/* Police chargée ici via @import (pas de <link> possible depuis un fichier CSS enqueue
   par shortcode.php) — voir frontend/session.html pour l'équivalent en <link> preconnect. */
@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,500;0,700;0,900;1,400&display=swap');

  /*
    Système de design URSULLA — palette inspirée d'afroranking.com (vert forêt / or, tons
    "croissance en Afrique"), typographie Roboto (Google Fonts) sur toute l'interface,
    signature visuelle : le verdict de fin de session prend la forme d'un sceau circulaire
    (double anneau), écho direct au tampon d'un examen officiel — rappel volontaire du
    sérieux de l'épreuve, jamais décoratif pour lui-même.
  */
  :root {
    --forest: #0b3d2e;
    --forest-2: #146b4e;
    --forest-tint: #e3efe7;
    --gold: #f2a93b;
    --gold-deep: #d6841b;
    --terracotta: #d2603f;
    --ivory: #fbf6ec;
    --paper: #ffffff;
    --ink: #1c1912;
    --ink-muted: #6b6152;
    --border: #e6dcc8;
    --success-bg: #e3efe7;
    --success-text: #146b4e;
    --success-border: #a9d0b8;
    --danger-bg: #fbe9e2;
    --danger-text: #a83f22;
    --danger-border: #e3b39f;
    --focus: #d6841b;
    --shadow-sm: 0 1px 2px rgba(28, 25, 18, 0.06), 0 1px 1px rgba(28, 25, 18, 0.04);
    --shadow-md: 0 8px 20px -6px rgba(11, 61, 46, 0.22);
    --font: 'Roboto', -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --forest: #7fd6ac;
      --forest-2: #59c294;
      --forest-tint: #10241c;
      --gold: #f6bb5e;
      --gold-deep: #f2a93b;
      --terracotta: #e58363;
      --ivory: #12181a;
      --paper: #1a2320;
      --ink: #f1ede2;
      --ink-muted: #a6a89e;
      --border: #2c3733;
      --success-bg: #142a20;
      --success-text: #7fd6ac;
      --success-border: #2f5d47;
      --danger-bg: #2c1c17;
      --danger-text: #f0a084;
      --danger-border: #5f382a;
      --focus: #f6bb5e;
      --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
      --shadow-md: 0 8px 24px -6px rgba(0, 0, 0, 0.5);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  }

  * { box-sizing: border-box; }

  html, body {
    margin: 0;
    padding: 0;
    background: var(--ivory);
    color: var(--ink);
    font-family: var(--font);
    line-height: 1.5;
  }

  body {
    min-height: 100vh;
    padding: 20px 16px 64px;
  }

  .wrap {
    max-width: 720px;
    margin: 0 auto;
  }

  h1, h2, h3 {
    font-family: var(--font);
    font-weight: 900;
    letter-spacing: -0.01em;
    line-height: 1.2;
    margin: 0 0 8px;
    color: var(--forest);
  }

  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.2rem; }
  h3 { font-size: 1.05rem; }

  p { margin: 0 0 12px; }

  .muted { color: var(--ink-muted); }

  .screen { display: none; }
  .screen.active { display: block; animation: rise 0.35s ease both; }

  @keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  header.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 24px;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--forest) 0%, var(--forest-2) 100%);
    border-radius: 14px;
    box-shadow: var(--shadow-md);
  }

  header.app-header .brand {
    font-family: var(--font);
    font-size: 1.15rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #fff;
  }

  header.app-header .muted {
    color: rgba(255, 255, 255, 0.78);
    font-weight: 500;
    font-size: 0.88rem;
  }

  .card {
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
  }

  /* --- Tabs (start screen) --- */
  .tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 18px;
    padding: 5px;
    background: var(--forest-tint);
    border-radius: 999px;
    width: fit-content;
  }

  .tab-btn {
    font-family: var(--font);
    font-size: 0.92rem;
    font-weight: 700;
    padding: 9px 18px;
    background: none;
    border: none;
    border-radius: 999px;
    color: var(--forest);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
  }

  .tab-btn.active {
    color: #fff;
    background: var(--forest);
    box-shadow: var(--shadow-sm);
  }

