.tb {
    border: 1px solid #000;
    border-collapse: collapse;
}

.tb td, .tb th {
    border: 1px solid #000;
    padding: 5px;
}

.ac {
    text-align: center;
}

.ar {
    text-align: right;
}

input {
    height: 20px;
    padding: 5px;
}

select {
    height: 35px;
    background-color: #fff;
    padding: 5px;
    border: 1px solid #000;
}

.text-block {
    white-space: pre;
}

.reminder {
    font-weight: bold;
    border: 2px #900 solid;
    padding: 5px;
    margin: 15px;
    width: 100%;
}

.border {
    border: 1px solid #000;
    background-color: #f0f0f0;
    padding: 5px;
}

body {
    font-family: Arial, Helvetica, sans-serif;
}

.btn {
    cursor: pointer;
    padding: 10px;
    color: #000;
    background-color: #d6d6f0;
    border-color: #333;
    border-radius: 10px;
    text-decoration: none;
}

.btn:hover {
    background-color: #b6b6f0;
}

.btnmenu {
    background-color: #4d4dbe;
    color: #e2e2f5;
}

.btnmenu:hover {
    background-color: #7f7fd0;
}

.flex-container {
    display: flex;
    flex-wrap: wrap;
    margin: 5px;
}

.flex-container a {
    margin: 5px;
}