/* Niwot community guide — shared identity layer.
   Palette, page chrome, and the few graphic devices that repeat across pages.
   Content-specific styling stays inline in each page so it paints immediately.

   Two rules that are load-bearing and easy to lose in an edit:
   - clamp() needs whitespace around `+`. `1.6rem+2vw` is invalid and the
     browser silently drops the whole declaration, with no console warning.
   - border-radius is 0 everywhere in this design. No exceptions. */

:root {
  --n-white: #FAF8F2;
  --n-paper: #EEE7D9;
  --n-evergreen: #24483A;
  --n-forest: #17352B;
  --n-red: #B64F3A;
  --n-sage: #9EAD98;
  /* Sage is 4.31:1 on evergreen, so text on the dark grounds uses this
     lightened sage (5.7:1) instead. */
  --n-sage-lt: #B9C6B3;
  --n-sage-pale: #E2E8DE;
  --n-sky: #7FA9C2;
  /* Sky is 4.05:1 on evergreen, so link text on the dark grounds uses this
     lightened sky (5.9:1) instead. */
  --n-sky-lt: #A9CADD;
  --n-sky-pale: #E4EDF3;
  --n-gold: #C19A55;
  --n-ink: #252B27;
  /* Derived text-safe shades. The base red, sky and gold do not clear 4.5:1
     on every light ground in this palette, so small text uses these instead:
     --n-red-ink  4.68:1 on warm paper, 5.27:1 on soft white
     --n-sky-ink  4.6:1 on sage, 4.7:1 on paper, 5.6:1 on soft white
     The base --n-red stays for rails, rules and borders, where the minimum
     does not apply. */
  --n-red-ink: #A34531;
  --n-sky-ink: #35617D;
  --n-gold-lt: #D9B877;
  --n-rule: #D8D0BF;
  --n-muted: #5C6459;
  --n-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --n-sans: 'Instrument Sans', system-ui, -apple-system, sans-serif;
  --n-gutter: clamp(20px, 5vw, 76px);
  --n-max: 1440px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--n-white); color: var(--n-ink); font-family: var(--n-sans); font-size: 17px; line-height: 1.6; }
img { max-width: 100%; }
a { color: var(--n-ink); text-decoration-color: currentColor; }
a:hover { color: var(--n-red-ink); }
:where(a, button, input, select, textarea, summary):focus-visible { outline: 2px solid var(--n-red); outline-offset: 3px; }

.n-wrap { width: 100%; max-width: var(--n-max); margin-inline: auto; padding-inline: var(--n-gutter); }
.n-skip { position: fixed; z-index: 200; left: 16px; top: -64px; background: var(--n-forest); color: var(--n-white); padding: 12px 18px; text-decoration: none; }
.n-skip:focus { top: 12px; }

/* ---- sticky header ---- */
.n-head { position: sticky; top: 0; z-index: 100; background: var(--n-evergreen); border-bottom: 3px solid var(--n-red); }
.n-head-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 60px; }
.n-mark { font-family: var(--n-serif); font-size: 1.375rem; letter-spacing: .2em; color: var(--n-white); text-decoration: none; line-height: 1; }
.n-mark:hover { color: var(--n-gold-lt); }
.n-mark small { display: block; margin-top: 3px; font-family: var(--n-sans); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--n-sage-lt); }
.n-nav { display: flex; flex-wrap: wrap; gap: 4px 22px; align-items: center; }
.n-nav a { font-size: 12.5px; letter-spacing: .09em; text-transform: uppercase; color: var(--n-paper); text-decoration: none; padding: 6px 0; border-bottom: 2px solid transparent; transition: border-color .2s ease, color .2s ease; }
.n-nav a:hover { color: var(--n-white); border-bottom-color: var(--n-gold-lt); }
.n-nav a.n-on { color: var(--n-gold-lt); border-bottom-color: var(--n-gold-lt); }
.n-burger { display: none; width: 46px; height: 46px; padding: 11px 9px; background: transparent; border: 1px solid var(--n-sage); cursor: pointer; }
.n-burger span { display: block; height: 2px; background: var(--n-paper); margin: 0 0 5px; }
.n-burger span:last-child { margin-bottom: 0; }

