/* nav-drawer.css — Issue #1064 / PR companion to nav-drawer.js
 *
 * Left-edge slide-over drawer. Enabled at viewports > 768px only
 * (Option A per nav-drawer.js header — at ≤768px the bottom-nav More
 * tab covers the same routes).
 *
 * Tokens: --nav-bg, --nav-bg2, --nav-text, --nav-text-muted,
 *         --nav-active-bg, --accent, --border (all defined in style.css).
 */

/* ── Backdrop ──────────────────────────────────────────────────────────── */
.nav-drawer-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1290; /* below drawer (1300), above page content */
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  transition: opacity 250ms ease;
}

.nav-drawer-backdrop.is-open {
  display: block;
  opacity: 1;
}

/* ── Drawer panel ──────────────────────────────────────────────────────── */
.nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: min(320px, 85vw);
  z-index: 1300;
  background: var(--nav-bg);
  border-right: 1px solid var(--border);
  box-shadow: 4px 0 32px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 250ms ease;
  overflow: hidden;
  /* Prevent the off-screen drawer from creating a scrollable region */
  overscroll-behavior: contain;
}

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

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

/* Hide entirely at ≤768px — bottom-nav More tab handles those routes */
@media (max-width: 768px) {
  .nav-drawer,
  .nav-drawer-backdrop {
    display: none !important;
  }
}

/* ── Header ────────────────────────────────────────────────────────────── */
.nav-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.nav-drawer-title {
  color: var(--nav-text);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--nav-text-muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: color 120ms ease, background-color 120ms ease;
}

.nav-drawer-close:hover,
.nav-drawer-close:focus-visible {
  color: var(--nav-text);
  background: var(--nav-active-bg, rgba(255, 255, 255, 0.08));
  outline: none;
}

.nav-drawer-close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

/* ── Nav list ──────────────────────────────────────────────────────────── */
.nav-drawer-list {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 8px;
}

.nav-drawer-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--nav-text-muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: color 120ms ease, background-color 120ms ease;
}

.nav-drawer-item:hover,
.nav-drawer-item:focus-visible {
  color: var(--nav-text);
  background: var(--nav-active-bg, rgba(255, 255, 255, 0.08));
  outline: none;
}

.nav-drawer-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.nav-drawer-item.active {
  color: var(--nav-text);
  background: var(--nav-active-bg, rgba(255, 255, 255, 0.08));
  border-left: 3px solid var(--accent);
  padding-left: 9px; /* compensate for the 3px border */
}

.nav-drawer-icon {
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
}

.nav-drawer-label {
  white-space: nowrap;
}

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