:root {
  color-scheme: light;
  --bg: #f4efe7;
  --bg-strong: #efe7db;
  --surface: rgba(255,255,255,0.78);
  --surface-strong: rgba(255,255,255,0.92);
  --surface-soft: rgba(255,255,255,0.58);
  --fg: #181714;
  --muted: #655f55;
  --line: #d9cfbf;
  --line-strong: #c8b9a1;
  --shadow: 0 24px 60px rgba(54, 42, 19, 0.08);
  --accent: #8a5a22;
  --accent-soft: rgba(138, 90, 34, 0.12);
  --accent-strong: #6c4516;
  --success: #2f6b46;
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max-width: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--fg);
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.62), transparent 36%),
    linear-gradient(180deg, #faf8f4 0%, var(--bg) 100%);
}

body.theme-thread {
  --accent: #7f5928;
  --accent-soft: rgba(127, 89, 40, 0.12);
  --accent-strong: #5e421d;
}
body.theme-inch-mm {
  --accent: #3c7b74;
  --accent-soft: rgba(60, 123, 116, 0.12);
  --accent-strong: #245a54;
}
body.theme-holes {
  --accent: #8b4c3b;
  --accent-soft: rgba(139, 76, 59, 0.12);
  --accent-strong: #673427;
}
body.theme-wrench-size {
  --accent: #4d5f8d;
  --accent-soft: rgba(77, 95, 141, 0.12);
  --accent-strong: #354264;
}
body.theme-weight {
  --accent: #5a566b;
  --accent-soft: rgba(90, 86, 107, 0.12);
  --accent-strong: #403c4d;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select {
  font: inherit;
}

.site-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(250, 248, 244, 0.78);
  border-bottom: 1px solid rgba(201, 190, 174, 0.7);
}

.topbar-inner,
.page-shell,
.site-footer {
  max-width: calc(var(--max-width) + 40px);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.topbar-inner {
  display: grid;
  gap: 14px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.topbar-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--fg);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255,255,255,0.96), var(--accent-soft));
  border: 1px solid rgba(255,255,255,0.78);
  box-shadow: 0 12px 22px rgba(0,0,0,0.05);
  font-size: 20px;
  font-weight: 800;
  color: var(--accent-strong);
}

.logo-copy {
  display: grid;
  gap: 2px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-copy small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
}

.topbar-status {
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 6px rgba(47,107,70,0.08);
}

.section-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.switcher-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--fg);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.switcher-link:hover {
  text-decoration: none;
  border-color: var(--line-strong);
  background: var(--surface);
}

.switcher-link.is-active {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #fff;
}

.switcher-count {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.18);
  font-size: 12px;
  font-weight: 700;
}

.page-shell {
  padding-top: 24px;
  padding-bottom: 40px;
}

.page-shell--wide {
  max-width: calc(var(--max-width) + 80px);
}

.breadcrumbs {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs .current {
  color: var(--fg);
  font-weight: 600;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
  gap: 18px;
  margin-bottom: 18px;
}

.hero-main,
.hero-side,
.panel,
.page-card,
.hub-card,
.home-card,
.quick-link-card,
.task-card {
  border: 1px solid rgba(219, 209, 195, 0.86);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, var(--surface-strong) 0%, rgba(255,255,255,0.74) 100%);
  box-shadow: var(--shadow);
}

.hero-main,
.hero-side,
.panel,
.page-card,
.hub-card,
.home-card,
.quick-link-card,
.task-card {
  padding: 24px;
}

.eyebrow {
  margin-bottom: 8px;
  color: var(--accent-strong);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.badge,
.card-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(166, 145, 112, 0.24);
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.hero h1,
.home-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.lede {
  margin: 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
}

.hero-actions {
  margin-top: 16px;
}

.quick-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.related-chip {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.86);
  color: var(--fg);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.related-chip:hover {
  text-decoration: none;
  border-color: var(--line-strong);
  background: #fff;
}

.hero-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.illustration-card {
  min-height: 192px;
  border-radius: 20px;
  padding: 18px;
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.95), rgba(255,255,255,0.36) 44%, transparent 68%),
    linear-gradient(135deg, rgba(255,255,255,0.7), var(--accent-soft));
  border: 1px solid rgba(255,255,255,0.7);
}

.hero-summary {
  display: grid;
  gap: 12px;
}

.summary-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.summary-head strong {
  font-size: 16px;
}

.summary-head span {
  color: var(--muted);
  font-size: 13px;
}

.summary-grid,
.home-metrics,
.result-grid,
.selector-result-grid,
.stats-grid,
.task-grid,
.page-grid,
.quick-grid {
  display: grid;
  gap: 12px;
}

.summary-grid,
.home-metrics,
.stats-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.summary-grid--single {
  grid-template-columns: minmax(0, 1fr);
}

.result-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.result-grid--triple {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.selector-result-grid,
.task-grid,
.page-grid,
.quick-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card,
.metric-chip {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 14px 15px;
  border-radius: 18px;
  border: 1px solid rgba(220, 209, 192, 0.88);
  background: rgba(255,255,255,0.78);
}

.stat-label,
.metric-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.stat-value,
.metric-value {
  font-size: 24px;
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--fg);
}

