.header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.logo {
    flex: 0 0 auto;
}

.nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

.nav ul li a:hover {
    color: #00f2fe;
}

.nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #00f2fe, #4facfe);
    transition: width 0.3s ease;
}

.nav ul li a:hover::after {
    width: 100%;
}

.auth-buttons {
    display: flex;
    gap: 15px;
    flex: 0 0 auto;
}