body {
    font-family: Arial, sans-serif;
    background-color: #5f5f5f;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 7px 0;
    box-sizing: border-box;
}
header {
    background: #5f5f5f;
    color: #cecece;
    text-align: center;
    padding: 10px 0;
}
footer {
    background: #5f5f5f;
    color: #fff;
    text-align: center;
    padding: 7px 0;
    margin-top: auto;
}
.content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}
.tabs {
    width: 100%;
    box-sizing: border-box;
    max-width: 1000px;
    background: #7d7d7d;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.tab-header {
    display: flex;
    cursor: default;
}           
.tab-header div {
flex: 1;
padding: 15px;
text-align: center;
background: #3c3c3c;
border-bottom: 2px solid transparent;
transition: background 0.3s, border-bottom 0.3s;
}
.tab-header div:hover {
background: #a1a1a1;
}
.tab-header .active {
background: #727272;
border-bottom: 2px solid #32409f;
}
.tab-content {
display: none;
padding: 20px;
}
.tab-content.active {
display: block;
padding: 0px 7px;
}
button {
background-color: #535353;
border: none;
border-radius: 4px;
padding: 6px 12px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
transition: background 0.3s, border-bottom 0.3s;
}
button:hover {
background-color: #a1a1a1;
cursor: default;
}
button.imagelink {
    font-family: Arial, sans-serif;
}
input[type=button], input[type=submit], input[type=reset] {
    background-color: #535353;
    border: none;
    border-radius: 2px;
    padding: 6px 12px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
}
input[type=button]:hover, input[type=submit]:hover, input[type=reset]:hover {
    background-color: #a1a1a1;
    cursor: default;
}