/* Estilos de la página principal de juegos educativos */

/* Variables y tema (alineado con LETRA_M_v2) */
:root {
  --color-primary: #8A2BE2; /* violeta educativo */
  --color-secondary: #45B7D1; /* azul claro */
  --color-accent: #FFA726;   /* naranja cálido */
  --color-bg: #0b1020;       /* fondo espacial */
  --color-card: #121a2f;     /* tarjeta oscura */
  --color-text: #f5f7fb;
  --color-muted: #b9c4d6;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
  --maxw: 1120px;
}

/* Reset básico */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--color-text);
  background:
    radial-gradient(1600px 600px at 20% -20%, rgba(138,43,226,0.25), transparent 60%),
    radial-gradient(1200px 500px at 110% 20%, rgba(69,183,209,0.15), transparent 60%),
    linear-gradient(#0b1020, #0b1020);
}

/* Sutil campo de estrellas */
body::before {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    radial-gradient(2px 2px at 10% 20%, rgba(255,255,255,0.7), transparent 40%),
    radial-gradient(1.5px 1.5px at 55% 10%, rgba(255,255,255,0.6), transparent 40%),
    radial-gradient(1.5px 1.5px at 80% 60%, rgba(255,255,255,0.6), transparent 40%),
    radial-gradient(2px 2px at 35% 75%, rgba(255,255,255,0.8), transparent 40%),
    radial-gradient(1px 1px at 90% 85%, rgba(255,255,255,0.5), transparent 40%);
  opacity: 0.35;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 20px;
}

.site-header {
  position: relative;
  padding-top: 28px;
}

.site-title {
  margin: 0;
  font-size: clamp(1.6rem, 2.5vw + 1rem, 3rem);
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #fff, #b9c4d6 60%, #fff);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.site-subtitle {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: clamp(0.95rem, 0.6vw + 0.6rem, 1.2rem);
}

.games-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-top: 18px;
}

.game-card {
  display: grid;
  grid-template-rows: auto 1fr;
  background: linear-gradient(180deg, rgba(18,26,47,0.96), rgba(18,26,47,0.92));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.game-card:focus-visible { outline: 3px solid var(--color-secondary); outline-offset: 4px; }
.game-card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.45); border-color: rgba(255,255,255,0.12); }

.card-media { aspect-ratio: 16 / 9; background: #0e162b; position: relative; }
.card-media img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  background: linear-gradient(180deg, #0e162b, #0e162b);
}

/* Fallback visual cuando la imagen no está disponible */
.fallback-thumb {
  position: absolute; inset: 0;
  display: none; /* visible cuando hay error */
  align-items: center; justify-content: center;
  background:
    radial-gradient(800px 300px at 20% 30%, rgba(138,43,226,0.25), transparent 60%),
    radial-gradient(600px 300px at 80% 70%, rgba(69,183,209,0.2), transparent 60%),
    linear-gradient(180deg, #0e162b, #0e162b);
  border-top: 1px dashed rgba(255,255,255,0.15);
  border-bottom: 1px dashed rgba(255,255,255,0.12);
}
.fallback-label {
  color: var(--color-muted);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .3px;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 8px 12px;
  border-radius: 999px;
}

/* Utilidad */
.hidden { display: none !important; }

.card-body { padding: 16px 16px 18px; }
.card-title {
  margin: 0 0 8px;
  font-size: 1.3rem;
}
.card-desc {
  margin: 0 0 14px;
  color: var(--color-muted);
  font-size: 0.98rem;
}

.card-action {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  color: #fff; text-decoration: none; font-weight: 600;
  background: linear-gradient(90deg, var(--color-primary), #5c8df6);
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 6px 14px rgba(92,141,246,0.35);
  transition: transform .14s ease, box-shadow .14s ease, filter .14s ease;
}
.card-action:hover { transform: translateY(-1px); filter: brightness(1.05); }
.card-action:active { transform: translateY(0); }

.site-footer {
  margin-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: var(--color-muted);
}
.site-footer small { display: block; padding: 14px 0; }

/* Accesibilidad y preferencia de movimiento */
@media (prefers-reduced-motion: reduce) {
  .game-card, .card-action { transition: none; }
}

/* Responsive finos */
@media (max-width: 560px) {
  .container { padding: 20px 16px; }
  .card-desc { font-size: 0.95rem; }
}