.aurora-background {
    position: absolute; /* Fixes the background to the viewport */
    top: 0;
    left: 0;
    min-height: 100vh;
    width: 100%;
    /* Gradient for the starry night effect */
    background: radial-gradient(circle at 50% 10%, var(--dark-blue-bg) 0%, var(--darker-blue-bg) 100%);
    z-index: -1; /* Ensures content sits on top */
    overflow: hidden;
    /* Add a subtle star effect using a pseudo-element if desired */
    /* &::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml;base64,...') repeat; Make tiny star pattern SVG
        opacity: 0.3;
    } */
}

.aurora-layer {
    position: absolute;
    bottom: -50px; /* Start below the viewport */
    width: 150%; /* Wider than screen to allow movement */
    height: 300px; /* Height of aurora band */
    filter: blur(80px); /* Soft blur to create the wispy effect */
    opacity: 0.4; /* Overall transparency */
    border-radius: 50%; /* Helps create organic shapes with blur */
    transform-origin: center bottom; /* Anchor movement from bottom */
    will-change: transform, opacity; /* Optimize for animation */
}

/* Individual aurora layer styling and animation */
.aurora-layer-1 {
    left: -20%;
    background: radial-gradient(circle at 50% 100%, var(--aurora-green) 0%, transparent 70%);
    animation: aurora-drift-1 40s linear infinite alternate,
               aurora-fade 20s ease-in-out infinite alternate;
    transform: rotate(5deg) scale(0.9);
}

.aurora-layer-2 {
    left: 0%;
    background: radial-gradient(circle at 50% 100%, var(--aurora-purple) 0%, transparent 70%);
    animation: aurora-drift-2 50s linear infinite alternate,
               aurora-fade 25s ease-in-out infinite alternate;
    transform: rotate(-10deg) scale(0.8);
    opacity: 0.35;
    height: 350px;
}

.aurora-layer-3 {
    left: 30%;
    background: radial-gradient(circle at 50% 100%, var(--aurora-teal) 0%, transparent 70%);
    animation: aurora-drift-3 45s linear infinite alternate,
               aurora-fade 22s ease-in-out infinite alternate;
    transform: rotate(15deg) scale(1.1);
    opacity: 0.5;
    height: 280px;
}

.aurora-layer-4 {
    left: -5%;
    background: radial-gradient(circle at 50% 100%, var(--aurora-light-blue) 0%, transparent 70%);
    animation: aurora-drift-4 60s linear infinite alternate,
               aurora-fade 18s ease-in-out infinite alternate;
    transform: rotate(0deg) scale(0.7);
    opacity: 0.25;
    height: 400px;
}

.aurora-layer-5 {
    left: 60%;
    background: radial-gradient(circle at 50% 100%, var(--aurora-green) 0%, transparent 70%);
    animation: aurora-drift-5 38s linear infinite alternate,
               aurora-fade 28s ease-in-out infinite alternate;
    transform: rotate(-5deg) scale(1.05);
    opacity: 0.45;
    height: 320px;
}

/* Keyframe animations for drifting and fading */
@keyframes aurora-drift-1 {
    0% { transform: translate(-10%, 0) rotate(5deg) scale(0.9); }
    100% { transform: translate(10%, -100px) rotate(8deg) scale(1.0); }
}

@keyframes aurora-drift-2 {
    0% { transform: translate(0, 0) rotate(-10deg) scale(0.8); }
    100% { transform: translate(-15%, -120px) rotate(-7deg) scale(0.9); }
}

@keyframes aurora-drift-3 {
    0% { transform: translate(0, 0) rotate(15deg) scale(1.1); }
    100% { transform: translate(-5%, -80px) rotate(12deg) scale(1.05); }
}

@keyframes aurora-drift-4 {
    0% { transform: translate(5%, 0) rotate(0deg) scale(0.7); }
    100% { transform: translate(-10%, -150px) rotate(3deg) scale(0.8); }
}

@keyframes aurora-drift-5 {
    0% { transform: translate(-5%, 0) rotate(-5deg) scale(1.05); }
    100% { transform: translate(5%, -90px) rotate(-2deg) scale(0.95); }
}

@keyframes aurora-fade {
    0% { opacity: 0.4; }
    50% { opacity: 0.6; }
    100% { opacity: 0.4; }
}


/* Content styling */
.content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 50px 20px;
    max-width: 90%;
    margin: 0 auto;
    background: rgba(250, 249, 249, 0.15); /* More transparent for glass effect */
    border-radius: 18px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.18);

    /* Vertically center using flexbox on body */
    margin-top: 0;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.content h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: #ffffff;
}

.content p {
    font-size: 1.2em;
    line-height: 1.6;
    margin-bottom: 30px;
    color: #e0e0e0;
}

.content button {
    background-color: var(--aurora-green);
    color: var(--darker-blue-bg);
    border: none;
    padding: 15px 30px;
    font-size: 1.1em;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.content button:hover {
    background-color: #27a892; /* Slightly darker green on hover */
}