aside.app-sidebar {
    position: fixed;
    height: 100%;
    padding: 32px 24px;
    background: linear-gradient(329.54deg, #15B6D6 0%, #15D6D6 100%);

    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

aside.app-sidebar img {
    width: 48px;
}

aside.app-sidebar footer a,
aside.app-sidebar footer button {
    width: 48px;
    height: 48px;

    border: 0;

    background: #12AFCB;
    border-radius: 16px;

    cursor: pointer;

    transition: background-color 0.2s;

    display: flex;
    justify-content: center;
    align-items: center;
}

aside.app-sidebar footer a:hover,
aside.app-sidebar footer button:hover {
    background: #17D6EB;
}