/* Optimized Background Animations with CSS Containment */
.page-header {
    position: relative;
    background: linear-gradient(135deg, var(--nav-bg), var(--card-bg));
    overflow: hidden;
    padding: 1rem 0;
    contain: layout style paint; /* CSS containment for better performance */
}

.fibonacci-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: center;
    contain: layout style paint; /* Isolate rendering */
    will-change: transform; /* Hint to browser for optimization */
}

/* Simplified fibonacci pattern with better performance */
.fibonacci-pattern {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(
            45deg,
            rgba(var(--primary-rgb), 0.03) 0px,
            rgba(var(--primary-rgb), 0.03) 1px,
            transparent 1px,
            transparent 8px
        );
    animation: fibonacci-rotate 30s ease-in-out infinite;
    contain: layout style paint;
}

.fibonacci-pattern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        repeating-linear-gradient(
            -45deg,
            rgba(var(--primary-rgb), 0.03) 0px,
            rgba(var(--primary-rgb), 0.03) 1px,
            transparent 1px,
            transparent 13px
        );
    animation: fibonacci-rotate-reverse 35s ease-in-out infinite;
}

/* Simplified pulse effect */
.fibonacci-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at center,
        rgba(var(--primary-rgb), 0.02) 0%,
        transparent 70%
    );
    transform: translate(-50%, -50%);
    animation: pulse 12s ease-in-out infinite;
}

/* Optimized keyframes with reduced complexity */
@keyframes fibonacci-rotate {
    0%, 100% {
        transform: rotate(0deg) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: rotate(180deg) scale(1.1);
        opacity: 0.3;
    }
}

@keyframes fibonacci-rotate-reverse {
    0%, 100% {
        transform: rotate(0deg) scale(1);
        opacity: 0.4;
    }
    50% {
        transform: rotate(-180deg) scale(0.9);
        opacity: 0.7;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.1;
    }
}

/* Reduce motion for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    .fibonacci-pattern,
    .fibonacci-pattern::before,
    .fibonacci-container::before {
        animation: none;
    }
    
    .fibonacci-pattern {
        opacity: 0.2;
    }
}

/* Performance optimization for mobile */
@media (max-width: 768px) {
    .fibonacci-pattern::before {
        display: none; /* Remove one layer on mobile */
    }
    
    .fibonacci-container::before {
        animation-duration: 20s; /* Slower animation on mobile */
    }
}

/* Force hardware acceleration but only where needed */
.fibonacci-pattern,
.fibonacci-container::before {
    transform: translateZ(0); /* Force GPU acceleration */
    backface-visibility: hidden; /* Prevent flickering */
}