body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
}

h1 {
    color: #0056b3;
}

h2 {
    color: #007bff;
    margin-bottom: 20px;
}

#relogio, #cronometro {
    font-size: 3em;
    margin: 20px 0;
    padding: 10px 20px;
    border: 2px solid #007bff;
    border-radius: 10px;
    background-color: #e9f5ff;
}

hr {
    width: 80%;
    border: 1px solid #ccc;
    margin: 40px 0;
}

div {
    margin-top: 20px;
}

button {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 10px 20px;
    margin: 5px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #218838;
}

#btPausar {
    background-color: #ffc107;
    color: #333;
}

#btPausar:hover {
    background-color: #e0a800;
}

#btZerar {
    background-color: #dc3545;
}

#btZerar:hover {
    background-color: #c82333;
}