/* ============================================
   UI Components V1.0 — Base component classes
   Usable anywhere via clases (no sobreescribe
   estilos existentes a menos que se apliquen).
   ============================================ */

/* ---------- Accessibility primitives ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 8px;
  z-index: var(--z-toast, 800);
  padding: 10px 16px;
  background: var(--color-text, #0f172a);
  color: #fff;
  border-radius: var(--radius-md, 8px);
  font-size: var(--text-sm, 14px);
  font-weight: var(--font-semibold, 600);
  text-decoration: none;
  transition: top 150ms ease;
}
.skip-link:focus {
  top: 8px;
  outline: none;
  box-shadow: var(--shadow-focus, 0 0 0 3px rgba(91,92,255,0.45));
}

/* Visually hidden helper (for screen reader only labels) */
.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;
}

/* Consistent focus ring for any interactive element that opts in */
.tab-button:focus-visible,
.sidebar button:focus-visible,
[role="tab"]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus, 0 0 0 3px rgba(91,92,255,0.45));
  border-radius: var(--radius-sm, 4px);
}

/* ---------- Tab zones (V3 question-based navigation) ---------- */
.tabs-header {
  align-items: stretch;
  flex-wrap: wrap;
  gap: var(--space-3, 12px);
}
.tab-zone {
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: relative;
  padding: 0 6px 0 0;
}
.tab-zone + .tab-zone {
  padding-left: var(--space-3, 12px);
}
.tab-zone + .tab-zone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22%;
  bottom: 22%;
  width: 1px;
  background: var(--color-border, rgba(15,23,42,0.10));
}
.tab-zone__label {
  font-size: var(--text-2xs, 10px);
  letter-spacing: var(--tracking-wider, 0.05em);
  text-transform: uppercase;
  color: var(--color-text-subtle, rgba(15,23,42,0.44));
  font-weight: var(--font-semibold, 600);
  padding: 0 4px;
  line-height: 1;
  margin-bottom: 2px;
  user-select: none;
}
.tab-zone__label::before {
  content: "";
  display: inline-block;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.4;
  margin-right: 6px;
  vertical-align: middle;
}
.tab-zone--resumen     .tab-zone__label { color: var(--color-accent-500, #5b5cff); }
.tab-zone--diagnostico .tab-zone__label { color: var(--color-positive-600, #059669); }
.tab-zone--profundidad .tab-zone__label { color: var(--color-mixed-600, #d97706); }
.tab-zone--accion      .tab-zone__label { color: var(--color-primary-600, #9333ea); }
.tab-zone .tab-group { display: flex; align-items: center; gap: 0; }

/* ---------- Utility classes ---------- */
.u-muted { color: var(--ui-muted); }
.u-muted-2 { color: var(--ui-muted-2); }
.u-max { max-width: var(--ui-content-max); margin: 0 auto; }
.u-row { display: flex; align-items: center; gap: var(--ui-s-3); }
.u-col { display: flex; flex-direction: column; gap: var(--ui-s-3); }
.u-gap-1 { gap: var(--ui-s-1); }
.u-gap-2 { gap: var(--ui-s-2); }
.u-gap-4 { gap: var(--ui-s-4); }
.u-gap-5 { gap: var(--ui-s-5); }
.u-text-sm { font-size: var(--ui-text-sm); }
.u-text-lg { font-size: var(--ui-text-lg); }
.u-text-xl { font-size: var(--ui-text-xl); }
.u-text-2xl { font-size: var(--ui-text-2xl); }
.u-fw-600 { font-weight: 600; }
.u-fw-700 { font-weight: 700; }

.divider {
  height: 1px;
  background: var(--ui-border);
  width: 100%;
  border: none;
}

/* ---------- Card ---------- */
.ui-card {
  background: var(--ui-surface);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-r-lg);
  box-shadow: var(--ui-sh-sm);
}

.ui-card--soft {
  background: var(--ui-surface-2);
}

.ui-card__header {
  padding: var(--ui-s-5);
  border-bottom: 1px solid var(--ui-border);
}

