/* Top bar */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: rgba(5, 5, 5, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  z-index: 1100;
}

.menu-trigger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1110;
}
.menu-trigger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--white);
  border-radius: 1px;
  transition: transform 0.3s, opacity 0.3s;
}
.menu-trigger.is-open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-trigger.is-open span:nth-child(2) { opacity: 0; }
.menu-trigger.is-open span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

.site-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  text-decoration: none;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.site-logo em {
  font-style: normal;
  color: var(--red);
}

.header-cart {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--white);
}
.header-cart svg { width: 22px; height: 22px; }
.nav-cart-count {
  position: absolute;
  top: 4px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--red);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  border-radius: 100px;
  display: none;
  align-items: center;
  justify-content: center;
}

/* Side drawer */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-w);
  height: 100%;
  background: linear-gradient(180deg, #0a0a0a 0%, #111 100%);
  padding: calc(var(--nav-h) + 24px) 0 32px;
  transform: translateX(-100%);
  transition: transform 0.38s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1090;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  box-shadow: 8px 0 40px rgba(0, 0, 0, 0.5);
}
.side-nav.is-open { transform: translateX(0); }

.side-nav ul { list-style: none; }

.side-nav a,
.side-nav .nav-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 12px 20px;
  color: var(--gray);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  text-align: left;
  transition: color 0.2s, background 0.2s;
  position: relative;
}
.side-nav a:hover,
.side-nav .nav-toggle:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.04);
}

.side-nav .nav-home {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 8px;
}

.side-nav .nav-shop-link {
  color: var(--red);
  font-weight: 600;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.nav-toggle::after {
  content: '';
  width: 7px;
  height: 7px;
  border-right: 2px solid var(--gray-dim);
  border-bottom: 2px solid var(--gray-dim);
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-60%) rotate(45deg);
  transition: transform 0.25s;
}
.nav-toggle.is-expanded::after { transform: translateY(-40%) rotate(-135deg); }

.nav-submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: rgba(0, 0, 0, 0.35);
}
.nav-submenu.is-open { max-height: 600px; }

.nav-submenu a {
  padding: 10px 20px 10px 32px;
  font-size: 13px;
  color: var(--gray-dim);
}

.nav-submenu .nav-submenu a { padding-left: 44px; font-size: 12px; }

/* Flyout panel for 3rd level */
.nav-flyout {
  position: fixed;
  top: 0;
  left: var(--nav-w);
  width: 220px;
  height: 100%;
  background: #111;
  padding: calc(var(--nav-h) + 24px) 0 32px;
  transform: translateX(-20px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 1085;
  border-right: 1px solid var(--line);
  overflow-y: auto;
}
.nav-flyout.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}
.nav-flyout a {
  display: block;
  padding: 11px 20px;
  color: var(--gray-dim);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
}
.nav-flyout a:hover { color: var(--red); padding-left: 26px; }

body.nav-open::before {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
  z-index: 1080;
}

@media (max-width: 768px) {
  .side-nav { width: min(78vw, 300px); }
  .nav-flyout {
    left: min(78vw, 300px);
    width: min(72vw, 280px);
  }
}