/* ═══════════════════════════════════════════════════
   Wiki / Knowledge Base
   ═══════════════════════════════════════════════════ */

/* ── Two-panel Layout ── */

.wiki-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0;
    height: calc(100vh - var(--topbar-height) - 48px);
    margin: -24px;
}

/* ── Sidebar Tree Panel ── */

.wiki-tree {
    display: flex;
    flex-direction: column;
    background: var(--md-surface);
    border-right: 1px solid var(--md-outline-variant);
    overflow: hidden;
}

.wiki-tree__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--md-outline-variant);
    flex-shrink: 0;
}

.wiki-tree__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--md-on-surface);
}

.wiki-tree__add {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface-variant);
    transition: background var(--duration-short);
}

.wiki-tree__add:hover {
    background: var(--md-surface-container-highest);
}

.wiki-tree__add .material-symbols-outlined {
    font-size: 20px;
}

.wiki-tree__search {
    padding: 12px 16px;
    flex-shrink: 0;
}

.wiki-tree__search-input {
    width: 100%;
    padding: 8px 12px 8px 32px;
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-sm);
    background: var(--md-surface-container-low);
    color: var(--md-on-surface);
    font-size: 13px;
    outline: none;
    transition: border-color var(--duration-short);
}

.wiki-tree__search-input:focus {
    border-color: var(--md-primary);
}

.wiki-tree__search-wrap {
    position: relative;
}

.wiki-tree__search-wrap .material-symbols-outlined {
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    color: var(--md-on-surface-variant);
    pointer-events: none;
}

.wiki-tree__body {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

/* ── Tree Items ── */

.wiki-tree-list {
    list-style: none;
}

.wiki-tree-item {
    user-select: none;
}

.wiki-tree-item__row {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 16px 6px 12px;
    cursor: pointer;
    color: var(--md-on-surface);
    font-size: 13px;
    transition: background var(--duration-short);
    border-radius: 0;
}

.wiki-tree-item__row:hover {
    background: var(--md-surface-container);
}

.wiki-tree-item__row.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    font-weight: 600;
}

.wiki-tree-item__expand {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: 4px;
    transition: transform var(--duration-short) var(--easing-standard);
}

.wiki-tree-item__expand .material-symbols-outlined {
    font-size: 18px;
    color: var(--md-on-surface-variant);
}

.wiki-tree-item__expand--expanded {
    transform: rotate(90deg);
}

.wiki-tree-item__expand--hidden {
    visibility: hidden;
}

.wiki-tree-item__icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.wiki-tree-item__icon .material-symbols-outlined {
    font-size: 18px;
    color: var(--md-on-surface-variant);
}

.wiki-tree-item__icon--folder .material-symbols-outlined {
    color: var(--color-in-progress);
}

.wiki-tree-item__label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Nested levels via padding */
.wiki-tree-item--level-1 .wiki-tree-item__row { padding-left: 28px; }
.wiki-tree-item--level-2 .wiki-tree-item__row { padding-left: 44px; }
.wiki-tree-item--level-3 .wiki-tree-item__row { padding-left: 60px; }

/* Collapsed children */
.wiki-tree-item__children {
    display: none;
}

.wiki-tree-item--expanded > .wiki-tree-item__children {
    display: block;
}

/* ── Company filter in tree ── */

.wiki-tree__company-filter {
    padding: 0 16px 8px;
    flex-shrink: 0;
}

.wiki-tree__company-select {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-sm);
    background: var(--md-surface);
    color: var(--md-on-surface);
    font-size: 12px;
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%2373777F' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 4px center;
    background-size: 18px;
    padding-right: 24px;
}

/* ═══════════════════════════════════════════════════
   Wiki Content Panel
   ═══════════════════════════════════════════════════ */

.wiki-content {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--md-surface-container-low);
}

/* ── Content Header ── */

.wiki-content__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--md-outline-variant);
    background: var(--md-surface);
    flex-shrink: 0;
}

.wiki-content__title {
    font-size: 20px;
    font-weight: 400;
    color: var(--md-on-surface);
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.wiki-content__actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.wiki-content__meta {
    font-size: 12px;
    color: var(--md-on-surface-variant);
    margin-right: 12px;
    white-space: nowrap;
}

/* ── Version History Dropdown ── */

.wiki-version-dropdown {
    position: relative;
}

.wiki-version-dropdown__trigger {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-sm);
    background: var(--md-surface);
    color: var(--md-on-surface-variant);
    font-size: 12px;
    cursor: pointer;
    transition: border-color var(--duration-short);
}

.wiki-version-dropdown__trigger:hover {
    border-color: var(--md-outline);
}

.wiki-version-dropdown__trigger .material-symbols-outlined {
    font-size: 16px;
}

