:root {
    --bg: #f5f3ef;
    --surface: #ffffff;
    --surface-soft: #f8f9fb;
    --ink: #24211d;
    --muted: #6c665f;
    --line: #d7d0c6;
    --link: #2457a6;
    --accent: #0f766e;
    --danger: #b42318;
    --success: #287a3e;
    --shadow: 0 18px 40px rgba(36, 33, 29, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.65;
}

a {
    color: var(--link);
}

img {
    max-width: 100%;
    height: auto;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem clamp(1rem, 4vw, 3rem);
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 20;
}

.brand {
    color: var(--ink);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.05rem;
    font-weight: 700;
    text-decoration: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
}

.site-nav a,
.site-nav button {
    color: var(--link);
    background: none;
    border: 0;
    cursor: pointer;
    font: inherit;
    padding: 0;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav button:hover {
    text-decoration: underline;
}

.site-nav form {
    margin: 0;
}

.page-shell {
    width: min(1120px, calc(100% - 2rem));
    margin: 1.2rem auto 3rem;
}

.wiki-article,
.admin-panel,
.auth-panel .admin-form,
.empty-state,
.page-index {
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.wiki-article {
    padding: clamp(1.2rem, 3vw, 2.5rem);
}

.article-header h1,
.admin-header h1,
.empty-state h1,
.auth-panel h1 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 500;
    line-height: 1.2;
}

.article-header {
    margin-bottom: 1.3rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--line);
}

.article-content h2,
.article-content h3,
.article-content h4 {
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 500;
    line-height: 1.25;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.25rem;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.article-content th,
.article-content td {
    border: 1px solid var(--line);
    padding: 0.55rem;
    vertical-align: top;
}

.article-content blockquote {
    margin-left: 0;
    padding: 0.7rem 1rem;
    border-left: 4px solid var(--accent);
    background: #f3faf8;
}

.infobox {
    float: right;
    width: min(300px, 100%);
    margin: 0 0 1rem 1.4rem;
    background: var(--surface-soft);
    border: 1px solid var(--line);
    padding: 0.55rem;
    font-size: 0.92rem;
}

.infobox caption {
    font-weight: 700;
    padding: 0.5rem;
}

.toc {
    display: table;
    max-width: 100%;
    margin: 1rem 0;
    padding: 0.85rem 1rem;
    background: var(--surface-soft);
    border: 1px solid var(--line);
}

.toc ul {
    margin-bottom: 0;
}

.page-index {
    margin-top: 1rem;
    padding: 1.2rem;
}

.page-index h2 {
    margin-top: 0;
    font-size: 1.15rem;
}

.page-index > ul {
    columns: 2;
    padding-left: 1.2rem;
}

.category-tree {
    display: grid;
    gap: 0.85rem;
}

.category-tree h3,
.category-tree h4 {
    margin: 0;
    line-height: 1.3;
}

.category-tree h3 {
    font-size: 1rem;
}

.category-tree h4 {
    color: var(--muted);
    font-size: 0.92rem;
}

.category-tree ul {
    margin: 0.25rem 0 0.7rem;
    padding-left: 1.2rem;
}

.page-index a[aria-current="page"] {
    color: var(--ink);
    font-weight: 700;
}

.page-list {
    display: grid;
    gap: 0.7rem;
}

.category-index {
    display: grid;
    gap: 1.4rem;
}

.category-group {
    display: grid;
    gap: 0.85rem;
}

.category-group h2,
.subcategory-group h3 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 500;
    line-height: 1.25;
}

.category-group h2 {
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--line);
    font-size: 1.45rem;
}

.subcategory-group {
    display: grid;
    gap: 0.65rem;
    padding-left: clamp(0.6rem, 2vw, 1rem);
    border-left: 3px solid var(--line);
}

.subcategory-group h3 {
    color: var(--muted);
    font-size: 1.05rem;
}

.page-list-item {
    display: grid;
    gap: 0.15rem;
    padding: 0.85rem 1rem;
    background: var(--surface-soft);
    border: 1px solid var(--line);
    text-decoration: none;
}

.page-list-item span {
    color: var(--ink);
    font-weight: 700;
}

.page-list-item small {
    color: var(--muted);
}

.notes-shell,
.note-detail,
.note-thread,
.page-notes {
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.notes-shell,
.note-detail {
    padding: clamp(1.2rem, 3vw, 2.5rem);
}

.notes-header {
    margin-bottom: 1.4rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
}

.notes-header p,
.notes-header time,
.note-card-header,
.thread-label,
.page-notes time {
    color: var(--muted);
    font-size: 0.92rem;
}

.notes-header p {
    display: flex;
    gap: 0.7rem;
    margin: 0 0 0.4rem;
    flex-wrap: wrap;
}

.notes-header h1,
.note-card h2,
.note-thread h2,
.page-notes h2 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 500;
    line-height: 1.2;
}

