(--card);
  padding: 4px 10px;
  border: 1px solid var(--card-border);
}

.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 8px;
}

.chapter-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  background: var(--card);
  border: 1px solid var(--card-border);
  cursor: pointer;
  transition: border-color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.chapter-item:hover {
  border-color: var(--felt-light);
}

.chapter-item:active {
  transform: scale(0.99);
}

.chapter-item.selected {
  border-color: var(--felt);
  background: #e8f0e8;
}

.chapter-checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 12px;
  transition: all 0.15s ease;
  color: transparent;
}

.chapter-item.selected .chapter-checkbox {
  background: var(--felt);
  border-color: var(--felt);
  color: white;
}

.chapter-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 44px;
  flex-shrink: 0;
}

.chapter-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
  flex: 1;
}

.chapter-qcount {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  padding: 2px 8px;
  border: 1px solid var(--card-border);
  flex-shrink: 0;
}

.chapter-footer {
  padding: 12px 24px 20px;
  text-align: center;
  flex-shrink: 0;
}

.chapter-footer .btn-primary {
  width: 100%;
  justify-content: center;
}

.chapter-footer .btn-primary.disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* ========== QUIZ ========== */
#quiz-screen {
  background: linear-gradient(180deg, rgba(232,227,216,0.96), rgba(232,227,216,0.96)),
              var(--bg-img) center/cover no-repeat fixed;
  background-color: var(--bg);
}

.quiz-header {
  padding: 16px 20px 12px;
  background: var(--card);
  border-bottom: 1px solid var(--card-border);
  flex-shrink: 0;
}

.progress-bar-container {
  height: 4px;
  background: var(--bg);
  margin-bottom: 10px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--felt);
  transition: width 0.4s ease;
}

.quiz-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
}

.live-score {
  font-size: 13px;
  font-weight: 700;
  color: var(--felt);
  background: #e8f0e8;
  padding: 3px 10px;
}

.chapter-badge {
  padding: 3px 10px;
  background: var(--bg);
  border: 1px solid var(--card-border);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.quiz-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  -webkit-overflow-scrolling: touch;
}

.card {
  background: var(--card);
  padding: 24px 20px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
}

.chapter-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 600;
}

#question-text {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 22px;
  color: var(--text);
}

.qid {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--card-border);
  padding: 1px 5px;
  margin-right: 6px;
  vertical-align: middle;
}

.suit-r { color: var(--suit-red); }
.suit-b { color: var(--suit-black); }

.hand-diagram {
  background: var(--bg);
  border: 1px solid var(--card-border);
  padding: 14px;
  margin-bottom: 18px;
  font-family: 'SF Mono', 'Menlo', monospace;
  font-size: 13px;
  line-height: 1.7;
}

.hand-diagram.hidden {
  display: none;
}

.hand-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  justify-content: center;
}

.hand-box {
  flex: 0 0 auto;
}

.hand-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 2px;
}

.hand-cards {
  white-space: nowrap;
  color: var(--text);
}

.auction-box {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--card-border);
  text-align: center;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.auction-box .speaker {
  color: var(--felt);
  font-weight: 700;
}

.answers {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.answer-btn {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--card-border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  line-height: 1.4;
  -webkit-tap-highlight-color: transparent;
}

.answer-btn:hover {
  border-color: var(--felt-light);
  background: var(--card);
}

.answer-btn:active {
  transform: scale(0.99);
}

.answer-btn.correct {
  border-color: var(--green);
  background: var(--green-light);
  color: var(--green);
  font-weight: 600;
}

.answer-btn.wrong {
  border-color: var(--red);
  background: var(--red-light);
  color: var(--red);
  font-weight: 600;
}

.answer-btn.disabled {
  pointer-events: none;
  opacity: 0.85;
}

.answer-btn.show-correct {
  border-color: var(--green);
  background: var(--green-light);
}

/* ========== FEEDBACK ========== */
.feedback {
  margin-top: 16px;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--card-border);
  animation: fadeSlideUp 0.25s ease;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.feedback-header {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feedback-header.correct { color: var(--green); }
.feedback-header.wrong { color: var(--red); }

.feedback-explanation {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.feedback.hidden { display: none; }

.feedback-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* ========== RESULT ========== */
#result-screen {
  justify-content: center;
  align-items: center;
  padding: 0;
  background:
    linear-gradient(180deg, rgba(20,54,29,0.92), rgba(31,79,42,0.90)),
    var(--bg-img) center/cover no-repeat;
  background-color: var(--felt-dark);
}

.result-content {
  text-align: center;
  width: 100%;
  max-width: 360px;
  background: rgba(0,0,0,0.45);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 36px 28px 32px;
  margin: 24px;
  animation: fadeUp 0.5s ease;
}

.result-icon {
  margin-bottom: 12px;
}

.big-suit {
  font-size: 48px;
  color: var(--accent);
}

#result-title {
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  font-family: var(--font-serif);
}

.score-circle {
  width: 110px;
  height: 110px;
  border: 3px solid var(--accent);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0 auto 16px;
  background: rgba(0,0,0,0.25);
}

.score-value {
  font-size: 34px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

.score-total {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

.result-message {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 20px;
  line-height: 1.6;
}

.result-details {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 28px;
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.detail-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.5);
}

.detail-value {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
}

/* ========== RESPONSIVE ========== */
@media (min-width: 600px) {
  #quiz-screen, #chapter-screen {
    max-width: 580px;
    margin: 0 auto;
  }

  .quiz-body, .chapter-body {
    padding: 20px 28px;
  }

  .chapter-header {
    padding: 32px 28px 12px;
  }

  .card {
    padding: 32px 28px;
  }

  #question-text {
    font-size: 20px;
  }

  h1 {
    font-size: 44px;
  }
}

@media (min-width: 900px) {
  #quiz-screen, #chapter-screen {
    max-width: 680px;
  }
}

@media (max-width: 380px) {
  h1 { font-size: 28px; }
  #question-text { font-size: 16px; }
  .answer-btn { padding: 12px 14px; font-size: 13px; }
  .chapter-title { font-size: 13px; }
}