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

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a, #1e293b);
}

.game-container {
    width: 360px;
    height: 640px;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

canvas {
    background: linear-gradient(180deg, #1e293b, #0f172a);
}

h1 {
    font-size: 3rem;
    color: #38bdf8;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(56, 189, 248, 0.3);
}

h2 {
    font-size: 2.5rem;
    color: #ef4444;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(239, 68, 68, 0.3);
}

.menu-screen, .game-over-screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(15, 23, 42, 0.95);
    color: #e2e8f0;
    z-index: 10;
    backdrop-filter: blur(8px);
}

.score, .high-score {
    font-size: 1.5rem;
    margin: 0.5rem 0;
    color: #94a3b8;
}

.btn {
    padding: 1rem 2rem;
    font-size: 1.2rem;
    color: white;
    background: #0ea5e9;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    margin-top: 1rem;
    transition: all 0.2s;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1),
                0 1px 3px rgba(0, 0, 0, 0.1),
                0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.btn:hover {
    transform: translateY(-2px);
    background: #0284c7;
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.2),
                0 2px 4px rgba(0, 0, 0, 0.1),
                0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.btn:active {
    transform: translateY(0);
}

.btn-pause {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
    color: #e2e8f0;
    background: rgba(148, 163, 184, 0.1);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    backdrop-filter: blur(4px);
}

.btn-pause:hover {
    background: rgba(148, 163, 184, 0.2);
    transform: scale(1.05);
}

.score-container {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 2rem;
    color: #38bdf8;
    text-shadow: 0 2px 10px rgba(56, 189, 248, 0.3);
}

.hidden {
    display: none;
}