/* ==========================================================================
   xopen — the index ledger
   Paper + ink. One semantic colour (--live) for link-check status only.
   Newsreader (self-hosted latin subset) for names and headlines; system type
   for everything else. Restyles the site's existing semantic classes, so
   sub-page markup stays as it was.
   ========================================================================== */

@font-face {
  font-family: "Newsreader";
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("/assets/fonts/newsreader-latin-roman.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Newsreader";
  font-style: italic;
  font-weight: 300 700;
  font-display: swap;
  src: url("/assets/fonts/newsreader-latin-italic.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --paper: #f3f0e8;
  --paper-2: #e9e5d9;
  --ink: #16140f;
  --ink-2: #47433b;
  --muted: #6a6458; /* 5.2:1 on paper, 4.7:1 on the hover tint — small mono labels need AA */
  --rule: rgba(22, 20, 15, 0.22);
  --rule-2: rgba(22, 20, 15, 0.1);
  --live: #1d7a4c;
  --grain: 0.06;

  --serif: "Newsreader", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "Hiragino Mincho ProN", "Microsoft YaHei", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --max: 1240px;
  --gutter: 28px;
  /* idx | name | what | category | licence | stars | last push | dot | toggle */
  --cols: 44px minmax(180px, 236px) minmax(0, 1fr) 100px 92px 52px 74px 10px 20px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131210;
    --paper-2: #1d1b17;
    --ink: #ebe6da;
    --ink-2: #bdb7a9;
    --muted: #968f80;
    --rule: rgba(235, 230, 218, 0.26);
    --rule-2: rgba(235, 230, 218, 0.1);
    --live: #59c08a;
    --grain: 0.035;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--paper); }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
/* 纸张颗粒：一层固定的噪点，不随滚动重绘 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) { body::before { filter: invert(1); } }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
img { max-width: 100%; }
button { font: inherit; color: inherit; }
::selection { background: var(--ink); color: var(--paper); }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 400; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
/* 子页面里用内联 max-width 收窄的版心：左缘与主版心对齐，不再居中漂着 */
.wrap[style*="max-width"] { margin-left: max(0px, calc(50% - var(--max) / 2)); margin-right: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link { position: absolute; left: -999px; top: 12px; z-index: 200; background: var(--ink); color: var(--paper); padding: 8px 12px; font: 12px/1 var(--mono); }
.skip-link:focus { left: 12px; }

/* The motif: "Open" recedes, what follows it carries the weight. */
.o { font-family: var(--serif); }
.o i { font-style: italic; font-weight: 300; color: var(--muted); }
.o b { font-weight: 600; }

/* ============================ Navigation ============================ */
.nav { border-bottom: 1px solid var(--ink); }
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--gutter) 14px;
  display: flex;
  align-items: baseline;
  gap: 36px;
}
.nav-brand { font: 600 27px/1 var(--serif); letter-spacing: -0.01em; text-decoration: none; }
.nav-brand b { font-weight: 600; }
.nav-brand .word { font-style: italic; font-weight: 300; color: var(--muted); }
.nav-links { display: flex; gap: 26px; }
.nav-links a, .nav-lang a, .nav-cta {
  font: 12px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  white-space: nowrap;
}
.nav-links a:hover, .nav-lang a:hover, .nav-cta:hover { color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-underline-offset: 0.5em; text-decoration-thickness: 2px; }
.nav-side { margin-left: auto; display: flex; align-items: baseline; gap: 22px; }
.nav-lang { display: inline-flex; gap: 12px; }
.nav-lang a[aria-current="true"] { color: var(--ink); }
.nav-cta { color: var(--ink); display: inline-flex; align-items: center; gap: 5px; }
.nav-cta svg, .button svg { width: 12px; height: 12px; }

/* ============================ Buttons ============================ */
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px 12px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font: 12px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.button:hover { background: transparent; color: var(--ink); }
.button.secondary { background: transparent; color: var(--ink); }
.button.secondary:hover { background: var(--ink); color: var(--paper); }
.ghost, .card-link {
  font: 12.5px/1.4 var(--mono);
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}
.card-link::after { content: " →"; }
.ghost:hover, .card-link:hover { text-decoration-thickness: 2px; }

