/* Variabel warna untuk efek Aurora & Kaca (RAM & GPU Optimized) */
:root {
    --aurora-color-1: rgba(26, 115, 232, 0.25);
    --aurora-color-2: rgba(37, 211, 102, 0.15);
    --glass-bg-light: rgba(255, 255, 255, 0.7);
    --glass-border-light: rgba(255, 255, 255, 0.3);
}

html.dark {
    --aurora-color-1: rgba(138, 180, 248, 0.12);
    --aurora-color-2: rgba(37, 211, 102, 0.08);
    --glass-bg-dark: rgba(40, 42, 45, 0.7);
    --glass-border-dark: rgba(255, 255, 255, 0.1);
}

/* --- Efek Background Aurora (Ringan Memori) --- */
.aurora-background {
    background-color: var(--background-color);
    transition: background-color var(--transition-speed);
    overflow: hidden;
    position: relative;
}

/* Elemen pseudo untuk bola-bola cahaya */
.aurora-background::before,
.aurora-background::after {
    content: '';
    position: absolute;
    z-index: 0;
    width: 45vmax;
    height: 45vmax;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.65;
    pointer-events: none;
    transform: translate3d(0, 0, 0);
}

/* Bola cahaya pertama */
.aurora-background::before {
    background-image: radial-gradient(circle, var(--aurora-color-1), transparent 70%);
    top: -15vh;
    left: -15vw;
    animation: move-aurora 30s ease-in-out infinite alternate;
}

/* Bola cahaya kedua */
.aurora-background::after {
    background-image: radial-gradient(circle, var(--aurora-color-2), transparent 70%);
    bottom: -15vh;
    right: -15vw;
    animation: move-aurora 40s ease-in-out infinite alternate-reverse;
}

@keyframes move-aurora {
    0% { transform: translate3d(0, 0, 0); }
    100% { transform: translate3d(12vw, 10vh, 0); }
}

@media (prefers-reduced-motion: reduce) {
    .aurora-background::before,
    .aurora-background::after {
        animation: none !important;
    }
}

/* --- Efek Kartu Kaca (Glassmorphism Ringan) --- */
.glass-card-content {
    background: var(--glass-bg-light);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border-light);
    box-shadow: 0 4px 20px 0 rgba(31, 38, 135, 0.08);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
    position: relative;
    z-index: 1;
    border-radius: var(--border-radius);
}

html.dark .glass-card-content {
    background: var(--glass-bg-dark);
    border: 1px solid var(--glass-border-dark);
}