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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

.game-container {
    text-align: center;
    padding: 20px;
}

h1 {
    margin-bottom: 20px;
    font-size: 2.5rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
    color: #00ffff;
}

.game-wrapper {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: flex-start;
}

.game-area {
    position: relative;
    background: #0a0a0a;
    border: 3px solid #00ffff;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

#gameCanvas {
    display: block;
}

.game-over {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 5px;
}

.game-over.hidden {
    display: none;
}

.game-over h2 {
    font-size: 2rem;
    color: #ff6b6b;
    margin-bottom: 20px;
}

.game-over p {
    font-size: 1.5rem;
    margin-bottom: 30px;
}

#restartBtn {
    padding: 15px 40px;
    font-size: 1.2rem;
    background: linear-gradient(135deg, #00ffff, #0080ff);
    border: none;
    border-radius: 8px;
    color: #000;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

#restartBtn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
}

.side-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.score-panel, .next-panel, .controls-panel {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid #00ffff;
    border-radius: 8px;
    padding: 15px;
    min-width: 180px;
}

.score-panel h3, .next-panel h3, .controls-panel h3 {
    color: #00ffff;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

#score {
    font-size: 2rem;
    font-weight: bold;
    color: #ffff00;
}

#nextCanvas {
    display: block;
    margin: 0 auto;
    background: #0a0a0a;
    border-radius: 4px;
}

.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-btn {
    padding: 10px 15px;
    font-size: 0.9rem;
    background: linear-gradient(135deg, #2a2a4a, #1a1a3a);
    border: 1px solid #00ffff;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    transition: all 0.2s;
}

.control-btn:hover {
    background: linear-gradient(135deg, #3a3a5a, #2a2a4a);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.control-btn:active {
    transform: scale(0.95);
}

.drop-btn {
    background: linear-gradient(135deg, #ff6b6b, #ee5a5a);
    border-color: #ff6b6b;
    font-weight: bold;
}

.drop-btn:hover {
    background: linear-gradient(135deg, #ff7b7b, #ff6a6a);
    box-shadow: 0 0 10px rgba(255, 107, 107, 0.5);
}

.keyboard-hint {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(0, 255, 255, 0.3);
    font-size: 0.85rem;
    color: #aaa;
    text-align: left;
}

.keyboard-hint p {
    margin: 3px 0;
}

.ai-panel {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid #ff00ff;
    border-radius: 8px;
    padding: 15px;
    min-width: 180px;
}

.ai-panel h3 {
    color: #ff00ff;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.ai-btn {
    width: 100%;
    padding: 12px 15px;
    font-size: 1rem;
    background: linear-gradient(135deg, #2a2a4a, #1a1a3a);
    border: 2px solid #ff00ff;
    border-radius: 5px;
    color: #fff;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: bold;
}

.ai-btn:hover {
    background: linear-gradient(135deg, #4a2a5a, #3a1a4a);
    box-shadow: 0 0 15px rgba(255, 0, 255, 0.4);
}

.ai-btn.active {
    background: linear-gradient(135deg, #ff00ff, #cc00cc);
    color: #000;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 10px rgba(255, 0, 255, 0.5); }
    50% { box-shadow: 0 0 25px rgba(255, 0, 255, 0.8); }
}

.ai-status {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #aaa;
}

.ai-status.active {
    color: #ff00ff;
    font-weight: bold;
}