html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    font-family: "Poppins", sans-serif;
    background: radial-gradient(circle at bottom, #0a0a0a 0%, #000 100%);
    color: #fff;
    perspective: 1000px;
}

/* --- Animated Neon Gradient Glow --- */
.gradient-bg {
    position: absolute;
    width: 200%;
    height: 200%;
    background: conic-gradient(
    from 0deg,
    #ff6600,
    #ffcc00,
    #ff0066,
    #ff6600
    );
    animation: spin 20s linear infinite;
    filter: blur(250px);
    opacity: 0.3;
    z-index: 0;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Parallax Terrain Canvases --- */
.terrain-layer {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#terrain-back {
    z-index: 1;
    opacity: 0.4;
}

#terrain-mid {
    z-index: 1;
    opacity: 0.6;
}

#terrain-front {
    z-index: 2;
    opacity: 0.9;
}

/* --- Particle Canvas --- */
#particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
}

/* --- Main Card --- */
.card {
    position: relative;
    z-index: 4;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    border-radius: 1.5rem;
    width: 420px;
    max-width: 90%;
    margin: 12vh auto;
    padding: 3rem 2.5rem;
    text-align: center;
    box-shadow: 0 0 40px rgba(255, 120, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05) rotate3d(1,1,0,7deg);
    box-shadow: 0 0 70px rgba(255, 100, 0, 0.7);
}

h1 {
    font-size: 2.4rem;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 15px rgba(255, 180, 120, 0.9);
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { text-shadow: 0 0 15px rgba(255, 180, 120, 0.9); }
    50% { text-shadow: 0 0 30px rgba(255, 180, 120, 1); }
}

p {
    font-size: 1rem;
    color: #ffe5cc;
    margin-bottom: 2rem;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

a.play-btn {
    display: inline-block;
    text-decoration: none;
    color: #fff;
    background: linear-gradient(90deg, #ff6600, #ff3300);
    padding: 1rem 2.5rem;
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(255, 100, 0, 0.4);
    transition: 0.3s;
}

a.play-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -75%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
    120deg,
    rgba(255,255,255,0.4),
    rgba(255,255,255,0)
    );
    transform: skewX(-25deg);
    transition: 0.75s;
}

a.play-btn:hover::before {
    left: 125%;
}

a.play-btn:hover {
    background: linear-gradient(90deg, #ffaa00, #ff4400);
    transform: scale(1.08);
    box-shadow: 0 0 40px rgba(255, 140, 0, 0.9);
}

footer {
    position: absolute;
    bottom: 15px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    z-index: 5;
}

footer a {
    color: rgba(255, 180, 120, 0.8);
    text-decoration: none;
}

footer a:hover {
    color: #fff;
}

@media (max-width: 480px) {
    .card {
    width: 100%;
    max-width: calc(100% - 2rem);
    padding: 2rem 1.5rem;
    }

    h1 {
    font-size: 1.8rem;
    }

    p {
    font-size: 0.9rem;
    }

    a.play-btn {
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
    }
}