/* ==========================================================================
   Tema (claro / oscuro) — tokens de color Material-3-ish reutilizados por
   includes/tailwind_config.php. Cambiar de tema solo alterna la clase
   `dark` en <html>; todas las utilidades bg-, text- y border- ya definidas
   en el resto del sistema responden automáticamente porque apuntan a estas
   variables.

   Paleta neutra unificada en Slate (antes claro usaba Gray y oscuro Slate,
   lo que generaba una discontinuidad sutil al cambiar de tema). Los acentos
   de marca (índigo/esmeralda/violeta/ámbar/cian/rosa) se mantienen para no
   romper las clases badge-, avatar- y panel-tint- usadas en toda la app.
   ========================================================================== */
:root {
  --tk-surface-container-highest: #e2e8f0; /* Slate 200 */
  --tk-primary: #4f46e5; /* Indigo 600 */
  --tk-on-primary: #ffffff;
  --tk-surface-variant: #e2e8f0; /* Slate 200 */
  --tk-surface: #ffffff;
  --tk-inverse-on-surface: #f8fafc; /* Slate 50 */
  --tk-surface-tint: #6366f1; /* Indigo 500 */
  --tk-primary-container: #4338ca; /* Indigo 700 (hover) */
  --tk-primary-fixed: #eef2ff; /* Indigo 50 */
  --tk-on-primary-container: #ffffff;
  --tk-on-secondary-fixed: #0f172a;
  --tk-secondary-fixed: #e2e8f0;
  --tk-on-tertiary-fixed: #022c22;
  --tk-inverse-primary: #a5b4fc; /* Indigo 300 */
  --tk-secondary: #64748b; /* Slate 500 */
  --tk-inverse-surface: #1e293b; /* Slate 800 */
  --tk-on-primary-fixed-variant: #312e81; /* Indigo 900 */
  --tk-on-surface: #0f172a; /* Slate 900 */
  --tk-tertiary-fixed-dim: #6ee7b7; /* Emerald 300 */
  --tk-error: #dc2626; /* Red 600 */
  --tk-on-tertiary: #ffffff;
  --tk-on-secondary-container: #475569; /* Slate 600 */
  --tk-surface-dim: #e2e8f0;
  --tk-on-error: #ffffff;
  --tk-tertiary-container: #10b981; /* Emerald 500 */
  --tk-surface-container-high: #e2e8f0; /* Slate 200 */
  --tk-surface-container: #f1f5f9; /* Slate 100 */
  --tk-secondary-fixed-dim: #94a3b8; /* Slate 400 */
  --tk-on-background: #0f172a;
  --tk-surface-container-low: #f8fafc; /* Slate 50 */
  --tk-tertiary: #059669; /* Emerald 600 */
  --tk-on-primary-fixed: #1e1b4b; /* Indigo 950 */
  --tk-on-surface-variant: #475569; /* Slate 600 — contraste AA sobre superficies claras */
  --tk-outline-variant: #e2e8f0; /* Slate 200 */
  --tk-background: #f8fafc; /* Slate 50 — antes blanco puro, ahora con leve profundidad */
  --tk-on-secondary: #ffffff;
  --tk-tertiary-fixed: #a7f3d0; /* Emerald 200 */
  --tk-outline: #94a3b8; /* Slate 400 */
  --tk-surface-bright: #ffffff;
  --tk-error-container: #fee2e2;
  --tk-on-error-container: #7f1d1d;
  --tk-on-secondary-fixed-variant: #334155;
  --tk-primary-fixed-dim: #a5b4fc; /* Indigo 300 */
  --tk-on-tertiary-container: #ecfdf5; /* Emerald 50 */
  --tk-surface-container-lowest: #ffffff;
  --tk-on-tertiary-fixed-variant: #047857; /* Emerald 700 */
  --tk-secondary-container: #e2e8f0;

  --tk-page-bg: #f8fafc; /* Slate 50 */
  --tk-badge-cerrado-bg: rgba(15, 23, 42, 0.08);
  --tk-badge-cerrado-fg: #0f172a;
  --tk-comment-internal-bg: #fffbeb; /* Amber 50 */
  --tk-comment-public-bg: #eef2ff; /* Indigo 50 */
  --tk-card-border: #e2e8f0; /* Slate 200 */

