/* The game itself: its board, the next piece, and its move buttons */

/* The GAME OVER text's font (js/tetris.js loads it as the game starts, so it's there for the canvas) */
@import url('https://fonts.googleapis.com/css2?family=Pixelify+Sans&display=swap');

canvas#tetris {
    background-color: #111;
    box-shadow: 0 0 20px rgba(0,0,0,0.3);
    border-radius: 5px;
    border: 3px solid black;
    animation: borderColorChange 5s infinite, glowBorder 5s infinite; /* Combine animations */
}

@keyframes borderColorChange {
    0% { border-color: cyan }
    15% { border-color: blue }
    30% { border-color: orange }
    45% { border-color: yellow }
    60% { border-color: green }
    75% { border-color: purple }
    90% { border-color: red }
    100% { border-color: cyan }
}

@keyframes glowBorder {
    0% { box-shadow: 0 0 20px rgba(0, 255, 255, 0.7); } /* Cyan */
    15% { box-shadow: 0 0 20px rgba(0, 0, 255, 0.7); } /* Blue */
    30% { box-shadow: 0 0 20px rgba(255, 165, 0, 0.7); } /* Orange */
    45% { box-shadow: 0 0 20px rgba(255, 255, 0, 0.7); } /* Yellow */
    60% { box-shadow: 0 0 20px rgba(0, 128, 0, 0.7); } /* Green */
    75% { box-shadow: 0 0 20px rgba(128, 0, 128, 0.7); } /* Purple */
    90% { box-shadow: 0 0 20px rgba(255, 0, 0, 0.7); } /* Red */
    100% { box-shadow: 0 0 20px rgba(0, 255, 255, 0.7); } /* Cyan again to complete the cycle */
}

canvas#next-piece {
    background-color: #222;
    border-radius: 5px;
    margin: 10px;
}

.game-controls {
    display: flex;
    justify-content: space-between;
}

.game-controls button {
    background-color: slategray;
    color: white;
    height: 2em;
    width: 2em;
    font-size: 1.5em;
    text-align: center;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.game-controls button:hover {
    background-color: slategray;
    box-shadow: inset -2px -2px 5px rgba(255, 255, 255, 0.5), inset 2px 2px 5px rgba(0, 0, 0, 0.5);
}

/* Responsive styles */
@media (max-width: 650px) {
    canvas#tetris {
        order: 1;
        width: 100%;
        max-width: 300px;
        box-sizing: border-box;
    }
}