/* glowing animation */
header {
    position: relative;
    overflow: hidden;
}

header h1, 
header h2, 
.scroll-indicator {
    z-index: 2; 
}

header::before,
header::after {
    content: "";
    position: absolute;
    width: max(25vw, 280px); 
    height: max(25vw, 280px);
    border-radius: 50%;
    filter: blur(200px);
    z-index: 1;
    animation: breathingEffect 5s infinite alternate ease-in-out;
}

header::before {
    background-color: rgba(255, 60, 219, 0.4);
    top: -15%;
    left: -15%;
}

header::after {
    background-color: rgba(87, 230, 255, 0.2);
    bottom: -15%;
    right: -15%;
    animation-delay: 3s; 
}

@keyframes breathingEffect {
    0% { transform: scale(1); }
    100% { transform: scale(1.3); }
}

/* arrow animation */
.scroll-indicator {
    position: absolute;
    bottom: 4rem;
    opacity: 0.5;
}

.arrow {
    width: 50px;
    height: auto;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.6)) invert(1); 
    animation: bounce 3.5s infinite;
}