  /* Acentos adicionales para dar variedad de matices a iconos, avatares y
     tarjetas (más allá de primary/tertiary) sin perder legibilidad. */
  --tk-accent-violet: #9333ea; /* Purple 600, más vivo */
  --tk-accent-amber: #f59e0b; /* Amber 500, más vivo */
  --tk-accent-cyan: #06b6d4; /* Cyan 500, más vivo */
  --tk-accent-rose: #e11d48;

  --tk-gradient-brand: linear-gradient(135deg, #4f46e5 0%, #9333ea 55%, #ec4899 100%);
  --tk-gradient-hero: linear-gradient(120deg, #4338ca 0%, #6d28d9 55%, #7e22ce 100%);
  --tk-shadow-color: 222deg 47% 25%;
}

html.dark {
  --tk-primary: #6366f1; /* Indigo 500 */
  --tk-on-primary: #ffffff;
  --tk-primary-container: #818cf8; /* Indigo 400 (hover, más claro sobre fondo oscuro) */
  --tk-on-primary-container: #1e1b4b; /* Indigo 950 */
  --tk-surface: #0f172a; /* Slate 900 */
  --tk-background: #0b1120;
  --tk-on-background: #f1f5f9;
  --tk-on-surface: #f1f5f9; /* Slate 100 */
  --tk-on-surface-variant: #94a3b8; /* Slate 400 */
  --tk-surface-variant: #334155; /* Slate 700 */
  --tk-surface-dim: #0b1120;
  --tk-surface-bright: #334155;
  --tk-surface-container-lowest: #141e33; /* leve elevación sobre el fondo, evita el look "plano" */
  --tk-surface-container-low: #172033;
  --tk-surface-container: #1c2740;
  --tk-surface-container-high: #24304d;
  --tk-surface-container-highest: #334155;
  --tk-inverse-surface: #f1f5f9;
  --tk-inverse-on-surface: #1e293b;
  --tk-inverse-primary: #4f46e5;
  --tk-outline: #64748b; /* Slate 500 */
  --tk-outline-variant: #1e293b; /* Slate 800 */
  --tk-error: #f87171; /* Red 400 */
  --tk-on-error: #450a0a;
  --tk-error-container: #7f1d1d;
  --tk-on-error-container: #fee2e2;
  --tk-secondary: #94a3b8;
  --tk-on-secondary: #1e293b;
  --tk-secondary-container: #334155;
  --tk-on-secondary-container: #e2e8f0;
  --tk-tertiary: #34d399; /* Emerald 400 */
  --tk-on-tertiary: #022c22;
  --tk-tertiary-container: #065f46; /* Emerald 800 */
  --tk-on-tertiary-container: #d1fae5; /* Emerald 100 */

  --tk-page-bg: #0b1120;
  --tk-badge-cerrado-bg: rgba(241, 245, 249, 0.1);
  --tk-badge-cerrado-fg: #f1f5f9;
  --tk-comment-internal-bg: rgba(217, 119, 6, 0.12);
  --tk-comment-public-bg: rgba(99, 102, 241, 0.14);
  --tk-card-border: #1e293b; /* Slate 800 */

  --tk-accent-violet: #c084fc; /* Purple 400 */
  --tk-accent-amber: #fbbf24;
  --tk-accent-cyan: #22d3ee;
  --tk-accent-rose: #fb7185;

  --tk-gradient-brand: linear-gradient(135deg, #6366f1 0%, #a855f7 55%, #f472b6 100%);
  --tk-gradient-hero: linear-gradient(120deg, #3730a3 0%, #5b21b6 55%, #6b21a8 100%);
  --tk-shadow-color: 222deg 60% 3%;
}

html.dark, html.dark body {
  color-scheme: dark;
}

* {
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

html {
  overflow-x: hidden;
}
body {
  background-color: var(--tk-page-bg);
  overflow-x: hidden;
  max-width: 100vw;
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.material-symbols-outlined.fill {
  font-variation-settings: 'FILL' 1;
}

/* Foco visible consistente en toda la app (accesibilidad) — reemplaza el
   outline por defecto del navegador por uno alineado a la marca. */
a:focus-visible,
button:focus-visible,
.field:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--tk-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ==========================================================================
   Utilidades compartidas
   ========================================================================== */
.ambient-shadow {
  box-shadow: 0 20px 40px -12px hsl(var(--tk-shadow-color) / 0.16), 0 8px 16px -8px hsl(var(--tk-shadow-color) / 0.08);
}
html.dark .ambient-shadow {
  box-shadow: 0 20px 40px -12px hsl(var(--tk-shadow-color) / 0.55), 0 8px 16px -8px hsl(var(--tk-shadow-color) / 0.4);
}

