:root {
    --snake-color: white;
    --gecko-color: cyan;
}

body, html {
    margin: 0;
    padding: 0;
    overflow: hidden;
    height: 100%;
    width: 100%;
}

#controls {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    gap: 20px;
}

button {
    margin: 0;
    padding: 15px 30px;
    font-size: 18px;
    cursor: pointer;
    border: 2px solid;
    border-radius: 4px;
    transition: all 0.3s ease;
    outline: none;
    background: black !important;  /* Black fill for all buttons */
}

#snakeButton {
    color: var(--snake-color) !important;
    border-color: var(--snake-color) !important;
}

#geckoButton {
    color: var(--gecko-color) !important;
    border-color: var(--gecko-color) !important;
}

button:hover {
    opacity: 0.8 !important;
    transform: scale(1.05);
}

#snakeCanvas {
    position: fixed;
    top: 0;
    left: 0;
    display: block;
    background-color: #000;
    width: 100vw;
    height: 100vh;
    z-index: 1;
}