:root {
    --primary-color: #7b68ee;
    --secondary-color: #4a4489;
    --accent-color: #ff6b6b;
    --background-color: #121212;
    --text-color: #ffffff;
    --grid-line-color: rgba(255, 255, 255, 0.1);
    --button-hover-color: #9485f0;
}

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

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.game-container {
    display: grid;
    grid-template-areas:
        "score next"
        "canvas canvas"
        "controls controls"
        "buttons buttons"
        "ai ai";
    gap: 0.5rem;
    max-width: 100%;
    padding: 0.5rem;
    background: linear-gradient(145deg, var(--secondary-color), var(--background-color));
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.score-section {
    grid-area: score;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 1.2rem;
    padding: 0.5rem;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.next-piece {
    grid-area: next;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.next-piece h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

#tetris-canvas {
    grid-area: canvas;
    width: 300px;
    height: 600px;
    border-radius: 5px;
    background-color: rgba(0, 0, 0, 0.5);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
    justify-self: start;
}

#next-piece-canvas {
    width: 80px;
    height: 80px;
    margin-top: 0.5rem;
}

.controls-instructions {
    grid-area: controls;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
}

.controls-instructions h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.controls-instructions p {
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

.game-buttons {
    grid-area: buttons;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

button, .button {
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.15s, transform 0.15s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

button:hover, button:focus, .button:hover, .button:focus {
    background-color: var(--button-hover-color);
}

button:active, .button:active {
    transform: scale(0.95);
}

.button-primary {
    background-color: #28a745;
}

.button-primary:hover, .button-primary:focus {
    background-color: #218838;
}

.button-warning {
    background-color: #ffc107;
    color: #212529;
}

.button-warning:hover, .button-warning:focus {
    background-color: #e0a800;
}

.ai-insight {
    grid-area: ai;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.ai-insight h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.ai-vs-ai-panel {
    grid-area: ai;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 1rem;
    border-radius: 8px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 0.5rem;
}

.ai-player {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    border-left: 4px solid;
}

.ai-player-1 {
    border-left-color: #dc3545;
}

.ai-player-2 {
    border-left-color: #007bff;
}

.ai-player h4 {
    margin: 0 0 0.5rem 0;
    color: var(--text-color);
    font-size: 1rem;
}

.ai-thinking, .ai-plan {
    font-size: 0.8rem;
    line-height: 1.3;
    min-height: 2.5rem;
    padding: 0.5rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.game-controls {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.current-turn {
    grid-column: 1 / -1;
    text-align: center;
    font-weight: bold;
    padding: 0.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

#ai1-thinking, #ai2-thinking {
    color: #ffc107;
}

#ai1-plan, #ai2-plan {
    color: #28a745;
}

/* Media queries for responsive design */
@media (min-width: 768px) {
    .game-container {
        grid-template-areas:
            "canvas score"
            "canvas next"
            "canvas controls"
            "canvas buttons"
            "canvas ai";
        grid-template-columns: auto 1fr;
    }

    #tetris-canvas {
        width: 320px;
        height: 640px;
    }

    .game-container {
        max-width: 700px;
        margin: 0 auto;
    }
}

@media (max-width: 767px) {
    .game-container {
        padding: 0.75rem;
    }

    .game-buttons {
        flex-direction: column;
        align-items: center;
    }

    .button {
        width: 100%;
        max-width: 200px;
    }

    .ai-vs-ai-panel {
        grid-template-columns: 1fr;
    }

    .game-controls {
        flex-direction: column;
        align-items: center;
    }
}

/* Game over and pause overlays */
.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 5px;
    color: var(--text-color);
}

.game-overlay h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.game-overlay p {
    font-size: 1.2rem;
    text-align: center;
}