:root {
  --bg: #020617;
  --card: #020617dd;
  --primary: #38bdf8;
  --accent: #22c55e;
  --danger: #f87171;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: rgba(148,163,184,0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", system-ui, sans-serif;
  min-height: 100vh;
  background: radial-gradient(circle at top, #1e293b, var(--bg));
  color: var(--text);
  padding: 2.5rem 1.5rem;
}

header {
  max-width: 1100px;
  margin: 0 auto 3.6rem;
  text-align: center;
}

header h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

header p {
  color: var(--muted);
  font-size: 1.1rem;
}

.grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

/* --- TARJETAS OPTIMIZADAS --- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2rem;
  text-decoration: none; /* Sin subrayado */
  color: var(--text);      /* Color de texto heredado */
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
  display: flex;          /* Centrado flex */
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
  border-color: var(--primary);
}

.icon {
  font-size: 3.5rem; /* Tamaño resaltado para emojis */
  margin-bottom: 1rem;
  display: block;
  line-height: 1;
}

.card h2 {
  font-size: 1.25rem;
  margin: 0.5rem 0;
  font-weight: 600;
  color: var(--text); /* Evita el azul de link */
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* --- BADGES Y OTROS --- */
.badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.7rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: rgba(56,189,248,0.15);
  color: var(--primary);
}

.warning {
  background: rgba(248,113,113,0.15);
  color: var(--danger);
}

footer {
  text-align: center;
  margin-top: 4rem;
  color: var(--muted);
  font-size: 0.85rem;
}