/* ============================================================
   ATC24 Español — Design System (Fase 4)
   Componentes reutilizables sobre los tokens de colors_and_type.css.
   Una sola fuente de verdad visual. Migración incremental: las vistas
   antiguas conviven hasta migrar a estas clases; ninguna vista nueva usa
   estilos inline. Todo accesible (focus-visible, roles, contraste).
   ============================================================ */

/* ---------- Accesibilidad: utilidades ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--accent); color: var(--accent-fg); padding: var(--s-3) var(--s-4);
  border-radius: 0 0 var(--r-md) 0;
}
.skip-link:focus { left: 0; }

/* Foco visible consistente en TODO elemento interactivo (WCAG 2.4.7). */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ============================================================
   BOTONES  —  .btn + variante + tamaño + estado
   ============================================================ */
.btn {
  --btn-bg: var(--accent); --btn-fg: var(--accent-fg); --btn-bd: transparent;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  font-family: var(--font-body); font-weight: var(--fw-semibold); font-size: var(--fs-small);
  line-height: 1; white-space: nowrap; cursor: pointer; user-select: none;
  padding: 10px 16px; border-radius: var(--r-md);
  border: 1px solid var(--btn-bd); background: var(--btn-bg); color: var(--btn-fg);
  transition: filter var(--dur-fast) var(--ease-standard), background var(--dur-fast), transform var(--dur-fast);
}
.btn:hover { filter: brightness(1.07); }
.btn:active { transform: translateY(1px); }
.btn[disabled], .btn.is-disabled { opacity: .5; cursor: not-allowed; pointer-events: none; }
.btn.is-loading { color: transparent; pointer-events: none; position: relative; }
.btn.is-loading::after {
  content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid currentColor; border-top-color: transparent; color: var(--btn-fg);
  animation: btn-spin .6s linear infinite;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

.btn--primary   { --btn-bg: var(--accent); --btn-fg: var(--accent-fg); }
.btn--secondary { --btn-bg: var(--bg-sunken); --btn-fg: var(--fg); --btn-bd: var(--border-strong); }
.btn--danger    { --btn-bg: var(--danger); --btn-fg: #fff; }
.btn--success   { --btn-bg: var(--success); --btn-fg: #02111F; }
.btn--ghost     { --btn-bg: transparent; --btn-fg: var(--fg-muted); }
.btn--ghost:hover { --btn-bg: var(--bg-sunken); filter: none; }
.btn--outline   { --btn-bg: transparent; --btn-fg: var(--fg); --btn-bd: var(--border-strong); }
.btn--outline:hover { --btn-bg: var(--bg-sunken); filter: none; }

.btn--sm { padding: 7px 12px; font-size: var(--fs-micro); }
.btn--lg { padding: 13px 22px; font-size: var(--fs-body); }
.btn--block { display: flex; width: 100%; }

.btn--icon { padding: 8px; width: 38px; height: 38px; border-radius: var(--r-md); }
.btn--icon.btn--pill { border-radius: var(--r-pill); }

/* ============================================================
   FORMULARIOS  —  .field envuelve label + control + error
   ============================================================ */
.field { display: flex; flex-direction: column; gap: var(--s-2); margin-bottom: var(--s-4); }
.field__label {
  font-family: var(--font-mono); font-size: var(--fs-micro); font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--fg-muted);
}
.field__hint { font-size: var(--fs-micro); color: var(--fg-subtle); }
.field__error { font-size: var(--fs-micro); color: var(--danger); }

.input, .select, .textarea {
  font-family: var(--font-body); font-size: var(--fs-small); color: var(--fg);
  background: var(--bg-sunken); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); padding: 10px 12px; width: 100%; outline: none;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.input:hover, .select:hover, .textarea:hover { border-color: var(--fg-subtle); }
.input:focus-visible, .select:focus-visible, .textarea:focus-visible { border-color: var(--accent); box-shadow: var(--focus-ring); }
.input[aria-invalid="true"], .select[aria-invalid="true"], .textarea[aria-invalid="true"] { border-color: var(--danger); }
.input[disabled], .select[disabled], .textarea[disabled] { opacity: .55; cursor: not-allowed; }
.textarea { resize: vertical; min-height: 88px; }

.checkbox, .radio { display: inline-flex; align-items: center; gap: var(--s-2); cursor: pointer; font-size: var(--fs-small); }
.searchbox { position: relative; }
.searchbox .input { padding-left: 36px; }
.searchbox__icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--fg-subtle); }

/* Toggle */
.toggle { position: relative; width: 44px; height: 24px; }
.toggle input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.toggle__track { position: absolute; inset: 0; background: var(--border-strong); border-radius: var(--r-pill); transition: background var(--dur-fast); }
.toggle__thumb { position: absolute; top: 2px; left: 2px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: left var(--dur-fast) var(--ease-flare); }
.toggle input:checked + .toggle__track { background: var(--accent); }
.toggle input:checked + .toggle__track + .toggle__thumb { left: 22px; }

