/* ============================================
   HEADER — Transparent to Frosted Glass
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    transition: background-color 0.4s ease, backdrop-filter 0.4s ease;
}

body.home .site-header {
    background-color: transparent;
}

body:not(.home) .site-header,
.site-header.is-scrolled {
    background-color: rgba(10,10,15,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.site-header__logo a {
    display: flex;
    align-items: center;
}

.site-header__logo img,
.site-header__logo-img {
    max-height: 44px;
    width: auto;
    display: block;
}

/* Navigation */
.site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

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

.nav-menu li {
    position: relative;
}

.nav-menu > li > a {
    color: rgba(255,255,255,0.85);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--space-sm) 0;
    transition: color var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a {
    color: var(--color-white);
}

/* Dropdown menus — dark, simple */
.nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: -16px;
    background: rgba(10,10,15,0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-sm) 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.3s ease;
}

.nav-menu li:hover > .sub-menu,
.nav-menu li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.nav-menu .sub-menu a {
    display: block;
    padding: var(--space-sm) var(--space-xl);
    text-transform: none;
    letter-spacing: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-menu .sub-menu a:hover {
    color: var(--color-white);
    background: rgba(255,255,255,0.04);
}

/* CTA Button in nav */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.btn--primary {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-white);
    transform: translateY(-1px);
}

.btn--outline {
    background: transparent;
    border: 1.5px solid rgba(255,255,255,0.3);
    color: var(--color-white);
}

.btn--outline:hover {
    border-color: var(--color-white);
    color: var(--color-white);
    transform: translateY(-1px);
}

.btn--lg {
    padding: 14px 32px;
    font-size: var(--font-size-base);
}

.btn--white {
    background: var(--color-white);
    color: var(--color-bg);
    font-weight: 600;
}

.btn--white:hover {
    background: rgba(255,255,255,0.9);
    color: var(--color-bg);
    transform: translateY(-1px);
}

/* Nav CTA — outlined style */
.nav-cta.btn--primary {
    background: transparent;
    border: 1.5px solid rgba(255,255,255,0.3);
    color: var(--color-white);
    font-weight: 500;
}

.nav-cta.btn--primary:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-white);
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-sm);
    z-index: 1001;
}

.menu-toggle__bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all 0.3s ease;
    border-radius: 1px;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) {
    opacity: 0;
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }

    .site-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 360px;
        height: 100vh;
        background: rgba(10,10,15,0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: calc(var(--header-height) + var(--space-2xl)) var(--space-xl) var(--space-xl);
        transition: right 0.4s ease;
        border-left: 1px solid var(--color-border);
    }

    .site-nav.is-open { right: 0; }

    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 0;
    }

    .nav-menu li { width: 100%; }

    .nav-menu a {
        display: block;
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--color-border);
        font-size: var(--font-size-base);
    }

    .nav-menu .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        backdrop-filter: none;
        border: none;
        padding: 0 0 0 var(--space-lg);
        min-width: 0;
    }

    .nav-cta {
        margin-top: var(--space-xl);
        width: 100%;
        text-align: center;
    }
}