html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
}

body {
    text-align: center;
    background-image: url("Assets/Background_2.png");
    background-size: cover;
    background-repeat: no-repeat;
    overflow: hidden;
    touch-action: manipulation;
}

header {
    margin: clamp(24px, 8vh, 60px) 16px 0;
    font-size: clamp(18px, 4vw, 25px);
}

main {
    margin-top: clamp(100px, 30vh, 250px);
}

footer {
    margin-top: clamp(100px, 30vh, 400px);
}

footer p {
    margin: 0;
}

.play-button {
    font-size: clamp(22px, 5vw, 28px);
    padding: 15px clamp(28px, 9vw, 40px);
    color: white;
    background: linear-gradient(#4CAF50, #2e7d32);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 6px #1b5e20;
    transition: all 0.15s ease;
}

.play-button:hover {
    background: linear-gradient(#66bb6a, #388e3c);
}

.play-button:active {
    transform: translateY(4px);
    box-shadow: 0 2px #1b5e20;
}

#game-container {
    position: fixed;
    inset: 0;
    display: none;
    width: 100%;
    height: 100%;
    height: 100dvh;
    overflow: hidden;
    touch-action: none;
}

#game-container canvas {
    display: block;
    touch-action: none;
}