.ui-card__body {
  padding: var(--ui-s-5);
}

.ui-card__title {
  font-size: var(--ui-text-xl);
  line-height: var(--ui-lh-tight);
  font-weight: 700;
  margin: 0;
  color: var(--ui-text);
}

.ui-card__subtitle {
  margin: var(--ui-s-2) 0 0 0;
  color: var(--ui-muted);
  font-size: var(--ui-text-md);
  line-height: var(--ui-lh-normal);
}

/* ---------- Buttons ---------- */
.ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ui-s-2);
  padding: 10px 14px;
  border-radius: var(--ui-r-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--ui-text-md);
  font-family: var(--ui-font-sans);
  cursor: pointer;
  user-select: none;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease, border-color 120ms ease, opacity 120ms ease;
}

.ui-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--ui-focus);
}

.ui-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.ui-btn--primary {
  background: var(--ui-accent);
  color: #fff;
  box-shadow: 0 10px 26px rgba(91, 92, 255, 0.22);
}
.ui-btn--primary:hover:not(:disabled) { transform: translateY(-1px); }

.ui-btn--secondary {
  background: rgba(15, 23, 42, 0.04);
  border-color: var(--ui-border);
  color: var(--ui-text);
}
.ui-btn--secondary:hover:not(:disabled) { background: rgba(15, 23, 42, 0.06); }

.ui-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ui-text);
}
.ui-btn--ghost:hover:not(:disabled) { background: rgba(15, 23, 42, 0.04); }

.ui-btn--danger {
  background: var(--ui-danger);
  color: #fff;
}

.ui-btn--sm {
  padding: 6px 10px;
  font-size: var(--ui-text-sm);
  border-radius: var(--ui-r-sm);
}

.ui-btn--lg {
  padding: 14px 20px;
  font-size: var(--ui-text-lg);
  border-radius: var(--ui-r-md);
}

/* ---------- Inputs ---------- */
.ui-input, .ui-select {
  width: 100%;
  height: 40px;
  border-radius: var(--ui-r-sm);
  border: 1px solid var(--ui-border);
  background: var(--ui-surface);
  padding: 0 12px;
  font-size: var(--ui-text-md);
  font-family: var(--ui-font-sans);
  color: var(--ui-text);
  transition: box-shadow 120ms ease, border-color 120ms ease;
}

.ui-input::placeholder { color: var(--ui-muted-2); }

.ui-input:focus, .ui-select:focus {
  outline: none;
  border-color: var(--ui-accent);
  box-shadow: 0 0 0 4px var(--ui-focus);
}

.ui-textarea {
  width: 100%;
  border-radius: var(--ui-r-sm);
  border: 1px solid var(--ui-border);
  background: var(--ui-surface);
  padding: 10px 12px;
  font-size: var(--ui-text-md);
  font-family: var(--ui-font-sans);
  color: var(--ui-text);
  resize: vertical;
  min-height: 80px;
  transition: box-shadow 120ms ease, border-color 120ms ease;
}

.ui-textarea:focus {
  outline: none;
  border-color: rgba(91, 92, 255, 0.55);
  box-shadow: 0 0 0 4px var(--ui-focus);
}

/* ---------- Badges / Chips ---------- */
.ui-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: var(--ui-text-sm);
  font-weight: 600;
  border: 1px solid var(--ui-border);
  background: rgba(15, 23, 42, 0.03);
}

.ui-badge--ok { background: rgba(34, 197, 94, 0.10); border-color: rgba(34, 197, 94, 0.25); color: #0f5132; }
.ui-badge--warn { background: rgba(245, 158, 11, 0.12); border-color: rgba(245, 158, 11, 0.30); color: #7a4b00; }
.ui-badge--danger { background: rgba(239, 68, 68, 0.10); border-color: rgba(239, 68, 68, 0.25); color: #7f1d1d; }
.ui-badge--accent { background: rgba(91, 92, 255, 0.10); border-color: rgba(91, 92, 255, 0.25); color: #3b3cc0; }

