header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    height: 50px;
}

.logo img {
    max-height: 40px;
    width: auto;
}

.nav ul {
    display: flex;
    list-style: none;
}

.nav ul li {
    margin-left: 30px;
}

.nav a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 400;
    font-size: 14px;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: var(--accent-color);
}