/* ============================================================
   AI Search — modal + results UI
   Uses only CSS custom properties defined in theme.css.
   Dark mode works automatically via [data-theme="dark"] overrides.
   ============================================================ */

/* ----- Overlay ----- */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.search-overlay.is-open {
  opacity: 1;
  pointer-events: all;
}

/* ----- Modal box ----- */
.search-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 640px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(-12px) scale(0.98);
  transition: transform var(--transition-base);
}

.search-overlay.is-open .search-modal {
  transform: translateY(0) scale(1);
}

/* ----- Input row ----- */
.search-input-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-light);
}

.search-icon {
  flex-shrink: 0;
  color: var(--color-text-subtle);
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.5;
}

.search-input::placeholder {
  color: var(--color-text-subtle);
}

.search-kbd {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-subtle);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
}

/* ----- Body (results area) ----- */
.search-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ----- States ----- */
.search-hint {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-6) 0;
}

.search-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-6) 0;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.search-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: search-spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes search-spin {
  to { transform: rotate(360deg); }
}

/* ----- Answer card ----- */
.search-answer {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.search-answer-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.search-answer-text {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text);
  white-space: pre-wrap;
}

/* ----- Sources ----- */
.search-sources-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-subtle);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.search-sources-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.search-source-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-source-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.search-source-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
}

.search-source-excerpt {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ----- Error ----- */
.search-error {
  color: var(--color-error);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-4) 0;
}

/* ----- Mobile: bottom sheet ----- */
@media (max-width: 640px) {
  .search-overlay {
    align-items: flex-end;
    padding: 0;
  }

  .search-modal {
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    max-height: 90vh;
    transform: translateY(100%);
  }

  .search-overlay.is-open .search-modal {
    transform: translateY(0);
  }
}