/* Header Styles - Zamzoola Brand - Black Theme */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(15px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(255, 68, 68, 0.3);
}

.header.scrolled {
    background: rgba(0, 0, 0, 0.98) !important;
    box-shadow: 0 2px 20px rgba(255, 68, 68, 0.3) !important;
    padding: 0.8rem 0;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-red), var(--accent-cyan), var(--primary-blue), var(--accent-yellow));
    background-size: 300% 100%;
    animation: gradient-flow 3s ease infinite;
}

@keyframes gradient-flow {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}