/* ==========================================================================
   COMPONENTS — piezas reutilizables: botones, chips, tarjetas, header, footer.
   ========================================================================== */

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.4rem;
  font-family: var(--font-display); font-weight: 700; font-size: var(--fs-sm);
  border-radius: 999px; border: 2px solid transparent;
  text-decoration: none !important;
  transition: transform .2s var(--ease), background .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: var(--ink); box-shadow: 0 8px 24px rgba(56, 189, 248, .35); }
.btn--primary:hover { background: #5cc9fa; }
.btn--ghost { border-color: rgba(255,255,255,.28); color: var(--text-on-dark); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: var(--ink-3); }
.btn--outline { border-color: var(--line); color: var(--text); background: var(--surface); }
.btn--outline:hover { border-color: var(--accent-deep); }
.btn--sm { padding: .55rem 1.05rem; }

/* ---------- Header / nav ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--header-h);
  display: flex; align-items: center;
  transition: background .3s, box-shadow .3s, backdrop-filter .3s;
}
.header.is-scrolled {
  background: rgba(10, 16, 32, .86);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,.07);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); }
.brand {
  display: flex; align-items: center; gap: .65rem;
  font-family: var(--font-display); font-weight: 800; color: #fff; text-decoration: none !important;
}
.brand__mark {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--ink); font-size: .9rem;
}
.brand__name { font-size: 1rem; }

.nav__list { display: flex; align-items: center; gap: var(--space-5); }
.nav__link {
  color: var(--text-on-dark-soft); font-weight: 600; font-size: var(--fs-sm);
  text-decoration: none !important; padding: .35rem 0; border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav__link:hover, .nav__link.is-active { color: #fff; border-color: var(--accent); }

.nav-toggle {
  display: none; background: none; border: 0; color: #fff; padding: .5rem; margin-right: -.5rem;
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  display: block; width: 24px; height: 2px; background: currentColor; border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before, .nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -7px; }
.nav-toggle__bars::after  { top: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after  { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    background: var(--ink); padding: var(--space-5) var(--gutter) var(--space-6);
    border-bottom: 1px solid var(--ink-3);
    transform: translateY(-120%); transition: transform .3s var(--ease);
    visibility: hidden;
  }
  .nav.is-open { transform: none; visibility: visible; }
  .nav__list { flex-direction: column; align-items: stretch; gap: var(--space-3); }
  .nav__link { display: block; padding: .6rem 0; font-size: var(--fs-base); }
}

/* ---------- Chips ---------- */
.chip {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .4rem .85rem; border-radius: 999px;
  font-size: var(--fs-xs); font-weight: 600;
  background: var(--surface); border: 1px solid var(--line); color: var(--text-soft);
}
button.chip { transition: all .2s var(--ease); }
button.chip:hover { border-color: var(--accent-deep); color: var(--accent-deep); }
button.chip[aria-pressed="true"] {
  background: var(--ink); border-color: var(--ink); color: #fff;
}
button.chip[aria-pressed="true"]::before { content: "✓"; color: var(--accent); }
.chip--dark { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.14); color: var(--text-on-dark-soft); }

/* ---------- Tarjeta genérica ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: var(--space-6); box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #cdd7ea; }

/* ---------- Footer ---------- */
.footer { background: var(--ink); color: var(--text-on-dark-soft); padding-block: var(--space-6); font-size: var(--fs-sm); }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); }
.footer a { color: var(--text-on-dark); }

/* ---------- Selector de idioma ---------- */
.lang-switch { display: flex; align-items: center; gap: .15rem; font-family: var(--font-display); font-size: var(--fs-xs); font-weight: 800; }
.lang-switch span, .lang-switch a { padding: .25rem .55rem; border-radius: 999px; text-decoration: none !important; }
.lang-switch span { background: rgba(255,255,255,.14); color: #fff; }
.lang-switch a { color: var(--text-on-dark-soft); }
.lang-switch a:hover { color: var(--accent); }