/* ============================ Index masthead ============================ */
.mast {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 64px;
  align-items: end;
  padding: 84px 0 56px;
}
.mast h1 {
  font-size: clamp(42px, 6.6vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.mast h1 .o i { color: inherit; }
.mast h1 .sub { display: block; margin-top: 0.14em; font-weight: 300; font-style: italic; color: var(--muted); }
.mast .lead { max-width: 54ch; margin: 28px 0 0; font-size: 17px; color: var(--ink-2); }
.facts { margin: 0; font: 12.5px/1 var(--mono); border-top: 3px double var(--ink); padding-top: 14px; }
.facts div { display: flex; align-items: baseline; gap: 8px; padding: 6px 0; }
.facts dt { color: var(--muted); letter-spacing: 0.04em; }
.facts .ldr { flex: 1; border-bottom: 1px dotted var(--rule); transform: translateY(-3px); }
.facts dd { margin: 0; font-variant-numeric: tabular-nums; }

/* ============================ Project page ============================ */
.mast.proj { padding: 64px 0 8px; }
.mast.proj .eyebrow a { text-decoration: none; }
.mast.proj .eyebrow a:hover { color: var(--ink); text-decoration: underline; }
.mast.proj h1 { font-size: clamp(46px, 7.4vw, 104px); }
.mast.proj h1 .o i { color: var(--muted); }
.mast.proj h1 img {
  width: 0.62em; height: 0.62em;
  margin-right: 0.24em;
  vertical-align: -0.03em;
  border-radius: 0.12em;
  object-fit: contain;
}
.mast.proj h1 img.on-dark { background: #16140f; padding: 0.07em; }
.mast.proj h1 .t { vertical-align: 0.9em; margin-left: 14px; font-size: 11px; }
.proj-tags { margin: 18px 0 0; font: 12.5px/1.6 var(--mono); color: var(--muted); }
.proj-tags span { margin-right: 14px; }
.mast.proj .action-row { margin-top: 30px; }
@media (prefers-color-scheme: dark) {
  .mast.proj h1 img:not(.on-dark) { background: #f3f0e8; padding: 0.05em; }
  .mast.proj h1 img.on-dark { background: #2a2722; }
}

/* ============================ Find + controls ============================ */
.find { display: flex; align-items: baseline; gap: 18px; border-bottom: 2px solid var(--ink); padding-bottom: 6px; }
.find:focus-within { box-shadow: 0 2px 0 var(--ink); }
.find input {
  flex: 1; min-width: 0; padding: 0; border: 0; outline: 0; border-radius: 0;
  background: none; color: var(--ink);
  font: italic 300 32px/1.3 var(--serif);
  -webkit-appearance: none; appearance: none;
}
.find input::placeholder { color: var(--muted); opacity: 1; }
.find input::-webkit-search-cancel-button { -webkit-appearance: none; }
.count { font: 12.5px/1 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.count b { color: var(--ink); font-weight: 400; }
kbd { font: 12px/1 var(--mono); color: var(--muted); border: 1px solid var(--rule); border-radius: 4px; padding: 4px 7px; }

.controls { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 18px 0 30px; }
.tabs, .sorts { display: flex; flex-wrap: wrap; gap: 6px 22px; align-items: baseline; }
.controls button, .sorts span {
  background: none; border: 0; padding: 0; cursor: pointer;
  font: 12px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
}
.sorts span { cursor: default; opacity: 0.7; }
.controls button:hover { color: var(--ink); }
.controls button[aria-pressed="true"] { color: var(--ink); box-shadow: 0 5px 0 -3px var(--ink); }
.controls sup { font-size: 9.5px; margin-left: 3px; letter-spacing: 0; }

/* ============================ The ledger ============================ */
.lhead, .row { display: grid; grid-template-columns: var(--cols); column-gap: 22px; align-items: baseline; }
.lhead {
  position: sticky; top: 0; z-index: 3;
  background: var(--paper);
  padding: 9px 0 8px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font: 10.5px/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.lhead .c4, .lhead .c5 { text-align: right; }

