.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;

    background: rgba(17, 24, 39, 0.96);
    color: #ffffff;
    padding: 24px 40px;

    transition: padding 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
    padding: 14px 40px;
    background: rgba(17, 24, 39, 0.88);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.4px;
    color: #ffffff;
    text-decoration: none;
}

nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

nav a {
    position: relative;
    color: #ffffff;
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    padding-bottom: 6px;
}

nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;

    width: 0;
    height: 2px;
    background: #facc15;

    transition: width 0.3s ease;
}

nav a:hover {
    color: #facc15;
}

nav a:hover::after {
    width: 100%;
}

@media (min-width: 1024px) {
    .site-header {
        max-width: 1200px;
        margin: 0 auto;
        border-radius: 10px;
    }
}