.urgent-shadow {
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.16);
}
html.dark .urgent-shadow {
  box-shadow: 0 8px 24px rgba(248, 113, 113, 0.22);
}

.card-border {
  border: 1px solid var(--tk-card-border);
}

.scrollbar-thin::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.scrollbar-thin::-webkit-scrollbar-thumb {
  background-color: var(--tk-outline-variant);
  border-radius: 8px;
}

/* Marca — cuadrado redondeado con degradado de marca, reemplaza los
   `bg-primary` planos usados antes en el logo del header público y en
   login/registro. */
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 30%;
  background: var(--tk-gradient-brand);
  color: #ffffff;
  box-shadow: 0 6px 16px -4px rgba(79, 70, 229, 0.45);
}

/* ==========================================================================
   Hero a todo lo ancho con degradado de marca — para landing/secciones de
   alto impacto. El resto de la app sigue usando fondos neutros; esto es
   deliberadamente la sección "punch" de la página pública.
   ========================================================================== */
.hero-band {
  background: var(--tk-gradient-hero);
  position: relative;
  overflow: hidden;
  color: #ffffff;
}
.hero-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.16) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(ellipse 65% 55% at 50% 20%, #000 40%, transparent 100%);
  mask-image: radial-gradient(ellipse 65% 55% at 50% 20%, #000 40%, transparent 100%);
  pointer-events: none;
}

.badge-glass {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.28);
  backdrop-filter: blur(4px);
}

.btn-hero-primary {
  background: #ffffff;
  color: var(--tk-primary-container);
  box-shadow: 0 8px 20px -6px rgba(15, 23, 42, 0.35);
}
.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 24px -6px rgba(15, 23, 42, 0.4);
}

.btn-hero-outline {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
  color: #ffffff;
}
.btn-hero-outline:hover {
  background: rgba(255,255,255,0.2);
}

/* Cabecera "glass": fondo semitransparente + blur, más contemporáneo que un
   sólido plano, y sigue leyendo el color de superficie del tema activo. */
.app-header {
  background-color: color-mix(in srgb, var(--tk-surface-container-lowest) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Patrón de puntos sutil para secciones de landing (hero, CTA), aporta
   textura sin competir con el contenido. */
.dot-grid-bg {
  background-image: radial-gradient(var(--tk-outline-variant) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 100%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* ==========================================================================
   Badges de estado / prioridad / SLA
   ========================================================================== */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid rgba(0, 0, 0, 0.06);
}
html.dark .badge-pill {
  border-color: rgba(255, 255, 255, 0.1);
}

.badge-nuevo, .badge-secondary { background-color: rgba(100,116,139,0.16); color: var(--tk-secondary); }
.badge-asignado, .badge-info { background-color: rgba(79,70,229,0.18); color: var(--tk-primary); }
.badge-en_progreso, .badge-primary { background-color: rgba(147,51,234,0.18); color: var(--tk-accent-violet); }
.badge-en_espera, .badge-warning { background-color: rgba(245,158,11,0.2); color: var(--tk-accent-amber); }
.badge-resuelto, .badge-success { background-color: rgba(5,150,105,0.2); color: var(--tk-tertiary); }
.badge-cerrado, .badge-dark { background-color: var(--tk-badge-cerrado-bg); color: var(--tk-badge-cerrado-fg); }
.badge-danger { background-color: rgba(220,38,38,0.16); color: var(--tk-error); }
.badge-violet { background-color: rgba(147,51,234,0.18); color: var(--tk-accent-violet); }
.badge-cyan { background-color: rgba(6,182,212,0.18); color: var(--tk-accent-cyan); }

