:root {
    --bg-dark: #121212;
    --section-bg: #1a1a1a;
    --accent-cyan: #00d4ff;
}

body {
    background-color: var(--bg-dark);
    color: #ffffff;
    font-family: 'Montserrat', 'Noto Sans TC', sans-serif;
    margin: 0;
    overflow-x: hidden;
}

/* navbar */
.site-navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    background: rgba(18, 18, 18, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.site-navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 80rem;
    margin: 0 auto;
    padding: 1.5rem 2.5rem;
}

.site-brand {
    font-size: 1.25rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

.site-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--accent-cyan);
}

/* footer */
.site-footer {
    padding: 5rem 1rem;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.site-footer-social {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    font-size: 1.5rem;
}

.site-footer-social a {
    color: #9ca3af;
    transition: color 0.3s ease;
    text-decoration: none;
}

.site-footer-social a:hover {
    color: var(--accent-cyan);
}

.site-footer-copy {
    color: #4b5563;
    font-size: 10px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

/* fixed navbar offset */
.has-fixed-navbar {
    padding-top: 96px;
}

/* mobile */
@media (max-width: 768px) {
    .site-navbar-inner {
        padding: 1rem 1.25rem;
    }

    .site-menu {
        display: none;
    }
}