:root {
  --bg: #0f172a; --panel: #1e293b; --line: #334155; --text: #e2e8f0;
  --dim: #94a3b8; --accent: #3b82f6; --ok: #22c55e; --bad: #ef4444;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.75 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: #60a5fa; text-decoration: none; } a:hover { text-decoration: underline; }
.nav { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 18px;
  padding: 12px 20px; padding-top: max(12px, env(safe-area-inset-top));
  background: rgba(15, 23, 42, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav .brand { font-weight: 700; color: var(--text); margin-right: auto; }
.nav a { color: var(--dim); } .nav a.active { color: var(--text); font-weight: 600; }
.wrap { max-width: 820px; margin: 0 auto; padding: 28px 20px 60px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.list { display: flex; flex-direction: column; gap: 14px; }
.post-item h3 { margin: 0 0 4px; font-size: 19px; }
.meta { color: var(--dim); font-size: 13px; }
.muted { color: var(--dim); }
button, .btn { background: var(--panel); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 14px; font: inherit; font-size: 14px; cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); }
button.danger { color: var(--bad); }
button:disabled { opacity: .5; cursor: default; }
input, textarea, select { width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px; font: inherit; font-size: 15px; }
textarea { resize: vertical; }
label { display: block; font-size: 14px; color: var(--dim); margin: 12px 0 4px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.err { color: var(--bad); font-size: 14px; }
.hp { position: absolute; left: -9999px; }   /* honeypot field, hidden from humans */

/* Rendered Markdown */
.md::after { content: ""; display: table; clear: both; }
.md h1, .md h2, .md h3, .md hr { line-height: 1.35; margin: 1.4em 0 .5em; clear: both; }
.md p { margin: .8em 0; }
.md pre { background: #0b1220; border: 1px solid var(--line); border-radius: 8px; padding: 12px; overflow-x: auto; clear: both; }
.md code { font-family: Consolas, "SF Mono", monospace; font-size: .92em; }
.md :not(pre) > code { background: #0b1220; padding: 1px 5px; border-radius: 4px; }
.md blockquote { margin: 1em 0; padding: 2px 14px; border-left: 3px solid var(--accent); color: var(--dim); }
.md img { max-width: 100%; border-radius: 8px; display: block; }
.md ul, .md ol { padding-left: 1.4em; }

/* Image Layout & Positioning (.md-fig & .md-gallery) */
.md-fig { margin: 1.1em 0; width: var(--img-w, 100%); max-width: 100%; }
.md-fig img { width: 100%; height: auto; border-radius: 8px; border: 1px solid rgba(255,255,255,.06); }
.md-fig figcaption { font-size: 13px; color: var(--dim); text-align: center; margin-top: 6px; line-height: 1.4; }
.md-fig.pos-center { margin-left: auto; margin-right: auto; clear: both; }
.md-fig.pos-left { margin-left: 0; margin-right: auto; clear: both; }
.md-fig.pos-right { margin-left: auto; margin-right: 0; clear: both; }
.md-fig.pos-float-left { float: left; margin: .35em 1.25em .9em 0; width: var(--img-w, 45%); }
.md-fig.pos-float-right { float: right; margin: .35em 0 .9em 1.25em; width: var(--img-w, 45%); }
.md-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 1.1em 0; clear: both; align-items: start; }
.md-gallery .md-fig { width: 100% !important; margin: 0; float: none !important; }
@media (max-width: 600px) {
  .md-fig.pos-float-left, .md-fig.pos-float-right { float: none; width: 100%; margin: 1em 0; }
}

/* Admin Image Layout Controller */
.img-ctrl-list { display: flex; flex-direction: column; gap: 10px; margin-top: 10px; }
.img-ctrl-item { display: flex; gap: 12px; align-items: flex-start; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.img-ctrl-thumb { width: 76px; height: 76px; object-fit: cover; border-radius: 6px; border: 1px solid var(--line); flex-shrink: 0; background: #0b1220; }
.img-ctrl-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 7px; }
.img-ctrl-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.img-ctrl-row .chip { padding: 3px 9px; font-size: 12px; border-radius: 6px; }
.img-ctrl-row .chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.img-ctrl-cap { padding: 5px 8px; font-size: 13px; max-width: 260px; }

.comment { border-top: 1px solid var(--line); padding: 12px 0; }
.comment .body { white-space: pre-wrap; word-break: break-word; }