.site-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    width: 100%;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--page-border);
}

.header-container {
    width: min(var(--container), calc(100% - var(--container-padding)));
    height: 78px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 28px;
}

/* Brand */
.header-logo {
    display: flex;
    align-items: center;
    gap: 0;
    min-width: 248px;
    text-decoration: none;
}

.logo-lockup-wrap {
    display: flex;
    align-items: center;
}

.header-logo-img {
    width: 218px;
    height: auto;
    max-height: 58px;
    object-fit: contain;
}

.logo-light {
    display: none;
}

/* Nav */
.header-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.nav-dropdown {
    position: relative;
    padding-bottom: 12px;
    margin-bottom: -12px;
}

.nav-link {
    min-height: 40px;
    padding: 0 14px;
    border-radius: 999px;
    color: var(--page-text-soft);
    font-size: 13px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    transition: all 0.2s ease;
}

button.nav-link {
    border: 0;
    background: transparent;
    cursor: pointer;
}

.nav-drop-btn {
    gap: 7px;
}

.nav-drop-btn i {
    font-size: 10px;
    opacity: 0.72;
    transition: transform 0.2s ease;
}

.nav-direct {
    gap: 0 !important;
}

.nav-link:hover,
.nav-dropdown:hover .nav-link,
.nav-dropdown:focus-within .nav-link {
    background: rgba(31, 111, 235, 0.08);
    color: var(--primary);
}

/* Dropdown */
.dropdown-menu {
    position: absolute;
    top: 52px;
    left: 0;
    min-width: 210px;
    padding: 8px;
    border-radius: 16px;
    border: 1px solid var(--page-border);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 44px rgba(15, 23, 42, 0.12);
    display: flex;
    flex-direction: column;
    gap: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    pointer-events: none;
    transition: all 0.2s ease;
}

.dropdown-menu-right {
    left: auto;
    right: 0;
}

.dropdown-menu a {
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--page-text-soft);
    font-size: 13px;
    font-weight: 750;
    transition: all 0.18s ease;
}

.dropdown-menu a:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu,
.dropdown-menu:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.nav-dropdown:hover .nav-drop-btn i,
.nav-dropdown:focus-within .nav-drop-btn i {
    transform: rotate(180deg);
}

/* Actions */
.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 12px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    border: 1px solid var(--page-border);
    background: rgba(255, 255, 255, 0.7);
    display: grid;
    place-items: center;
    cursor: pointer;
    font-size: 14px;
    color: var(--page-text-soft);
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

.header-login {
    min-height: 40px;
    padding: 0 15px;
    border-radius: 999px;
    color: var(--page-text-soft);
    font-size: 13px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    transition: all 0.2s ease;
}

.header-login:hover {
    color: var(--primary);
    background: var(--primary-soft);
}

.header-cta {
    min-height: 42px;
    padding: 0 20px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--gradient-cta);
    box-shadow: var(--shadow-accent);
    font-size: 13px;
    font-weight: 900;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.header-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 36px rgba(242, 122, 33, 0.28);
}

/* Mobile menu */
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 14px;
    border: 1px solid var(--page-border);
    background: rgba(255, 255, 255, 0.7);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.menu-toggle span {
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: var(--page-text-soft);
}

/* Dark mode */
:root[data-theme="dark"] .site-header {
    background: rgba(15, 23, 42, 0.9);
    border-bottom-color: var(--page-border);
}

:root[data-theme="dark"] .logo-dark {
    display: none;
}

:root[data-theme="dark"] .logo-light {
    display: block;
}

:root[data-theme="dark"] .logo-name {
    color: #FFFFFF;
}

:root[data-theme="dark"] .logo-tagline {
    color: #CBD5E1;
}

:root[data-theme="dark"] .nav-link,
:root[data-theme="dark"] .header-login,
:root[data-theme="dark"] .theme-toggle {
    color: #cbd5e1;
}

:root[data-theme="dark"] .theme-toggle,
:root[data-theme="dark"] .menu-toggle {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--page-border);
}

:root[data-theme="dark"] .menu-toggle span {
    background: #cbd5e1;
}

:root[data-theme="dark"] .nav-link:hover,
:root[data-theme="dark"] .nav-dropdown:hover .nav-link,
:root[data-theme="dark"] .nav-dropdown:focus-within .nav-link,
:root[data-theme="dark"] .header-login:hover,
:root[data-theme="dark"] .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
}

:root[data-theme="dark"] .dropdown-menu,
:root[data-theme="dark"] .header-nav {
    background: rgba(17, 24, 39, 0.98);
    border-color: var(--page-border);
}

:root[data-theme="dark"] .dropdown-menu a {
    color: #cbd5e1;
}

:root[data-theme="dark"] .dropdown-menu a:hover {
    background: rgba(242, 122, 33, 0.12);
    color: var(--accent);
}

/* Responsive */
@media (max-width: 1100px) {
    .header-container {
        gap: 16px;
    }

    .nav-link {
        padding: 0 10px;
    }

    .header-logo {
        min-width: 190px;
    }

    .header-logo-img {
        width: 74px;
    }

    .logo-name {
        font-size: 20px;
    }
}

@media (max-width: 940px) {
    .header-container {
        grid-template-columns: auto 1fr auto;
    }

    .menu-toggle {
        display: inline-flex;
        justify-self: center;
    }

    .header-nav {
        position: absolute;
        top: 78px;
        left: 12px;
        right: 12px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 16px;
        border-radius: 22px;
        background: rgba(255, 255, 255, 0.98);
        border: 1px solid var(--page-border);
        box-shadow: var(--shadow-lg);
    }

    .header-nav.active {
        display: flex;
    }

    .nav-dropdown {
        padding-bottom: 0;
        margin-bottom: 0;
    }

    .nav-link {
        width: 100%;
        justify-content: space-between;
    }

    .dropdown-menu {
        position: static;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
        box-shadow: none;
        margin-top: 6px;
        min-width: 100%;
    }

    .nav-dropdown:hover .dropdown-menu,
    .nav-dropdown:focus-within .dropdown-menu {
        display: flex;
    }
}

@media (max-width: 560px) {
    .header-container {
        height: 70px;
        gap: 10px;
        width: min(100%, calc(100% - 16px));
    }

    .header-logo {
        min-width: auto;
        gap: 4px;
    }

    .header-logo-img {
        width: 62px;
        max-height: 36px;
    }

    .logo-text {
        margin-left: -5px;
    }

    .logo-name {
        font-size: 17px;
        letter-spacing: 0.6px;
    }

    .logo-tagline {
        font-size: 9px;
    }

    .header-login {
        display: none;
    }

    .header-actions {
        gap: 8px;
    }

    .header-cta {
        min-height: 38px;
        padding: 0 12px;
        font-size: 12px;
    }

    .theme-toggle {
        width: 38px;
        height: 38px;
    }
}