/* --- ELITE STICKY HEADER (Glassmorphism & 8pt Grid) --- */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--grid-4) 0;
    transition: var(--transition-standard);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    padding: var(--grid-2) 0;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--grid-6);
}

/* Logo Styling */
.logo {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--black);
    text-decoration: none;
}

.logo-dot {
    color: var(--accent-blue);
    font-size: 1.5rem;
}

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

.nav-list {
    display: flex;
    gap: var(--grid-5);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-standard);
    position: relative;
    padding: var(--grid-1) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--black);
    transition: var(--transition-standard);
}

.nav-link.active::after {
    width: 100%;
}

/* Header CTA */
.btn-premium {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--matte-black);
    color: var(--white);
    padding: var(--grid-2) var(--grid-4);
    min-height: 44px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.8125rem;
    text-decoration: none;
    transition: var(--transition-standard);
    border: 1.5px solid var(--matte-black);
}

.btn-premium:hover {
    background: transparent;
    color: var(--black);
    transform: translateY(-1px);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--grid-1);
    z-index: 1001;
}

.hamburger .bar {
    display: block;
    width: 20px;
    height: 1.5px;
    margin: 4px 0;
    background-color: var(--black);
    transition: var(--transition-standard);
}

/* RESPONSIVE NAVIGATION */
@media (max-width: 1024px) {
    .nav-list {
        gap: var(--grid-3);
    }
}

@media (max-width: 768px) {
    .header {
        padding: var(--grid-3) 0;
    }
    
    .header-cta {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--white);
        padding: var(--grid-12) var(--grid-6) var(--grid-8);
        transition: cubic-bezier(0.77, 0, 0.175, 1) 0.5s;
        z-index: 1000;
        display: flex;
        flex-direction: column;
    }

    .nav-mobile-footer {
        display: flex;
        flex-direction: column;
        gap: var(--grid-6);
        margin-top: auto;
        padding-top: var(--grid-8);
        border-top: 1px solid var(--border-subtle);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--grid-4);
        margin-top: var(--grid-8);
    }

    .nav-link {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
        font-weight: 800;
        color: var(--black);
        letter-spacing: -0.02em;
        transition: var(--transition-standard);
        word-break: break-word;
        max-width: 100%;
    }

    .nav-link:hover {
        transform: translateX(10px);
        color: var(--accent-blue);
    }

    .nav-mobile-footer {
        display: flex;
        flex-direction: column;
        gap: var(--grid-6);
        margin-top: auto;
        padding-top: var(--grid-8);
        border-top: 1px solid var(--border-subtle);
    }

    .nav-mobile-details {
        display: flex;
        flex-direction: column;
        gap: var(--grid-1);
    }

    .nav-mobile-label {
        font-size: 0.75rem;
        font-weight: 700;
        text-transform: uppercase;
        color: var(--slate-400);
        letter-spacing: 0.1em;
    }

    .nav-mobile-link {
        font-size: 1.125rem;
        font-weight: 600;
        color: var(--black);
    }

    .nav-mobile-socials {
        display: flex;
        gap: var(--grid-4);
    }

    .nav-mobile-socials a {
        font-size: 1.25rem;
        color: var(--black);
        opacity: 0.6;
        transition: var(--transition-standard);
    }

    .nav-mobile-socials a:hover {
        opacity: 1;
        color: var(--accent-blue);
    }

    /* Hamburger Animation States */
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(5.5px) rotate(45deg);
    }
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-5.5px) rotate(-45deg);
    }
}