body{
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    justify-content: center;
    padding-top: 50px;
}

.container{
    border: 2px solid #5b87c6;
    padding: 20px 25px;
    width: 380px;
    box-sizing: border-box;
}

h2{
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 22px;
    font-weight: bold;
}

.form-group{
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    font-size: 16px;
}

.form-group label{
    width: 80px;
}

.form-group input[type="date"]{
    width: 180px;
    padding: 2px 5px;
    font-size: 15px;
    border: 1px solid #767676;
}

button{
    font-size: 15px;
    padding: 3px 10px;
    background-color: #f0f0f0;
    border: 1px solid #767676;
    border-radius: 2px;
    cursor: pointer;
    margin-top: 5px;
    margin-bottom: 15px;
}

button:hover{
    background-color: #e0e0e0;
}

.result{
    font-size: 16px;
    font-weight: bold;
}