:root {
  /* Warm night shell shared with the homepage's Long Tail panorama. */
  --color-deep: #14110e;
  --color-on-deep-muted: #c9c0b4;
}
.skip-link {
  position: absolute;
  top: -8rem;
  left: 1rem;
  z-index: 100;
  padding: 1rem;
  background: var(--color-caffeine);
  color: var(--color-deep);
}
.skip-link:focus { top: 1rem; }
.content-page { background: var(--color-paper); }
body { overflow-wrap: anywhere; }
.home-nav { flex-wrap: wrap; gap: .5rem 1.5rem; padding-block: 1rem; }
.home-nav nav { max-width: 100%; flex-wrap: wrap; }
.hero-proof-caption { background: var(--color-caffeine); }
.hero-copy-title {
  max-width: 17ch;
  font-size: clamp(2.5rem, 1.65rem + 3.6vw, 4rem);
  line-height: 1.05;
}
.content-header, .content-footer {
  background: var(--color-deep);
  color: var(--color-on-deep);
}
.content-nav, .content-shell {
  width: min(100%, 76rem);
  margin-inline: auto;
  padding-left: max(1.25rem, env(safe-area-inset-left));
  padding-right: max(1.25rem, env(safe-area-inset-right));
}
.content-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem 1.5rem;
  padding-block: 1rem;
}
.content-brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  min-height: 2.75rem;
  font-weight: 700;
}
.content-brand img { border-radius: .5rem; }
.content-nav nav, .content-footer nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
}
.content-nav nav a, .content-footer nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
}
.content-footer { padding-block: 2rem; }
.content-footer p { margin-bottom: .75rem; }
.content-footer nav { font-size: .875rem; color: var(--color-on-deep-muted); }
.content-footer a:hover, .content-nav a:hover { text-decoration: underline; }
.article-shell {
  max-width: 74ch;
  padding-block: clamp(2.5rem, 6vw, 5rem);
  color: var(--color-ink);
}
.article-shell h1, .resource-section h2 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1.5rem + 3vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.03em;
  font-weight: 700;
  color: var(--color-deep);
  text-wrap: balance;
}
.article-shell h2 {
  margin-top: 2.5rem;
  margin-bottom: .8rem;
  color: var(--color-deep);
  font: 700 1.5rem/1.25 var(--font-display);
}
.article-shell p, .article-shell ul { margin-block: 1rem; line-height: 1.7; }
.article-shell .article-lede { font-size: 1.2rem; color: var(--color-ink-muted); }
.article-shell .article-byline { font-size: .875rem; color: var(--color-ink-muted); }
.article-shell a:not(.site-button), .resource-grid a {
  color: var(--color-sleep-text);
  text-decoration: underline;
  text-underline-offset: .2em;
}
.article-shell ul { padding-left: 1.5rem; list-style: disc; }
.article-shell li { margin-block: .6rem; }
.site-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: .8rem 1.2rem;
  border-radius: 2rem;
  background: var(--color-caffeine);
  color: var(--color-deep);
  font-weight: 700;
  line-height: 1.35;
  max-width: 100%;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.site-button:hover { background: var(--color-caffeine-hover); }
.site-button:active { background: var(--color-caffeine); }
.article-cta, .calculator {
  margin-block: 2rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--color-rule-cool);
  border-radius: 1rem;
  background: var(--color-surface-cool);
}
.article-cta h2 { margin-top: 0; }
.calculator legend { margin-bottom: 1.5rem; font-size: 1.25rem; font-weight: 700; }
.calculator-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.calculator-field { display: flex; flex-direction: column; gap: .5rem; min-width: 0; }
.calculator label { font-weight: 600; }
.calculator .field-help { margin: 0; }
.calculator button { margin-top: 1.5rem; }
.calculator input, .calculator select {
  width: 100%;
  min-width: 0;
  min-height: 3rem;
  padding: .65rem .75rem;
  border: 1px solid var(--color-ink-muted);
  border-radius: .5rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-weight: 400;
  caret-color: var(--color-sleep-text);
}
.calculator input[aria-invalid="true"] { border-width: 2px; }
.calculator fieldset:disabled { opacity: .65; }
.calculator fieldset:disabled .site-button { cursor: not-allowed; }
.article-shell .field-help { color: var(--color-ink-muted); font-size: .875rem; }
.estimate-panel {
  padding: 1.5rem;
  border: 1px solid var(--color-rule-cool);
  border-radius: 1rem;
  background: var(--color-surface);
}
.estimate-panel h2 { margin-top: 0; font-size: 1.125rem; }
.estimate-panel .estimate-number {
  margin-block: .5rem;
  color: var(--color-sleep-text);
  font: 700 clamp(2rem, 6vw, 3rem)/1.2 var(--font-display);
}
.estimate-error, .estimate-notice { border: 1px solid var(--color-ink-muted); padding: 1rem; }
.estimate-error:focus, .estimate-panel:focus { outline: 3px solid var(--color-sleep); outline-offset: 4px; }
.formula { padding: 1rem; background: var(--color-surface); overflow-wrap: anywhere; }
.table-scroll { overflow-x: auto; margin-block: 1.5rem; }
.article-shell table { width: 100%; font-variant-numeric: tabular-nums; }
.article-shell caption { text-align: left; font-weight: 700; margin-bottom: .75rem; }
.article-shell th, .article-shell td {
  padding: .8rem;
  text-align: left;
  border-bottom: 1px solid var(--color-rule);
}
.article-shell th { background: var(--color-surface-cool); }
.resource-section { padding-block: clamp(3rem, 6vw, 5rem); background: var(--color-paper); }
.resource-section h2 { max-width: 24ch; }
.resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; margin-top: 2rem; }
.resource-grid article { padding-top: 1.25rem; border-top: 2px solid var(--color-rule-cool); }
.resource-grid h3 { margin-bottom: .8rem; font: 700 1.35rem/1.3 var(--font-display); }
.resource-grid p { color: var(--color-ink-muted); line-height: 1.6; }
.download-options { display: flex; flex-wrap: wrap; gap: 1rem; margin-block: 2rem; }
.download-handoff { padding: 1rem; background: var(--color-surface-cool); border-radius: .5rem; }
.download-handoff p { margin-top: 0; }
.download-handoff a, .download-handoff button { display: inline-flex; align-items: center; min-height: 2.75rem; }
.download-handoff button { padding: .5rem; text-decoration: underline; cursor: pointer; }
.content-header a:focus-visible, .content-footer a:focus-visible { outline: 3px solid var(--color-caffeine); outline-offset: 4px; }
.article-shell :focus-visible, .resource-section a:focus-visible { outline: 3px solid var(--color-sleep); outline-offset: 4px; }
@media (max-width: 48rem) {
  .resource-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}
@media (max-width: 32rem) {
  .calculator-fields { grid-template-columns: 1fr; }
  .content-nav nav { gap: .5rem 1rem; font-size: .875rem; }
  .calculator .site-button { width: 100%; }
  .article-cta, .calculator, .estimate-panel { padding: 1rem; }
  .article-shell th, .article-shell td { padding: .6rem .4rem; }
}