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

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

.container {
    text-align: center;
    padding: 20px;
    max-width: 800px;
    width: 100%;
}

h1 {
    margin-bottom: 20px;
    color: #e94560;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.game-info {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    font-size: 1.2em;
}

.game-container {
    display: flex;
    justify-content: center;
    margin: 40px 0;
}

.simon {
    width: 300px;
    height: 300px;
    position: relative;
    border-radius: 50%;
    background: #000;
    padding: 10px;
}

.button {
    width: 45%;
    height: 45%;
    position: absolute;
    cursor: pointer;
    transition: filter 0.3s ease;
}

.button:hover {
    filter: brightness(1.2);
}

.red {
    top: 0;
    left: 0;
    background: #ff0000;
    border-radius: 100% 0 0 0;
}

.blue {
    top: 0;
    right: 0;
    background: #0000ff;
    border-radius: 0 100% 0 0;
}

.green {
    bottom: 0;
    left: 0;
    background: #00ff00;
    border-radius: 0 0 0 100%;
}

.yellow {
    bottom: 0;
    right: 0;
    background: #ffff00;
    border-radius: 0 0 100% 0;
}

.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: #000;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.start-btn, .strict-btn {
    padding: 5px 10px;
    background: #e94560;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.start-btn:hover, .strict-btn:hover {
    background: #c1121f;
    transform: translateY(-2px);
}

.active {
    filter: brightness(1.5);
}

.message {
    margin: 20px 0;
    padding: 10px;
    border-radius: 5px;
    font-size: 1.2em;
    min-height: 40px;
}

.back-button {
    display: inline-block;
    padding: 10px 20px;
    background: #0f3460;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.back-button:hover {
    background: #16213e;
    transform: translateY(-2px);
}

@media (max-width: 600px) {
    .simon {
        width: 250px;
        height: 250px;
    }
    
    .center {
        width: 80px;
        height: 80px;
    }
    
    .game-info {
        flex-direction: column;
        gap: 10px;
    }
}