/* =========================================================
   UNAM Canada — Links Hub (CSS)
   ========================================================= */

/* ---------------- Temas (claro/oscuro) ---------------- */
:root {
  color-scheme: light dark;

  /* Paleta clara (base) */
  --bg: #fafafa;
  --fg: #111111;
  --muted: #666666;
  --accent: #f0b429;

  --card: #ffffff;
  --border: #e5e5e5;

  /* Plate neutro para íconos */
  --icon-plate-bg: #232323;
  --icon-plate-border: #2a2a2a;

  /* Efectos / estados */
  --shadow: 0 1px 2px rgba(0,0,0,.06);
  --shadow-hover: 0 3px 10px rgba(0,0,0,.08);
  --focus-ring: 2px solid rgba(17, 17, 17, .6);

  /* Overlay del hero */
  --hero-overlay: 0.35;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --bg: #0b0b0b;
    --fg: #f5f5f5;
    --muted: #bdbdbd;
    --accent: #f0b429;

    --card: #151515;
    --border: #2a2a2a;

    --icon-plate-bg: #1e1e1e;
    --icon-plate-border: #2a2a2a;

    --shadow: 0 1px 2px rgba(0,0,0,.35);
    --shadow-hover: 0 6px 18px rgba(0,0,0,.45);
    --focus-ring: 2px solid rgba(245, 245, 245, .45);

    --hero-overlay: 0.25;
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg:#fafafa; --fg:#111; --muted:#666; --accent:#f0b429;
  --card:#fff; --border:#e5e5e5;
  --icon-plate-bg:#232323; --icon-plate-border:#2a2a2a;
  --shadow: 0 1px 2px rgba(0,0,0,.06);
  --shadow-hover: 0 3px 10px rgba(0,0,0,.08);
  --focus-ring: 2px solid rgba(17, 17, 17, .6);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg:#0b0b0b; --fg:#f5f5f5; --muted:#bdbdbd; --accent:#f0b429;
  --card:#151515; --border:#2a2a2a;
  --icon-plate-bg:#1e1e1e; --icon-plate-border:#2a2a2a;
  --shadow: 0 1px 2px rgba(0,0,0,.35);
  --shadow-hover: 0 6px 18px rgba(0,0,0,.45);
  --focus-ring: 2px solid rgba(245, 245, 245, .45);
}

/* ---------------- Reset / Tipografía ---------------- */
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
}
.wrap { max-width: 720px; margin: 0 auto; padding: 32px 20px 56px; }

/* Header fijo, opaco, fondo/sombra full-bleed y contenido alineado al .wrap */
header {
  position: sticky;
  top: 0;
  z-index: 1000;

  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;

  padding-block: 18px;
  background: transparent;
  border-bottom: none;
  box-shadow: none;

  margin-bottom: 32px;
  isolation: isolate;
}
header::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: calc(-40px - env(safe-area-inset-top, 0px));
  bottom: 0;
  background: var(--bg);
  box-shadow:
    0 10px 22px -12px rgba(0,0,0,.28),
    0 3px  8px  -4px rgba(0,0,0,.18);
  pointer-events: none;
}
@media (prefers-color-scheme: dark) {
  header::before {
    box-shadow:
      0 14px 28px -14px rgba(0,0,0,.55),
      0 4px 10px  -6px rgba(0,0,0,.45);
  }
}
html { scroll-padding-top: 96px; }

h1 { font-size: 1rem; margin: 0; font-weight: 700; }
.muted { color: var(--muted); font-size: .92rem; }
footer { margin-top: 28px; color: var(--muted); font-size: .9rem; }

/* ---------------- Navegación de idioma ---------------- */
.lang { display: flex; gap: 10px; }
.lang a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  padding: 4px 6px;
  border-radius: 8px;
  border: 1px solid transparent;
}
.lang a:hover { border-color: var(--border); }
.lang a[aria-current="page"] {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------------- Herramientas (lang + switch) ---------------- */
.tools { display: flex; align-items: center; gap: 10px; }

/* Switch */
.theme-toggle {
  position: relative;
  width: 56px;
  height: 30px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--fg) 6%, var(--card));
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: border-color .15s ease, background-color .15s ease, box-shadow .15s ease;
}
.theme-toggle:hover {
  border-color: color-mix(in srgb, var(--fg) 20%, var(--border));
  background: color-mix(in srgb, var(--fg) 8%, var(--card));
  box-shadow: var(--shadow-hover), 0 0 0 3px rgba(56,132,255,.22);
}
.theme-toggle .switch-knob {
  position: absolute;
  top: 50%;
  left: 2px;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid color-mix(in srgb, var(--border) 70%, var(--fg) 30%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: left .18s ease, right .18s ease, background-color .15s ease, border-color .15s ease, box-shadow .15s ease;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 1px 2px rgba(0,0,0,.10);
}
.theme-toggle.is-dark .switch-knob { left: auto; right: 2px; transform: translateY(-50%); }
.theme-toggle .switch-icon { width: 18px; height: 18px; display: block; }
.theme-toggle .theme-icon { display: none; }

