/* The presentation page. Shares its tokens with the app via base.css. */

/* ------------------------------------------------------------------ *
 * Language switching
 *
 * Both languages ship in the markup and CSS hides the inactive one, so the
 * page reads correctly before any script runs and stays copy-pasteable.
 * ------------------------------------------------------------------ */

[data-page-lang="es"] [lang="en"],
[data-page-lang="en"] [lang="es"] { display: none; }

body {
  font-size: 16px;
  line-height: 1.65;
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
}

main { display: block; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem max(1.25rem, calc(50vw - 32rem));
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 650;
  font-size: 15px;
  color: var(--fg);
  text-decoration: none;
}

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.lang-switch {
  display: flex;
  padding: 2px;
  gap: 2px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.lang-switch button {
  padding: 0.15rem 0.6rem;
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.03em;
  color: var(--fg-subtle);
  border-radius: 999px;
}
.lang-switch button[aria-pressed="true"] { background: var(--accent); color: #fff; }

.ghost-link {
  font-size: 13.5px;
  color: var(--fg-muted);
  text-decoration: none;
}
.ghost-link:hover { color: var(--fg); }

/* ------------------------------------------------------------------ *
 * Sections
 * ------------------------------------------------------------------ */

.hero, .band, .closing {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 max(1.25rem, calc(50vw - 32rem));
}
.hero { padding-top: 5.5rem; padding-bottom: 4.5rem; text-align: center; }

.eyebrow {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  text-wrap: balance;
}

.lede {
  max-width: 42rem;
  margin: 0 auto 2rem;
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  color: var(--fg-muted);
  text-wrap: pretty;
}
.lede em { color: var(--fg); font-style: italic; }

.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }

.cta-primary, .cta-secondary {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  text-decoration: none;
  transition: transform 120ms var(--ease), filter 120ms var(--ease);
}
.cta-primary { background: var(--accent); color: #fff; }
.cta-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.cta-secondary { color: var(--fg); border: 1px solid var(--border-strong); }
.cta-secondary:hover { background: var(--bg-hover); }

.cta-note { margin-top: 1.1rem; font-size: 13px; color: var(--fg-subtle); }

.band { padding-top: 4rem; padding-bottom: 4rem; border-top: 1px solid var(--border); }
.band h2, .closing h2 {
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 680;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  text-wrap: balance;
}

.prose { max-width: 44rem; }
.prose p { margin-bottom: 1.1rem; color: var(--fg-muted); text-wrap: pretty; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--fg); font-weight: 650; }
.prose em { color: var(--fg); }
.prose code {
  font-family: var(--mono-font);
  font-size: 0.88em;
  padding: 0.1em 0.35em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 5px;
}
.aside {
  padding-left: 1rem;
  border-left: 2px solid var(--border-strong);
  font-size: 14.5px;
}

/* ------------------------------------------------------------------ *
 * Cards and stats
 * ------------------------------------------------------------------ */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: 1rem;
}
.card {
  padding: 1.25rem;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.card h3 { font-size: 15px; font-weight: 650; margin-bottom: 0.5rem; }
.card p { font-size: 14px; color: var(--fg-muted); text-wrap: pretty; }
.card code, .card kbd {
  font-family: var(--mono-font);
  font-size: 0.86em;
  padding: 0.08em 0.3em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat {
  padding: 1rem;
  text-align: center;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 12.5px; color: var(--fg-subtle); }

/* ------------------------------------------------------------------ *
 * About
 * ------------------------------------------------------------------ */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}
@media (max-width: 780px) {
  .about-grid { grid-template-columns: minmax(0, 1fr); }
}

.links { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.links a:hover { border-bottom-color: currentColor; }

.sibling-label {
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: 0.6rem;
}
.sibling-card {
  display: block;
  padding: 1.1rem;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: border-color 120ms var(--ease);
}
.sibling-card:hover { border-color: var(--accent); }
.sibling-card strong { display: block; font-size: 15px; margin-bottom: 0.35rem; }
.sibling-card span { font-size: 13.5px; color: var(--fg-muted); }

/* ------------------------------------------------------------------ *
 * Closing and footer
 * ------------------------------------------------------------------ */

.closing {
  padding-top: 5rem;
  padding-bottom: 5rem;
  text-align: center;
  border-top: 1px solid var(--border);
}
.closing h2 { max-width: 34rem; margin-inline: auto; margin-bottom: 1.75rem; }

.site-footer {
  padding: 2rem max(1.25rem, calc(50vw - 32rem));
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--fg-subtle);
}
.site-footer a { color: var(--fg-muted); text-decoration: none; margin-left: 0.4rem; }
.site-footer a:hover { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  .cta-primary:hover { transform: none; }
}