/* ===== Modo claro/oscuro automático para w3.css ===== */

/* Informa al navegador que soportas claro/oscuro */
html { color-scheme: light dark; }

/* Paleta clara por defecto */
:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #666666;
  --card: #ffffff;
  --border: #e5e7eb;
  --link: #0b5fff;
  --link-visited: #7c3aed;
}

/* Paleta oscura automática */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0f;
    --text: #e6e6e6;
    --muted: #9aa0a6;
    --card: #12121a;
    --border: #2a2a35;
    --link: #8ab4f8;
    --link-visited: #c58af9;
  }
}

/* Aplicación general */
html, body {
  background: var(--bg);
  color: var(--text);
}

a { color: var(--link); }
a:visited { color: var(--link-visited); }
small, .muted, .w3-small { color: var(--muted); }

/* Bordes y tablas */
hr,
.w3-border,
.w3-card,
.w3-table-all td, .w3-table-all th {
  border-color: var(--border) !important;
}

/* Fondos claros que deben oscurecerse */
.w3-card, .w3-white, .w3-light-grey, .w3-panel, .w3-container {
  background: var(--card) !important;
  color: var(--text) !important;
}

/* Tablas en oscuro con alternancia */
@media (prefers-color-scheme: dark) {
  .w3-table-all tr:nth-child(even) {
    background: #171722;
  }
}

/* Formularios */
input, select, textarea, button {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

/* Badges y etiquetas */
.w3-badge, .w3-tag {
  background: var(--border);
  color: var(--text);
}

/* Cabecera adaptada */
.w3-theme, .w3-top, .w3-bar.w3-theme {
  background: #1f2937 !important;
  color: #e6e6e6 !important;
}
@media (prefers-color-scheme: light) {
  .w3-theme, .w3-top, .w3-bar.w3-theme {
    background: #0b5fff !important;
    color: #ffffff !important;
  }
}