:root {
  color-scheme: light;
  --paper: #faf7f0;
  --heading: #182715;
  --ink: #222720;
  --green: #234525;
  --moss: #697445;
  --muted: #555f52;
  --line: #8a9382;
  --wash: #e2e7d4;
  --field: #fffdf9;
  --error: #912e24;
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { background: var(--paper); }

body {
  margin: 0;
  color: var(--ink);
  font: 1rem/1.52 var(--sans);
  overflow-wrap: break-word;
}

h1, h2, h3, p, ol, ul, figure, fieldset { margin: 0; }

h1, h2, h3, .wordmark {
  color: var(--heading);
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.05;
}

a { color: var(--green); text-underline-offset: 0.18em; }

a:hover { text-decoration-thickness: 0.12em; }

:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 4px;
}

:target { scroll-margin-top: 1rem; }

.wrap {
  width: min(92.8%, 86.25rem);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  padding: 0.75rem 1rem;
  background: var(--field);
  transform: translateY(calc(-100% - 2rem));
}

.skip-link:focus { transform: none; }

.site-header {
  min-height: 4.4rem;
  border-bottom: 1px solid var(--green);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.2rem 1.25rem;
}

.wordmark {
  font-size: clamp(2rem, 3vw, 2.85rem);
  letter-spacing: -0.045em;
  text-decoration: none;
}

.site-header nav, .site-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: clamp(1rem, 3vw, 2.7rem);
}

.site-header nav a, .site-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--heading);
  text-decoration: none;
}

.site-header nav a { font-size: clamp(0.9rem, 1.4vw, 1.25rem); }

.site-header nav a:hover, .site-footer a:hover { text-decoration: underline; }

.site-header nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.3em;
}

.hero {
  display: grid;
  align-items: center;
  gap: clamp(1.4rem, 3.2vw, 3rem);
  padding-block: clamp(1.25rem, 1.8vw, 1.65rem);
}

.home-hero {
  grid-template-columns: minmax(0, 0.67fr) minmax(0, 1fr);
  padding-bottom: 0.45rem;
}

.home-hero .hero-copy {
  align-self: start;
  padding-top: clamp(0rem, 2vw, 1.9rem);
}

.hero-text-only { grid-template-columns: minmax(0, 1fr); }

.hero h1 {
  font-size: clamp(2.9rem, 5.06vw, 5rem);
  line-height: 0.99;
  letter-spacing: -0.049em;
  text-wrap: balance;
}

.hero-copy > p {
  max-width: 60ch;
  margin-top: 1.25rem;
  font-size: clamp(1rem, 1.37vw, 1.25rem);
  line-height: 1.42;
}

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  margin-top: 0.65rem;
  font-size: clamp(1rem, 1.45vw, 1.22rem);
  font-weight: 650;
}

.hero-link svg { flex: none; }

.hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2.05;
  object-fit: cover;
}

.hero-figure figcaption {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: right;
}

.guide-list {
  list-style: none;
  padding: 0;
  border-top: 1px solid var(--line);
}

.guide-list > li { border-bottom: 1px solid var(--line); }

.guide-row {
  display: grid;
  grid-template-columns: minmax(3.25rem, 12.4%) minmax(0, 40%) minmax(0, 1fr) 2rem;
  align-items: center;
  gap: 1rem;
  min-height: 6rem;
  padding-block: 0.8rem;
  color: var(--ink);
  text-decoration: none;
}

.guide-row:hover h3, .guide-row:focus-visible h3 { text-decoration: underline; }

.guide-row h3 {
  font-size: clamp(1.75rem, 2.95vw, 2.85rem);
  letter-spacing: -0.035em;
  line-height: 1.12;
}

.guide-row p { font-size: clamp(0.92rem, 1.25vw, 1.16rem); }

.section-number {
  color: var(--moss);
  font: 500 clamp(2.15rem, 4.15vw, 4rem)/1 var(--serif);
  font-variant-numeric: lining-nums tabular-nums;
  white-space: nowrap;
}

.guide-row svg { color: var(--green); }

.calculator-strip {
  display: grid;
  grid-template-columns: minmax(0, 0.53fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(1.2rem, 2.4vw, 2.2rem);
  margin-top: clamp(1.35rem, 2.15vw, 2rem);
  padding: clamp(1rem, 1.8vw, 1.55rem) clamp(1rem, 2.4vw, 2.25rem);
  border-radius: 0.55rem;
  background: var(--wash);
}

