/* ============================================================
   Hamburger drawer + admin-aware nav sections.
   Slide-from-left drawer triggered by the burger button in the
   site header. Pairs with /js/nav.js (drawer toggle + admin probe)
   and /js/admin.js (login/logout). Uses Phosphor icons (loaded via
   CDN in shell.html). Variables come from base.css.
   ============================================================ */

.site-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.nav-spacer { flex: 1; }

/* ---- Hamburger button — two lines (=) that morph to an X.
   No box, no border. ---- */
.nav-burger {
  background: transparent;
  border: 0;
  padding: var(--sp-2) var(--sp-4) var(--sp-2) 0;
  cursor: pointer;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 6px;
  color: var(--c-fg);
  transition: color 160ms;
}
.nav-burger:hover { color: var(--c-accent); }
.burger-bar {
  display: block;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 240ms cubic-bezier(0.2, 0.6, 0.2, 1);
  transform-origin: center;
}
.nav-burger[aria-expanded="true"] .burger-bar:nth-child(1) {
  transform: translateY(3.75px) rotate(45deg);
}
.nav-burger[aria-expanded="true"] .burger-bar:nth-child(2) {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* ---- Drawer ---- */
.nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  height: 100dvh;
  width: 320px;
  max-width: 86vw;
  background: var(--c-bg);
  border-right: 1px solid var(--c-border);
  z-index: 100;
  transform: translateX(-100%);
  transition: transform 280ms cubic-bezier(0.2, 0.6, 0.2, 1);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-bottom: var(--sp-5);
}
.nav-drawer:not([hidden]) { transform: translateX(0); }
.nav-drawer[hidden] {
  display: flex !important;
  visibility: hidden;
  pointer-events: none;
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 90;
  opacity: 0;
  transition: opacity 220ms;
  backdrop-filter: blur(2px);
}
.nav-backdrop:not([hidden]) { opacity: 1; }
.nav-backdrop[hidden] { display: block !important; pointer-events: none; visibility: hidden; opacity: 0; }

.nav-drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-4) var(--sp-4) var(--sp-2);
  border-bottom: 1px solid var(--c-border);
}
.nav-drawer-brand {
  font-weight: 700;
  color: var(--c-accent);
}
.nav-drawer-close {
  background: transparent;
  border: 0;
  padding: var(--sp-2);
  font-size: 22px;
  color: var(--c-muted);
  cursor: pointer;
  line-height: 1;
}
.nav-drawer-close:hover { color: var(--c-fg); }

.nav-drawer-section {
  display: flex;
  flex-direction: column;
  padding: var(--sp-3) 6px;
  border-bottom: 1px solid var(--c-border);
}
.nav-drawer-section:last-of-type { border-bottom: 0; }
.nav-drawer-section h3 {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  margin: 6px var(--sp-3) 2px;
}
.nav-drawer-section a,
.nav-drawer-section button {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font: inherit;
  color: var(--c-fg);
  text-decoration: none;
  padding: 9px var(--sp-3);
  border: 0;
  background: transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background 120ms, color 120ms;
}
.nav-drawer-section a:hover,
.nav-drawer-section button:hover {
  background: var(--c-surface);
  color: var(--c-fg);
  text-decoration: none;
}
.nav-drawer-section a > i,
.nav-drawer-section button > i {
  font-size: 18px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  color: var(--c-muted);
}
.nav-drawer-section a:hover > i,
.nav-drawer-section button:hover > i {
  color: var(--c-accent);
}
.nav-drawer-section .nav-logout {
  margin-top: var(--sp-2);
}
.nav-login { color: var(--c-accent); }

/* Don't render the drawer at all on the login page (keeps the screen clean) */
body.is-admin-login .site-header,
body.is-admin-login .nav-drawer,
body.is-admin-login .nav-backdrop { display: none !important; }

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

/* On admin pages, widen the main content so dashboards breathe. */
body.is-admin-page .site-header,
body.is-admin-page .site-main,
body.is-admin-page .site-footer {
  max-width: 1080px;
}