:root {
  color-scheme: dark;

  --bg: #08090a;
  --panel: #0f1012;
  --panel-2: #141518;
  --border: #23252a;
  --border-strong: #33363d;
  --text: #ecedee;
  --muted: #8b8f98;
  --faint: #7d818a;

  /* Colores de acento de las tarjetas */
  --green: #9be15d;
  --blue: #7aa2ff;
  --orange: #ff8a5c;
  --purple: #b18cff;
  --yellow: #f5c84b;
  --pink: #ff8ad8;

  --radius: 14px;
  --max: 1120px;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* Utilidades */
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: 0.8rem; }
.tiny { font-size: 0.72rem; }

.label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.chip-solid {
  background: var(--panel-2);
  color: var(--text);
}

/* Barra superior */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 600;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--green) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--green) 40%, transparent);
  color: var(--green);
  font-family: var(--mono);
  font-size: 0.75rem;
}

/* Panel de introducción */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.intro {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 24px;
}

.intro-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
  color: var(--muted);
}

.intro-text { flex: 1; min-width: 0; }

.eyebrow {
  margin: 0 0 6px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faint);
}

.intro h1 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.intro p { margin: 0; max-width: 62ch; }

.hl { color: var(--green); }

.intro-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Encabezado de sección */
.section-head {
  display: flex;
  justify-content: space-between;
  margin: 28px 4px 12px;
}

/* Tarjetas */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  --accent: var(--green);
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-2px);
  background: var(--panel-2);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  border-top-color: var(--accent);
}

.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.footer a:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
  border-radius: 2px;
}

.card-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.card-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.85rem;
}

.card-title { flex: 1; min-width: 0; }

.card-title h2 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.badge {
  flex: none;
  padding: 3px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.card-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.card-foot {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.open {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

.open span {
  display: inline-block;
  transition: transform 0.15s ease;
}

.card:hover .open span { transform: translateX(3px); }

/* Pie */
.footer {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.footer a { text-decoration: none; }
.footer a:hover { color: var(--text); }

@media (max-width: 640px) {
  .intro { flex-wrap: wrap; padding: 20px; }
  .intro-tags { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .card, .open span { transition: none; }
}