:root {
  --color-primary: #818cf8;
  --color-primary-strong: #6366f1;
  --color-accent: #34d399;
  --color-background: #0f172a;
  --color-surface: #1e293b;
  --color-surface-2: #273449;
  --color-text: #f1f5f9;
  --color-muted: #94a3b8;
  --color-border: #334155;
  --color-warn: #fbbf24;
  --color-danger: #f87171;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 40px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
}

a { color: var(--color-primary); }
a:hover { color: var(--color-accent); }

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

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus { left: var(--spacing-md); top: var(--spacing-md); }

.site-header {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid var(--color-border);
  z-index: 10;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}
.brand span { color: var(--color-accent); }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs) var(--spacing-md);
  list-style: none;
  margin: 0 0 0 auto;
  padding: 0;
}
.nav-links a {
  color: var(--color-muted);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}
.nav-links a:hover { color: var(--color-text); background: var(--color-surface); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md);
}

.hero { padding: var(--spacing-xl) 0 var(--spacing-lg); }
.hero h1 { font-size: 2rem; margin: 0 0 var(--spacing-sm); line-height: 1.2; }
.hero p { color: var(--color-muted); max-width: 60ch; }

section { padding: var(--spacing-lg) 0; }
h2 { font-size: 1.4rem; margin-bottom: var(--spacing-md); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.grid-2 {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
}
@media (min-width: 960px) {
  .grid-2 { grid-template-columns: 1fr 2fr; }
  .hero h1 { font-size: 2.6rem; }
}

label { display: block; font-weight: 600; margin-bottom: var(--spacing-xs); }

input[type="search"], select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-background);
  color: var(--color-text);
  font-size: 1rem;
}
input[type="search"]:focus, select:focus { border-color: var(--color-primary); outline: none; }

label.check-estricto {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  font-weight: 600;
  margin-bottom: 0;
  min-height: 42px;
}
label.check-estricto input { width: 18px; height: 18px; accent-color: var(--color-primary); cursor: pointer; }

.controls {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: 1fr;
  margin-bottom: var(--spacing-md);
}
@media (min-width: 640px) {
  .controls { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
  .controls > div:first-child { grid-column: span 2; }
}

.hint {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin: 0 0 var(--spacing-md);
}

/* Buscador con sugerencias desplegables */
.search-wrap { position: relative; }
.sugerencias {
  position: absolute;
  z-index: 20;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  margin: 0;
  padding: var(--spacing-xs);
  list-style: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  max-height: 320px;
  overflow-y: auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}
.sugerencias[hidden] { display: none; }
.sug-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-sm);
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--color-text);
  font: inherit;
  cursor: pointer;
}
.sug-item:hover, .sug-item:focus { background: var(--color-surface-2); outline: none; }
.sug-item small { color: var(--color-muted); white-space: nowrap; }
.sug-info {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: 8px 10px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.ejemplos {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--color-primary-strong);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}
.btn:hover { background: var(--color-primary); }
.btn:active { transform: scale(0.98); }
.btn[disabled] { opacity: 0.6; cursor: wait; }

.source-toggle { display: flex; gap: var(--spacing-sm); }
.chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
}
.chip[aria-pressed="true"] {
  background: var(--color-primary-strong);
  color: white;
  border-color: var(--color-primary-strong);
}

.ref-card { display: grid; gap: var(--spacing-md); }
.precio-linea { color: var(--color-muted); font-size: .9rem; }
.ref-head { display: flex; gap: var(--spacing-md); align-items: center; }
.ref-head img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
}

.tags { display: flex; flex-wrap: wrap; gap: var(--spacing-xs); margin: var(--spacing-sm) 0; }
.tag {
  font-size: 0.8rem;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--color-surface-2);
  color: var(--color-muted);
}

.metrics { display: grid; gap: var(--spacing-sm); }
.metric { font-size: 0.9rem; }
.metric-top { display: flex; justify-content: space-between; margin-bottom: var(--spacing-xs); }
.metric-top strong { font-variant-numeric: tabular-nums; }
.bar {
  height: 8px;
  border-radius: 999px;
  background: var(--color-surface-2);
  overflow: hidden;
}
.bar > span { display: block; height: 100%; background: var(--color-primary); border-radius: 999px; }
.bar.user > span { background: var(--color-accent); }
.metric small { color: var(--color-muted); }

.comp-list { list-style: none; margin: var(--spacing-md) 0 0; padding: 0; display: grid; gap: var(--spacing-sm); }
.comp {
  display: grid;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.comp-head { display: flex; align-items: center; gap: var(--spacing-sm); flex-wrap: wrap; }
.comp-head h3 { margin: 0; font-size: 1.05rem; }
.score { font-weight: 700; font-variant-numeric: tabular-nums; }
.badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 10px;
  border-radius: 999px;
}
.badge.directo { background: rgba(52, 211, 153, 0.15); color: var(--color-accent); }
.badge.secundario { background: rgba(251, 191, 36, 0.15); color: var(--color-warn); }
.badge.relacionado { background: rgba(148, 163, 184, 0.15); color: var(--color-muted); }
.why { color: var(--color-muted); font-size: 0.9rem; margin: 0; }

.state {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}
.state.error { color: var(--color-danger); border-color: var(--color-danger); }

.spinner {
  width: 28px;
  height: 28px;
  margin: 0 auto var(--spacing-sm);
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
  * { transition: none; }
}

.methodology ol, .methodology ul { padding-left: var(--spacing-lg); }
.methodology li { margin-bottom: var(--spacing-sm); }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td {
  text-align: left;
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}
.data-table th { color: var(--color-muted); font-weight: 600; }
.data-table caption {
  text-align: left;
  color: var(--color-muted);
  font-size: 0.85rem;
  padding-bottom: var(--spacing-sm);
}

.table-wrap { overflow-x: auto; margin: var(--spacing-md) 0; }

.tabla-comparativa .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tabla-comparativa small { color: var(--color-muted); font-weight: 400; }
.tabla-comparativa .fila-ref { background: var(--color-surface-2); }
.tabla-comparativa .fila-ref td { font-weight: 600; }

.delta.pos { color: var(--color-accent); }
.delta.neg { color: var(--color-danger); }
.delta.neu { color: var(--color-muted); }

.insights h3 { margin-top: 0; }
.insights ul { padding-left: var(--spacing-lg); margin: 0 0 var(--spacing-sm); }
.insights li { margin-bottom: var(--spacing-xs); }

footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) var(--spacing-md);
  color: var(--color-muted);
  font-size: 0.85rem;
  text-align: center;
}