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

body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
    font-size: 2.5rem;
}

h2 {
    text-align: center;
    color: #666;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

h3 {
    text-align: center;
    color: #888;
    margin-bottom: 20px;
    font-size: 1rem;
}

.start-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    border-radius: 10px;
    cursor: pointer;
    margin-bottom: 30px;
    transition: background-color 0.3s;
}

.start-btn:hover {
    background-color: #45a049;
}

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

.btn_container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.one_line, .two_line {
    display: flex;
    gap: 10px;
}

.btn {
    border: 5px solid black;
    border-radius: 20%;
    height: 100px;
    width: 100px;
    cursor: pointer;
    transition: all 0.3s;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.btn:hover {
    transform: scale(1.05);
}

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

/* Touch-specific styles */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        transform: none;
    }
    
    .btn:active {
        transform: scale(0.9);
    }
}

.red {
    background-color: red;
}

.green {
    background-color: green;
}

.yellow {
    background-color: yellow;
}

.blue {
    background-color: blue;
}

.flash {
    background-color: rgb(221, 11, 95);
}

.userflash {
    background-color: black;
}


@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    h1 {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    h2 {
        font-size: 1rem;
        margin-bottom: 10px;
    }
    
    h3 {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }
    
    .start-btn {
        padding: 12px 24px;
        font-size: 1rem;
        margin-bottom: 20px;
    }
    
    .btn {
        height: 80px;
        width: 80px;
        border-width: 4px;
    }
    
    .btn_container {
        gap: 8px;
    }
    
    .one_line, .two_line {
        gap: 8px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }
    
    h2 {
        font-size: 0.9rem;
    }
    
    h3 {
        font-size: 0.8rem;
    }
    
    .start-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .btn {
        height: 70px;
        width: 70px;
        border-width: 3px;
    }
    
    .btn_container {
        gap: 5px;
    }
    
    .one_line, .two_line {
        gap: 5px;
    }
}

@media (max-width: 320px) {
    .btn {
        height: 60px;
        width: 60px;
        border-width: 2px;
    }
}