/* Aurora Background */
.aurora-container {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: linear-gradient(to bottom, #02100a 0%, #052415 50%, #09321f 100%);
    overflow: hidden;
}

.aurora {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 50% 50%, rgba(52, 211, 153, 0.15), transparent 50%),
        radial-gradient(circle at 20% 30%, rgba(16, 185, 129, 0.15), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(6, 95, 70, 0.15), transparent 50%);
    filter: blur(60px);
    animation: aurora-flow 20s ease-in-out infinite alternate;
    z-index: 1;
}

@keyframes aurora-flow {
    0% { transform: rotate(0deg) scale(1); }
    100% { transform: rotate(5deg) scale(1.1); }
}

/* Stars */
.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    opacity: 0.8;
    animation: twinkle var(--duration) ease-in-out infinite;
    z-index: 2;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 0.3; transform: scale(0.8); }
}

/* Shooting Stars */
.shooting-star {
    position: absolute;
    width: 150px;
    height: 2px;
    background: linear-gradient(90deg, rgba(255,255,255,1), transparent);
    transform: rotate(-45deg);
    opacity: 0;
    animation: shoot 6s linear infinite;
    animation-delay: var(--delay);
    z-index: 3;
    pointer-events: none;
}

.shooting-star::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    width: 4px;
    height: 4px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 10px 2px rgba(255, 255, 255, 0.8);
}

@keyframes shoot {
    0% {
        left: var(--start-x);
        top: var(--start-y);
        opacity: 1;
        width: 0;
    }
    10% {
        width: 150px;
    }
    20% {
        left: calc(var(--start-x) - 300px);
        top: calc(var(--start-y) + 300px);
        opacity: 0;
        width: 150px;
    }
    100% {
        left: calc(var(--start-x) - 300px);
        top: calc(var(--start-y) + 300px);
        opacity: 0;
    }
}