.ledger { margin: 0; padding: 0; list-style: none; counter-reset: n; }
.row {
  position: relative;
  padding: 13px 14px;
  margin: 0 -14px;
  border-top: 1px solid var(--rule-2);
  counter-increment: n;
  scroll-margin-top: 96px; /* 深链落点让开吸顶表头 */
}
.row[hidden] { display: none; }
.row:hover, .row.open { background: var(--paper-2); }
.ledger[data-sort="az"] .row.first { border-top-color: transparent; }
.ledger[data-sort="az"] .row.first::before {
  content: ""; position: absolute; left: 14px; right: 14px; top: -1px;
  border-top: 1px solid var(--rule);
}
.idx { font: 11.5px/1 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.ledger:not([data-sort="az"]) .idx::before { content: counter(n, decimal-leading-zero); }
.ledger[data-sort="az"] .row.first .idx::before {
  content: attr(data-l);
  font: italic 300 34px/0.6 var(--serif);
  color: var(--ink);
}
.row .name { font-size: 21px; line-height: 1.2; letter-spacing: -0.005em; }
.row .name img {
  width: 22px; height: 22px;
  margin-right: 11px;
  vertical-align: -4px;
  border-radius: 5px;
  object-fit: contain;
}
/* 为深色底设计的白色 logo：两种模式下都给一块墨色底 */
.row .name img.on-dark { background: #16140f; padding: 3px; }
@media (prefers-color-scheme: dark) {
  .row .name img:not(.on-dark) { background: #f3f0e8; padding: 2px; }
  .row .name img.on-dark { background: #2a2722; }
}
.row .name a { text-decoration: none; }
.row .name a:hover .o b, .row .name a:focus-visible .o b { text-decoration: underline; text-decoration-thickness: 1px; }
.t {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 5px 1px;
  vertical-align: 3px;
  border: 1px solid var(--rule);
  font: 9.5px/1.2 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.t-new { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.row .desc {
  margin: 0;
  font-size: 14.5px; line-height: 1.5; color: var(--ink-2);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.row.open .desc { display: block; color: var(--ink); }
.meta { display: contents; font: 12.5px/1.3 var(--mono); color: var(--ink-2); }
.meta span { font: inherit; font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.meta .stars, .meta .act { text-align: right; }
.meta .act { color: var(--muted); }
.row .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--live); align-self: start; margin-top: 9px; }
.row .dot.warn { background: none; box-shadow: inset 0 0 0 1.5px var(--muted); }
.tog { background: none; border: 0; padding: 0; cursor: pointer; font: 16px/1 var(--mono); color: var(--muted); text-align: center; }
.tog::after { content: ""; position: absolute; inset: 0; } /* 整行可点 */
.row .name a, .more { position: relative; z-index: 1; }
.tog:hover, .row:hover .tog { color: var(--ink); }
.more { grid-column: 3 / -1; padding: 12px 0 4px; font: 12.5px/1.6 var(--mono); color: var(--muted); }
.more[hidden] { display: none; }
.more p { margin: 0; }
.more .tags span { margin-right: 14px; }
.more .acts { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px 24px; color: var(--ink); }
.more .acts a, .more .acts button {
  background: none; border: 0; padding: 0; cursor: pointer; font: inherit;
  text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.2em;
}
.none { display: none; padding: 56px 0; font: italic 300 30px/1.3 var(--serif); color: var(--muted); }
.none.visible { display: block; }
.none .card-link { font: 400 0.6em/1.4 var(--mono); font-style: normal; }

