/* Pages de la plateforme hors cours (accueil provisoire).
   Les jetons de couleur et la typographie sont ceux du cours modèle
   (courses/_modele/src/style.css), qui fait foi : toute modification se fait
   d'abord là-bas, puis se reporte ici. */
:root {
  --bg: #F3F4F7;
  --surface: #FFFFFF;
  --surface-2: #E9ECF1;
  --ink: #1A2130;
  --ink-2: #4A5468;
  --ink-3: #7B8595;
  --line: #D6DBE3;
  --line-strong: #B9C1CD;
  --gold: #A9822B;
  --gold-ink: #7D5F1B;
  --gold-soft: #F5EEDC;
  --gold-line: #D9C48C;
  --focus: #2F5FD0;
  --shadow: 0 10px 30px -12px rgba(26, 33, 48, .25);
  --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "Source Sans 3", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12161E; --surface: #1A2029; --surface-2: #232B37; --ink: #ECEEF2; --ink-2: #B4BCC8; --ink-3: #7F8998;
    --line: #2E3744; --line-strong: #46516A; --gold: #D1AE58; --gold-ink: #E3C97B; --gold-soft: #2A2619; --gold-line: #6B5A2B;
    --focus: #8AB0FF; --shadow: 0 10px 30px -12px rgba(0,0,0,.6); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12161E; --surface: #1A2029; --surface-2: #232B37; --ink: #ECEEF2; --ink-2: #B4BCC8; --ink-3: #7F8998;
  --line: #2E3744; --line-strong: #46516A; --gold: #D1AE58; --gold-ink: #E3C97B; --gold-soft: #2A2619; --gold-line: #6B5A2B;
  --focus: #8AB0FF; --shadow: 0 10px 30px -12px rgba(0,0,0,.6); color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { height: 100%; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100%; background: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: 17px; line-height: 1.6;
  font-feature-settings: "kern", "liga"; -webkit-font-smoothing: antialiased;
  display: flex; flex-direction: column;
}
h1 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0; text-wrap: balance; color: var(--ink); }
p { margin: 0; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

/* Bouton, repris du cours modèle */
.btn { text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 8px; padding: 10px 16px; font-weight: 650; font-size: 15px; border: 1px solid transparent; transition: background .15s, transform .05s; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--ink-2); }
.tb-btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--surface); border-radius: 8px; padding: 7px 10px; font-size: 14px; font-weight: 600; }
.tb-btn:hover { background: var(--surface-2); }

/* Accueil provisoire */
.accueil-haut { display: flex; justify-content: flex-end; padding: 16px 20px; }
.accueil { flex: 1; display: flex; align-items: center; justify-content: center; padding: 24px 20px 64px; }
.accueil-carte {
  width: 100%; max-width: 560px; background: var(--surface); border: 1px solid var(--line);
  border-top: 3px solid var(--gold); border-radius: 12px; box-shadow: var(--shadow);
  padding: 44px 40px; display: flex; flex-direction: column; gap: 18px; align-items: flex-start;
}
.accueil-carte .k { font-size: 13px; font-weight: 600; color: var(--gold-ink); letter-spacing: .02em; }
.accueil-carte h1 { font-size: clamp(30px, 6vw, 40px); }
.accueil-carte .lede { font-family: var(--font-display); font-size: 20px; line-height: 1.5; color: var(--ink-2); }
.accueil-carte .btn { margin-top: 10px; padding: 12px 22px; font-size: 16px; }
.accueil-pied { padding: 20px; text-align: center; font-size: 13.5px; color: var(--ink-3); }
@media (max-width: 480px) { .accueil-carte { padding: 32px 24px; } }