@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;900&display=swap');

:root {
    --gold: #d4af37;
    --cyan: #00f3ff;
    --deep-blue: #020b16;
    --holo-glow: rgba(0, 243, 255, 0.3);
    --glass: rgba(0, 20, 30, 0.8);
}

body, html {
    margin: 0;
    padding: 0;
    background-color: var(--deep-blue);
    color: var(--cyan);
    font-family: 'Orbitron', sans-serif;
    overflow: hidden;
    height: 100%;
    /* Subtle CRT flicker effect for the whole screen */
    animation: master-flicker 0.15s infinite;
}

/* 1. THE 3D GROUND GRID */
.hologram-grid {
    position: fixed;
    bottom: -20%;
    left: -50%;
    width: 200%;
    height: 100%;
    background-image: 
        linear-gradient(var(--holo-glow) 2px, transparent 2px),
        linear-gradient(90deg, var(--holo-glow) 2px, transparent 2px);
    background-size: 60px 60px;
    transform: perspective(500px) rotateX(75deg);
    z-index: 0;
    animation: grid-advance 10s linear infinite;
    mask-image: linear-gradient(to top, rgba(0,0,0,1), rgba(0,0,0,0));
}

/* 2. GLASSMORPHISM INTERFACE (HUD) */
.hud-top, .hud-bottom {
    position: absolute;
    width: 94%;
    left: 3%;
    background: var(--glass);
    backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid var(--cyan);
    box-shadow: 0 0 15px var(--holo-glow), inset 0 0 10px var(--holo-glow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.hud-top { top: 20px; padding: 10px 30px; border-radius: 4px; border-bottom: 3px solid var(--cyan); }
.hud-bottom { bottom: 20px; padding: 20px 30px; border-radius: 4px; border-top: 3px solid var(--cyan); }

/* 3. THE CORE SPIN BUTTON */
.btn-spin-main {
    width: 120px;
    height: 120px;
    background: transparent;
    border: 2px solid var(--cyan);
    border-radius: 50%;
    color: var(--cyan);
    font-weight: 900;
    cursor: pointer;
    position: relative;
    box-shadow: 0 0 20px var(--cyan);
    transition: 0.2s;
    overflow: hidden;
}

/* Internal "pulsing" light for the button */
.btn-spin-main::after {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 100%; height: 100%;
    background: var(--cyan);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0.3;
    animation: pulse-ring 2s infinite;
}

.btn-spin-main:hover {
    background: var(--cyan);
    color: var(--deep-blue);
    box-shadow: 0 0 40px var(--cyan);
}

/* 4. ANIMATIONS */
@keyframes grid-advance {
    from { background-position: 0 0; }
    to { background-position: 0 60px; }
}

@keyframes master-flicker {
    0% { opacity: 0.99; }
    50% { opacity: 1; }
    100% { opacity: 0.98; }
}

@keyframes pulse-ring {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1.5); opacity: 0; }
}

/* 5. TEXT GLOW */
.glow-text {
    text-shadow: 0 0 10px var(--cyan), 0 0 20px var(--cyan);
    color: #fff;
}

#credit-count {
    font-size: 1.5rem;
    color: var(--gold);
    text-shadow: 0 0 10px var(--gold);
}