/* ============================ Index: radar + alternatives ============================ */
.radar, .alts { margin-top: 96px; border-top: 3px double var(--ink); padding-top: 30px; }
.band { margin-top: 72px; border-top: 3px double var(--ink); padding-top: 30px; }
.band .badge-code { max-width: 860px; }
.page-hero + .radar { margin-top: 12px; }
.log { margin: 0; padding: 0; list-style: none; }
.log li { display: grid; grid-template-columns: 104px 84px minmax(0, 1fr) auto; column-gap: 22px; align-items: baseline; padding: 11px 0; border-top: 1px solid var(--rule-2); }
.log time, .log .ev, .log .note { font: 12.5px/1.4 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.log .ev { letter-spacing: 0.08em; text-transform: uppercase; }
.log .ev-added { color: var(--ink); }
.log .who { font-size: 20px; line-height: 1.2; }
.log .who a { text-decoration: none; }
.log .who a:hover .o b { text-decoration: underline; text-decoration-thickness: 1px; }
.shead { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px); gap: 40px; align-items: end; margin-bottom: 34px; }
.shead h2 { font-size: clamp(32px, 4vw, 52px); line-height: 1.02; letter-spacing: -0.02em; text-wrap: balance; }
.shead p { margin: 0; color: var(--ink-2); font-size: 15px; }
.radar ol { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 64px; }
.radar li { padding: 16px 0 18px; border-top: 1px solid var(--rule-2); scroll-margin-top: 24px; }
.radar h3 { font-size: 21px; line-height: 1.2; }
.radar h3 a { text-decoration: none; }
.radar h3 a:hover .o b { text-decoration: underline; text-decoration-thickness: 1px; }
.radar p { margin: 5px 0 0; font-size: 14.5px; color: var(--ink-2); }
.radar .rmeta { font: 12px/1.4 var(--mono); color: var(--muted); }
.radar .empty-note { grid-column: 1 / -1; color: var(--muted); }
.run { margin: 0; font: 400 clamp(22px, 2.6vw, 33px)/1.6 var(--serif); letter-spacing: -0.01em; }
.run a { text-decoration: none; white-space: nowrap; }
.run a:hover { text-decoration: underline; text-decoration-thickness: 1px; }
.run sup { font: 11px/1 var(--mono); color: var(--muted); margin-left: 2px; letter-spacing: 0; }
.run .sep { color: var(--rule); font-weight: 300; }

/* ============================ Sub-page hero ============================ */
.page-hero { padding: 72px 0 44px; }
.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  font: 12px/1 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow .dot { display: none; }
.page-hero h1 {
  max-width: 18ch;
  font-size: clamp(40px, 5.6vw, 76px);
  line-height: 1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.page-hero .lead, .lead { max-width: 60ch; margin: 24px 0 0; color: var(--ink-2); font-size: 17px; }
.search-shell { margin-top: 30px; display: flex; flex-wrap: wrap; align-items: center; gap: 16px 22px; }

/* ============================ Sections / panels ============================ */
.section { padding: 0 0 72px; }
.section-head { margin-bottom: 30px; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.04; letter-spacing: -0.02em; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 64px; }
.panel { border-top: 1px solid var(--ink); padding: 22px 0 30px; }
.panel h3 { margin: 0 0 10px; font-size: 25px; line-height: 1.15; letter-spacing: -0.01em; }
.panel p { margin: 0 0 12px; max-width: 68ch; color: var(--ink-2); }
.panel p:last-child { margin-bottom: 0; }
.panel ul, .panel ol { max-width: 68ch; color: var(--ink-2); padding-left: 1.2em; }
.directory-meta { margin: 14px 0 0; font: 12.5px/1.6 var(--mono); color: var(--muted); }
.chip-row { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 8px 0 0; }
.chip { font: 12px/1.5 var(--mono); color: var(--muted); }
.chip-warn { color: var(--ink); border-bottom: 1px dashed var(--ink); }
.chip-link { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
.status { font: 12.5px/1.5 var(--mono); color: var(--muted); }
.empty-note { color: var(--muted); }

