:root {
  color-scheme: light dark;
  --bg: light-dark(#f1eee6, #111512);
  --surface: light-dark(#fffdf8, #192019);
  --surface-subtle: light-dark(#f8f5ed, #202820);
  --text: light-dark(#20241f, #edf2eb);
  --muted: light-dark(#5c645c, #b8c0b7);
  --line: light-dark(#d4d0c5, #3c473e);
  --line-strong: light-dark(#999d94, #7b887e);
  --accent: light-dark(#155a4d, #8dd5c1);
  --accent-strong: light-dark(#0d473d, #b3e7d9);
  --accent-soft: light-dark(#e4efea, #213a33);
  --danger: light-dark(#9e3829, #ff9e8b);
  --danger-soft: light-dark(#f7e8e3, #42261f);
  --warning: light-dark(#765500, #efd078);
  --warning-soft: light-dark(#f3ecd5, #3c3218);
  --success: light-dark(#21643e, #8fd4a8);
  --success-soft: light-dark(#e6f1e8, #20382a);
  --focus: light-dark(#006c5a, #a6ebdc);
  --code-bg: light-dark(#ece9e1, #111812);
  --max: 1180px;
  --radius-sm: 4px;
  --radius: 8px;
  --space-1: .375rem;
  --space-2: .625rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.25rem;
  --space-6: 3.5rem;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", sans-serif;
  --mono: ui-monospace, "Cascadia Code", "Noto Sans Mono CJK JP", Consolas, monospace;
}

:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
button, input, textarea, select { font: inherit; }
button, select { min-height: 2.75rem; }
textarea, input, select { font-size: max(1rem, 16px); }
button { cursor: pointer; }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--accent-strong); }
img, svg { max-width: 100%; }
code, pre, textarea.code-input { font-family: var(--mono); }
code { padding: .1em .25em; background: var(--code-bg); border-radius: 3px; }
pre { max-width: 100%; overflow: auto; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  left: 1rem;
  top: 1rem;
  padding: .7rem 1rem;
  background: var(--text);
  color: var(--surface);
  transform: translateY(-180%);
}
.skip-link:focus { transform: none; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
}
.site-header__inner {
  width: min(calc(100% - 2rem), var(--max));
  min-height: 4.25rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--surface);
}
.brand small { margin-left: .4rem; color: var(--muted); font-size: .72rem; font-weight: 500; }
.site-nav { justify-self: end; display: flex; gap: var(--space-4); }
.site-nav a { color: var(--text); text-decoration: none; font-size: .9rem; }
.theme-button, .menu-button {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: .55rem .8rem;
}
.menu-button { display: none; }

.site-main {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: var(--space-5) 0 var(--space-6);
}
.site-footer { border-top: 1px solid var(--line); }
.site-footer > div {
  width: min(calc(100% - 2rem), var(--max));
  min-height: 5rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  color: var(--muted);
  font-size: .9rem;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: var(--space-3); }

.eyebrow, .category-label {
  margin: 0 0 .5rem;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
}
.page-intro { max-width: 52rem; margin-bottom: var(--space-5); }
.page-intro h1, .home-intro h1 {
  margin: 0;
  max-width: 15em;
  font-size: clamp(2rem, 5vw, 3.75rem);
  line-height: 1.15;
  letter-spacing: -.035em;
}
.page-intro p, .home-intro__copy { max-width: 46rem; color: var(--muted); }
.home-intro { padding: var(--space-5) 0 var(--space-4) var(--space-4); border-left: 3px solid var(--accent); }
.home-intro__jump { display: inline-flex; margin-top: .4rem; font-weight: 700; }

.section-heading {
  margin-bottom: var(--space-4);
  display: grid;
  grid-template-columns: minmax(8rem, .35fr) 1fr;
  gap: var(--space-4);
  align-items: end;
}
.section-heading p { margin: 0; color: var(--accent); font-weight: 700; }
.section-heading h2 { margin: 0; font-size: clamp(1.4rem, 3vw, 2.1rem); }

.tool-directory, .promises { margin-top: var(--space-6); }
.tool-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.tool-group h3 { margin: 0 0 var(--space-2); font-size: .9rem; color: var(--muted); }
.tool-link {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-2);
  align-items: center;
  padding: .9rem 0;
  border-top: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}
.tool-link:last-child { border-bottom: 1px solid var(--line); }
.tool-link strong, .tool-link small { display: block; }
.tool-link small { margin-top: .15rem; color: var(--muted); }
.tool-link__arrow { color: var(--accent); font-size: 1.2rem; }

