body {
    margin: 0;
    background: linear-gradient(180deg, #0b1220 0%, #111827 45%, #f8fafc 45%, #f8fafc 100%);
    font-family: Arial, Helvetica, sans-serif;
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 20px;
    background: rgba(17, 24, 39, 0.96);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.25);
    border-bottom: 1px solid rgba(148, 163, 184, 0.15);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand,
.nav-links a,
.cta-btn {
    text-decoration: none;
    font-family: Arial, Helvetica, sans-serif;
}

.brand {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links a {
    color: #e5eefb;
    padding: 10px 12px;
    border-radius: 4px;
    font-size: 0.98rem;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.nav-links a:hover,
.cta-btn:hover {
    background: rgba(241, 54, 37, 0.12);
    color: #fff;
}

.cta-btn {
    padding: 10px 14px;
    border-radius: 4px;
    background: linear-gradient(135deg, #f13625, #ff7a59);
    color: #fff;
    font-weight: 700;
}

@media (max-width: 820px) {
    .header {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
}