:root {
    --bg-dark: #0F0F23;
    --primary: #6366F1;
    --primary-glow: rgba(99, 102, 241, 0.6);
    --secondary: #A78BFA;
    --accent: #34D399;
    --accent-glow: rgba(52, 211, 153, 0.6);
    --error: #F43F5E;
    --error-glow: rgba(244, 63, 94, 0.6);
    --text-main: #FFFFFF;
    --text-muted: rgba(255, 255, 255, 0.6);
    
    --powerup-magnet: #FBBF24;
    --powerup-shield: #38BDF8;
    --powerup-slowmo: #C084FC;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    font-family: 'Inter', sans-serif;
}

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow: hidden;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1E1B4B 0%, var(--bg-dark) 100%);
}

#game-canvas {
    width: 100%;
    height: 100%;
    max-width: 1000px;
    box-shadow: 0 0 100px rgba(0,0,0,0.8);
    background: transparent;
    z-index: 10;
}

/* UI Layer */
#ui-layer {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 100;
    display: flex;
    justify-content: center;
}

.hidden { display: none !important; }
.text-center { text-align: center; }

/* HUD */
#hud {
    position: absolute;
    top: 0; left: 0; right: 0;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    max-width: 1000px;
    width: 100%;
}

.score-box {
    background: rgba(15, 15, 35, 0.8);
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.score-box .label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 2px;
}

.score-box .value-container {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

#score-val {
    font-size: 2rem;
    font-weight: 900;
    font-family: monospace;
    text-shadow: 0 0 15px var(--primary-glow);
}

.score-box .unit {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 700;
}

/* Powerups UI */
.powerups-container {
    display: flex;
    gap: 12px;
    flex-direction: column;
}

.powerup-indicator {
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 0.85rem;
    border: 1px solid rgba(255,255,255,0.1);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.magnet-indicator { color: var(--powerup-magnet); border-color: rgba(251, 191, 36, 0.3); box-shadow: 0 0 15px rgba(251, 191, 36, 0.2); }
.shield-indicator { color: var(--powerup-shield); border-color: rgba(56, 189, 248, 0.3); box-shadow: 0 0 15px rgba(56, 189, 248, 0.2); }
.slowmo-indicator { color: var(--powerup-slowmo); border-color: rgba(192, 132, 252, 0.3); box-shadow: 0 0 15px rgba(192, 132, 252, 0.2); }

/* Overlays */
.overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 15, 35, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
}

.glass-panel {
    background: linear-gradient(145deg, rgba(30, 27, 75, 0.9), rgba(15, 15, 35, 0.95));
    border: 1px solid rgba(99, 102, 241, 0.3);
    box-shadow: 0 30px 60px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: 24px;
    max-width: 450px;
    width: 90%;
    position: relative;
    overflow: hidden;
}

.glass-panel::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.neon-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 10px;
    color: #fff;
    text-shadow: 0 0 20px var(--primary-glow), 0 0 40px var(--primary-glow);
    font-style: italic;
    letter-spacing: -1px;
}

.neon-error {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--error);
    text-shadow: 0 0 20px var(--error-glow);
    margin-bottom: 5px;
    letter-spacing: 2px;
}

.subtitle {
    color: var(--secondary);
    margin-bottom: 30px;
    font-size: 1rem;
}

.controls-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.key {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 4px 10px;
    border-radius: 6px;
    color: #fff;
    font-weight: 700;
    font-size: 0.8rem;
    box-shadow: 0 2px 0 rgba(255,255,255,0.1);
}

.record-box {
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 30px;
    border: 1px solid rgba(255,255,255,0.05);
}

.record-box .label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 5px;
}

.accent-text {
    font-size: 2rem;
    font-weight: 900;
    color: var(--accent);
    text-shadow: 0 0 15px var(--accent-glow);
    font-family: monospace;
}

.ghost-status {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 5px;
    font-style: italic;
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 30px;
}

.result-box {
    background: rgba(0,0,0,0.3);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
}

.result-box .label { font-size: 0.75rem; color: var(--text-muted); font-weight: 700; margin-bottom: 5px; }
.result-box .value { font-size: 1.5rem; font-weight: 900; font-family: monospace; }

/* Buttons */
.glow-btn {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
    font-weight: 800;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 1px;
    border: none;
    pointer-events: auto;
}

.primary-btn {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.primary-btn:hover {
    background: #7175f5;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.8);
}

.primary-btn:active {
    transform: translateY(1px);
}

.secondary-btn {
    background: transparent;
    color: var(--text-main);
    border: 1px solid rgba(255,255,255,0.2);
}

.secondary-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.4);
}

.actions {
    display: flex;
    gap: 15px;
}

/* Tunnel Animation */
.tunnel-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.3;
}

@keyframes flash {
    0% { opacity: 1; filter: brightness(2); }
    100% { opacity: 0; filter: brightness(1); }
}

.flash-screen {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: white;
    z-index: 90;
    pointer-events: none;
    animation: flash 0.5s ease-out forwards;
}

@media (max-width: 600px) {
    .glass-panel { padding: 30px 20px; }
    .neon-title { font-size: 2.2rem; }
    .actions { flex-direction: column; }
}