body {
    margin: 0;
    padding: 60px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, Helvetica, Arial, sans-serif;
    background: #222222;
    color: #fafafa;
    text-align: center;
}

h1 {
    font-weight: 400;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
}

#stop {
    font-size: 1.5rem;
}

button {
    display: block;
    width: 280px;
    margin: 16px auto;
    padding: 18px 24px;

    font-size: 1rem;
    font-weight: 500;
    color: white;

    background: #c00222;
    border: 1px solid #ddd;
    border-radius: 2px;

    cursor: pointer;

    transition:
        background-color 0.2s ease,
        transform 0.15s ease,
        box-shadow 0.2s ease;
}

button:hover {
    background: #f2032b;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
    box-shadow: none;
}

button:focus-visible {
    outline: 3px solid #666;
    outline-offset: 3px;
}