.stat-note {
  color: var(--muted);
  font-size: 13px;
}

.section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.section-head h2 {
  margin: 0 0 6px;
  font-size: 26px;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  max-width: 68ch;
  color: var(--muted);
  line-height: 1.6;
}

.panel + .panel {
  margin-top: 18px;
}

.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.table-info {
  color: var(--muted);
  font-size: 14px;
}

.filter-box {
  min-width: min(100%, 320px);
}

.filter-box input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.9);
  padding: 12px 14px;
  color: var(--fg);
}

.filter-box input:focus,
.field input:focus,
.field select:focus {
  outline: 2px solid rgba(120, 102, 71, 0.18);
  border-color: var(--line-strong);
  outline-offset: 0;
}

.table-wrap {
  overflow: auto;
  border-radius: 18px;
  border: 1px solid rgba(216, 204, 187, 0.9);
  background: rgba(255,255,255,0.78);
}

.table-wrap table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

.table-wrap th,
.table-wrap td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(220, 210, 198, 0.9);
}

.table-wrap thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f6f0e7;
  color: var(--fg);
  font-size: 13px;
  font-weight: 800;
}

.table-wrap tbody th {
  font-weight: 700;
}

.table-wrap tr:last-child td,
.table-wrap tr:last-child th {
  border-bottom: 0;
}

.table-wrap tr.is-highlighted {
  background: rgba(255, 246, 227, 0.88);
}

.table-wrap tr:hover {
  background: rgba(255,255,255,0.96);
}

.row-label {
  white-space: nowrap;
}

.table-empty {
  display: none;
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px dashed var(--line-strong);
  color: var(--muted);
}

.table-empty.is-visible {
  display: block;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  gap: 16px;
  align-items: start;
}

.tool-side,
.result-card {
  border-radius: 20px;
  border: 1px solid rgba(220, 208, 192, 0.9);
  background: rgba(255,255,255,0.8);
  padding: 18px;
}

.tool-grid {
  display: grid;
  gap: 12px;
}

.tool-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.field input,
.field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--fg);
  padding: 12px 14px;
}

.field-hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.tool-actions button,
.copy-button {
  border: 0;
  border-radius: 14px;
  min-height: 44px;
  padding: 0 16px;
  background: var(--accent-strong);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(0,0,0,0.07);
}

.copy-button.is-quiet,
.tool-actions .copy-button.is-quiet {
  background: rgba(255,255,255,0.82);
  color: var(--fg);
  border: 1px solid var(--line);
  box-shadow: none;
}

.tool-actions button:hover,
.copy-button:hover {
  filter: brightness(1.03);
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preset-chip {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.9);
  color: var(--fg);
  border-radius: 999px;
  min-height: 36px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.result-card {
  display: grid;
  gap: 14px;
}

.result-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-value {
  font-size: clamp(36px, 5vw, 52px);
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 800;
}

.result-unit {
  color: var(--muted);
  font-size: 16px;
  font-weight: 600;
}

.note-card {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border-radius: 18px;
  background: var(--bg-strong);
  border: 1px solid rgba(218, 205, 186, 0.92);
}

.note-card strong {
  display: block;
  margin-bottom: 2px;
}

.note-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 15px;
}

.panel-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.panel-list li + li {
  margin-top: 6px;
}

.page-card,
.hub-card,
.home-card,
.quick-link-card,
.task-card {
  display: block;
  color: inherit;
  text-decoration: none;
}

.page-card:hover,
.hub-card:hover,
.home-card:hover,
.quick-link-card:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.page-card strong,
.hub-card strong,
.home-card strong,
.quick-link-card strong,
.task-card strong {
  display: block;
  font-size: 18px;
  line-height: 1.2;
  margin-bottom: 8px;
}

.page-card p,
.hub-card p,
.home-card p,
.quick-link-card p,
.task-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.meta {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.card-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 700;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.9fr);
  gap: 18px;
  margin-bottom: 18px;
}

.quick-link-card {
  display: grid;
  gap: 8px;
}

.home-card .meta,
.quick-link-card .meta,
.task-card .meta {
  margin-top: 8px;
}

.site-footer {
  padding-bottom: 40px;
}

.site-footer-inner {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

.copy-feedback {
  min-width: 88px;
  color: var(--muted);
  font-size: 12px;
}

.is-hidden {
  display: none !important;
}

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

@media (max-width: 960px) {
  .hero,
  .home-hero,
  .tool-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .summary-grid,
  .home-metrics,
  .result-grid,
  .selector-result-grid,
  .stats-grid,
  .task-grid,
  .page-grid,
  .quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .topbar-inner,
  .page-shell,
  .site-footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .topbar-main {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-main,
  .hero-side,
  .panel,
  .page-card,
  .hub-card,
  .home-card,
  .quick-link-card,
  .task-card {
    border-radius: 20px;
    padding: 20px;
  }

  .summary-grid,
  .home-metrics,
  .result-grid,
  .selector-result-grid,
  .stats-grid,
  .task-grid,
  .page-grid,
  .quick-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .tool-grid--two {
    grid-template-columns: minmax(0, 1fr);
  }

  .table-wrap table {
    min-width: 480px;
  }
}