table, th, td {
    border: 1px solid black;
    border-collapse: collapse;

}

table {
    width: 90%;
    margin: 0 auto;

}

th, td {

    padding: 8px;

}
a {
    display: inline-block;
    padding: 12px 22px;
    background: #0088cc;
    color: white;
    text-decoration: none;
    font-size: 16px;
    border-radius: 8px;
    margin: 5px;
    transition: 0.25s;
    font-weight: bold;
}


.center{
    text-align: center;
}
th{
    background-color: #8af4f8;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f2f2f2;
}

/* Заголовок */
h1 {
    text-align: center;
    background: #0073e6;
    color: white;
    margin: 0;
    padding: 15px 0;
    border-bottom: 2px solid black;
}

#menyy {
    width: 25%;
    float: left;
    border: 1px solid black;
    padding: 10px;
    box-sizing: border-box;
    min-height: 100vh;
}

#sisu {
    width: 75%;
    float: left;
    border: 1px solid black;
    padding: 10px;
    box-sizing: border-box;
    min-height: 100vh;
}

/* Список меню */
#menyy ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#menyy li {
    margin-bottom: 10px;
}

#menyy a {
    text-decoration: none;
    color: black;
    padding: 5px;
    display: block;
    border: 1px solid #ccc;
}

#menyy a:hover {
    background: #e0e0e0;
}

/* Контент */
#sisu h2 {
    margin-top: 0;
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

label {
    display: block;
    font-weight: bold;
    margin-top: 15px;
    margin-bottom: 5px;
}

input[type="text"],
input[type="date"],
textarea {
    width: 80%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
}

textarea {
    height: 120px;
    resize: vertical;
}

input[type="color"] {
    width: 60px;
    height: 35px;
    padding: 0;
    border: none;
    background: #fff;
    margin-top: 5px;
    cursor: pointer;
}

input[type="submit"] {
    margin-top: 20px;
    width: 80%;
    padding: 12px;
    background: #0088cc;
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 18px;
    cursor: pointer;
}