html,
body {
    margin: 0;
    height: 100%;
}

#docs-tabs {
    display: flex;
    gap: 8px;
    padding: 12px 20px;
    background: #1b1b1b;
}

#docs-tabs button {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: #3b4151;
    color: #fff;
}

#docs-tabs button.active {
    background: #61affe;
    color: #1b1b1b;
}

#viewer {
    display: block;
    width: 100%;
    height: calc(100% - 52px);
    border: none;
}