:root {
  --bg: #0f1923;
  --card: #152a3d;
  --card-affluent: #112231;
  --border: #2a3a4a;
  --text: #e0e8f0;
  --muted: #7a8a9a;
  --accent: #4fc3f7;
  --green: #66bb6a;
  --yellow: #ffa726;
  --red: #ef5350;
  --blue: #42a5f5;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
main {
  display: block; /* compatibilité anciens navigateurs */
  min-height: 100vh;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-display: swap;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
a:hover {
  text-decoration-thickness: 2px;
}

/* ── Boutons icône (header) ───────────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  cursor: pointer;
  transition:
    border-color 0.2s,
    color 0.2s,
    background 0.2s,
    opacity 0.25s;
  padding: 0;
  text-decoration: none;
  flex-shrink: 0;
}
.icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(79, 195, 247, 0.08);
  text-decoration: none;
}
.icon-btn svg {
  width: 18px;
  height: 18px;
}

footer {
  text-align: center;
  padding: 2rem 0 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
}
footer a {
  color: var(--accent);
}
footer a:hover {
  text-decoration-thickness: 2px;
}

.footer-disclaimer {
  margin: 0.5rem 0;
}
.footer-links {
  margin: 0.5rem 0;
}
.footer-credits {
  margin: 0.8rem 0;
  font-size: 0.85rem;
}