/* ==========================================================================
   Avatares de iniciales — paleta variada asignada por hash del nombre
   (ver avatar_color() en includes/functions.php) para que las listas de
   usuarios/comentarios no se vean monocromáticas.
   ========================================================================== */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  font-weight: 700;
  flex-shrink: 0;
}
.avatar-blue { background-color: rgba(79,70,229,0.16); color: var(--tk-primary); }
.avatar-teal { background-color: rgba(5,150,105,0.16); color: var(--tk-tertiary); }
.avatar-violet { background-color: rgba(147,51,234,0.16); color: var(--tk-accent-violet); }
.avatar-amber { background-color: rgba(245,158,11,0.16); color: var(--tk-accent-amber); }
.avatar-cyan { background-color: rgba(6,182,212,0.16); color: var(--tk-accent-cyan); }
.avatar-rose { background-color: rgba(225,29,72,0.16); color: var(--tk-accent-rose); }

/* ==========================================================================
   Bloques con fondo tenue a juego con su acento (tarjetas KPI, features,
   etc.) — mismo mapa de color que .avatar-*, para que el ícono y el fondo
   del bloque se sientan como una sola familia de color en vez de un ícono
   de color sobre una tarjeta blanca plana.
   ========================================================================== */
.panel-tint-blue, .panel-tint-teal, .panel-tint-violet, .panel-tint-amber, .panel-tint-cyan, .panel-tint-rose {
  border-top-width: 3px;
}
.panel-tint-blue { background-color: rgba(79,70,229,0.09); border-color: rgba(79,70,229,0.22); border-top-color: var(--tk-primary); }
.panel-tint-teal { background-color: rgba(5,150,105,0.09); border-color: rgba(5,150,105,0.22); border-top-color: var(--tk-tertiary); }
.panel-tint-violet { background-color: rgba(147,51,234,0.09); border-color: rgba(147,51,234,0.22); border-top-color: var(--tk-accent-violet); }
.panel-tint-amber { background-color: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.24); border-top-color: var(--tk-accent-amber); }
.panel-tint-cyan { background-color: rgba(6,182,212,0.09); border-color: rgba(6,182,212,0.22); border-top-color: var(--tk-accent-cyan); }
.panel-tint-rose { background-color: rgba(225,29,72,0.09); border-color: rgba(225,29,72,0.22); border-top-color: var(--tk-accent-rose); }
html.dark .panel-tint-blue { background-color: rgba(99,102,241,0.14); border-color: rgba(99,102,241,0.3); }
html.dark .panel-tint-teal { background-color: rgba(52,211,153,0.14); border-color: rgba(52,211,153,0.3); }
html.dark .panel-tint-violet { background-color: rgba(192,132,252,0.14); border-color: rgba(192,132,252,0.3); }
html.dark .panel-tint-amber { background-color: rgba(251,191,36,0.14); border-color: rgba(251,191,36,0.3); }
html.dark .panel-tint-cyan { background-color: rgba(34,211,238,0.14); border-color: rgba(34,211,238,0.3); }
html.dark .panel-tint-rose { background-color: rgba(251,113,133,0.14); border-color: rgba(251,113,133,0.3); }

/* Ícono sólido para usar dentro de un bloque ya teñido (.panel-tint-*),
   evita el efecto "tinte sobre tinte" y da más contraste al ícono. */
.avatar-solid-blue { background-color: var(--tk-primary); color: var(--tk-on-primary); }
.avatar-solid-teal { background-color: var(--tk-tertiary); color: var(--tk-on-tertiary); }
.avatar-solid-violet { background-color: var(--tk-accent-violet); color: #ffffff; }
html.dark .avatar-solid-violet { color: #211347; }
.avatar-solid-amber { background-color: var(--tk-accent-amber); color: #ffffff; }
html.dark .avatar-solid-amber { color: #2b1c00; }
.avatar-solid-cyan { background-color: var(--tk-accent-cyan); color: #ffffff; }
html.dark .avatar-solid-cyan { color: #00272c; }
.avatar-solid-rose { background-color: var(--tk-accent-rose); color: #ffffff; }
html.dark .avatar-solid-rose { color: #390019; }

/* ==========================================================================
   Comentarios internos / públicos
   ========================================================================== */
.comment-internal {
  background-color: var(--tk-comment-internal-bg);
  border-left: 4px solid #f1c21b;
  border-radius: 0.5rem;
}

.comment-public {
  background-color: var(--tk-comment-public-bg);
  border-left: 4px solid var(--tk-primary);
  border-radius: 0.5rem;
}

