/* ========================================
   SITE HEADER
======================================== */

.site-header {
    position: relative;
    width: 100%;
    z-index: 1000;
}

/* ========================================
   TOP BAR
======================================== */

.topbar {
    background: var(--color-black);
    color: var(--color-white);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar-inner {
    min-height: 46px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.topbar-left,
.topbar-right {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.topbar-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-sm);
    color: var(--color-white);
    transition: color var(--transition-fast);
}

.topbar-link:hover {
    color: var(--color-primary-light);
    text-decoration: none;
}

.topbar-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-light);
    font-size: 0.95rem;
}

.topbar-text {
    line-height: 1.3;
}

.social-link {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.08);
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    transform: translateY(-1px);
}

/* ========================================
   MAIN HEADER
======================================== */

.main-header {
    position: relative;
    width: 100%;
    z-index: 1000;
    background: rgba(17, 17, 17, 0.96);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.main-header.is-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
}

.main-header-spacer {
    height: 0;
}

.main-header-inner {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    max-width: 180px;
}

.site-logo img {
    display: block;
    max-height: 56px;
    width: auto;
    height: auto;
}

/* ========================================
   NAVIGATION
======================================== */

.site-nav {
    display: flex;
    align-items: center;
    gap: 22px;
    margin-left: auto;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 20px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-item {
    margin: 0;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    font-size: var(--font-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-white);
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary-light);
    text-decoration: none;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-fast);
}

.nav-link:hover::after,
.nav-link:focus::after {
    transform: scaleX(1);
}

.nav-link.active {
    color: var(--color-primary-light);
    font-weight: var(--font-weight-semibold);
}

.nav-link.active::after {
    transform: scaleX(1);
    background: var(--color-primary-light);
}

.nav-cta {
    display: flex;
    align-items: center;
}

.nav-cta .btn {
    font-size: var(--font-sm);
}

/* ========================================
   MOBILE TOGGLE
======================================== */


.nav-toggle {
    display: none;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle-line {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 999px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header.nav-open .nav-toggle-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .nav-toggle-line:nth-child(2) {
    opacity: 0;
}

.site-header.nav-open .nav-toggle-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   TABLET / MOBILE
======================================== */

@media (max-width: 991px) {
    .topbar {
        display: none;
    }

    .main-header-inner {
        min-height: 76px;
    }

    .site-logo {
        max-width: 180px;
    }

    .site-logo img {
        max-height: 56px;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--color-black);
        box-shadow: var(--shadow-md);
        padding: 18px 20px 24px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-header.nav-open .site-nav {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .nav-link {
        width: 100%;
        padding: 14px 0;
        justify-content: space-between;
    }

    .nav-link::after {
        display: none;
    }

    .nav-cta {
        margin-top: 18px;
    }

    .nav-cta .btn {
        width: 100%;
    }
}

@media (max-width: 575px) {
    .main-header-inner {
        min-height: 72px;
    }

    .site-logo {
        max-width: 150px;
    }

    .site-logo img {
        max-height: 50px;
    }

    .site-nav {
        padding: 16px 16px 20px;
    }
}