:root {
  color-scheme: light;
  --bg: #f0ede6;
  --bg-panel: #e6dfd3;
  --bg-panel-2: #161512;
  --border: #d3ccbf;
  --line-strong: #b5ad9f;
  --accent: #1a1916;
  --accent-dark: #0b0b0a;
  --text: #161512;
  --text-muted: #6b665c;
  --success: #4f7a4a;
  --warn: #a8792e;
  --error: #a8432f;
  --on-accent: #ffffff;
  --on-dark: #e9e4d9;
  --on-dark-soft: #b8b2a5;
  --net-line: #8a857a;
  --ill-sage: #8f9a7e;
  --ill-clay: #c08a5b;
  --ill-slate: #7f97ad;
  --ill-plum: #6b4a55;
  --ill-sand: #d9c7a3;
  --ill-bone: #ece6da;
  --pat-ink: rgba(22, 21, 18, 0.26);
  --pat-light: rgba(236, 230, 218, 0.34);
  --clear: transparent;

  --font-display: "Inter", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans", "Apple SD Gothic Neo", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --font-serif: Georgia, "Songti SC", "STSong", "Noto Serif SC", serif;

  --r-btn: 10px;
  --r-card: 24px;
  --r-panel: 28px;
  --r-tile: 4px;
  --r-shot: 10px;
  --r-placeholder: 9px;
  --r-pill: 999px;
  --r-circle: 50%;
  --gutter: clamp(20px, 5vw, 72px);
  --nav-h: 88px;
  --strip-h: 44px;
  --reading-width: 1120px;
  --header-width: 1280px;
  --section-space: 144px;
  --card-pad: clamp(22px, 3vw, 40px);
  --ease: 160ms ease;
  --reveal-time: 480ms;
  --text-xs: 11px;
  --text-sm: 13px;
  --text-nav: 15px;
  --text-base: 16px;
  --text-definition: 17px;
  --text-lead: 20px;
  --text-h3: 24px;
  --text-h2: clamp(28px, 3vw, 40px);
  --text-h1: clamp(34px, 3.35vw, 48px);
  --text-headword: clamp(28px, 3.35vw, 48px);
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-brand: 800;
  --weight-display: 900;
  --tracking-heading: -0.02em;
  --tracking-label: 0.12em;
  --tracking-word: -0.025em;
  --leading-body: 1.6;
  --leading-reading: 1.85;
  --leading-heading: 1.14;
}

*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; }
img { display: block; height: auto; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button, a { -webkit-tap-highlight-color: var(--clear); }
a { color: inherit; text-underline-offset: 0.2em; }
button:disabled { cursor: not-allowed; }
[hidden] { display: none !important; }
:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: var(--r-tile);
}
::selection { background: var(--text); color: var(--bg); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  text-wrap: balance;
  overflow-wrap: break-word;
}
h1 { margin: 0 0 30px; font-size: var(--text-h1); }
h2 { margin: 0 0 24px; font-size: var(--text-h2); }
h3 { margin: 0 0 16px; font-size: var(--text-h3); }
p { margin: 0 0 20px; }
strong { font-weight: var(--weight-bold); }
code, pre, kbd, samp { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; font-size: 0.88em; }
pre {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 20px;
  background: var(--bg-panel-2);
  color: var(--on-dark);
  border-radius: var(--r-btn);
  line-height: 1.7;
  tab-size: 2;
}
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; font-size: var(--text-sm); }
hr { border: 0; border-top: 1px solid var(--border); margin-block: 32px; }
figure { margin: 0; }
.wrap {
  width: 100%;
  max-width: calc(var(--reading-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-top: var(--section-space); padding-bottom: var(--section-space); }
.section-dark { background: var(--bg-panel-2); color: var(--on-dark); }
.section-dark :focus-visible { outline-color: var(--on-dark); }
.section-dark .muted { color: var(--on-dark-soft); }
.grid-two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid-two > *, .wrap > *, .hero > *, .header-inner > *, .footer-grid > * { min-width: 0; }
.stack > * + * { margin-top: 24px; }
.nowrap { white-space: nowrap; }
.muted { color: var(--text-muted); }
.serif { font-family: var(--font-serif); }
.lead { font-size: var(--text-lead); line-height: 1.7; }
.meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-label);
  color: var(--text-muted);
}
.prose { min-width: 0; max-width: 76ch; line-height: var(--leading-reading); }
.prose h2 { margin-top: 64px; }
.prose h3 { margin-top: 36px; }
.prose li + li { margin-top: 8px; }
.prose a { overflow-wrap: anywhere; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: 8px;
  left: var(--gutter);
  z-index: 100;
  transform: translateY(-160%);
  padding: 12px 20px;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--r-btn);
}
.skip-link:focus { transform: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  max-width: 100%;
  padding: 12px 20px 12px 22px;
  border: 1px solid var(--clear);
  border-radius: var(--r-btn);
  font-family: var(--font-body);
  font-size: var(--text-nav);
  font-weight: var(--weight-semibold);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--ease), color var(--ease);
}
.btn svg { flex-shrink: 0; }
.btn-solid { background: var(--accent); color: var(--on-accent); }
.btn-solid:hover, .btn-solid.is-hover { background: var(--accent-dark); color: var(--on-accent); }
.btn-line { border-color: var(--accent); background: var(--clear); color: var(--text); }
.btn-line:hover { background: var(--bg-panel); color: var(--text); }
.btn:disabled, .btn[aria-disabled="true"] {
  background: var(--bg-panel);
  color: var(--text-muted);
  border-color: var(--line-strong);
}
.btn[aria-disabled="true"] { pointer-events: none; }
.btn.is-focus { outline: 2px solid var(--text); outline-offset: 3px; }
.btn-arrow {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--ease);
}
.btn:hover .btn-arrow { transform: translateX(3px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 34px; }
.card, .panel {
  min-width: 0;
  padding: var(--card-pad);
  background: var(--bg-panel);
  color: var(--text);
  border-radius: var(--r-card);
}
.card p:last-child, .panel p:last-child { margin-bottom: 0; }