/* ============================ Open alternatives ============================ */
.alt-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 64px; align-items: start; }
.alt-card { border-top: 3px double var(--ink); padding: 22px 0 44px; scroll-margin-top: 24px; }
.alt-head h2 { font-size: 36px; line-height: 1.05; letter-spacing: -0.02em; }
.alt-intent { margin: 6px 0 0; color: var(--muted); font-size: 15px; }
.alt-why { margin: 16px 0 0; padding-left: 14px; border-left: 2px solid var(--ink); color: var(--ink-2); font-size: 15px; }
.alt-why b { color: var(--ink); font-weight: 600; }
.alt-list { list-style: none; margin: 18px 0 0; padding: 0; }
.alt-row { padding: 13px 0 14px; border-top: 1px solid var(--rule-2); }
.alt-name { font: 600 21px/1.2 var(--serif); text-decoration: none; }
.alt-name:hover { text-decoration: underline; text-decoration-thickness: 1px; }
.alt-row p { margin: 4px 0 0; color: var(--ink-2); font-size: 14.5px; }
.alt-card > .card-link { display: inline-block; margin-top: 14px; }
.alt-cta { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.alt-cta h2 { font-size: clamp(28px, 3vw, 40px); letter-spacing: -0.02em; }
.alt-cta p { margin: 0; max-width: 62ch; color: var(--ink-2); }

/* ============================ Badge block (about) ============================ */
.badge-preview { margin: 4px 0 18px; }
.badge-label { margin: 0 0 6px; font: 11px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.badge-code { margin: 0 0 16px; padding: 12px 14px; border: 1px solid var(--rule); overflow-x: auto; }
.badge-code code { font: 12.5px/1.5 var(--mono); color: var(--ink-2); white-space: pre; }
.badge-note { margin: 0; font-size: 14.5px; color: var(--muted); }

/* ============================ Forms ============================ */
.feedback-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 40px; }
.feedback-form label {
  display: flex; flex-direction: column; gap: 6px;
  font: 11px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
.feedback-form .full { grid-column: 1 / -1; }
.feedback-form input, .feedback-form select, .feedback-form textarea {
  width: 100%;
  padding: 8px 0;
  border: 0;
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: 400 17px/1.4 var(--sans);
  letter-spacing: 0;
  text-transform: none;
}
.feedback-form textarea { min-height: 150px; padding: 12px; border: 1px solid var(--ink); resize: vertical; }
.feedback-form input::placeholder, .feedback-form textarea::placeholder { color: var(--muted); opacity: 0.8; }
.feedback-form input:focus, .feedback-form select:focus, .feedback-form textarea:focus { outline: 0; box-shadow: 0 1px 0 var(--ink); }
.feedback-form textarea:focus { box-shadow: 0 0 0 1px var(--ink); }
.action-row { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.hp-field { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ============================ Guestbook ============================ */
.guestbook { display: grid; grid-template-columns: minmax(0, 400px) minmax(0, 1fr); align-items: start; gap: 72px; }
.guestbook-compose { position: sticky; top: 24px; }
.guestbook-compose h2, .guestbook-wall-head h2 { font-size: 30px; letter-spacing: -0.015em; }
.guestbook-note { margin: 10px 0 24px; color: var(--muted); font-size: 15px; }
.guestbook .feedback-form { grid-template-columns: 1fr; }
.guestbook-wall-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--ink); }
.guestbook-count { font: 12.5px/1 var(--mono); color: var(--muted); }
.guestbook-list { list-style: none; margin: 0; padding: 0; }
.guestbook-entry { padding: 18px 0 20px; border-bottom: 1px solid var(--rule-2); }
.guestbook-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.guestbook-name { font: 600 20px/1.2 var(--serif); }
.guestbook-time { font: 12px/1 var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.guestbook-message { margin: 8px 0 0; color: var(--ink-2); white-space: pre-wrap; overflow-wrap: anywhere; }
.guestbook-reply { margin-top: 14px; padding-left: 14px; border-left: 2px solid var(--ink); }
.guestbook-reply-label { font: 11px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.guestbook-reply p { margin: 4px 0 0; color: var(--ink-2); white-space: pre-wrap; overflow-wrap: anywhere; }

/* ============================ Footer ============================ */
.site-footer { margin-top: 40px; padding-bottom: 56px; font: 12px/1.6 var(--mono); color: var(--muted); }
.footer-row {
  max-width: calc(var(--max) - 2 * var(--gutter));
  margin: 0 var(--gutter);
  padding-top: 20px;
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 16px 32px;
  flex-wrap: wrap;
}
@media (min-width: 1240px) { .footer-row { margin: 0 auto; } }
.footer-links { display: flex; gap: 6px 22px; flex-wrap: wrap; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; }