/* ---------- Empty state ---------- */
.ui-empty {
  display: grid;
  place-items: center;
  text-align: center;
  padding: var(--ui-s-8) var(--ui-s-6);
  color: var(--ui-muted);
}
.ui-empty__icon {
  font-size: 48px;
  margin-bottom: var(--ui-s-3);
  opacity: 0.5;
}
.ui-empty__title { font-weight: 700; color: var(--ui-text); font-size: var(--ui-text-lg); margin-bottom: var(--ui-s-2); }
.ui-empty__desc { font-size: var(--ui-text-md); max-width: 560px; line-height: var(--ui-lh-relaxed); }

/* ---------- Skeleton loader ---------- */
.ui-skeleton {
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.06) 0%, rgba(15, 23, 42, 0.10) 50%, rgba(15, 23, 42, 0.06) 100%);
  background-size: 200% 100%;
  animation: ui-skeleton-shimmer 1.5s ease infinite;
  border-radius: var(--ui-r-sm);
}

@keyframes ui-skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.ui-skeleton--text { height: 14px; width: 80%; margin-bottom: 8px; }
.ui-skeleton--title { height: 22px; width: 50%; margin-bottom: 12px; }
.ui-skeleton--card { height: 120px; width: 100%; border-radius: var(--ui-r-lg); }

/* ---------- Toast ---------- */
.ui-toast {
  position: fixed;
  bottom: var(--ui-s-5);
  right: var(--ui-s-5);
  background: var(--ui-text);
  color: #fff;
  padding: var(--ui-s-3) var(--ui-s-5);
  border-radius: var(--ui-r-md);
  font-size: var(--ui-text-md);
  font-weight: 500;
  box-shadow: var(--ui-sh-lg);
  z-index: 900;
  animation: ui-toast-in 200ms ease-out;
}

.ui-toast--success { background: #0f5132; }
.ui-toast--warn { background: #7a4b00; }
.ui-toast--danger { background: #7f1d1d; }

@keyframes ui-toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Dropzone ---------- */
.ui-dropzone {
  border: 1px dashed rgba(15, 23, 42, 0.25);
  border-radius: var(--ui-r-lg);
  background: rgba(255, 255, 255, 0.70);
  padding: var(--ui-s-7);
  display: grid;
  place-items: center;
  gap: var(--ui-s-2);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.ui-dropzone--active {
  border-color: rgba(91, 92, 255, 0.65);
  box-shadow: 0 0 0 6px rgba(91, 92, 255, 0.12);
}

/* ---------- Kbd ---------- */
.ui-kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--ui-border);
  background: rgba(15, 23, 42, 0.03);
  color: var(--ui-text);
}

/* ---------- Stepper (wizard) ---------- */
.ui-step {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid var(--ui-border);
  background: var(--ui-surface);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: var(--ui-text-sm);
  color: var(--ui-muted);
  flex-shrink: 0;
  transition: all 150ms ease;
}

.ui-step--done {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.28);
  color: #0f5132;
}

.ui-step--current {
  background: rgba(91, 92, 255, 0.12);
  border-color: rgba(91, 92, 255, 0.30);
  color: var(--ui-accent);
}

.ui-step-connector {
  width: 24px;
  height: 2px;
  background: var(--ui-border);
  flex-shrink: 0;
}

.ui-step-connector--done {
  background: rgba(34, 197, 94, 0.40);
}

/* ---------- Toggle ---------- */
.ui-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.15);
  border: none;
  cursor: pointer;
  transition: background 150ms ease;
  padding: 0;
}

.ui-toggle::after {
  content: '';
  position: absolute;
  left: 3px;
  top: 3px;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  transition: transform 150ms ease;
}

.ui-toggle[aria-checked="true"],
.ui-toggle.is-active {
  background: var(--ui-accent);
}

.ui-toggle[aria-checked="true"]::after,
.ui-toggle.is-active::after {
  transform: translateX(20px);
}