.calculator-intro h2 {
  font-size: clamp(1.72rem, 2.45vw, 2.35rem);
  letter-spacing: -0.035em;
}

.calculator-intro p { margin-top: 0.3rem; }

.calculator-strip .calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(9rem, 0.42fr);
  gap: clamp(0.9rem, 2.1vw, 2rem);
  padding-left: clamp(1rem, 2vw, 2rem);
  border-left: 1px solid var(--line);
}

.calculator-fields {
  display: grid;
  gap: 0.8rem;
  align-items: end;
  min-width: 0;
  padding: 0;
  border: 0;
}

.calculator-strip .calculator-fields {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: clamp(0.65rem, 1.6vw, 1.45rem);
}

.field label {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--heading);
  font-size: 0.9rem;
  line-height: 1.28;
}

.field input {
  width: 100%;
  min-height: 44px;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--muted);
  border-radius: 0.35rem;
  background: var(--field);
  color: var(--ink);
  font: inherit;
}

.field input::placeholder { color: var(--muted); }

.field input[aria-invalid="true"] { border-color: var(--error); }

.field-error {
  color: var(--error);
  font-size: 0.8rem;
}

.calculator-result {
  color: var(--green);
  font-size: clamp(1rem, 1.6vw, 1.32rem);
  font-weight: 680;
  line-height: 1.35;
}

.calculator-result noscript p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.calculator-strip .calculator-result {
  align-content: center;
  padding-left: clamp(0.9rem, 2vw, 1.8rem);
  border-left: 1px solid var(--line);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0 1.2rem;
  margin-top: clamp(1.4rem, 2.1vw, 2rem);
  padding-bottom: 0.55rem;
  border-top: 1px solid var(--green);
  font-size: 0.94rem;
}

.site-footer nav { column-gap: clamp(1rem, 2.7vw, 2.4rem); }

.article-hero {
  grid-template-columns: minmax(0, 1.16fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--line);
}

.article-hero.hero-text-only { grid-template-columns: minmax(0, 1fr); }

.article-hero h1 { font-size: clamp(2.75rem, 5.15vw, 4.9rem); }

.article-hero .hero-figure img { aspect-ratio: 1.85; }

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.85rem;
  margin-top: 1.2rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.article-meta > * + * {
  border-left: 1px solid var(--line);
  padding-left: 0.85rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.29fr) minmax(0, 1fr);
  gap: clamp(1rem, 2.8vw, 2.5rem);
  margin-top: clamp(1.25rem, 2.3vw, 2rem);
}

.contents h2 {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  letter-spacing: -0.02em;
}

.contents ul, .related ul {
  list-style: none;
  padding: 0;
}

.contents ul { margin-top: 0.75rem; }

.contents a {
  display: flex;
  align-items: center;
  min-height: 2.65rem;
  padding-left: 0.85rem;
  border-left: 3px solid transparent;
  text-decoration: none;
}

.contents a:hover, .contents a:focus-visible {
  border-left-color: var(--moss);
  text-decoration: underline;
}

.reading-column {
  min-width: 0;
  padding-left: clamp(1rem, 2.8vw, 2.5rem);
  border-left: 1px solid var(--line);
  font-size: clamp(1rem, 1.38vw, 1.125rem);
}

.reading-section + .reading-section {
  margin-top: clamp(1.25rem, 2.25vw, 2rem);
  padding-top: clamp(1rem, 2.2vw, 1.75rem);
  border-top: 1px solid var(--line);
}

.reading-section h2 {
  display: flex;
  align-items: baseline;
  gap: clamp(0.75rem, 2.5vw, 2.2rem);
  margin-bottom: 0.65rem;
  font-size: clamp(1.8rem, 3.35vw, 3rem);
  letter-spacing: -0.04em;
}

.reading-section h2 .section-number { flex: none; }

.reading-section h2 > span:last-child { min-width: 0; overflow-wrap: anywhere; }

.reading-section p { max-width: 78ch; }

.reading-section p + p, .reading-section ul { margin-top: 0.65rem; }

.reading-section ul { padding-left: 1.35rem; }

.table-note { display: none; }

.table-download {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 0.35rem;
  font-weight: 650;
}

.table-region {
  overflow-x: auto;
  margin-block: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.25rem;
}

.table-region table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94em;
  line-height: 1.4;
}

.table-wide table { min-width: 33rem; }

.table-region:not(.table-wide) :is(th, td) { overflow-wrap: anywhere; hyphens: auto; }