#site-header { position: relative; z-index: 30; }
.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 32px;
  width: 100%;
  max-width: min(100%, calc(var(--header-width) + var(--gutter) * 2));
  min-height: var(--nav-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.brand-cell { flex-shrink: 0; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--text-definition);
  font-weight: var(--weight-brand);
  letter-spacing: -0.01em;
  text-decoration: none;
}
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; border-radius: var(--r-circle); }
.brand-placeholder {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-placeholder);
}
.primary-nav { margin-left: auto; min-width: 0; }
.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.primary-nav a {
  display: block;
  padding-block: 12px;
  color: var(--text);
  font-size: var(--text-nav);
  font-weight: var(--weight-normal);
  white-space: nowrap;
  text-decoration: none;
}
.primary-nav a:hover { text-decoration: underline; text-underline-offset: 6px; }
.primary-nav a[aria-current="page"] { font-weight: var(--weight-bold); }
.header-tools { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.language-control { position: relative; }
.lang {
  appearance: none;
  min-height: 44px;
  padding: 2px 0 2px 24px;
  background: var(--clear);
  color: var(--text-muted);
  border: 0;
  border-left: 1px solid var(--border);
  font-family: var(--font-body);
  font-size: 14px;
  white-space: nowrap;
}
.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 45;
  width: 190px;
  padding: 8px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-btn);
}
.language-menu a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; text-decoration: none; }
.language-menu a:hover, .language-menu a[aria-current] { background: var(--bg-panel); color: var(--text); }
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  background: var(--clear);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-btn);
}
.menu-toggle svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.mobile-drawer {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 42;
  max-height: calc(100dvh - var(--nav-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px var(--gutter) 28px;
  background: var(--bg);
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.mobile-drawer a {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 48px;
  padding: 12px 8px;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}
.mobile-drawer a[aria-current] { font-weight: var(--weight-bold); }
.drawer-label { margin: 24px 8px 8px; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-muted); }
.menu-veil { position: fixed; inset: 0; z-index: 20; background: var(--bg-panel-2); color: var(--on-dark); opacity: 0.4; border: 0; }
.home-layout #site-header, .masthead {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
}
.home-layout .header-inner, .masthead .header-inner {
  max-width: none;
  padding-right: 48px;
}
.home-layout .primary-nav a { color: var(--text); }
.home-layout .lang { color: var(--text-muted); border-left-color: var(--border); }
.home-layout .primary-nav :focus-visible { outline-color: var(--text); }
.masthead .primary-nav a { color: var(--on-dark); }
.masthead .lang { color: var(--on-dark-soft); border-left-color: var(--net-line); }
.masthead .primary-nav :focus-visible { outline-color: var(--on-dark); }

