.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    border-right: 1px solid var(--border);
    width: var(--nav-w);
    height: 100vh;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--bg);

    --padding: 30px;
}

/* Sidebar Top */

#sidebar-top {
    border-bottom: 1px solid var(--border);
    padding: var(--padding);
    padding-top: calc(var(--padding) * 2);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#sidebar-top-head {
    padding: 0;
    margin: 0;
}

#sidebar-top-content {
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0px;
}

#sidebar-top-content p {
    font-size: calc(var(--font-size) - 0.15rem);
    margin: 0;
    padding: 0;
    height: fit-content;
    width: fit-content;
}

/* Navbar */

#navbar {
    list-style: none;
    display: flex;
    flex-direction: column;
    padding: var(--padding);
}

.navbar-group {
    margin-top: 15px;
    margin-bottom: 5px;
    font-size: calc(var(--font-size) + 0.1rem);
    font-family: var(--serif);
}

.navbar-item {
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
    position: relative;
    font-weight: normal;
    margin: 5px 0px 5px 0px;
}

.nav-link {
    font-size: 0.75rem;
}

.nav-link:hover {
    color: var(--text);
}

.nav-link.active {
    color: var(--text);
    font-weight: bold;
}

.nav-link::before {
    content: "";
    position: absolute;
    background: var(--text);
    width: 2px;
    height: 0px;
    top: 50%;
    transform: translateY(-50%);
    left: calc(var(--padding) * (-1) + 1px);
    border-radius: 20px;
    transition: height 0.18s;
}

.nav-link.active::before {
    height: 14px;
}

.idx {
    font-weight: normal;
    font-size: 0.75rem;
}

/* Sidebar Bottom */

.sidebar-bottom-margin {
    margin-top: auto;
}

/* Language and Color */

.website-config {
    height: fit-content;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
    gap: 20px;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Color Switch */

.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--surface);
    border-radius: 26px;
    border: 1px solid var(--border);
}

.slider:hover {
    border: 1px solid var(--text);
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: var(--muted);
    transition: 0.4s;
    border-radius: 50%;
}

input:checked+.slider:before {
    background-color: var(--bg);
}

input:checked+.slider {
    background-color: var(--surface);
}

input:checked+.slider:before {
    transform: translateX(24px);
}

/* Language Dropdown*/

.lang-dropdown {
    display: flex;
    gap: 3px;
    width: 91px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: none;
    background: none;
}

.lang-dropdown.show-border {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg2);
}

.lang-menu {
    display: flex;
    align-items: center;
    gap: 3px;
}

.lang-item {
    cursor: pointer;
    background-color: var(--surface);
    width: 40px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--muted);
}

.lang-item:hover {
    border-color: var(--text);
    color: var(--text);
}

#lang-button {
    width: 40px;
    height: 30px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;

    cursor: pointer;
    background-color: var(--surface);
    color: var(--muted);
    border-radius: 8px;
    border: 1px solid var(--border);
    padding: 3px 6px;

    font-size: 14px;
}

#lang-button:hover {
    border-color: var(--text);
    color: var(--text);
}

/* Contact */

#sidebar-bottom {
    height: 100px;
    padding: calc(var(--padding) / 2);
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: flex-start;
}

#sidebar-bottom a {
    font-size: calc(var(--font-size) - 0.15rem);
}