/* ============================================================
   CARDS  —  .card base + composición
   ============================================================ */
.card {
  background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: var(--r-lg); box-shadow: var(--shadow-1);
  padding: var(--s-5); transition: box-shadow var(--dur-fast), border-color var(--dur-fast);
}
.card--interactive { cursor: pointer; }
.card--interactive:hover { box-shadow: var(--shadow-2); border-color: var(--border-strong); }
.card--selected { border-color: var(--accent); box-shadow: var(--shadow-glow); }
.card__header { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); margin-bottom: var(--s-3); }
.card__title { font-family: var(--font-display); font-size: var(--fs-h4); font-weight: var(--fw-bold); margin: 0; }
.card__body { color: var(--fg-muted); font-size: var(--fs-small); }
.card__footer { margin-top: var(--s-4); padding-top: var(--s-3); border-top: 1px solid var(--border-subtle); display: flex; gap: var(--s-2); }

/* Stat card */
.stat { display: flex; flex-direction: column; gap: var(--s-1); }
.stat__value { font-family: var(--font-display); font-size: var(--fs-h2); font-weight: var(--fw-heavy); color: var(--accent); line-height: 1; }
.stat__label { font-size: var(--fs-micro); color: var(--fg-muted); text-transform: uppercase; letter-spacing: var(--tracking-caps); }

/* ============================================================
   BADGES / CHIPS / AVATAR
   ============================================================ */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--font-mono); font-size: 10px; font-weight: var(--fw-bold);
  letter-spacing: .04em; padding: 3px 9px; border-radius: var(--r-pill);
  background: var(--bg-sunken); color: var(--fg-muted); border: 1px solid var(--border);
}
.badge--success { background: var(--success-bg); color: var(--success); border-color: transparent; }
.badge--warning { background: var(--warning-bg); color: var(--warning); border-color: transparent; }
.badge--danger  { background: var(--danger-bg); color: var(--danger); border-color: transparent; }

.avatar {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--r-pill);
  background: var(--accent); color: var(--accent-fg);
  font-family: var(--font-display); font-weight: var(--fw-bold); background-size: cover; background-position: center;
}
.avatar--lg { width: 56px; height: 56px; font-size: var(--fs-h4); }

/* ============================================================
   LAYOUT / GRID / TABLA / SKELETON / EMPTY STATE
   ============================================================ */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--s-5); }
.stack { display: flex; flex-direction: column; gap: var(--s-4); }
.row { display: flex; align-items: center; gap: var(--s-3); }

.table { width: 100%; border-collapse: collapse; font-size: var(--fs-small); }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table th { font-family: var(--font-mono); font-size: var(--fs-micro); text-transform: uppercase; color: var(--fg-muted); letter-spacing: var(--tracking-caps); }
.table tbody tr:hover { background: var(--bg-sunken); }

.skeleton {
  background: linear-gradient(90deg, var(--bg-sunken) 25%, var(--border) 37%, var(--bg-sunken) 63%);
  background-size: 400% 100%; border-radius: var(--r-sm); animation: skeleton 1.4s ease infinite;
}
@keyframes skeleton { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

.empty-state { text-align: center; padding: var(--s-12) var(--s-6); color: var(--fg-subtle); }
.empty-state__icon { font-size: 40px; opacity: .5; margin-bottom: var(--s-3); }

/* ============================================================
   GALERÍA — icono de binoculares para ampliar imagen (aparece al pasar el
   cursor o al enfocar por teclado, coherente con el resto del sistema).
   ============================================================ */
.gallery-zoom-icon {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: #fff; background: rgba(2, 17, 31, 0);
  opacity: 0; transition: opacity var(--dur-fast) var(--ease-standard), background var(--dur-fast);
  pointer-events: none;
}
.gallery-zoom-icon svg {
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, .5));
  transform: scale(.85);
  transition: transform var(--dur-fast) var(--ease-flare);
}
.gallery-zoom-btn:hover .gallery-zoom-icon,
.gallery-zoom-btn:focus-visible .gallery-zoom-icon {
  opacity: 1; background: rgba(2, 17, 31, .38);
}
.gallery-zoom-btn:hover .gallery-zoom-icon svg,
.gallery-zoom-btn:focus-visible .gallery-zoom-icon svg {
  transform: scale(1);
  color: var(--accent);
}

/* ============================================================
   RESPONSIVE — reorganizar, no sólo encoger
   ============================================================ */
@media (max-width: 640px) {
  .dash-grid { grid-template-columns: 1fr; }
  .btn { padding: 11px 16px; } /* objetivos táctiles ≥44px */
  .table thead { display: none; }
  .table td { display: flex; justify-content: space-between; border: none; }
}