.hero {
  display: grid;
  grid-template-columns: 56fr 44fr;
  min-height: max(720px, calc(100vh - var(--strip-h)));
  overflow-x: clip;
}
.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 20px) clamp(24px, 4vw, 64px) 44px var(--gutter);
}
.copy-inner { max-width: 620px; min-width: 0; }
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: 100%;
  margin: 0 0 28px;
  padding: 6px 13px 6px 11px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}
.kicker-dot { width: 7px; height: 7px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--success); color: var(--on-accent); }
.headword { font-size: var(--text-headword); letter-spacing: var(--tracking-word); }
.headword-key { text-decoration-line: underline; text-decoration-thickness: 0.08em; text-underline-offset: 0.14em; text-decoration-skip-ink: none; }
.entry { border-top: 1px solid var(--border); padding-top: 22px; }
.phon { margin: 0 0 12px; font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: 0.01em; color: var(--text-muted); }
.phon-word { color: var(--text); font-weight: var(--weight-medium); }
.phon-pos { font-style: italic; }
.definition { margin: 0 0 26px; max-width: 35em; font-family: var(--font-serif); font-size: var(--text-definition); line-height: 1.78; color: var(--text); }
.facets { margin: 0; }
.facet { display: grid; grid-template-columns: 92px minmax(0, 1fr); align-items: center; column-gap: 12px; padding-block: 12px; border-top: 1px solid var(--border); }
.facet:last-child { border-bottom: 1px solid var(--border); }
.facet dt { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-label); color: var(--text-muted); }
.facet dd { margin: 0; min-width: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip { display: inline-block; max-width: 100%; padding: 4px 11px; border: 1px solid var(--line-strong); border-radius: var(--r-pill); font-family: var(--font-mono); font-size: 12px; line-height: 1.5; color: var(--text); overflow-wrap: anywhere; }
.devices dd { gap: 8px 22px; }
.device { display: inline-flex; align-items: center; gap: 7px; min-height: 30px; font-size: 14px; font-weight: var(--weight-medium); color: var(--text); text-decoration: none; }
a.device:hover { text-decoration: underline; }
.dev-ic { width: 19px; height: 19px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }
.dev-ic .solid { fill: currentColor; stroke: none; }
.store-pill { display: inline-flex; align-items: center; gap: 6px; padding: 3px 12px 3px 10px; border: 1px solid var(--accent); border-radius: var(--r-pill); font-size: var(--text-sm); font-weight: var(--weight-semibold); line-height: 1.6; }
.store-pill svg { width: 13px; height: 13px; fill: currentColor; margin-top: -2px; flex-shrink: 0; }
.ledger { min-height: var(--strip-h); display: flex; align-items: center; flex-wrap: wrap; gap: 10px 36px; padding: 10px var(--gutter); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-size: var(--text-xs); }
.ledger-item { display: inline-flex; flex-wrap: wrap; gap: 10px; }
.ledger-k { color: var(--text-muted); letter-spacing: var(--tracking-label); }
.ledger-v { color: var(--text); }
.ledger-next { margin-left: auto; color: var(--text-muted); letter-spacing: 0.08em; }

.site-footer { padding-top: 80px; padding-bottom: 32px; border-top: 1px solid var(--border); background: var(--bg); color: var(--text); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 1.2fr 0.7fr; gap: 40px; }
.footer-brand p { margin-top: 22px; max-width: 30em; color: var(--text-muted); font-family: var(--font-serif); }
.footer-title { margin: 0 0 20px; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-label); color: var(--text-muted); }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links a { display: inline-block; padding-block: 6px; text-decoration: none; font-size: 14px; }
.footer-links a:hover { text-decoration: underline; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-muted); }
.footer-bottom a { padding-block: 6px; }
.reveal { opacity: 1; }
.reveal.reveal-pending { opacity: 0; transform: translateY(14px); transition: opacity var(--reveal-time) ease, transform var(--reveal-time) ease; }
.reveal.shown { opacity: 1; transform: none; }

@media (max-width: 1279px) {
  .header-inner { gap: 20px; }
  #site-header .primary-nav { display: none; }
  #site-header .header-tools { margin-left: auto; }
  #site-header .menu-toggle { display: inline-flex; }
  .home-layout #site-header .header-tools { color: var(--text); }
  .home-layout #site-header .menu-toggle { color: var(--text); border-color: var(--border); }
}
@media (max-width: 1180px) {
  .masthead .primary-nav ul { gap: 22px; }
  .masthead .header-inner { gap: 22px; padding-right: 28px; }
  .lang { padding-left: 18px; }
  .ledger-item.opt { display: none; }
}
@media (max-width: 900px) {
  .home-layout #site-header, .masthead { position: relative; }
  .home-layout .header-inner, .masthead .header-inner { padding-inline: var(--gutter); }
  .home-layout #site-header .lang, .masthead .lang { color: var(--text-muted); border-left-color: var(--border); }
  .home-layout #site-header .menu-toggle { color: var(--text); border-color: var(--border); }
  .masthead .header-inner { flex-wrap: wrap; gap: 12px; padding-top: 18px; padding-bottom: 6px; }
  .masthead .brand-cell { width: 100%; }
  .masthead .primary-nav { margin-left: 0; }
  .masthead .primary-nav ul { gap: 20px; flex-wrap: wrap; }
  .masthead .primary-nav a { color: var(--text); }
  .masthead .header-tools { margin-left: auto; }
  .hero { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .hero-copy { padding: 28px var(--gutter); }
  .copy-inner { max-width: none; }
  .facet { grid-template-columns: 76px minmax(0, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 768px) {
  :root { --text-h1: clamp(24px, 4vw, 30px); --text-headword: clamp(24px, 4vw, 30px); }
  .headword { letter-spacing: var(--tracking-heading); }
  .grid-two { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  :root { --section-space: 144px; --gutter: 20px; }
  .header-inner { gap: 10px; }
  .brand { gap: 8px; font-size: 14px; }
  .brand-mark, .brand-placeholder { width: 30px; height: 30px; }
  .header-tools { gap: 8px; margin-left: auto; }
  .lang { padding-left: 10px; font-size: 12px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .tilt, [data-tilt] { transform: none !important; }
  .facet { grid-template-columns: minmax(0, 1fr); row-gap: 8px; }
  .devices dd { gap: 8px 16px; }
  .ledger-next { display: none; }
  .masthead .header-tools { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .btn-arrow, .reveal.reveal-pending { transition: none; }
  .btn:hover .btn-arrow, .reveal.reveal-pending { transform: none; }
  .reveal.reveal-pending { opacity: 1; }
}