.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(8, 11, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.header-logo {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.25rem;
}

.nav-links li a {
    font-family: var(--font-nav);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--muted);
    letter-spacing: 0.2px;
    transition: var(--transition);
}

.nav-links li a:hover {
    color: var(--text);
}

.nav-links .btn-resume {
    padding: 0.45rem 1.25rem;
    background: var(--gradient);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 6px;
}

.nav-links .btn-resume:hover {
    opacity: 0.85;
    color: #fff;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 6px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

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

    .nav-links {
        position: fixed;
        top: 72px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background: var(--bg);
        flex-direction: column;
        justify-content: center;
        gap: 2.5rem;
        border-top: 1px solid var(--border);
        transition: right 0.35s ease;
    }

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

    .nav-links li a { font-size: 1.25rem; font-family: var(--font-nav); }
}