.promises ol { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.promises li { padding-top: var(--space-3); border-top: 3px solid var(--line); }
.promises li > span { color: var(--danger); font-size: .78rem; font-weight: 700; }
.promises strong { display: block; margin: .25rem 0; }
.promises p { margin: 0; color: var(--muted); font-size: .92rem; }

.breadcrumb { margin-bottom: var(--space-4); color: var(--muted); font-size: .88rem; }
.breadcrumb ol { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: .5rem; }
.tool-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-5); margin-bottom: var(--space-4); }
.tool-heading h1 { margin: 0; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.2; }
.tool-heading__lead { max-width: 46rem; margin: .65rem 0 0; color: var(--muted); }
.data-note { min-width: 14rem; margin: 0; padding: .8rem 1rem; border-left: 3px solid var(--accent); background: var(--accent-soft); font-size: .85rem; }

.button, .primary-button, .secondary-button, .ghost-button, .text-button, .filter-button, .sample-button {
  min-height: 2.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: .62rem 1rem;
  font-weight: 700;
}
.button-primary, .primary-button {
  background: var(--accent);
  color: light-dark(#fff, #10201a);
}
.button-secondary, .secondary-button, .filter-button, .sample-button {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--text);
}
.ghost-button, .text-button { background: transparent; color: var(--accent); }
.filter-button.active, .filter-button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.primary-button:hover, .button-primary:hover { background: var(--accent-strong); color: var(--surface); }

.related-tools { margin-top: var(--space-5); padding-top: var(--space-3); border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1rem; }
.related-tools strong { font-size: .9rem; }
.content-section { max-width: 58rem; margin: var(--space-6) auto 0; }
.content-section > h2 { font-size: clamp(1.35rem, 3vw, 1.85rem); }
.content-section > p, .content-section li { color: var(--muted); }
.content-section details { border-top: 1px solid var(--line); }
.content-section details:last-child { border-bottom: 1px solid var(--line); }
.content-section summary { padding: 1rem 0; font-weight: 700; cursor: pointer; }
.content-section details p { margin: 0 0 1rem; }
.updates-list { margin: 0; padding: 0; list-style: none; }
.updates-list li { padding: var(--space-4) 0; border-top: 1px solid var(--line); }
.updates-list li:last-child { border-bottom: 1px solid var(--line); }
.updates-list time { color: var(--muted); font-size: .9rem; }
.updates-list h2 { margin: .25rem 0; font-size: 1.25rem; }
.updates-list p { margin: 0; }
.notice-box, .important-note, .scope-box { margin-top: var(--space-3); padding: 1rem; border-left: 3px solid var(--warning); background: var(--warning-soft); }
.notice-box p, .important-note p, .scope-box p { margin: .25rem 0 0; }
.scope-box ul { margin-bottom: 0; }

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 820px) {
  .site-header__inner { grid-template-columns: 1fr auto auto; gap: .5rem; }
  .menu-button { display: inline-block; }
  .site-nav {
    display: none;
    grid-column: 1 / -1;
    justify-self: stretch;
    padding: .5rem 0 1rem;
    flex-direction: column;
    gap: 0;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .7rem 0; border-top: 1px solid var(--line); }
  .tool-groups, .promises ol { grid-template-columns: 1fr; }
  .section-heading { grid-template-columns: 1fr; gap: .25rem; }
  .tool-heading { flex-direction: column; }
  .data-note { width: 100%; min-width: 0; }
  .site-footer > div { align-items: flex-start; flex-direction: column; padding: 1rem 0; }
}

@media (max-width: 520px) {
  .site-main { width: min(calc(100% - 1.25rem), var(--max)); padding-top: var(--space-4); }
  .site-header__inner, .site-footer > div { width: min(calc(100% - 1.25rem), var(--max)); }
  .brand small { display: none; }
  .theme-button { padding-inline: .65rem; font-size: .82rem; }
  .home-intro { padding: var(--space-4) 0 var(--space-3) var(--space-3); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (forced-colors: active) {
  .brand__mark, .primary-button, .button-primary { border: 1px solid ButtonText; }
  .data-note, .notice-box, .important-note, .scope-box { border-left-color: Highlight; }
}