:root {
    --primary: #fbbf24;
    --secondary: #d97706;
    --accent: #38bdf8;
    --glass: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
}

body {
    background: radial-gradient(circle at top right, #1e1b4b, #0f172a);
    height: auto;
    min-height: 100vh;
    padding: 3rem 0;
    overflow-x: hidden;
    overflow-y: auto;
    color: #f8fafc;
}

.glass-panel {
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.8);
}

.stage-card {
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
}

.stage-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 0 25px rgba(251, 191, 36, 0.2);
}

.title-glow {
    text-shadow: 0 0 30px rgba(251, 191, 36, 0.3);
    background: linear-gradient(to bottom, #fbbf24, #d97706);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-play {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 4px 15px rgba(217, 119, 6, 0.3);
    transition: all 0.3s ease;
}

.btn-play:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217, 119, 6, 0.5);
    filter: brightness(1.1);
}

.selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

.stage-card {
    width: 100%;
    display: flex;
    flex-direction: column;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
}

.card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #0f172a; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}
.custom-scrollbar::-webkit-scrollbar { width: 6px; }
.custom-scrollbar::-webkit-scrollbar-track { background: transparent; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #334155; border-radius: 10px; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: #475569; }