:root {
  --bg: #f7f5ef;
  --card: #fffdf8;
  --ink: #1d1b16;
  --ink2: #5c574c;
  --ink3: #8f887a;
  --line: #e6e1d4;
  --accent: #e25d0e;
  --accent-soft: #fbe7da;
  --chip: #efebe0;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15140f;
    --card: #1d1c16;
    --ink: #ece7da;
    --ink2: #b3ac9c;
    --ink3: #7d7768;
    --line: #2f2d25;
    --accent: #ff7a2e;
    --accent-soft: #3a2416;
    --chip: #28261f;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.65 var(--sans); }
a { color: inherit; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }

header { padding: 48px 0 20px; }
.brand { display: flex; align-items: center; gap: 10px; font: 600 15px var(--mono); letter-spacing: .02em; }
.brand .mark { width: 22px; height: 22px; border-radius: 5px; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 13px; }
.brand .sister { margin-left: auto; font: 13px var(--sans); color: var(--ink3); text-decoration: none; }
.brand .sister:hover { color: var(--accent); }
h1 { font: 700 34px/1.25 var(--serif); margin: 22px 0 10px; letter-spacing: .01em; text-wrap: balance; }
.lede { color: var(--ink2); margin: 0; max-width: 640px; text-wrap: pretty; }
.stats { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 18px; color: var(--ink3); font-size: 13px; }
.stats b { color: var(--ink); font: 600 17px var(--mono); margin-right: 4px; }

.controls { position: sticky; top: 0; z-index: 5; background: var(--bg); padding: 12px 0 10px; border-bottom: 1px solid var(--line); }
.row { display: flex; gap: 8px; align-items: center; }
.search { flex: 1; min-width: 0; height: 38px; border: 1px solid var(--line); border-radius: 9px; background: var(--card); color: var(--ink); padding: 0 12px; font: inherit; }
.search:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
select { height: 38px; border: 1px solid var(--line); border-radius: 9px; background: var(--card); color: var(--ink); padding: 0 8px; font: inherit; }
.chips { display: flex; gap: 6px; overflow-x: auto; padding: 10px 0 2px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; border: 0; border-radius: 999px; background: var(--chip); color: var(--ink2); padding: 4px 11px; font: 13px var(--sans); cursor: pointer; white-space: nowrap; }
.chip small { color: var(--ink3); margin-left: 3px; font-family: var(--mono); }
.chip.on { background: var(--ink); color: var(--bg); }
.chip.on small { color: inherit; opacity: .7; }
.toggle { display: flex; align-items: center; gap: 5px; font-size: 13px; color: var(--ink2); white-space: nowrap; cursor: pointer; }

.count { color: var(--ink3); font-size: 13px; margin: 14px 0 4px; }
ol.list { list-style: none; margin: 0; padding: 0; }
.item { display: grid; grid-template-columns: 34px 1fr; gap: 4px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.rank { font: 13px var(--mono); color: var(--ink3); padding-top: 3px; }
.zh { font: 600 18px/1.45 var(--serif); margin: 0; text-wrap: pretty; }
.zh a { text-decoration: none; }
.zh a:hover { color: var(--accent); }
.en { color: var(--ink3); font-size: 13.5px; margin: 2px 0 6px; overflow-wrap: anywhere; }
.meta { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12.5px; color: var(--ink3); align-items: center; }
.meta .score { color: var(--accent); font-family: var(--mono); }
.meta .num { font-family: var(--mono); }
.meta .cat { background: var(--chip); color: var(--ink2); border-radius: 5px; padding: 0 7px; }
.meta .star { color: var(--accent); }
.more { border: 0; background: none; color: var(--ink2); font: 12.5px var(--sans); padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.more:hover { color: var(--accent); }

.note { margin-top: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 11px; padding: 14px 16px; }
.note p { margin: 0 0 8px; }
.note .why { color: var(--ink2); }
.note .why::before { content: "●"; color: var(--accent); font-size: 9px; vertical-align: 2px; margin-right: 7px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 6px; }
.tags span { font-size: 12px; color: var(--ink2); background: var(--chip); border-radius: 5px; padding: 0 7px; }
.cm { border-top: 1px dashed var(--line); padding-top: 10px; margin-top: 10px; }
.cm .who { font-size: 12.5px; color: var(--ink3); margin-bottom: 3px; }
.cm .who b { color: var(--ink2); font-weight: 600; }
.cm .pt { font-weight: 600; margin-bottom: 4px; }
.cm .zhc { white-space: pre-wrap; margin: 0; color: var(--ink); font-size: 14px; }
.cm details { margin-top: 4px; }
.cm summary { cursor: pointer; color: var(--ink3); font-size: 12.5px; }
.cm .orig { white-space: pre-wrap; color: var(--ink2); font-size: 13.5px; margin: 6px 0 0; overflow-wrap: anywhere; }
.threads { display: flex; flex-wrap: wrap; gap: 6px 12px; margin-top: 10px; font-size: 12.5px; }
.threads a { color: var(--ink2); text-underline-offset: 3px; }
.threads a:hover { color: var(--accent); }

/* HackerURLs timeline: one dot per submission on a 2006 → now axis */
.tl { position: relative; height: 22px; margin: 8px 0 4px; }
.tl::before { content: ""; position: absolute; left: 0; right: 0; top: 11px; height: 1px; background: var(--line); }
.tl i { position: absolute; top: 11px; transform: translate(-50%, -50%); border-radius: 50%; background: var(--ink3); opacity: .55; }
.tl i.fp { background: var(--accent); opacity: .9; }
.tl span { position: absolute; top: 14px; font: 10px var(--mono); color: var(--ink3); transform: translateX(-50%); }

.loadmore { display: block; margin: 22px auto; border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 9px; padding: 9px 22px; font: inherit; cursor: pointer; }
.empty { color: var(--ink3); padding: 40px 0; text-align: center; }
footer { color: var(--ink3); font-size: 12.5px; padding: 30px 0 50px; }
footer a { color: var(--ink2); }

@media (max-width: 560px) {
  header { padding-top: 28px; }
  h1 { font-size: 26px; }
  .item { grid-template-columns: 26px 1fr; }
  .zh { font-size: 16.5px; }
  .row { flex-wrap: wrap; }
  .search { flex-basis: 100%; }
}

/* Qiaomu site chrome */
footer .links { display: flex; gap: 16px; margin-top: 10px; }
.fab { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 10; }
.fab button { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); color: var(--ink2); display: grid; place-items: center; cursor: pointer; box-shadow: 0 2px 8px rgb(0 0 0 / .08); }
.fab button:hover, .fab button:focus-visible { color: var(--accent); outline: none; border-color: var(--accent); }
.fab svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
dialog.qr { border: 1px solid var(--line); border-radius: 14px; background: var(--card); color: var(--ink); padding: 22px 24px 18px; text-align: center; max-width: calc(100vw - 32px); }
dialog.qr::backdrop { background: rgb(0 0 0 / .45); }
dialog.qr h2 { font: 600 18px var(--serif); margin: 0 0 12px; }
dialog.qr img { display: block; margin: 0 auto; width: 240px; height: 240px; max-width: 100%; object-fit: contain; border-radius: 8px; background: #fff; }
dialog.qr p { margin: 10px 0 0; font-size: 13px; color: var(--ink2); }
dialog.qr .links { display: flex; gap: 14px; justify-content: center; }
dialog.qr .x { position: absolute; top: 8px; right: 10px; border: 0; background: none; font-size: 22px; line-height: 1; color: var(--ink3); cursor: pointer; }