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

  fieldset {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px 16px;
    margin: 0 0 16px;
  }

  legend {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--ink-muted);
    padding: 0 6px;
  }

  .choice-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .choice {
    position: relative;
  }

  .choice input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
  }

  .choice label {
    display: block;
    padding: 10px 18px;
    border: 1.5px solid var(--border);
    border-radius: 999px;
    background: var(--paper);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    user-select: none;
    transition: transform 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
  }

  .choice label:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }

  .choice input:checked + label {
    border-color: var(--gold-deep);
    background: var(--gold);
    color: var(--forest);
  }

  .choice input:focus-visible + label {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
  }

  label.field-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--ink-muted);
    margin-bottom: 6px;
  }

  input[type="number"] {
    font-family: var(--font);
    font-size: 1rem;
    padding: 9px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    background: var(--paper);
    color: var(--ink);
    width: 120px;
  }

  input[type="number"]:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 1px;
  }

  .theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
  }

  .theme-card {
    position: relative;
  }

  .theme-card input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
  }

  .theme-card label {
    display: block;
    height: 100%;
    padding: 13px 14px;
    border: 1.5px solid var(--border);
    border-left: 4px solid var(--forest-2);
    border-radius: 10px;
    background: var(--paper);
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  }

  .theme-card label:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

  .theme-card .theme-num {
    font-family: var(--font);
    font-weight: 900;
    color: var(--forest-2);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  .theme-card .theme-nom {
    font-size: 0.94rem;
    font-weight: 500;
    margin: 4px 0 6px;
  }

  .theme-card .theme-count {
    font-size: 0.78rem;
    color: var(--ink-muted);
  }

  .theme-card input:checked + label {
    border-color: var(--gold-deep);
    border-left-color: var(--gold-deep);
    background: #fff7ea;
    box-shadow: var(--shadow-md);
  }

  .theme-card input:focus-visible + label {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
  }

  .theme-card.disabled label {
    cursor: not-allowed;
    border-left-color: var(--border);
    opacity: 0.6;
  }

  .theme-card.disabled label:hover { transform: none; box-shadow: none; }

  .theme-card.disabled .theme-count {
    display: inline-block;
    margin-top: 2px;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--danger-bg);
    color: var(--danger-text);
    font-weight: 700;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
  }

  button.primary {
    font-family: var(--font);
    font-size: 1rem;
    font-weight: 700;
    padding: 13px 24px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-deep) 100%);
    color: var(--forest);
    border: none;
    border-radius: 999px;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.12s ease, box-shadow 0.12s ease;
  }

  button.primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
  }

  button.primary:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }

  button.primary:not(:disabled):active { transform: translateY(0); }

  button.secondary {
    font-family: var(--font);
    font-size: 0.92rem;
    font-weight: 700;
    padding: 11px 18px;
    background: transparent;
    color: var(--forest);
    border: 1.5px solid var(--forest);
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.12s ease, transform 0.12s ease;
  }

  button.secondary:hover {
    background: var(--forest-tint);
    transform: translateY(-1px);
  }

  /* --- Question screen --- */
  .q-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--ink-muted);
  }

  .q-progress { font-weight: 900; color: var(--forest); font-size: 1rem; }

  .q-timer {
    font-variant-numeric: tabular-nums;
    font-family: var(--font);
    font-weight: 700;
    font-size: 0.95rem;
    color: #fff;
    background: var(--forest);
    border-radius: 999px;
    padding: 5px 14px;
  }

  .progress-track {
    height: 8px;
    background: var(--forest-tint);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 18px;
  }

  .progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--gold) 0%, var(--terracotta) 100%);
    border-radius: 999px;
    transition: width 0.4s ease;
  }

  .q-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
  }

  .q-tag {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #fff;
    background: var(--forest-2);
    border-radius: 999px;
    padding: 4px 10px;
  }

  .q-text {
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 20px;
  }

  .options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
  }

  .option-row {
    position: relative;
  }

  .option-row input {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
  }

  .option-row label {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px 16px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    background: var(--paper);
    cursor: pointer;
    font-size: 1rem;
    transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  }

  .option-row:not(.disabled) label:hover {
    transform: translateX(2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--gold-deep);
  }

