.center-flex > div {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}
.planet-img-wrapper {
    position: relative;
    display: inline-block;
}
body {
    background: radial-gradient(ellipse at 60% 40%, #070c18 60%, #010212 100%);
    color: #e0e0f0;
    font-family: 'Orbitron', 'Roboto Mono', 'Segoe UI', Arial, sans-serif;
    margin: 0;
    min-height: 100vh;
    overflow: hidden;
}

.star-bg, #star-canvas {
    background: transparent !important;
}
.center-flex h1 {
    margin-bottom: 32px;
    color: #fff0f0;
    font-family: 'Orbitron', 'Roboto Mono', monospace;
    font-size: 2.2rem;
    letter-spacing: 5px;
    text-shadow: 0 4px 0 #000, 0 0 12px #ffe066cc;
    font-weight: 900;
    text-transform: uppercase;
}
.center-flex img, #planet-img {
    display: block;
    margin: 0 auto;
    border-radius: 50%;
    background: #23243a;
    box-shadow: 0 0 16px 8px #fff0f0, 0 0 0 8px #0a0a18cc;
    border: 4px solid #fff0f0;
    transition: opacity 0.5s cubic-bezier(0.4,0,0.2,1), transform 0.5s cubic-bezier(0.4,0,0.2,1);
    opacity: 1;
    transform: scale(1);
    animation: planet-spin 20s linear infinite;
}

#planet-img.planet-zoom-in {
    animation: planet-zoom-in 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0s 1;
}

@keyframes planet-zoom-in {
    0% {
        transform: scale(0.2) rotate(0deg);
        opacity: 0;
    }
    60% {
        opacity: 1;
    }
    100% {
        transform: scale(1) rotate(360deg);
        opacity: 1;
    }
}

.planet-img-fade {
    opacity: 0;
    transform: scale(0.7);
    transition: opacity 0.4s cubic-bezier(0.4,0,0.2,1), transform 0.4s cubic-bezier(0.4,0,0.2,1);
}

button#generate-btn {
    position: fixed;
    right: 40px;
    bottom: 40px;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle at 60% 40%, #ffe066 70%, #ffb300 100%);
    color: #23243a;
    border: 4px solid #fffbe6;
    border-radius: 50%;
    padding: 0;
    font-size: 1.3rem;
    font-family: 'Orbitron', 'Roboto Mono', monospace;
    font-weight: 900;
    cursor: pointer;
    z-index: 2;
    box-shadow: 0 0 32px 8px #ffe06699, 0 0 0 8px #0a0a18cc, 0 2px 16px #ffe06655;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s, transform 0.2s;
    text-shadow: 0   2px 8px #fffbe6, 0 1px 0 #fffbe6;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px) brightness(1.1);
    outline: none;
    border-style: double;
    box-sizing: border-box;
    text-transform: uppercase;
}

button#generate-btn.btn-zoom-in {
    animation: btn-zoom-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0s 1;
}

@keyframes btn-zoom-in {
    0% {
        transform: scale(0.2);
        opacity: 0;
    }
    60% {
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

button#generate-btn:hover {
    background: radial-gradient(circle at 60% 40%, #fffbe6 80%, #ffe066 100%);
    color: #23243a;
    box-shadow: 0 0 48px 16px #ffe066cc, 0 0 0 8px #0a0a18cc, 0 4px 24px #ffe06699;
    transform: scale(1.08) rotate(-2deg);
}
@keyframes planet-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.star-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 0;
    pointer-events: none;
    background: transparent;
}
#star-canvas {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    display: block;
    background: transparent;
}
.star-bg:before {
}