/* Harbor Notes — local system fonts; no external dependencies. */
:root {
  color-scheme: light;
  --paper: #f7f5ee;
  --ink: #242e2b;
  --muted: #57615c;
  --accent: #315c4d;
  --line: #d4d7cb;
  --wash: #eceee5;
  --serif: Charter, 'Bitstream Charter', 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --sans: 'Avenir Next', Avenir, 'Segoe UI', sans-serif;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
}
* { box-sizing: border-box; }
html { font-size: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.65; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 1px; }
::selection { background: #dce5d6; color: var(--ink); }
.skip-link { position: absolute; top: .5rem; left: 1rem; padding: .6rem 1rem; background: var(--paper); transform: translateY(-200%); z-index: 2; }
.skip-link:focus { transform: none; }
.shell { width: min(100% - 4rem, 70rem); margin-inline: auto; }
.masthead { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding-block: 1.55rem; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; align-items: center; gap: .8rem; min-height: 44px; color: var(--ink); text-decoration: none; font-family: var(--serif); font-size: 1.55rem; letter-spacing: -.035em; }
.mark { width: 1.25rem; height: 1.25rem; border: 1px solid var(--accent); border-radius: 50%; position: relative; }
.mark::after { content: ''; position: absolute; inset: 50% -4px auto; border-top: 1px solid var(--accent); }
.masthead nav { display: flex; gap: 1.5rem; }
.masthead nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: .85rem; color: var(--ink); }
.eyebrow, .number, .label { font-family: var(--mono); font-size: .72rem; font-weight: 400; letter-spacing: .09em; text-transform: uppercase; }
.eyebrow { color: var(--accent); margin: 0 0 1.5rem; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.12; }
h1 { font-size: clamp(3rem, 6.6vw, 5.5rem); letter-spacing: -.055em; margin-bottom: 1.5rem; }
h2 { font-size: 2rem; letter-spacing: -.025em; }
h3 { font-size: 1.5rem; letter-spacing: -.015em; }
p { margin-bottom: 1.25rem; }
.intro { display: grid; grid-template-columns: minmax(0, 1fr) 16rem; gap: 5rem; align-items: end; padding-block: 5.5rem 4.5rem; }
.intro h1 { max-width: 13ch; }
.dek { font-size: 1.125rem; max-width: 44ch; color: var(--muted); }
.intro .dek { margin-bottom: 0; }
.margin-note { border-top: 1px solid var(--line); padding-top: 1rem; color: var(--muted); font-size: .9rem; }
.margin-note .label { display: block; margin-bottom: .8rem; color: var(--ink); }
.margin-note p:last-child { margin-bottom: 0; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; padding-block: .9rem; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.section-heading h2 { font-family: var(--sans); font-size: .88rem; font-weight: 600; letter-spacing: 0; margin: 0; }
.section-heading span { color: var(--muted); }
.note-row { display: grid; grid-template-columns: 4rem minmax(0, 1fr) 10rem; gap: 1.5rem; padding-block: 2rem; border-bottom: 1px solid var(--line); }
.note-row .number { color: var(--muted); padding-top: .5rem; }
.note-row h3 { margin-bottom: .7rem; font-size: clamp(1.65rem, 3vw, 2rem); }
.note-row h3 a { display: inline-block; min-height: 44px; color: var(--ink); text-decoration: none; }
.note-row h3 a:hover { color: var(--accent); text-decoration: underline; }
.note-row p { max-width: 54ch; color: var(--muted); margin: 0; }
.topic { font-size: .8rem; color: var(--muted); padding-top: .5rem; text-align: right; }
.about { display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; padding-block: 4rem; }
.about h2 { font-size: 1.6rem; }
.about p { max-width: 57ch; color: var(--muted); margin-bottom: 0; }
