/* ============================================================
   HEADER + SUPREME NAVIGATION
   ------------------------------------------------------------
   - Sticky header
   - Navigation links
   - Dropdown menus
   - Theme toggle
   - Scroll indicator
   - Mobile menu + hamburger
============================================================ */

header {
  position: sticky;
  top: 0;
  z-index: 120;
  margin: 0;
  border-radius: 0;
}

/* Supreme sheet */
header .sheet {
  position: relative;
  background: rgba(30, 30, 30, 0.45);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  box-shadow: 0 6px 18px rgba(0,0,0,.28);
}

/* Tape strip */
header .sheet::before {
  content: "";
  position: absolute;
  top: -10px; left: 120px;
  width: 78px; height: 22px;
  background: var(--tape);
  border-radius: 6px;
  opacity: .95;
  box-shadow: 0 2px 5px rgba(0,0,0,.25);
  transform: rotate(-4deg);
  z-index: 5;
}

/* Brand (floating sticky logo) */
.brand {
  position: fixed;
  top: -15px;
  left: 20px;
  z-index: 150;
}
.brand img {
  height: 80px;
  display: block;
  margin: 0;
}

/* Desktop Nav */
nav {
  flex: 1;
  display: none;
  align-items: center;
  justify-content: center;
  gap: 22px;
}
@media (min-width: 900px) {
  nav { display: flex; }
}
.nav-list {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-link {
  position: relative;
  padding: 0;
  font-family: "Fraunces", serif;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.nav-link:hover {
  transform: translateY(-2px);
  color: var(--rust);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg,var(--rust),var(--gold),var(--sage));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* Dropdown menus */
.menu { position: relative; }
.menu .caret { font-size: .9em; margin-left: .25em; opacity: .7; }
.menu-items {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 22px rgba(0,0,0,.35);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  z-index: 80;
}
.menu:hover .menu-items,
.menu-items:hover {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ✅ Theme-specific dropdown background */
html[data-theme="light"] .menu-items {
  background: rgba(255,255,255,0.95);
}
html[data-theme="dark"] .menu-items {
  background: rgba(24,27,25,0.95);
}

.menu-items a {
  display: block;
  padding: 10px 14px;
  font-weight: 700;
  border-bottom: 1px dashed var(--line);
  color: var(--ink);
  background: transparent;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.menu-items a:last-child { border-bottom: none; }
.menu-items a:hover {
  background: var(--bg-accent);
  color: var(--rust);
}

/* Theme toggle */
.toggle {
  position: fixed;
  top: 20px;
  right: 24px;
  z-index: 150;
  width: 64px;
  height: 32px;
  border-radius: 999px;
  background: var(--paper);
  border: 2px solid var(--line);
  cursor: pointer;
  overflow: hidden;
  flex-shrink: 0;
  transition: background .3s var(--ease), border .3s var(--ease);
}
.toggle .thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--sage);
  box-shadow: 0 2px 6px rgba(0,0,0,.3);
  transition: transform .3s var(--ease), background .3s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
}
.toggle::before,
.toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  opacity: .75;
}
.toggle::before {
  content: "🌿"; left: 10px;
}
.toggle::after {
  content: "🕯"; right: 10px;
}
.toggle[data-mode="light"] .thumb {
  transform: translateX(32px);
  background: var(--gold);
}

/* Rainbow scroll indicator */
#scrollIndicator {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(
    90deg,
    rgba(183,102,74,0.8),
    rgba(199,147,42,0.8),
    rgba(62,94,78,0.8),
    rgba(47,107,116,0.8),
    rgba(108,74,107,0.8)
  );
  z-index: 200;
  border-radius: 0 4px 4px 0;
  transition: width .2s ease-out;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: absolute;
  top:100%; left:0; right:0;
  background: var(--paper);
  border-bottom:1px solid var(--line);
  box-shadow:0 4px 12px rgba(0,0,0,.2);
  z-index: 50;
  padding: 12px 20px;
  flex-direction: column;
  gap: 10px;
}
.mobile-menu.open { display: flex; }

/* Hamburger */
.hamburger {
  display: none;
  position: relative;
  width: 28px; height: 20px;
  border: none; background: transparent;
  cursor: pointer; z-index: 65;
}
.hamburger span,
.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 3px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.hamburger span { top: 50%; transform: translateY(-50%); }
.hamburger::before { top: 0; }
.hamburger::after { bottom: 0; }
@media (max-width: 899px) {
  .hamburger { display: block; }
  nav { display: none !important; }
}