:root {
    --lktk-sidebar-width: 56px;
    --lktk-sidebar-bg: #e7eff6;
    --lktk-sidebar-focus: #135ca9;
    --lktk-sidebar-shadow: 4px 0 28px rgba(0, 0, 0, 0.08), 8px 0 48px rgba(0, 0, 0, 0.06);
    --lktk-sidebar-tooltip-border: #d8dee6;
    --lktk-sidebar-tooltip-text: #475566;
}

.lktk-sidebar-page {
    min-height: 100vh;
}

.lktk-sidebar-shell {
    display: flex;
    min-height: 100vh;
    align-items: stretch;
}

.lktk-sidebar-mount {
    width: var(--lktk-sidebar-width);
    min-width: var(--lktk-sidebar-width);
    background: var(--lktk-sidebar-bg);
    box-shadow: var(--lktk-sidebar-shadow);
    position: sticky;
    top: 0;
    height: 100vh;
    align-self: flex-start;
    z-index: 2;
    overflow: hidden;
}

.lktk-sidebar-content {
    flex: 1 1 auto;
    min-width: 0;
}

.lktk-sidebar-inner {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    padding: 6px 0;
}

.lktk-sidebar-main {
    display: flex;
    min-height: 0;
    min-width: 0;
    flex-direction: column;
    gap: 10px;
    overflow: hidden;
}

.lktk-sidebar-top {
    display: flex;
    justify-content: center;
    padding: 0;
}

.lktk-sidebar-menu-btn {
    border: 0;
    border-radius: 8px;
    width: 44px;
    height: 44px;
    background: transparent;
    cursor: pointer;
    padding: 8px;
}

.lktk-sidebar-menu-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.lktk-sidebar-menu-btn img {
    width: 30px;
    height: 30px;
    display: block;
}

.lktk-sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-top: 6px;
}

.lktk-sidebar-item-row {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 52px;
    width: 100%;
    padding: 0;
}

.lktk-sidebar-item-row.is-active {
    background: transparent;
}

.lktk-sidebar-item-link,
.lktk-sidebar-item-button {
    border: 0;
    border-radius: 8px;
    background: transparent;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 8px;
    text-decoration: none;
}

.lktk-sidebar-item-row:not(.is-active) .lktk-sidebar-item-link:hover,
.lktk-sidebar-item-row:not(.is-active) .lktk-sidebar-item-button:hover {
    background: transparent;
}

.lktk-sidebar-item-link:focus-visible,
.lktk-sidebar-item-button:focus-visible {
    outline: 2px solid var(--lktk-sidebar-focus);
    outline-offset: 2px;
}

.lktk-sidebar-item-link img,
.lktk-sidebar-item-button img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    display: block;
}

.lktk-sidebar-icon-stack {
    position: relative;
    width: 36px;
    height: 36px;
}

.lktk-sidebar-icon-stack > img {
    position: absolute;
    left: 0;
    top: 0;
}

.lktk-sidebar-icon-stack .lktk-sidebar-icon-overlay {
    width: 24px;
    height: 24px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.lktk-sidebar-icon-switch {
    position: relative;
    width: 36px;
    height: 36px;
    display: block;
}

.lktk-sidebar-icon-normal,
.lktk-sidebar-icon-active {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s ease;
}

.lktk-sidebar-icon-active {
    opacity: 0;
}

.lktk-sidebar-icon-normal > img,
.lktk-sidebar-icon-active {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.lktk-sidebar-item-row:hover .lktk-sidebar-icon-active,
.lktk-sidebar-item-row:focus-within .lktk-sidebar-icon-active {
    opacity: 1;
}

.lktk-sidebar-item-row:hover .lktk-sidebar-icon-normal,
.lktk-sidebar-item-row:focus-within .lktk-sidebar-icon-normal {
    opacity: 0;
}

.lktk-sidebar-tooltip {
    position: fixed;
    z-index: 2500;
    max-width: 320px;
    min-width: 224px;
    background: #ffffff;
    border: 1px solid var(--lktk-sidebar-tooltip-border);
    border-radius: 10px;
    padding: 10px 12px;
    box-shadow: 0 12px 34px rgba(10, 24, 44, 0.14);
    pointer-events: none;
}

.lktk-sidebar-tooltip::before,
.lktk-sidebar-tooltip::after {
    content: "";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

.lktk-sidebar-tooltip::before {
    left: -9px;
    border-right: 9px solid var(--lktk-sidebar-tooltip-border);
}

.lktk-sidebar-tooltip::after {
    left: -8px;
    border-right: 9px solid #ffffff;
}

.lktk-sidebar-tooltip-title {
    margin: 0;
    font-size: 13px;
    line-height: 1.25;
    font-weight: 600;
    color: var(--lktk-sidebar-tooltip-text);
}

.lktk-sidebar-tooltip-description {
    margin: 6px 0 0;
    font-size: 12px;
    line-height: 1.35;
    color: var(--lktk-sidebar-tooltip-text);
}

.lktk-sidebar-tooltip-divider {
    margin-top: 6px;
    border-top: 1px solid #e8edf3;
}

.lktk-sidebar-bottom {
    height: 36px;
    opacity: 0;
}