/* =============================================================
 * pandOS Component Tokens
 *
 * Exactly 5 reusable components that together carry the Stitch
 * dashboard aesthetic (see docs/DESIGN_SYSTEM.md §5):
 *   .pa-panel        — tonal surface, no border, ambient shadow
 *   .pa-h1 / .pa-h2  — editorial headings (Inter tight-tracked)
 *   .pa-btn--cta     — gradient primary CTA with elevated glow
 *   .pa-nav-item     — sidebar nav with Logic-Blade on active
 *   .pa-skeleton     — shimmer for turbo_frame lazy state
 *
 * YAGNI: other components (buttons, pills, tables, menus, inputs)
 * stay as Tailwind utility chains. When a chain duplicates ≥ 2
 * times we extract it here. See DESIGN_SYSTEM.md §5 for the full
 * catalogue already spec'd.
 * =============================================================
 */

/* ---------- .pa-panel -------------------------------------------- */
.pa-panel {
  background-color: var(--surface-container-lowest);
  color: var(--on-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-ambient);
  /* No 1px border — the no-line rule (docs/DESIGN_SYSTEM.md §1) */
}
.pa-panel--flat {
  background-color: var(--surface-container-low);
  box-shadow: none;
}
.pa-panel--elevated {
  box-shadow: var(--shadow-elevated);
}
.pa-panel--glass {
  background-color: color-mix(in oklab, var(--surface) 72%, transparent);
  -webkit-backdrop-filter: blur(20px);
          backdrop-filter: blur(20px);
  box-shadow: var(--shadow-ambient);
}

/* ---------- .pa-h1 / .pa-h2 -------------------------------------- *
 * Inter tight-tracked; clamp() for fluid sizing so no separate
 * mobile breakpoint needed.
 */
.pa-h1 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}
.pa-h2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.25rem, 2vw, 1.625rem);
  line-height: 1.2;
  letter-spacing: -0.018em;
  color: var(--on-surface);
}

/* Eyebrow / label-sm — paired with headings for the editorial feel. */
.pa-eyebrow {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.6875rem;
  line-height: 1.3;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* Mono-numerics via Inter's tabular figures — no second font needed. */
.pa-num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum", "lnum";
}

/* ---------- .pa-btn--cta ----------------------------------------- */
.pa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.125rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1;
  cursor: pointer;
  transition: transform var(--motion-fast) var(--easing-standard),
              filter    var(--motion-fast) var(--easing-standard),
              box-shadow var(--motion-fast) var(--easing-standard);
}
.pa-btn--cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: var(--on-primary);
  box-shadow: var(--shadow-elevated);
  border: none;
}
.pa-btn--cta:hover,
.pa-btn--cta:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.05);
  outline: none;
  box-shadow: var(--shadow-elevated), var(--focus-ring);
}
.pa-btn--cta:active {
  transform: translateY(0);
  filter: brightness(0.98);
}

/* ---------- .pa-nav-item ----------------------------------------- *
 * Sidebar nav row. `.is-active` paints a 2px Logic Blade on the
 * left via ::before, consistent with docs/DESIGN_SYSTEM.md §4.3.
 */
.pa-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: color var(--motion-fast) var(--easing-standard),
              background-color var(--motion-fast) var(--easing-standard);
}
.pa-nav-item:hover {
  color: var(--on-surface);
  background-color: var(--surface-container);
}
.pa-nav-item.is-active {
  color: var(--primary);
  background-color: color-mix(in oklab, var(--primary) 10%, transparent);
}
.pa-nav-item.is-active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.375rem;
  bottom: 0.375rem;
  width: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.pa-nav-item svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

/* ---------- .pa-skeleton ----------------------------------------- *
 * Shimmer placeholder for turbo_frame loading states. Lighter than
 * .animate-pulse and theme-aware.
 */
@keyframes pa-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}
.pa-skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-container-low)  0%,
    var(--surface-container-high) 50%,
    var(--surface-container-low) 100%
  );
  background-size: 200% 100%;
  animation: pa-shimmer 1.5s var(--easing-standard) infinite;
  border-radius: var(--radius-sm);
}
.pa-skeleton--line {
  height: 0.75rem;
  margin: 0.375rem 0;
}
.pa-skeleton--block {
  height: 4rem;
}
.pa-skeleton--card {
  height: 6rem;
  border-radius: var(--radius-lg);
}

/* Respect users who disable motion (WCAG 2.3.3 / prefers-reduced-motion). */
@media (prefers-reduced-motion: reduce) {
  .pa-skeleton { animation: none; background: var(--surface-container-low); }
  .pa-btn,
  .pa-nav-item { transition: none; }
}