:root {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
}

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

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: var(--bg-gradient);
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary);
}

.hud {
    position: absolute;
    top: 2rem;
    right: 2rem;
    /* Top Right */
    pointer-events: none;
    z-index: 10;
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    user-select: none;
    text-align: right;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hud div {
    font-variant-numeric: tabular-nums;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 2.5rem 4rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    z-index: 20;
    text-align: center;
}

.game-over.hidden {
    display: none;
}

.game-over h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(to right, #ef4444, #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.game-over button {
    padding: 0.75rem 2rem;
    font-size: 1.25rem;
    font-weight: 600;
    font-family: inherit;
    color: white;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.game-over button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    filter: brightness(1.1);
}

.game-over button:active {
    transform: translateY(0);
}