/* header.css — Sticky transparent header, nav, hamburger, mobile menu */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 20px;
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

/* Offset for 18+ banner height */
.has-banner .site-header {
  top: 36px;
}

.site-header.scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--c-border), 0 4px 24px rgba(91, 63, 255, 0.06);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.site-logo {
  font-family: var(--f-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-logo:hover {
  color: var(--c-accent);
}

/* Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-family: var(--f-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
  padding: 8px 0;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--c-text);
}

.main-nav .btn {
  padding: 10px 28px;
  font-size: 0.9rem;
  color: #fff;
}

.main-nav .btn:hover,
.main-nav .btn.active {
  color: #fff;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--c-text);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(250, 247, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  z-index: 999;
}

.has-banner .mobile-menu {
  top: 108px;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  font-family: var(--f-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--c-text);
  text-decoration: none;
  transition: color 0.2s ease;
}

.mobile-menu a:hover {
  color: var(--c-accent);
}