.wiki-version-dropdown__menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    min-width: 280px;
    background: var(--md-surface);
    border-radius: var(--radius-sm);
    box-shadow: var(--elevation-3);
    z-index: 100;
    max-height: 320px;
    overflow-y: auto;
}

.wiki-version-dropdown__menu.open {
    display: block;
}

.wiki-version-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    cursor: pointer;
    transition: background var(--duration-short);
    font-size: 13px;
    color: var(--md-on-surface);
}

.wiki-version-item:hover {
    background: var(--md-surface-container);
}

.wiki-version-item.active {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.wiki-version-item__date {
    font-size: 12px;
    color: var(--md-on-surface-variant);
    white-space: nowrap;
}

.wiki-version-item__author {
    font-weight: 500;
    flex: 1;
}

/* ── Article View (rendered markdown) ── */

.wiki-content__body {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
}

.wiki-article {
    max-width: 800px;
    margin: 0 auto;
    background: var(--md-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
    padding: 40px;
}

.wiki-article h1 {
    font-size: 28px;
    font-weight: 400;
    color: var(--md-on-surface);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--md-outline-variant);
}

.wiki-article h2 {
    font-size: 22px;
    font-weight: 400;
    color: var(--md-on-surface);
    margin-top: 32px;
    margin-bottom: 12px;
}

.wiki-article h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--md-on-surface);
    margin-top: 24px;
    margin-bottom: 8px;
}

.wiki-article p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--md-on-surface);
    margin-bottom: 12px;
}

.wiki-article ul,
.wiki-article ol {
    margin-left: 24px;
    margin-bottom: 12px;
}

.wiki-article li {
    font-size: 14px;
    line-height: 1.7;
    color: var(--md-on-surface);
    margin-bottom: 4px;
}

.wiki-article code {
    font-family: 'Roboto Mono', monospace;
    font-size: 13px;
    background: var(--md-surface-container);
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    color: var(--md-on-surface);
}

.wiki-article pre {
    background: var(--md-surface-container);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 16px;
    overflow-x: auto;
}

.wiki-article pre code {
    background: none;
    padding: 0;
    font-size: 13px;
    line-height: 1.5;
}

.wiki-article blockquote {
    border-left: 4px solid var(--md-primary);
    padding: 8px 16px;
    margin: 12px 0;
    background: var(--md-surface-container-low);
    border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.wiki-article blockquote p {
    color: var(--md-on-surface-variant);
    margin-bottom: 0;
}

.wiki-article table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 16px;
}

.wiki-article table th,
.wiki-article table td {
    padding: 10px 14px;
    border: 1px solid var(--md-outline-variant);
    font-size: 14px;
    text-align: left;
}

.wiki-article table th {
    background: var(--md-surface-container);
    font-weight: 500;
}

.wiki-article img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: 12px 0;
}

.wiki-article a {
    color: var(--md-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.wiki-article a:hover {
    text-decoration-thickness: 2px;
}

.wiki-article hr {
    border: none;
    height: 1px;
    background: var(--md-outline-variant);
    margin: 24px 0;
}

/* ── Markdown Editor ── */

.wiki-editor {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    padding: 24px;
}

.wiki-editor__toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 8px 12px;
    background: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    border-bottom: none;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    flex-wrap: wrap;
}

.wiki-editor__toolbar-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface-variant);
    transition: background var(--duration-short);
}

.wiki-editor__toolbar-btn:hover {
    background: var(--md-surface-container);
}

.wiki-editor__toolbar-btn.active {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.wiki-editor__toolbar-btn .material-symbols-outlined {
    font-size: 20px;
}

.wiki-editor__toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--md-outline-variant);
    margin: 0 6px;
}

.wiki-editor__textarea {
    flex: 1;
    width: 100%;
    padding: 20px;
    border: 1px solid var(--md-outline-variant);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    background: var(--md-surface);
    color: var(--md-on-surface);
    font-family: 'Roboto Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: none;
    outline: none;
    transition: border-color var(--duration-short);
}

.wiki-editor__textarea:focus {
    border-color: var(--md-primary);
}

.wiki-editor__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
}

.wiki-editor__hint {
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

.wiki-editor__actions {
    display: flex;
    gap: 8px;
}

/* ── Empty state ── */

.wiki-content__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--md-on-surface-variant);
}

.wiki-content__empty .material-symbols-outlined {
    font-size: 64px;
    opacity: 0.3;
    margin-bottom: 16px;
}

.wiki-content__empty p {
    font-size: 16px;
}

.wiki-content__empty-hint {
    font-size: 13px;
    margin-top: 4px;
    color: var(--md-outline);
}