.site-footer { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; border-top: 1px solid var(--line); padding-block: 1.5rem 2rem; color: var(--muted); font-size: .8rem; }
.site-footer p { margin: 0; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.article-layout { display: grid; grid-template-columns: 12rem minmax(0, 43rem); gap: 4rem; padding-block: 3.5rem 5rem; }
.article-aside { font-size: .82rem; color: var(--muted); }
.back-link { display: inline-flex; align-items: center; min-height: 44px; margin-bottom: 2rem; }
.article-aside .label { display: block; margin-bottom: .6rem; }
.article-aside ol { list-style: none; padding: 0; margin: 0; }
.article-aside li { margin-bottom: .35rem; }
.article-aside li a { display: inline-flex; align-items: center; min-height: 44px; }
.article-header { padding-block: .7rem 1.5rem; border-bottom: 1px solid var(--line); margin-bottom: 2.5rem; }
.article-header h1 { font-size: clamp(2.75rem, 5.2vw, 4.35rem); max-width: 17ch; }
.article-header .dek { max-width: none; font-size: 1.2rem; margin-bottom: 0; }
.prose { font-family: var(--serif); font-size: 1.17rem; line-height: 1.8; }
.prose section { margin-top: 2.75rem; scroll-margin-top: 2rem; }
.prose h2 { font-size: 1.85rem; margin-bottom: 1rem; }
.prose h3 { margin-top: 2rem; font-size: 1.4rem; }
.prose ul, .prose ol { padding-left: 1.4rem; margin-block: 0 1.5rem; }
.prose li { padding-left: .25rem; margin-bottom: .6rem; }
.prose strong { font-weight: 700; }
code { font-family: var(--mono); font-size: .8em; overflow-wrap: anywhere; }
pre { padding: 1.2rem 1.4rem; border: 1px solid var(--line); background: var(--wash); overflow-x: auto; line-height: 1.7; }
pre code { overflow-wrap: normal; font-size: .83rem; }
.takeaway { padding: 1.4rem 1.5rem; margin-block: 2rem; background: var(--wash); font-family: var(--sans); font-size: .98rem; line-height: 1.7; }
.takeaway p:last-child { margin-bottom: 0; }
.next-note { display: block; margin-top: 3rem; padding-block: 1.5rem; border-top: 1px solid var(--line); font-family: var(--sans); font-size: .95rem; }
.not-found { max-width: 43rem; padding-block: 6rem; }
.not-found h1 { font-size: clamp(3rem, 7vw, 5rem); }
.not-found ul { list-style: none; padding: 0; }
.not-found li a { display: inline-flex; align-items: center; min-height: 44px; }
@media (max-width: 850px) {
  .intro { grid-template-columns: 1fr; gap: 2.5rem; padding-block: 3.5rem; }
  .intro h1 { max-width: 15ch; }
  .margin-note { max-width: 32rem; }
  .article-layout { grid-template-columns: 1fr; gap: 1.5rem; padding-block: 2rem 3rem; }
  .article-aside .contents { display: none; }
  .back-link { margin-bottom: 0; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 2.5rem, 70rem); }
  .masthead { gap: .75rem; padding-block: 1rem; }
  .wordmark { font-size: 1.3rem; gap: .55rem; }
  .masthead nav { gap: 1rem; }
  .masthead nav a { font-size: .78rem; }
  .mark { width: 1rem; height: 1rem; }
  .intro { padding-block: 3rem; }
  .note-row { grid-template-columns: 2rem minmax(0, 1fr); gap: .8rem; padding-block: 1.5rem; }
  .topic { grid-column: 2; text-align: left; padding-top: 0; }
  .about { grid-template-columns: 1fr; gap: .5rem; padding-block: 2.5rem; }
  .site-footer { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .prose { font-size: 1.1rem; }
  pre { padding: 1rem; }
  .not-found { padding-block: 3.5rem; }
}
@media print {
  body { background: white; color: black; font-size: 12pt; }
  .shell { width: 100%; }
  .skip-link, .masthead nav, .article-aside, .next-note, .site-footer { display: none; }
  .masthead { padding-block: 0 1rem; }
  .article-layout { display: block; padding-block: 1.5rem; }
  .article-header h1 { font-size: 32pt; }
  .prose { font-size: 12pt; }
  h2, h3 { break-after: avoid; }
  pre, .takeaway { break-inside: avoid; }
  a { color: black; }
}