:root {
    --bg: #fbfbfa;
    --surface: #ffffff;
    --text: #1c1c1a;
    --muted: #6b6b66;
    --border: #e3e3df;
    --accent: #3a6ea5;
    --accent-soft: #eef3f9;
    --danger: #a33a3a;
    --ok-bg: #e9f3ea;
    --ok-text: #2c5c33;
    --err-bg: #fbecec;
    --radius: 10px;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #16171a;
        --surface: #1e2024;
        --text: #e6e6e3;
        --muted: #9a9a94;
        --border: #32343a;
        --accent: #7aa8d8;
        --accent-soft: #232a33;
        --danger: #d98b8b;
        --ok-bg: #1f2e22;
        --ok-text: #9ed0a8;
        --err-bg: #332222;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 820px; margin: 0 auto; padding: 0 20px; }
.wrap-wide { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.site-head {
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 10;
}
.site-head .row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 60px;
    flex-wrap: wrap;
}
.brand { font-weight: 600; font-size: 17px; color: var(--text); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.head-links { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.head-links .muted { color: var(--muted); }

main { padding: 36px 0 64px; }

h1 { font-size: 28px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 32px 0 12px; letter-spacing: -0.01em; }
.lede { color: var(--muted); margin: 0 0 28px; }

.section-block { margin-bottom: 34px; }
.section-block h2 { margin-top: 0; display: flex; align-items: center; gap: 8px; }
.section-block > .desc { color: var(--muted); font-size: 15px; margin: -6px 0 12px; }

.nav-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--border); }
.nav-list li { border-bottom: 1px solid var(--border); }
.nav-list a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 11px 4px;
    color: var(--text);
}
.nav-list a:hover { background: var(--accent-soft); text-decoration: none; }
.nav-list .t { font-weight: 500; }
.nav-list .s { color: var(--muted); font-size: 14px; }

.badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 2px 7px;
    border-radius: 999px;
    border: 1px solid var(--border);
    color: var(--muted);
    white-space: nowrap;
}
.badge.lock { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.badge.draft { background: var(--err-bg); color: var(--danger); border-color: transparent; }

.empty {
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    color: var(--muted);
}

.content { overflow-wrap: break-word; }
.content img, .content video, .content iframe { max-width: 100%; height: auto; }
.content table { display: block; overflow-x: auto; border-collapse: collapse; max-width: 100%; }
.content table td, .content table th { border: 1px solid var(--border); padding: 6px 10px; }
.content pre { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 12px; font-family: var(--mono); font-size: 14px; }
.content code { font-family: var(--mono); font-size: 0.92em; }
.content blockquote { margin: 0 0 1em; padding-left: 16px; border-left: 3px solid var(--border); color: var(--muted); }

/* Frame for a page uploaded as a whole HTML document. White by default because
   that is what the document assumed when it was authored — the site theme must
   not repaint it. Height is set by script once the document has loaded. */
.doc-frame {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
}

.doc-frame iframe {
    display: block;
    width: 100%;
    height: 70vh;
    border: 0;
}

.doc-link { font-size: 14px; margin: 10px 0 0; }

.page-meta { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
.back { font-size: 14px; display: inline-block; margin-bottom: 18px; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
}

.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 500; font-size: 14px; margin-bottom: 6px; }
.field .hint { color: var(--muted); font-size: 13px; margin-top: 5px; }

input[type=text], input[type=email], input[type=password], input[type=file], select, textarea {
    width: 100%;
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font: inherit;
    font-size: 15px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

.check { display: flex; align-items: flex-start; gap: 9px; margin-bottom: 12px; }
.check input { margin: 4px 0 0; }
.check label { font-weight: 400; margin: 0; }
.check .hint { margin-top: 2px; }

.btn {
    display: inline-block;
    padding: 9px 16px;
    border-radius: 8px;
    border: 1px solid var(--accent);
    background: var(--accent);
    color: #fff;
    font: inherit;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { background: var(--accent-soft); filter: none; }
.btn.danger { background: transparent; color: var(--danger); border-color: var(--border); }
.btn.danger:hover { background: var(--err-bg); filter: none; }
.btn.small { padding: 5px 11px; font-size: 13px; }

.actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 24px; }

.notice { padding: 11px 15px; border-radius: 8px; margin-bottom: 22px; font-size: 15px; }
.notice.ok { background: var(--ok-bg); color: var(--ok-text); }
.notice.err { background: var(--err-bg); color: var(--danger); }
.notice ul { margin: 6px 0 0; padding-left: 18px; }

.err-text { color: var(--danger); font-size: 13px; margin-top: 5px; }

table.grid { width: 100%; border-collapse: collapse; font-size: 15px; }
table.grid th {
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
    font-weight: 600;
    padding: 0 10px 8px;
    border-bottom: 1px solid var(--border);
}
table.grid td { padding: 11px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.grid tr:hover td { background: var(--accent-soft); }
table.grid td.right, table.grid th.right { text-align: right; white-space: nowrap; }
.table-scroll { overflow-x: auto; }

.admin-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.admin-nav a {
    padding: 6px 12px;
    border-radius: 7px;
    font-size: 14px;
    color: var(--muted);
}
.admin-nav a:hover { background: var(--accent-soft); text-decoration: none; }
.admin-nav a.on { background: var(--accent-soft); color: var(--accent); font-weight: 500; }

.head-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.head-bar h1 { margin: 0; font-size: 23px; }

.drag { cursor: grab; color: var(--muted); user-select: none; padding: 0 4px; }
.drag:active { cursor: grabbing; }
tr.dragging { opacity: 0.4; }

.CodeMirror {
    height: 460px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: var(--mono);
    font-size: 13.5px;
    line-height: 1.55;
}

/* CodeMirror ships a light theme only; repaint it for dark mode. */
@media (prefers-color-scheme: dark) {
    .CodeMirror { background: #1a1c1f; color: #e6e6e3; }
    .CodeMirror-gutters { background: #16171a; border-right-color: var(--border); }
    .CodeMirror-linenumber { color: #5e5e59; }
    .CodeMirror-cursor { border-left-color: #e6e6e3; }
    .CodeMirror-selected { background: #333941 !important; }
    .CodeMirror-focused .CodeMirror-selected { background: #3d444e !important; }
    .cm-s-default .cm-tag { color: #7aa8d8; }
    .cm-s-default .cm-bracket { color: #9a9a94; }
    .cm-s-default .cm-attribute { color: #cc9b6d; }
    .cm-s-default .cm-string { color: #9ed0a8; }
    .cm-s-default .cm-comment { color: #6b6b66; font-style: italic; }
    .cm-s-default .cm-keyword { color: #c08ac4; }
    .cm-s-default .cm-number { color: #d69b6b; }
    .cm-s-default .cm-property { color: #7aa8d8; }
}

.inline-form { display: inline; }

.preview-pane {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    padding: 18px;
    height: 460px;
    overflow: auto;
}

.split { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 1000px) {
    .split.on { grid-template-columns: 1fr 1fr; }
}

.tabs { display: flex; gap: 4px; margin-bottom: 10px; }
.tabs button {
    padding: 6px 13px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted);
    border-radius: 7px;
    font: inherit;
    font-size: 14px;
    cursor: pointer;
}
.tabs button.on { background: var(--accent-soft); color: var(--accent); border-color: transparent; font-weight: 500; }

footer.site-foot {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    color: var(--muted);
    font-size: 13px;
}