/* Owner entry (injected by xopen-site.js) — keep it discreet */
.owner-entry { position: fixed; right: 16px; bottom: 16px; width: 16px; height: 16px; z-index: 80; opacity: 0.12; color: var(--muted); }
.owner-entry:hover { opacity: 0.6; }
.owner-entry span, .owner-entry span::before { position: absolute; display: block; content: ""; }
.owner-entry span { left: 4px; top: 7px; width: 8px; height: 6px; border: 1.5px solid currentColor; border-radius: 2px; }
.owner-entry span::before {
  left: 1px; top: -6px; width: 6px; height: 6px;
  border: 1.5px solid currentColor; border-right-color: transparent; border-bottom-color: transparent;
  border-radius: 7px 7px 0 0; transform: rotate(-16deg);
}

/* 中日文没有真正的斜体，合成斜体很难看：这些位置改回正体，只让 "Open" 保持斜体 */
:lang(zh) .mast h1 .sub, :lang(zh) .find input, :lang(zh) .none,
:lang(ja) .mast h1 .sub, :lang(ja) .find input, :lang(ja) .none { font-style: normal; }
/* 大标题里的中日文只在标点处换行，不把一个词劈成两行；实在放不下再任意断 */
:lang(zh) .mast h1, :lang(ja) .mast h1 { word-break: keep-all; overflow-wrap: anywhere; }

/* ============================ Responsive ============================ */
@media (max-width: 980px) {
  :root { --cols: 36px minmax(170px, 220px) minmax(0, 1fr) 92px 56px 10px 20px; }
  .lhead .c2, .lhead .c5, .meta .cat, .meta .act { display: none; }
}
@media (max-width: 760px) {
  :root { --gutter: 18px; }
  .nav-inner { flex-wrap: wrap; gap: 12px 20px; padding-bottom: 18px; }
  .nav-links { order: 3; width: 100%; gap: 20px; overflow-x: auto; scrollbar-width: none; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-side { gap: 16px; }
  .mast { grid-template-columns: 1fr; gap: 36px; padding: 48px 0 40px; }
  .find input { font-size: 24px; }
  kbd { display: none; }
  .controls { padding: 14px 0 20px; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; margin: 0 -18px; padding: 0 18px 6px; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs button { white-space: nowrap; }
  .lhead { display: none; }
  .ledger { border-top: 1px solid var(--ink); }
  .row { grid-template-columns: 26px minmax(0, 1fr) 10px 20px; column-gap: 10px; row-gap: 5px; padding: 14px 18px; margin: 0 -18px; }
  .ledger[data-sort="az"] .row.first::before { left: 18px; right: 18px; }
  .ledger[data-sort="az"] .row.first .idx::before { font-size: 26px; }
  .row .name { font-size: 20px; }
  .idx { grid-area: 1 / 1; }
  .row .name { grid-area: 1 / 2; }
  .row .dot { grid-area: 1 / 3; }
  .tog { grid-area: 1 / 4; }
  .row .desc { grid-area: 2 / 2 / auto / -1; }
  .meta { display: flex; gap: 14px; grid-area: 3 / 2 / auto / -1; color: var(--muted); }
  .meta .cat { display: inline; }
  .meta .nil { display: none; }
  .meta .stars::before { content: "★ "; }
  .more { grid-area: 4 / 2 / auto / -1; }
  .shead { grid-template-columns: 1fr; gap: 12px; }
  .radar, .alts, .band { margin-top: 56px; }
  .log li { grid-template-columns: 92px minmax(0, 1fr); row-gap: 2px; }
  .log .who { grid-column: 1 / -1; grid-row: 1; }
  .log .note { display: none; }
  .mast.proj { padding: 40px 0 0; }
  .radar ol, .grid-2, .alt-grid, .feedback-form { grid-template-columns: 1fr; }
  .page-hero { padding: 44px 0 32px; }
  .section { padding-bottom: 52px; }
  .guestbook { grid-template-columns: 1fr; gap: 44px; }
  .guestbook-compose { position: static; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}