  .option-code {
    font-family: var(--font);
    font-weight: 900;
    color: #fff;
    background: var(--forest);
    border-radius: 50%;
    width: 1.6em;
    height: 1.6em;
    min-width: 1.6em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85em;
  }

  .option-row input:checked + label {
    border-color: var(--gold-deep);
    border-width: 2px;
    background: #fff7ea;
  }

  .option-row input:checked + label .option-code {
    background: var(--gold-deep);
  }

  .option-row input:focus-visible + label {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
  }

  .option-row.disabled label {
    cursor: default;
  }

  .option-row.correct label {
    border-color: var(--success-border);
    background: var(--success-bg);
  }

  .option-row.correct label .option-code {
    background: var(--forest-2);
  }

  .option-row.incorrect label {
    border-color: var(--danger-border);
    background: var(--danger-bg);
    animation: shake 0.4s ease;
  }

  .option-row.incorrect label .option-code {
    background: var(--terracotta);
  }

  @keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
  }

  .option-explication {
    font-size: 0.85rem;
    color: var(--ink-muted);
    margin-top: 6px;
    padding-left: calc(1.6em + 12px);
  }

  .q-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
  }

  .feedback-panel {
    border-radius: 12px;
    padding: 18px;
    margin-top: 20px;
    border-left: 5px solid;
    animation: rise 0.3s ease both;
  }

  .feedback-panel.correct {
    background: var(--success-bg);
    border-left-color: var(--success-text);
    color: var(--success-text);
  }

  .feedback-panel.incorrect {
    background: var(--danger-bg);
    border-left-color: var(--danger-text);
    color: var(--danger-text);
  }

  .feedback-verdict {
    font-family: var(--font);
    font-weight: 900;
    font-size: 1.05rem;
    margin-bottom: 6px;
  }

  .feedback-explication {
    color: var(--ink);
    font-size: 0.95rem;
    margin-top: 8px;
  }

  /* --- End screen --- */
  .score-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
  }

  .score-box {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    text-align: center;
    background: var(--paper);
    box-shadow: var(--shadow-sm);
  }

  .score-box .score-label {
    font-size: 0.78rem;
    color: var(--ink-muted);
    margin-bottom: 6px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .score-box .score-value {
    font-family: var(--font);
    font-size: 2.3rem;
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    color: var(--forest);
  }

  .screen.active .score-box .score-value {
    animation: pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  }

  .screen.active .score-box:nth-child(2) .score-value { animation-delay: 0.08s; }

  @keyframes pop {
    from { opacity: 0; transform: scale(0.6); }
    to { opacity: 1; transform: scale(1); }
  }

  /* Sceau de verdict — signature visuelle : double anneau façon tampon d'examen. */
  .verdict {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 128px;
    height: 128px;
    margin: 4px auto 24px;
    border-radius: 50%;
    font-weight: 900;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    text-align: center;
    padding: 8px;
  }

  .verdict::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 2px dashed currentColor;
    opacity: 0.45;
  }

  .screen.active .verdict {
    animation: seal 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  }

  @keyframes seal {
    from { opacity: 0; transform: scale(0.5) rotate(-12deg); }
    to { opacity: 1; transform: scale(1) rotate(0deg); }
  }

  .verdict.reussi {
    background: var(--success-bg);
    color: var(--success-text);
    border: 3px solid var(--success-text);
  }

  .verdict.echec {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 3px solid var(--danger-text);
  }

  .end-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }

  /* --- Error banner --- */
  .error-banner {
    background: var(--danger-bg);
    color: var(--danger-text);
    border-left: 5px solid var(--danger-text);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 0.92rem;
    font-weight: 500;
    display: none;
  }

  .error-banner::before {
    content: 'Erreur — ';
    font-weight: 900;
  }

  .error-banner.visible { display: block; animation: rise 0.25s ease both; }

  .loading-note {
    color: var(--ink-muted);
    font-size: 0.9rem;
    font-style: italic;
  }

  @media (max-width: 480px) {
    .score-grid { grid-template-columns: 1fr; }
    .q-status { flex-direction: column; align-items: flex-start; gap: 6px; }
    .verdict { width: 108px; height: 108px; font-size: 0.85rem; }
  }