body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #0a0a0a;
    color: #e0e0e0;
    font-family: 'Courier New', monospace;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none; /* Safari, Chrome */
    -moz-user-select: none;    /* Firefox */
    -ms-user-select: none;     /* IE/Edge */
}

.container {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.digit {
    font-size: 30vw;
    font-weight: bold;
    line-height: 1;
    transition: opacity 0.1s ease, transform 0.1s ease;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.audio-button {
    margin-top: 2rem;
    padding: 1rem 2rem;
    font-size: 1.5rem;
    background-color: #1a1a1a;
    color: #e0e0e0;
    border: 2px solid #333;
    border-radius: 50px;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s, transform 0.1s;
}

.audio-button:hover {
    background-color: #2a2a2a;
    border-color: #555;
}

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

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.digit.blink {
    animation: blink 0.3s ease 3;
}