:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --card: #ffffff;
  --text: #0f172a;
  --text-soft: #475569;
  --muted: #94a3b8;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(37, 99, 235, 0.35), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(124, 58, 237, 0.30), transparent 55%),
    var(--bg);
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 4rem 1.25rem 3rem;
}

/* --- En-tête --- */
.site-header {
  text-align: center;
  margin-bottom: 3rem;
}

.banner-path {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.4rem 0.9rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: #dbeafe;
  background: rgba(37, 99, 235, 0.25);
  border: 1px solid rgba(147, 197, 253, 0.35);
  border-radius: 999px;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3rem);
  color: #f8fafc;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0.75rem 0 0;
  font-size: 1.05rem;
  color: var(--muted);
}

/* --- Cartes --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.75rem 1.5rem 1.5rem;
  color: inherit;
  text-decoration: none;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.card:hover,
.card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.5);
  outline: none;
}

.card:focus-visible {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.45), 0 18px 40px rgba(2, 6, 23, 0.5);
}

.card-tag {
  align-self: flex-start;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(37, 99, 235, 0.10);
  border-radius: 6px;
}

.card h2 {
  margin: 0.25rem 0 0;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}

.card-desc {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.5;
}

.card-path {
  margin-top: auto;
  padding-top: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--muted);
}

/* --- Pied de page --- */
.site-footer {
  margin-top: 3rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

.site-footer a {
  color: #bfdbfe;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  .page {
    padding-top: 2.5rem;
  }
}