/* ====== Estilos principais ====== */
:root{
  --bg: #0f172a;         /* slate-900 */
  --card: #111827;       /* gray-900 */
  --text: #e5e7eb;       /* gray-200 */
  --muted: #9ca3af;      /* gray-400 */
  --brand: #22d3ee;      /* cyan-400 */
  --ring: rgba(34,211,238,.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 80% -10%, rgba(34,211,238,.08), transparent 60%),
              radial-gradient(900px 600px at -10% 120%, rgba(59,130,246,.08), transparent 60%),
              var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

.container{
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 24px;
}

header{
  padding-top: 32px;
  padding-bottom: 8px;
}

h1{
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.1;
  margin: 0 0 8px 0;
}

.intro{
  color: var(--muted);
  margin: 0 0 24px 0;
}

.grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.card{
  display: block;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 18px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.card:hover, .card:focus-visible{
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  border-color: var(--ring);
  outline: none;
}

.card figure{
  margin: 0;
}

.card img{
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: #0b1220;
}

.card figcaption{
  padding: 14px 16px 16px 16px;
  font-weight: 600;
  letter-spacing: .2px;
}

footer{
  padding: 32px 0 60px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}