header {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding-top: 10px;
    background: rgba(13, 13, 20, .9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
    min-height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.45rem;
    font-weight: 900;
    letter-spacing: .01em;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--grad-accent);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--shadow-accent);
}

.logo-word-1 { color: var(--text-primary); }
.logo-word-2 { color: var(--accent-light); text-shadow: 0 0 16px var(--accent-glow); }

.desktop-nav { display: flex; }

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: .95rem;
    color: var(--text-secondary);
    transition: all .2s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--accent-subtle);
}

.nav-link.active {
    color: var(--text-primary);
    background: var(--accent-subtle);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: var(--accent-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0;
}
.mobile-menu-btn span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--accent-light);
    border-radius: 2px;
    transition: all .25s ease;
}

.mobile-menu {
    position: fixed;
    top: calc(var(--header-h) + 10px);
    left: 16px;
    right: 16px;
    width: auto;
    max-height: calc(100vh - var(--header-h) - 26px);
    background: #16162a;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 18px 48px rgba(0, 0, 0, .45);
    overflow-y: auto;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
}
.mobile-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-menu-close {
    position: absolute;
    top: 14px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    line-height: 1;
}

.mobile-nav-list {
    padding: 56px 20px 28px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-nav-link {
    display: block;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, .02);
    border: 1px solid var(--border-subtle);
    transition: all .2s ease;
}
.mobile-nav-link:hover {
    color: var(--accent-light);
    background: var(--accent-subtle);
}

body.menu-open { overflow: hidden; }

@media (min-width: 769px) { .mobile-menu { display: none; } }
@media (max-width: 768px) {
    header {
        padding-top: 8px;
    }

    .header-inner {
        min-height: 56px;
        gap: 16px;
    }

    .logo {
        gap: 8px;
        font-size: 1.2rem;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
        border-radius: 9px;
    }

    .mobile-menu-btn { display: flex; }
    .desktop-nav     { display: none; }
}