body {
    margin: 0;
    overflow: hidden;
    background-color: #0A1520;
    font-family: 'Inter', system-ui, sans-serif;
    color: #E0F2FE;
    user-select: none;
    -webkit-user-select: none;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
}

canvas {
    display: block;
}

#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden {
    display: none !important;
}

#start-screen, #game-over-screen {
    background: rgba(14, 165, 233, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    pointer-events: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #0EA5E9;
    text-shadow: 0 0 10px rgba(14, 165, 233, 0.5);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #ef4444;
}

p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

button {
    background: #0EA5E9;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    font-weight: bold;
}

button:hover {
    transform: scale(1.05);
    background: #0284C7;
}

#hud {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 1.5rem;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}