/* ============================================================
   CarBrandish — header.css
   ============================================================ */

/* ── Site Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: 1.1vw var(--container-padding);
  transition: padding var(--duration-fast) var(--ease-out);
}

.site-header.scrolled {
  padding-top: 0.7vw;
  padding-bottom: 0.7vw;
}

.header-container {
  max-width: 73.6vw;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 6.25vw;
  padding: 0 2.8vw;
  background: var(--color-surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: background var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.header-logo img {
  height: 1.8vw;
  width: auto;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 2.5vw;
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: var(--weight-regular);
  color: #fff;
  letter-spacing: var(--tracking-wide);
  transition: color var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.nav-link:hover {
  color: var(--color-primary);
}

/* ── Hamburger ── */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.35vw;
  width: 2.8vw;
  height: 2.8vw;
  padding: 0.7vw;
  background: none;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  z-index: calc(var(--z-header) + 2);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

body.menu-open {
  overflow: hidden;
}

body.menu-open .site-header {
  z-index: calc(var(--z-header) + 3);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Mobile Menu ── */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: var(--color-bg);
  z-index: calc(var(--z-header) + 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 0 6vw 8vw;
  pointer-events: none;
  visibility: hidden;
  clip-path: inset(0 0 0 100%);
}

.mobile-menu.open {
  pointer-events: all;
  visibility: visible;
}

.mobile-menu-header {
  width: 100%;
  display: flex;
  align-items: center;
  height: 17vw;
  flex-shrink: 0;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5vw;
  flex: 1;
  justify-content: center;
}

.mobile-menu .mobile-nav-link {
  display: block;
  font-family: var(--font-heading);
  font-size: 6vw;
  font-weight: var(--weight-bold);
  color: #fff;
  padding: 1vw 0;
  text-align: center;
  letter-spacing: -0.02em;
  transition: color var(--duration-normal) var(--ease-out);
}

.mobile-menu .mobile-nav-link:hover {
  color: var(--color-primary);
}

.mobile-menu-social {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-shrink: 0;
}

.mobile-menu-social a {
  width: 12vw;
  height: 12vw;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: all var(--duration-normal) var(--ease-out);
}

.mobile-menu-social a:hover {
  background: var(--color-primary);
  color: #fff;
}

.mobile-menu-social svg {
  width: 4.3vw;
  height: 4.3vw;
}

/* ── Header Responsive ── */
@media (min-width: 768px) {
  .hamburger {
    display: none;
  }
}

@media (max-width: 767px) {
  .header-nav {
    display: none;
  }

  .hamburger {
    display: flex;
    width: 11.7vw;
    height: 11.7vw;
    padding: 2.9vw;
    gap: 1.3vw;
  }

  .site-header {
    padding: 0;
  }

  .site-header.scrolled {
    padding-top: 0;
    padding-bottom: 0;
  }

  .header-container {
    padding: 0 5.3vw;
    height: 20vw;
    border-radius: 0;
    max-width: 100%;
  }

  .header-logo img {
    height: 5vw;
  }
}

@media (min-width: 1440px) {
  .header-container {
    max-width: 79.2vw;
  }
}