.subtask-done {
  text-decoration: line-through;
  color: var(--tk-outline);
}

/* ==========================================================================
   Navegación
   ========================================================================== */
.nav-link-active {
  color: #ffffff;
  font-weight: 700;
  background-color: rgba(255,255,255,0.14);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
  position: relative;
}
.nav-link-active::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, #a5b4fc, #f0abfc);
}

/* Sidebar "chrome" fijo (independiente del tema claro/oscuro de la app): un
   degradado índigo profundo con leve variación tonal para dar profundidad
   sin caer en un arcoíris multicolor, más un filo interior sutil. */
.sidebar-gradient {
  background: linear-gradient(165deg, #211c5e 0%, #1e1b4b 45%, #171442 100%);
  box-shadow: inset -1px 0 0 rgba(255,255,255,0.06);
}

/* Manchas de color difuminadas para fondos de sección (landing, etc.) */
.color-blob {
  position: absolute;
  border-radius: 9999px;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
}
html.dark .color-blob {
  opacity: 0.25;
}

/* Resplandor sutil en la esquina del hero + degradado vertical muy suave de
   blanco a gris extremadamente claro hacia abajo (look plano/minimal). */
.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(79, 70, 229, 0.12), transparent 55%),
    radial-gradient(circle at 100% 20%, rgba(236, 72, 153, 0.08), transparent 50%),
    linear-gradient(to bottom, #ffffff 0%, #ffffff 55%, #f8fafc 100%);
  pointer-events: none;
}
html.dark .hero-glow {
  background:
    radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.22), transparent 55%),
    radial-gradient(circle at 100% 20%, rgba(244, 114, 182, 0.12), transparent 50%),
    linear-gradient(to bottom, transparent 0%, transparent 55%, rgba(255, 255, 255, 0.03) 100%);
}

/* ==========================================================================
   Componentes reutilizables (botones, inputs, cards) — clases planas para
   mantener consistencia sin repetir cadenas largas de utilidades en cada
   página.
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0.75rem 1.5rem;
  border-radius: 0.625rem;
  font-family: Inter, sans-serif;
  font-size: 14px;
  font-weight: 600;
  line-height: 20px;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease-in-out;
}
.btn:active {
  transform: translateY(1px);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-sm {
  padding: 5px 12px;
  font-size: 13px;
}
.btn-block {
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--tk-primary), var(--tk-primary-container));
  color: var(--tk-on-primary);
  box-shadow: 0 4px 10px -2px rgba(79, 70, 229, 0.35), 0 2px 4px -1px rgba(79, 70, 229, 0.12);
}
.btn-primary:hover {
  filter: brightness(1.06);
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -6px rgba(79, 70, 229, 0.4), 0 4px 8px -2px rgba(79, 70, 229, 0.2);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--tk-outline-variant);
  color: var(--tk-on-surface);
}
.btn-outline:hover {
  background-color: var(--tk-surface-container-low);
  border-color: var(--tk-outline);
}

.btn-outline-primary {
  background-color: transparent;
  border-color: var(--tk-primary);
  color: var(--tk-primary);
}
.btn-outline-primary:hover {
  background-color: rgba(79, 70, 229, 0.08);
}

.btn-outline-danger {
  background-color: transparent;
  border-color: var(--tk-error);
  color: var(--tk-error);
}
.btn-outline-danger:hover {
  background-color: rgba(220, 38, 38, 0.08);
}

.btn-outline-success {
  background-color: transparent;
  border-color: var(--tk-tertiary);
  color: var(--tk-tertiary);
}
.btn-outline-success:hover {
  background-color: rgba(5, 150, 105, 0.08);
}

.btn-success {
  background-color: var(--tk-tertiary);
  color: var(--tk-on-tertiary);
}
.btn-success:hover {
  opacity: 0.9;
}

.btn-ghost {
  background-color: transparent;
  color: var(--tk-on-surface-variant);
}
.btn-ghost:hover {
  background-color: var(--tk-surface-container-low);
}

.field {
  width: 100%;
  padding: 9px 12px;
  border-radius: 0.625rem;
  border: 1px solid var(--tk-outline-variant);
  background-color: var(--tk-surface-container-lowest);
  color: var(--tk-on-surface);
  font-family: Inter, sans-serif;
  font-size: 14px;
  line-height: 20px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field::placeholder {
  color: var(--tk-outline);
}
.field:focus {
  border-color: var(--tk-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.field-sm {
  padding: 6px 8px;
  font-size: 13px;
}
.field:disabled {
  background-color: var(--tk-surface-container-low);
  color: var(--tk-outline);
}

