/* ==========================================================================
   Header Styles
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-normal);
    background-color: transparent;
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    padding: calc(var(--spacing-sm) * 0.5) 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Brand / Logo */
.brand .logo {
    display: flex;
    align-items: center;
}

.site-logo {
    width: 104px;
    height: 120px;
    object-fit: contain;
    transition: var(--transition-normal);
    filter: brightness(0) invert(1); /* Ensure it's white if the logo is black initially, or adjust if needed */
}

.site-header.scrolled .site-logo {
    width: 80px;
    height: 92px;
    filter: none; /* Return to original color when scrolled */
}

/* Navigation */
.main-nav ul {
    display: flex;
    gap: 2.5rem;
}

.main-nav a {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-white);
    text-transform: uppercase;
    transition: var(--transition-fast);
    position: relative;
}

.site-header.scrolled .main-nav a {
    color: var(--color-black);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: var(--transition-normal);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    position: relative;
    transition: var(--transition-normal);
}

.site-header.scrolled .hamburger {
    background-color: var(--color-black);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: inherit;
    left: 0;
    transition: var(--transition-normal);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* Responsive */
@media (max-width: 991px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-black);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition-normal);
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }
    
    .main-nav a {
        font-size: 1.2rem;
        color: var(--color-white);
    }
    
    .site-header.scrolled .main-nav a {
        color: var(--color-white); /* Keep white on mobile menu overlay */
    }
    
    /* Menu Open State Styling */
    .menu-open .hamburger {
        background-color: transparent !important;
    }
    .menu-open .hamburger::before {
        top: 0;
        transform: rotate(45deg);
        background-color: var(--color-white);
    }
    .menu-open .hamburger::after {
        bottom: 0;
        transform: rotate(-45deg);
        background-color: var(--color-white);
    }
}