body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #007bff;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.wrapper {
    width: 100%;
    max-width: 400px;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.title {
    color: #333;
    text-align: center;
}

.label {
    color: #333;
}

.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

.btn-classic {
    width: 100%;
    padding: 10px 20px;
    background-color: #28a745;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.btn-classic:hover {
    background-color: #218838;
}

.countdown {
    text-align: center;
    font-size: 24px;
    margin-top: 20px;
}

.text-danger {
    color: #dc3545;
}