/* ==========================================================================
   VARIABLES Y TEMA (Cumplimiento de Contraste WCAG 2.1 AA/AAA)
   ========================================================================== */
:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --primary-color: #b00020; /* Ratio de contraste > 7:1 */
  --primary-hover: #7a0016;
  --border-color: #cccccc;
  --card-bg: #f8f9fa;
  --focus-outline: #d9381e;
  --font-family: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Mono", "Source Code Pro", Menlo, Consolas, monospace;
  --line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #f0f0f0;
    --primary-color: #ff8a80;
    --primary-hover: #ffab91;
    --border-color: #444444;
    --card-bg: #1e1e1e;
    --focus-outline: #ffb74d;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   VERSIÓN EN POSITIVO (fondo blanco, letras negras; gana al modo oscuro)
   ========================================================================== */
.positive {
  --bg-color: #ffffff;
  --text-color: #000000;
  --primary-color: #b00020;
  --primary-hover: #7a0016;
  --border-color: #cccccc;
  --card-bg: #f8f9fa;
  --focus-outline: #d9381e;
}

/* ==========================================================================
   ESTILOS BASE Y ACCESIBILIDAD
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  line-height: var(--line-height);
  font-size: 1.125rem;
  padding: 1rem;
}

.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  background: var(--primary-color);
  color: var(--bg-color);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  text-decoration: none;
  font-weight: bold;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus {
  top: 0;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-outline);
  outline-offset: 3px;
}

/* ==========================================================================
   ESTRUCTURA DE CONTENIDO
   ========================================================================== */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.header-actions {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.lang-toggle,
.contrast-toggle {
  background: var(--card-bg);
  color: var(--text-color);
  border: 2px solid var(--primary-color);
  padding: 0.6rem 1.25rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  border-radius: 4px;
}

.lang-toggle:hover,
.contrast-toggle:hover,
.contrast-toggle[aria-pressed="true"] {
  background: var(--primary-color);
  color: var(--bg-color);
}

h1 {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.profiles-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.profiles-list a,
.pub-link {
  color: var(--primary-color);
  text-decoration: underline;
  font-weight: bold;
}

.profiles-list a:hover,
.pub-link:hover {
  color: var(--primary-hover);
}

section {
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.6rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.3rem;
  margin-bottom: 1.2rem;
}

.item-card {
  background-color: var(--card-bg);
  border-left: 4px solid var(--primary-color);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  border-radius: 0 4px 4px 0;
}

.item-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.item-meta {
  font-style: italic;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

ul.accessible-list {
  padding-left: 1.5rem;
}

ul.accessible-list li {
  margin-bottom: 0.5rem;
}

cite {
  font-style: normal;
  font-weight: 600;
}

footer {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  margin-top: 3rem;
  font-size: 0.95rem;
  text-align: center;
}

.footer-badge {
  margin-top: 1rem;
}

.footer-badge img {
  height: 1.5em;
  vertical-align: middle;
}