@media (max-width: 1080px) {
  .n-burger { display: block; }
  .n-nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--n-gutter) 20px; background: var(--n-evergreen); border-bottom: 3px solid var(--n-red); }
  .n-head.n-open .n-nav { display: flex; }
  .n-nav a { font-size: 1.0625rem; letter-spacing: .06em; padding: 16px 0; border-bottom: 1px solid rgba(158, 173, 152, .35); }
  .n-nav a.n-on { border-bottom-color: var(--n-gold-lt); }
}

/* ---- section grounds ---- */
.n-bg-white { background: var(--n-white); }
.n-bg-paper { background: var(--n-paper); }
.n-bg-sage { background: #E2E8DE; }
.n-bg-sky { background: var(--n-sky-pale); }
.n-bg-green { background: var(--n-evergreen); color: var(--n-paper); }
.n-bg-green h1, .n-bg-green h2, .n-bg-green h3 { color: var(--n-white); }
.n-bg-green a { color: var(--n-white); }
.n-bg-green a:hover { color: var(--n-gold-lt); }
.n-pad { padding-block: clamp(44px, 6vw, 104px); }
.n-pad-sm { padding-block: clamp(28px, 4vw, 64px); }

/* ---- type ---- */
.n-display { font-family: var(--n-serif); font-weight: 400; letter-spacing: -.02em; line-height: .9; margin: 0; }
.n-h2 { font-family: var(--n-serif); font-weight: 400; font-size: clamp(1.875rem, 1.4rem + 1.7vw, 3.125rem); line-height: 1.02; letter-spacing: -.01em; margin: 0; }
.n-h3 { font-family: var(--n-serif); font-weight: 400; font-size: clamp(1.375rem, 1.15rem + .7vw, 1.875rem); line-height: 1.1; margin: 0; }
.n-lead { font-size: clamp(1.0625rem, 1rem + .35vw, 1.25rem); line-height: 1.55; color: var(--n-ink); }
.n-body { font-size: 1rem; line-height: 1.65; color: var(--n-ink); }
.n-small { font-size: .9375rem; line-height: 1.6; color: var(--n-muted); }
.n-label { font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--n-red-ink); }
.n-label--quiet { color: var(--n-muted); }
.n-bg-green .n-label { color: var(--n-gold-lt); }
.n-num { font-family: var(--n-serif); color: var(--n-red-ink); line-height: 1; }
.n-cap { font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--n-muted); margin: 10px 0 0; }
.n-bg-green .n-cap { color: var(--n-sage-lt); }
.n-bg-green .n-small { color: var(--n-sage-lt); }

/* ---- links & buttons ---- */
.n-link { color: var(--n-sky-ink); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 1px; }
.n-link:hover { color: var(--n-red-ink); }
.n-bg-green .n-link { color: var(--n-sky-lt); }
.n-btn { display: inline-block; padding: 15px 26px; background: var(--n-evergreen); color: var(--n-white); font-size: 13px; letter-spacing: .1em; text-transform: uppercase; text-decoration: none; border: 2px solid var(--n-evergreen); transition: background .2s ease, border-color .2s ease; }
.n-btn:hover { background: var(--n-red); border-color: var(--n-red); color: var(--n-white); }
.n-btn--ghost { background: transparent; color: var(--n-evergreen); }
.n-btn--ghost:hover { background: var(--n-evergreen); border-color: var(--n-evergreen); color: var(--n-white); }
.n-bg-green .n-btn { background: var(--n-white); color: var(--n-evergreen); border-color: var(--n-white); }
.n-bg-green .n-btn:hover { background: var(--n-gold-lt); border-color: var(--n-gold-lt); color: var(--n-forest); }
.n-bg-green .n-btn--ghost { background: transparent; color: var(--n-white); }
.n-btns { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---- railroad divider: two rails and ties, from the line that put Niwot here ---- */
.n-rail { height: 9px; border-top: 1px solid var(--n-evergreen); border-bottom: 1px solid var(--n-evergreen); background-image: repeating-linear-gradient(90deg, var(--n-evergreen) 0 2px, transparent 2px 12px); }
.n-rail--red { border-color: var(--n-red); background-image: repeating-linear-gradient(90deg, var(--n-red) 0 2px, transparent 2px 12px); }
.n-rail--light { border-color: var(--n-sage); background-image: repeating-linear-gradient(90deg, var(--n-sage) 0 2px, transparent 2px 12px); }
.n-hr { height: 1px; background: var(--n-rule); border: 0; margin: 0; }