.table-region th, .table-region td {
  padding: 0.6rem 0.8rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table-region :is(th, td):last-child { border-right: 0; }
.table-region tbody tr:last-child td { border-bottom: 0; }
.table-region th { background: var(--wash); }
.table-region td:first-child { font-weight: 650; }

.reading-column .calculator { margin-block: 1rem; }

.reading-column .calculator-fields { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.reading-column [data-calculator="shelf_fit"] .calculator-fields {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

[data-calculator="shelf_fit"] :is([data-field="trayWidth"], [data-field="lampWidth"]) {
  grid-column-start: 1;
}

.reading-column [data-field="minClearance"] { grid-column: span 2; }
.reading-column [data-field="minClearance"] input { width: min(100%, 20rem); }

.reading-column .calculator-result {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  border-radius: 0.55rem;
  background: var(--wash);
}

.reading-section .section-sources, .sources-list span {
  color: var(--muted);
  font-size: 0.87rem;
}

.sources-list { padding-left: 1.5rem; }
.sources-list li + li { margin-top: 0.55rem; }

.sources-list li:target {
  margin-inline: -0.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: 0.25rem;
  outline: 2px solid var(--moss);
  background: var(--wash);
}

.sources-list span { display: block; }

.related ul { padding-left: 0; }

.related a {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 44px;
}

@media (max-width: 65rem) {
  .calculator-strip { grid-template-columns: minmax(0, 1fr); }

  .calculator-strip .calculator {
    padding-left: 0;
    border-left: 0;
  }
}

@media (min-width: 50.01rem) {
  .contents {
    position: sticky;
    top: 1rem;
    align-self: start;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
  }
}

@media (max-width: 50rem) {
  .hero { gap: 1.1rem; }

  .guide-row {
    grid-template-columns: minmax(2.6rem, 9%) minmax(0, 1fr) 1.5rem;
    gap: 0.3rem 0.75rem;
  }

  .guide-row p { grid-column: 2; }

  .guide-row svg {
    grid-column: 3;
    grid-row: 1 / span 2;
    align-self: center;
  }

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

  .contents {
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--line);
  }

  .contents ul {
    display: flex;
    flex-wrap: wrap;
    column-gap: 1rem;
    margin-top: 0.45rem;
  }

  .contents a {
    padding-left: 0;
    border-left: 0;
    text-decoration: underline;
  }

  .reading-column {
    padding-left: 0;
    border-left: 0;
  }
}

@media (max-width: 37.5rem) {
  .wrap { width: calc(100% - 2.25rem); }

  .site-header { padding-top: 0.75rem; }

  .site-header nav { column-gap: 1.15rem; }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    padding-block: 1.25rem;
  }

  .home-hero .hero-copy { padding-top: 0; }

  .hero h1 { font-size: clamp(2.35rem, 10vw, 3.5rem); }

  .hero-copy > p { margin-top: 0.75rem; }

  .hero-figure img, .article-hero .hero-figure img { aspect-ratio: 1.7; }

  .guide-row {
    min-height: 0;
    padding-block: 1rem;
  }

  .calculator-strip .calculator {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.85rem;
  }

  .calculator-strip .calculator-result {
    padding: 0.85rem 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .calculator-strip .calculator-fields,
  .reading-column .calculator-fields,
  .reading-column [data-calculator="shelf_fit"] .calculator-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .table-note {
    display: block;
    margin-top: 0.8rem;
    color: var(--muted);
    font-size: 0.85rem;
  }

  .table-note + .table-region { margin-top: 0.3rem; }

  .reading-column [data-field="minClearance"] { grid-column: 1 / -1; }

  .article-meta { display: block; }
  .article-meta > * { margin-right: 0.35rem; }
  .article-meta > * + * { padding-left: 0; border: 0; }

  .reading-section h2 .section-number { font-size: 2.2rem; }

  .site-footer > span { padding-bottom: 0.35rem; }
}

@media print {
  .skip-link, .site-header nav, .contents, .calculator, .table-download,
  .table-note, .related, .site-footer nav { display: none; }

  .article-layout { display: block; }

  .reading-column { padding: 0; border: 0; }

  .table-region { overflow: visible; break-inside: avoid; }

  .table-region table { min-width: 0; table-layout: fixed; font-size: 9pt; }

  .table-region :is(th, td) { padding: 0.25rem 0.3rem; }

  .table-wide tbody td { height: 1.2cm; }
}