.notes-wall,
.page-notes-list {
    display: grid;
    gap: 1.15rem;
}

.note-card,
.page-notes article,
.thread-item {
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}

.note-card:first-child,
.thread-item:first-of-type,
.page-notes article:first-child {
    padding-top: 0;
    border-top: 0;
}

.note-card-header {
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.note-card h2,
.page-notes h3,
.thread-item h3 {
    margin: 0.2rem 0 0.35rem;
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 500;
    line-height: 1.25;
}

.note-card p,
.thread-item p,
.page-notes p {
    margin: 0.35rem 0 0;
}

.note-context {
    color: var(--muted);
    font-size: 0.94rem;
}

.note-replies-preview {
    display: flex;
    gap: 0.7rem;
    margin-top: 0.7rem;
    flex-wrap: wrap;
    font-size: 0.94rem;
}

.note-body {
    max-width: 72ch;
    font-size: 1.06rem;
}

.note-thread,
.page-notes {
    margin-top: 1rem;
    padding: 1.2rem;
}

.note-thread h2,
.page-notes header {
    margin-bottom: 0.85rem;
}

.page-notes header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid var(--line);
    padding-bottom: 0.7rem;
}

.page-notes h2 {
    font-size: 1.15rem;
}

.thread-item[aria-current="true"] {
    border-left: 3px solid var(--accent);
    padding-left: 0.8rem;
}

.admin-panel {
    padding: clamp(1rem, 3vw, 2rem);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
}

.admin-header p {
    margin: 0.25rem 0 0;
    color: var(--muted);
}

.admin-actions {
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.6rem;
    padding: 0.55rem 0.9rem;
    border: 1px solid transparent;
    border-radius: 6px;
    font: inherit;
    text-decoration: none;
    cursor: pointer;
}

.primary-button {
    background: var(--accent);
    color: #fff;
}

.secondary-button {
    background: var(--surface-soft);
    border-color: var(--line);
    color: var(--ink);
}

.alert {
    margin: 1rem 0;
    padding: 0.85rem 1rem;
    border-radius: 6px;
    border: 1px solid;
}

.alert p {
    margin: 0;
}

.alert p + p {
    margin-top: 0.35rem;
}

.alert.error {
    color: var(--danger);
    background: #fff5f3;
    border-color: #efb5ad;
}

.alert.success {
    color: var(--success);
    background: #f2fbf4;
    border-color: #b6dfc0;
}

.table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    min-width: 940px;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    border-bottom: 1px solid var(--line);
    padding: 0.8rem;
    text-align: left;
    vertical-align: top;
}

.admin-table th {
    background: var(--surface-soft);
}

.table-meta {
    display: block;
    color: var(--muted);
}

.category-table {
    min-width: 820px;
}

.subcategory-name {
    display: inline-block;
    padding-left: 1.1rem;
    color: var(--muted);
}

.subcategory-name::before {
    content: "-> ";
}

.row-actions {
    display: flex;
    gap: 0.65rem;
    align-items: center;
    flex-wrap: wrap;
}

.row-actions form {
    margin: 0;
}

.row-actions button {
    padding: 0;
    background: none;
    border: 0;
    color: var(--danger);
    cursor: pointer;
    font: inherit;
}

.admin-form {
    display: grid;
    gap: 1rem;
}

.admin-form.compact {
    width: min(420px, 100%);
    margin: 8vh auto;
    padding: clamp(1.2rem, 4vw, 2rem);
}

.admin-form label {
    display: grid;
    gap: 0.35rem;
    font-weight: 700;
}

.admin-form input,
.admin-form select,
.admin-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 0.65rem 0.75rem;
    font: inherit;
    background: #fff;
    color: var(--ink);
}

.admin-form input:focus,
.admin-form select:focus,
.admin-form textarea:focus {
    border-color: var(--accent);
    outline: 2px solid rgba(15, 118, 110, 0.16);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.form-grid.three-columns {
    grid-template-columns: 1fr 1fr minmax(7rem, 0.45fr);
}

.code-area {
    min-height: 28rem;
    font-family: Consolas, "Courier New", monospace;
}

.compact-code-area {
    min-height: 15rem;
}

.file-help {
    color: var(--muted);
    font-weight: 400;
}

.current-image {
    max-width: 240px;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.form-actions {
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.empty-state {
    padding: clamp(2rem, 6vw, 4rem);
    text-align: center;
}

.empty-state p {
    color: var(--muted);
}

@media (max-width: 760px) {
    .site-header,
    .admin-header {
        align-items: stretch;
        flex-direction: column;
    }

    .page-shell {
        width: min(100% - 1rem, 1120px);
    }

    .wiki-article,
    .admin-panel {
        padding: 1rem;
    }

    .infobox {
        float: none;
        margin: 1rem 0;
        width: 100%;
    }

    .page-index > ul {
        columns: 1;
    }

    .page-notes header {
        align-items: flex-start;
        flex-direction: column;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-grid.three-columns {
        grid-template-columns: 1fr;
    }
}