:root {
  --bg: #ffffff;
  --fg: #1a1d24;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #0f172a;
  --card: #ffffff;
  --chip: #f3f4f6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0e14;
    --fg: #e6e8ec;
    --muted: #9aa3af;
    --line: #232835;
    --accent: #7dd3fc;
    --card: #121722;
    --chip: #1b2130;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: var(--bg); z-index: 10;
}
.brand { font-weight: 700; color: var(--fg); }
.site-header nav a { margin-left: 14px; color: var(--muted); font-size: 14px; }
main { max-width: 760px; margin: 0 auto; padding: 18px; }
h1 { font-size: 26px; line-height: 1.3; margin: 8px 0 6px; }
h2 { font-size: 18px; margin: 28px 0 10px; }
h3 { font-size: 17px; margin: 0 0 4px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; margin: 0 0 12px;
}
.meta { color: var(--muted); font-size: 13px; margin: 0 0 6px; }
.empty { color: var(--muted); }
.chip {
  display: inline-block; padding: 5px 11px; border-radius: 999px;
  background: var(--chip); color: var(--muted); font-size: 13px;
}
.chip.active { background: var(--accent); color: #fff; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.paste, .search { display: flex; gap: 8px; margin: 6px 0 4px; }
.paste input, .search input {
  flex: 1; min-height: 44px; padding: 10px 12px; font-size: 16px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--fg);
}
button {
  min-height: 44px; padding: 0 18px; font-size: 15px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--accent); color: #fff; cursor: pointer;
}
.content pre {
  overflow-x: auto; padding: 12px 14px; border-radius: 10px;
  background: var(--chip); font-size: 14px;
}
.content code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.content blockquote {
  margin: 12px 0; padding-left: 14px; border-left: 3px solid var(--line); color: var(--muted);
}
.content img { max-width: 100%; height: auto; }
.site-footer {
  max-width: 760px; margin: 40px auto 24px; padding: 0 18px;
  color: var(--muted); font-size: 13px; border-top: 1px solid var(--line);
}
.admin-row {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 0; border-bottom: 1px solid var(--line);
}
.admin-row .grow { flex: 1; min-width: 180px; }
textarea {
  width: 100%; min-height: 260px; padding: 12px; font-size: 15px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
label { display: block; margin: 10px 0 4px; color: var(--muted); font-size: 14px; }