/* ---------------- Hero ---------------- */
.hero-box {
  position: relative;
  border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
#hero-img {
  display: block;
  width: 100%;
  max-height: 260px;
  object-fit: cover;
  border: 0;
  box-shadow: none;
  position: relative;
  z-index: 0;
}
.hero-box::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0, var(--hero-overlay, 0.35));
  pointer-events: none;
  z-index: 1;
}
:root[data-theme="dark"] .hero-box::after { background: rgba(0,0,0, var(--hero-overlay, 0.25)); }
.hero-logo-link {
  position: absolute;
  --hero-safe: 22px;
  inset: var(--hero-safe);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  box-shadow: none;
  text-decoration: none;
  line-height: 0;
  z-index: 2;
  cursor: pointer;
}
.hero-logo { display: block; width: auto; height: auto; max-width: 100%; max-height: 100%; object-fit: contain; transition: transform .18s ease; }
.hero-logo-link:hover .hero-logo { transform: scale(1.05); }

/* ---------------- Grid exterior ---------------- */
.grid { display: grid; grid-template-columns: 1fr; gap: 0; }
@media (min-width: 560px) { .grid { grid-template-columns: 1fr 1fr; } }

/* ---------------- Tarjeta ---------------- */
.card {
  /* margen propio (no dependemos del gap del grid) */
  margin: 6px;

  /* caja y estética */
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--fg);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: box-shadow .12s ease, transform .12s ease, border-color .12s ease, background-color .12s ease;

  /* layout interno (2 columnas, 2 filas) */
  display: grid;
  grid-template-columns: 34px 1fr;
  grid-auto-rows: min-content;     /* filas creadas por el contenido */
  column-gap: 12px;
  row-gap: 8px;
  align-items: start;
  /* clave: si el grid exterior estira la tarjeta, esta reparte el sobrante
     entre la fila 1 (label) y la 2 (badge) dejando una arriba y otra abajo */
  align-content: space-between;
}
.card:hover {
  border-color: color-mix(in srgb, var(--fg) 18%, var(--border));
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

/* Icono (columna 1, fila de arriba) */
.card > .icon { grid-column: 1; grid-row: 1; }

/* Contenedor del label (primer <div> dentro de .card) */
.card > div:first-of-type {
  grid-column: 2; grid-row: 1;
  min-width: 0;                    /* evita empujes por texto largo */
}
.label { font-weight: 600; }

/* Badge SIEMPRE en la fila inferior; puede ocupar todo el ancho si lo necesita */
.badge-wrap {
  grid-column: 1 / -1;             /* abarca ambas columnas */
  grid-row: 2;                      /* segunda fila */
  margin: 0;                        /* sin márgenes laterales heredados */
  justify-self: end;                /* pegado a la derecha */
  align-self: end;                  /* pegado al fondo de la tarjeta */
}
.badge {
  display: inline-block;
  box-sizing: border-box;
  text-align: center;

  font-size: .78rem;
  line-height: 1.15;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--fg);

  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  hyphens: none;

  min-width: 6ch;
  max-width: 100%;                  /* puede crecer hasta llenar la tarjeta */
}

/* Icono dentro de plate */
.icon {
  width: 22px; height: 22px; flex: 0 0 22px; display: inline-block;
  padding: 6px;
  border-radius: 10px;
  background: var(--icon-plate-bg);
  border: 1px solid var(--icon-plate-border);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.06),
    0 1px 2px rgba(0,0,0,.10);
  filter: none;
}
.card:hover .icon {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.08),
    0 2px 6px rgba(0,0,0,.12);
  border-color: color-mix(in srgb, var(--icon-plate-border) 70%, var(--fg) 30%);
}

/* Encabezados de categoría alineados con márgenes de tarjeta */
.group-title {
  grid-column: 1 / -1;
  margin: 12px 6px 2px;
  font-size: .95rem;
  color: var(--muted);
  font-weight: 700;
}
.group-gap { grid-column: 1 / -1; height: 6px; margin: 0 6px; }

/* ---------------- Variantes visuales ---------------- */
.card.level-b {
  background: color-mix(in srgb, var(--card) 88%, var(--fg) 12%);
  border-color: color-mix(in srgb, var(--border) 55%, var(--fg) 45%);
}
.card.level-b .badge { border-color: color-mix(in srgb, var(--border) 65%, var(--fg) 35%); }

.card.level-c {
  background: color-mix(in srgb, var(--card) 88%, var(--fg) 12%);
  border-color: color-mix(in srgb, var(--card) 97%, var(--fg) 3%);
}
.card.level-c .label { color: inherit; }
.card.level-c .badge { border-color: color-mix(in srgb, var(--border) 65%, var(--fg) 35%); }

.card.level-a {
  background: color-mix(in srgb, var(--accent) 10%, var(--card));
  border-color: var(--accent);
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--accent) 35%, transparent),
    inset 6px 0 0 0 var(--accent);
}
.card.level-a .badge {
  border-color: color-mix(in srgb, var(--accent) 50%, #000);
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

/* ---------------- Accesibilidad ---------------- */
.theme-toggle:focus-visible,
.lang a:focus-visible,
.card:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------------- Motion ---------------- */
@media (prefers-reduced-motion: reduce) {
  .card, .theme-toggle, .hero-logo { transition: none !important; }
  .card:hover, .theme-toggle:active { transform: none !important; }
}

/* Textos multilínea configurables */
#subtitle { white-space: pre-line; }