/* nav.css — Hamburger nav drawer
 * Shared across all page types.
 * Drawer slides in from the right, overlays page content.
 */

/* ============================================================
   HAMBURGER BUTTON  (.nav-open-btn)
   Used in all page headers via [data-nav-open]
   ============================================================ */
.nav-open-btn {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.80);
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive);
}

.nav-open-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.nav-open-btn:active {
  background: rgba(255, 255, 255, 0.20);
}

[data-theme="dark"] .nav-open-btn {
  color: var(--color-text-muted);
}

[data-theme="dark"] .nav-open-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Legacy alias — kept for any existing references */
.nav-menu-btn { display: none; }

/* ============================================================
   DRAWER OVERLAY
   ============================================================ */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: oklch(0.1 0 0 / 0.45);
  z-index: calc(var(--z-modal, 400) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity 280ms cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================================
   DRAWER PANEL
   ============================================================ */
.nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(360px, 92vw);
  background: var(--color-surface);
  z-index: var(--z-modal, 400);
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 32px oklch(0 0 0 / 0.18);
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.nav-drawer.is-open {
  transform: translateX(0);
}

@media (prefers-reduced-motion: reduce) {
  .nav-drawer    { transition: none; }
  .nav-overlay   { transition: none; }
}

/* Drawer header */
.nav-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-divider);
  flex-shrink: 0;
}

.nav-drawer__title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.nav-drawer__close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive);
}

.nav-drawer__close:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Drawer scrollable body */
.nav-drawer__body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.nav-drawer__body::-webkit-scrollbar { width: 4px; }
.nav-drawer__body::-webkit-scrollbar-track { background: transparent; }
.nav-drawer__body::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }

/* Drawer footer */
.nav-drawer__footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-4) var(--space-5);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-drawer__footer-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================================
   DRAWER SEARCH
   ============================================================ */
.nav-search-form {
  position: relative;
}

.nav-search-input {
  width: 100%;
  height: 44px;
  /* left padding: search icon; right padding: submit button */
  padding: 0 var(--space-10) 0 var(--space-10);
  font-size: var(--text-sm);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  outline: none;
  transition:
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

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

.nav-search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15);
}

.nav-search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-faint);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.nav-search-submit {
  position: absolute;
  right: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  transition:
    background var(--transition-interactive),
    opacity var(--transition-interactive);
  flex-shrink: 0;
}

.nav-search-submit:hover {
  background: var(--color-primary-hover);
}

.nav-search-submit:active {
  background: var(--color-primary-active);
}

/* ============================================================
   DRAWER SECTION HEADINGS
   ============================================================ */
.nav-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.nav-section__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* ============================================================
   DRAWER COLLECTIONS LIST
   ============================================================ */
.nav-collections-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-collections-list a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: var(--text-sm);
  color: var(--color-text);
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive);
}

.nav-collections-list a:hover {
  background: var(--color-surface-offset);
  color: var(--color-primary);
}

.nav-collections-list a:active {
  background: var(--color-surface-dynamic);
}

.nav-coll-emoji {
  font-size: 1.15em;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

/* ============================================================
   DRAWER TAG CHIPS
   ============================================================ */
.nav-tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.nav-tag-chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  transition:
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    color var(--transition-interactive);
  min-height: 32px;
}

.nav-tag-chip:hover {
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================================
   THEME ROW
   ============================================================ */
.nav-theme-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
}

.nav-theme-row span {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.nav-theme-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive);
}

.nav-theme-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-dynamic);
  border-color: var(--color-primary);
}

/* ============================================================
   FOCUS TRAP GUARD
   ============================================================ */
.nav-focus-guard {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}