/**
 * Command Palette — Cmd+K Speed Interface
 *
 * "Speed is the ultimate feature." — Linear
 *
 * Design Philosophy:
 * - Instant perceived response (<100ms)
 * - Keyboard-first, mouse-friendly
 * - Minimal visual chrome, maximum utility
 */

/* ========== Overlay ========== */

.command-palette-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}

.command-palette-overlay--open {
  display: flex;
}

/* ========== Palette Container ========== */

.command-palette {
  width: 100%;
  max-width: 560px;
  margin: 0 var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  opacity: 0;
  transform: scale(0.98) translateY(-10px);
  transition:
    opacity var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);

  /* Premium depth */
  box-shadow:
    0 0 0 1px var(--border-dim),
    0 4px 12px rgba(0, 0, 0, 0.15),
    0 12px 32px rgba(0, 0, 0, 0.2),
    0 24px 60px rgba(0, 0, 0, 0.25);
}

.command-palette--visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

/* Top edge light reflection */
.command-palette::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  right: var(--space-6);
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.08),
    transparent
  );
  pointer-events: none;
  z-index: 1;
}

/* ========== Search Input ========== */

.command-palette__input-wrapper {
  display: flex;
  align-items: center;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-dim);
  gap: var(--space-3);
}

.command-palette__search-icon {
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  opacity: 0.7;
}

.command-palette__input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: var(--text-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.command-palette__input::placeholder {
  color: var(--text-tertiary);
}

.command-palette__hint {
  padding: var(--space-1) var(--space-2);
  background: var(--bg-secondary);
  border-radius: var(--radius);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* ========== Command List ========== */

.command-palette__list {
  max-height: 400px;
  overflow-y: auto;
  padding: var(--space-2);
  overscroll-behavior: contain;
}

/* Custom scrollbar */
.command-palette__list::-webkit-scrollbar {
  width: 6px;
}

.command-palette__list::-webkit-scrollbar-track {
  background: transparent;
}

.command-palette__list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

.command-palette__list::-webkit-scrollbar-thumb:hover {
  background: var(--border-bright);
}

/* ========== Category Headers ========== */

.command-palette__category {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ========== Command Items ========== */

.command-palette__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}

.command-palette__item:hover {
  background: var(--bg-hover);
}

.command-palette__item--selected {
  background: var(--accent-dim);
}

.command-palette__item-title {
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.command-palette__item-shortcut {
  padding: var(--space-1) var(--space-2);
  background: var(--bg-secondary);
  border-radius: var(--radius);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* ========== Empty State ========== */

.command-palette__empty {
  padding: var(--space-6);
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.command-palette__empty-icon {
  font-size: var(--text-xl);
  opacity: 0.3;
  margin-bottom: var(--space-2);
}

/* ========== Footer ========== */

.command-palette__footer {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border-dim);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.command-palette__footer kbd {
  padding: 2px 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  margin-right: var(--space-1);
}

/* ========== Responsive ========== */

@media (max-width: 640px) {
  .command-palette-overlay {
    padding-top: 10vh;
  }

  .command-palette {
    max-width: none;
    margin: 0 var(--space-3);
    border-radius: var(--radius-lg);
  }

  .command-palette__list {
    max-height: 50vh;
  }

  .command-palette__footer {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
}

/* ========== Light Mode ========== */

[data-theme="light"] .command-palette-overlay {
  background: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .command-palette {
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.05),
    0 4px 12px rgba(0, 0, 0, 0.08),
    0 12px 32px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .command-palette::before {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 0, 0, 0.04),
    transparent
  );
}

/* ========== Reduced Motion ========== */

@media (prefers-reduced-motion: reduce) {
  .command-palette {
    transition: opacity var(--duration-fast);
    transform: none;
  }
}