/* section head: label, rule, title */
.n-shead { display: grid; gap: 14px; padding-bottom: 18px; border-bottom: 2px solid var(--n-evergreen); }
.n-shead-row { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: baseline; justify-content: space-between; }
.n-bg-green .n-shead { border-bottom-color: var(--n-sage); }

/* ---- grids ---- */
.n-g2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 3vw, 60px); align-items: start; }
.n-g2-wide { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 3vw, 60px); align-items: start; }
.n-g3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 2.5vw, 40px); }
.n-g4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(18px, 2vw, 32px); }
@media (max-width: 1000px) { .n-g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 900px) { .n-g2, .n-g2-wide, .n-g3 { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 620px) { .n-g4 { grid-template-columns: minmax(0, 1fr); } }

/* ---- footer ---- */
.n-foot { background: var(--n-forest); color: var(--n-paper); }
.n-foot a { color: var(--n-paper); text-decoration: none; font-size: 1rem; }
.n-foot a:hover { color: var(--n-gold-lt); }
.n-foot-cols { display: grid; grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 1fr)); gap: clamp(24px, 3vw, 52px); }
.n-foot-col { display: grid; gap: 12px; align-content: start; }
.n-foot h2 { font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--n-gold-lt); margin: 0; }
.n-foot-mark { font-family: var(--n-serif); font-size: clamp(2.5rem, 2rem + 2vw, 3.75rem); line-height: .9; letter-spacing: -.01em; color: var(--n-white); }
.n-disclaim { max-width: 78ch; font-size: .9375rem; line-height: 1.65; color: var(--n-sage); }
.n-foot-meta { display: flex; flex-wrap: wrap; gap: 8px 32px; font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--n-sage); }
@media (max-width: 900px) { .n-foot-cols { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }

/* ---- tap targets: keep every control comfortable on touch ---- */
@media (max-width: 1080px) {
  .n-link, .n-foot a { display: inline-block; padding-top: 12px; padding-bottom: 12px; }
  .n-foot-col { gap: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none; animation: none; }
}

/* Sticky header is ~63px, so in-page anchor targets need clearance or the
   heading lands behind it. */
[id] { scroll-margin-top: 80px; }

/* ---- list rows that shift on hover ----
   These were style-hover="padding-left:…" in the design prototypes; a :hover
   rule belongs in the stylesheet. */
.n-shift { transition: padding-left .2s ease; }
.n-shift:hover { padding-left: 8px; }
.n-shift--sm:hover { padding-left: 6px; }

/* ---- visually hidden, but read aloud ---- */
.n-sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ---- callout panels: 3px accent on the left edge only ---- */
.n-callout { padding: 22px; border-left: 3px solid var(--n-evergreen); }
.n-callout--paper { background: var(--n-paper); border-left-color: var(--n-red); }
.n-callout--sky { background: var(--n-sky-pale); border-left-color: var(--n-sky); }

/* ---- forms ---- */
.n-field { display: block; width: 100%; margin-top: 8px; padding: 13px 14px; background: var(--n-white); border: 2px solid var(--n-evergreen); font: inherit; font-size: 1rem; color: var(--n-ink); }
textarea.n-field { resize: vertical; }

/* ---- reading column ---- */
.n-read { max-width: 68ch; }