/* ============================================================
   search.css — Cmd/Ctrl+K search modal
   How Physics Works — v2.0
   ============================================================ */

/* ── Overlay ─────────────────────────────────────────────── */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 900;
  background: oklch(0 0 0 / 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}

#search-modal[open] + .search-overlay,
.search-overlay.is-open {
  display: flex;
}

/* ── Modal panel ─────────────────────────────────────────── */
.search-modal {
  display: none;
  position: fixed;
  top: 15vh;
  left: 50%;
  transform: translateX(-50%);
  z-index: 901;
  width: min(600px, calc(100vw - 2rem));
  max-height: 60vh;
  background: var(--color-deep);
  border: 1px solid oklch(1 0 0 / 0.12);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  flex-direction: column;
  animation: search-in 0.15s ease;
}

#search-modal[open] {
  display: flex;
}

@keyframes search-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-8px) scale(0.98); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0)    scale(1); }
}

/* ── Search input row ─────────────────────────────────────── */
.search-modal__input-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid oklch(1 0 0 / 0.08);
  flex-shrink: 0;
}

.search-modal__icon {
  color: var(--color-text-muted);
  flex-shrink: 0;
  font-size: 1rem;
}

.search-modal__input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.search-modal__input::placeholder {
  color: var(--color-text-muted);
}

.search-modal__close {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  background: var(--color-surface);
  border: 1px solid oklch(1 0 0 / 0.1);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Results list ─────────────────────────────────────────── */
.search-modal__results {
  overflow-y: auto;
  flex: 1;
  padding: var(--space-2) 0;
}

.search-modal__empty {
  padding: var(--space-8) var(--space-5);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.search-result {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  border-left: 2px solid transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.search-result:hover,
.search-result.is-focused {
  background: var(--era-result-bg, oklch(1 0 0 / 0.04));
  border-left-color: var(--era-result-color, var(--color-gold));
}

.search-result[data-era="ancient"]        {
  --era-result-color: var(--era-ancient-color);
  --era-result-bg: var(--era-ancient-bg);
}
.search-result[data-era="revolution"]     {
  --era-result-color: var(--era-revolution-color);
  --era-result-bg: var(--era-revolution-bg);
}
.search-result[data-era="classical"]      {
  --era-result-color: var(--era-classical-color);
  --era-result-bg: var(--era-classical-bg);
}
.search-result[data-era="modern"]         {
  --era-result-color: var(--era-modern-color);
  --era-result-bg: var(--era-modern-bg);
}
.search-result[data-era="contemporary"]   {
  --era-result-color: var(--era-contemporary-color);
  --era-result-bg: var(--era-contemporary-bg);
}

.search-result__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--era-result-color, var(--color-gold));
  flex-shrink: 0;
  width: 2.5ch;
}

.search-result__body {
  flex: 1;
  min-width: 0;
}

.search-result__title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.search-result__era-badge {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--era-result-color, var(--color-gold));
  flex-shrink: 0;
}

/* ── Footer hint ─────────────────────────────────────────── */
.search-modal__footer {
  padding: var(--space-2) var(--space-5);
  border-top: 1px solid oklch(1 0 0 / 0.06);
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.search-modal__hint kbd {
  background: var(--color-surface);
  border: 1px solid oklch(1 0 0 / 0.12);
  border-radius: 3px;
  padding: 1px 4px;
  font-family: inherit;
}

/* ── Reduced motion ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .search-modal { animation: none; }
}

/* ── Search trigger button (header) ─────────────────────── */
.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: oklch(1 0 0 / 0.06);
  border: 1px solid oklch(1 0 0 / 0.12);
  border-radius: var(--radius-md, 6px);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.search-trigger:hover {
  background: oklch(1 0 0 / 0.10);
  color: var(--color-text-secondary);
  border-color: oklch(1 0 0 / 0.20);
}

.search-trigger__icon {
  font-size: 0.9rem;
  opacity: 0.7;
}

.search-trigger__kbd {
  opacity: 0.55;
  font-size: 0.65rem;
}

@media (max-width: 480px) {
  .search-trigger__kbd { display: none; }
}