:root {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --primary-color: #0ea5e9;
    --accent-color: #f43f5e;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-main: 'Outfit', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background-image: radial-gradient(circle at 50% 50%, #1e293b 0%, #0f172a 100%);
}

.game-container {
    width: 100%;
    max-width: 800px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 15px 25px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
}

.stats {
    display: flex;
    gap: 20px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.label {
    font-size: 0.75rem;
    color: #94a3b8;
    text-transform: uppercase;
}

.value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
}

.canvas-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 0 50px rgba(14, 165, 233, 0.15);
    border: 2px solid var(--glass-border);
}

canvas {
    display: block;
    background-color: #020617;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    text-shadow: 0 0 20px var(--primary-color);
}

.overlay p {
    font-size: 1.1rem;
    color: #cbd5e1;
}

button {
    padding: 12px 32px;
    font-family: var(--font-main);
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(14, 165, 233, 0.6);
}

button:active {
    transform: translateY(1px);
}

.controls-hint {
    color: #64748b;
    font-size: 0.9rem;
}

.key {
    display: inline-block;
    padding: 2px 8px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.8rem;
    margin: 0 2px;
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.powerup-text {
    position: absolute;
    color: #fff;
    font-weight: bold;
    pointer-events: none;
    animation: floatUp 1s ease-out forwards;
    text-shadow: 0 0 5px rgba(0,0,0,0.5);
}

@keyframes floatUp {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(-30px); opacity: 0; }
}