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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

h1 {
    color: #333;
    margin-bottom: 20px;
    font-size: 2.5em;
}

.info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 1.1em;
}

.info strong {
    color: #667eea;
}

#gameCanvas {
    border: 4px solid #667eea;
    border-radius: 10px;
    background: #1a1a2e;
    display: block;
    margin: 0 auto 20px;
}

.controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-warning {
    background: #f39c12;
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background: #e67e22;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #c0392b;
}

.instructions {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    text-align: left;
    font-size: 0.9em;
    color: #666;
}

.instructions p {
    margin: 8px 0;
    line-height: 1.5;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.modal-content h2 {
    color: #333;
    margin-bottom: 15px;
}

.modal-content img {
    margin: 20px 0;
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    display: none;
}

.game-over h2 {
    margin-bottom: 15px;
    font-size: 2em;
}

.game-over p {
    font-size: 1.5em;
    margin-bottom: 20px;
}