/* ============================================
   Ace Flight Center - Header Styles
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-sticky);
    transition: all var(--transition-smooth);
    padding: 10px 0;
    background: linear-gradient(180deg, rgba(0, 18, 45, 0.8) 0%, rgba(0, 18, 45, 0.3) 60%, transparent 100%);
}

.site-header.scrolled {
    background: rgba(0, 24, 56, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

/* Logo */
.header-logo {
    flex-shrink: 0;
}

.header-logo img {
    height: 80px;
    width: auto;
    transition: height var(--transition-base);
}

.site-header.scrolled .header-logo img {
    height: 60px;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link {
    position: relative;
    display: block;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--color-red);
    transition: transform var(--transition-base);
    transform-origin: center;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-red);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* Book a Flight Button */
.header-cta .btn {
    padding: 10px 24px;
    font-size: 12px;
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
    padding: 0;
    z-index: var(--z-modal);
}

.mobile-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-base);
    border-radius: 2px;
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}