.label {
  display: block;
  margin-bottom: 4px;
  font-family: Inter, sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--tk-on-surface-variant);
}

.panel {
  background-color: var(--tk-surface-container-lowest);
  border: 1px solid var(--tk-outline-variant);
  border-radius: 1rem;
  box-shadow: 0 1px 2px 0 hsl(var(--tk-shadow-color) / 0.04);
  transition: all 0.25s ease;
}
.panel:hover {
  box-shadow: 0 20px 30px -8px hsl(var(--tk-shadow-color) / 0.12), 0 8px 12px -6px hsl(var(--tk-shadow-color) / 0.06);
  transform: translateY(-3px);
  border-color: var(--tk-outline);
}
html.dark .panel:hover {
  box-shadow: 0 20px 30px -8px hsl(var(--tk-shadow-color) / 0.6);
}

.alert {
  padding: 12px 14px;
  border-radius: 0.625rem;
  font-size: 13px;
  border: 1px solid transparent;
}
.alert-success {
  background-color: rgba(5, 150, 105, 0.1);
  border-color: rgba(5, 150, 105, 0.3);
  color: var(--tk-tertiary);
}
.alert-error {
  background-color: rgba(220, 38, 38, 0.1);
  border-color: rgba(220, 38, 38, 0.3);
  color: var(--tk-error);
}
.alert-info {
  background-color: rgba(79, 70, 229, 0.08);
  border-color: rgba(79, 70, 229, 0.25);
  color: var(--tk-primary);
}

.table-shell {
  background-color: var(--tk-surface-container-lowest);
  border-radius: 1rem;
  border: 1px solid var(--tk-outline-variant);
  box-shadow: 0 1px 3px 0 hsl(var(--tk-shadow-color) / 0.06);
  overflow: hidden;
}
.table-shell table thead tr {
  background-color: var(--tk-surface-container-low);
  border-bottom: 1px solid var(--tk-outline-variant);
}
.table-shell tbody tr {
  border-bottom: 1px solid var(--tk-outline-variant);
}
.table-shell tbody tr:last-child {
  border-bottom: none;
}
.table-shell tbody tr:hover {
  background-color: var(--tk-surface-container-low);
}

/* Listados que se transforman en tarjetas apiladas en mobile: cada <td>
   debe llevar `data-label="..."` con el nombre de su columna. Se activa
   agregando la clase `table-responsive-cards` al `.table-shell`. */
@media (max-width: 767px) {
  .table-responsive-cards table,
  .table-responsive-cards tbody,
  .table-responsive-cards tr,
  .table-responsive-cards td {
    display: block;
    width: 100%;
  }
  .table-responsive-cards thead {
    display: none;
  }
  .table-responsive-cards tbody tr {
    padding: 12px 14px;
    border-bottom: 1px solid var(--tk-outline-variant);
  }
  .table-responsive-cards td {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 0 !important;
    text-align: right;
  }
  .table-responsive-cards td[data-label]::before {
    content: attr(data-label);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--tk-on-surface-variant);
    text-align: left;
    margin-right: auto;
    flex-shrink: 0;
  }
  .table-responsive-cards td:empty {
    display: none;
  }
  .table-responsive-cards td[colspan] {
    display: block;
    text-align: left;
  }
  .table-responsive-cards td[colspan]::before {
    content: none;
  }
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 40px 16px;
  color: var(--tk-outline);
  text-align: center;
}
.empty-state .material-symbols-outlined {
  font-size: 32px;
  color: var(--tk-outline-variant);
}

input[type="checkbox"], input[type="radio"] {
  accent-color: var(--tk-primary);
}

/* Toggle de tema (sol/luna) */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  color: var(--tk-on-surface-variant);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.theme-toggle:hover {
  background-color: var(--tk-surface-container-low);
}
.theme-toggle .icon-dark { display: none; }
html.dark .theme-toggle .icon-light { display: none; }
html.dark .theme-toggle .icon-dark { display: inline; }

/* En el sidebar oscuro el toggle usa los tonos de texto claro del propio sidebar */
.theme-toggle-sidebar {
  color: inherit;
}
.theme-toggle-sidebar:hover {
  background-color: rgba(255,255,255,0.08);
}
