/* ============================================================================
   Pango — shared site theme. Loaded by both index.html and docs.html so the
   landing page and the documentation are one design system rather than two
   that drift.

   Direction: "field record". This is software about evidence — condition
   reports, ledgers, what was there on the day. So the page is built like a
   well-set document: warm paper, serif prose, mono for anything measured, a
   hairline grid, and section numbers in the margin. Orange is the one loud
   thing and it is spent deliberately.

   Nothing here fetches. No CDN, no web fonts, no analytics — the same rule the
   product is built to. The display face is `ui-serif`, which resolves to a real
   typeface on every modern OS and costs zero bytes.
   ========================================================================= */

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

:root {
  /* Warm paper. The app's own light theme is #faf8f5; the site sits beside it. */
  --paper:     #FBF9F6;
  --paper-2:   #F3EEE7;
  --card:      #FFFFFF;
  --card-2:    #FAF7F2;

  --ink:       #1A1613;
  --ink-2:     #574F45;
  --ink-3:     #8C8378;

  --rule:      rgba(26, 22, 19, .13);
  --rule-2:    rgba(26, 22, 19, .22);
  --chip:      rgba(26, 22, 19, .05);

  --accent:      #FF7A29;
  /* Darkened for text on paper — #FF7A29 on white is 2.4:1 and fails. */
  --accent-ink:  #B2470A;
  --accent-tint: rgba(255, 122, 41, .11);
  --accent-line: rgba(255, 122, 41, .34);

  --good:      #1F7A5C;
  --warn:      #B4790B;
  --warn-tint: rgba(224, 156, 22, .13);
  --bad:       #C0392B;

  --code-bg:   #17140F;
  --code-ink:  #EDE7DC;

  --display: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino,
             "Book Antiqua", Georgia, serif;
  --sans:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
             "Helvetica Neue", Arial, sans-serif;
  --mono:    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --max:    1140px;
  --narrow: 720px;
  --r-sm:   8px;
  --r:      14px;
  --r-lg:   22px;

  --shadow-1: 0 1px 2px rgba(26,22,19,.05), 0 2px 8px rgba(26,22,19,.04);
  --shadow-2: 0 2px 6px rgba(26,22,19,.06), 0 12px 34px -12px rgba(26,22,19,.20);
  --shadow-3: 0 30px 70px -30px rgba(26,22,19,.42), 0 2px 8px rgba(26,22,19,.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:   #0E0C0A;
    --paper-2: #15120F;
    --card:    #191512;
    --card-2:  #1F1A16;

    --ink:     #F6F1E8;
    --ink-2:   #BCB2A4;
    --ink-3:   #877E72;

    --rule:    rgba(255, 246, 233, .11);
    --rule-2:  rgba(255, 246, 233, .19);
    --chip:    rgba(255, 246, 233, .06);

    --accent:      #FF8F4D;
    --accent-ink:  #FFA870;
    --accent-tint: rgba(255, 143, 77, .13);
    --accent-line: rgba(255, 143, 77, .32);

    --good:      #4FBE95;
    --warn:      #E0A93A;
    --warn-tint: rgba(224, 169, 58, .13);
    --bad:       #E8705F;

    --code-bg:   #0A0806;
    --code-ink:  #E7E0D4;

    --shadow-1: 0 1px 2px rgba(0,0,0,.5);
    --shadow-2: 0 2px 6px rgba(0,0,0,.45), 0 14px 36px -14px rgba(0,0,0,.7);
    --shadow-3: 0 30px 70px -28px rgba(0,0,0,.85), 0 2px 8px rgba(0,0,0,.5);
  }
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--display);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Paper grain + a warm bloom top-right. Subtle enough to read as stock, not
   as decoration. The SVG is inline so the rule about fetching nothing holds. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 520px at 88% -8%, var(--accent-tint), transparent 62%),
    var(--paper);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }
::selection { background: var(--accent); color: #fff; }

.wrap   { max-width: var(--max);    margin: 0 auto; padding: 0 26px; }
.narrow { max-width: var(--narrow); }

/* ── Type scale ──────────────────────────────────────────────────────────── */

h1, h2, h3, h4 { font-family: var(--display); font-weight: 600; letter-spacing: -.02em; }

/* Capped at 62px, not larger: the hero headline runs to four lines above that on
   a 1280-wide laptop and pushes the call to action under the fold. */
.display {
  font-size: clamp(36px, 4.9vw, 62px);
  line-height: 1.06;
  letter-spacing: -.032em;
  font-weight: 600;
  margin: 0;
}
.display em {
  font-style: italic;
  color: var(--accent-ink);
}

.lede {
  font-size: clamp(19px, 2.1vw, 23px);
  line-height: 1.5;
  color: var(--ink-2);
  margin: 22px 0 0;
  max-width: 42ch;
}

.prose { color: var(--ink-2); font-size: 17px; }
.prose strong { color: var(--ink); font-weight: 600; }

/* Mono micro-label — the annotation voice, used for section numbers, captions,
   table headers, anything measured. */
.label {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}

/* ── Section furniture ───────────────────────────────────────────────────── */

/* The header is sticky, so an anchor jump would otherwise park the heading
   underneath it. */
:target, [id] { scroll-margin-top: 92px; }

.section { padding: clamp(56px, 8vw, 104px) 0; }
.section-head { margin-bottom: 44px; }
.section-head .label { display: block; margin-bottom: 16px; }
.section-head .label::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 12px;
}
.section h2 {
  font-size: clamp(29px, 4.1vw, 44px);
  line-height: 1.1;
  margin: 0;
  max-width: 20ch;
}
.section-head p {
  color: var(--ink-2);
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 18px;
}

hr.rule { border: none; border-top: 1px solid var(--rule); margin: 0; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */

.btn {
  font-family: var(--sans);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .16s cubic-bezier(.2,.8,.3,1), box-shadow .22s, background .18s, border-color .18s, color .18s;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.btn-primary {
  background: var(--accent);
  color: #2A1104;
  box-shadow: 0 10px 26px -10px rgba(255,122,41,.75);
}
.btn-primary:hover { box-shadow: 0 16px 34px -12px rgba(255,122,41,.85); }

.btn-ghost {
  background: transparent;
  border-color: var(--rule-2);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-ink); }

.arrow { transition: transform .18s cubic-bezier(.2,.8,.3,1); }
.btn:hover .arrow, .textlink:hover .arrow { transform: translateX(3px); }

.textlink {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.textlink:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ── Header ──────────────────────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: saturate(1.6) blur(14px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-bottom: 1px solid var(--rule);
}
.nav { display: flex; align-items: center; gap: 20px; height: 68px; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 21px;
  letter-spacing: -.03em;
}
.brand .tile {
  width: 34px; height: 34px;
  border-radius: 10px;
  overflow: hidden;
  flex: none;
  box-shadow: var(--shadow-1);
}
.brand .tile img { width: 100%; height: 100%; object-fit: contain; display: block; }
.brand .go { color: var(--accent); }

.nav-spacer { flex: 1; }
.nav-links { display: flex; align-items: center; gap: 26px; font-family: var(--sans); }
.nav-links a {
  color: var(--ink-2);
  font-size: 14.5px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s cubic-bezier(.2,.8,.3,1);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }
/* GitHub: the mark carries the link on its own, so the anchor is sized by the
   glyph rather than by a word. It keeps the same colour and underline-on-hover
   as its lettered neighbours. */
.nav-links a.gh { display: inline-flex; align-items: center;
  /* 1.62em is the inherited line box the lettered links stand on. Without it
     the anchor shrinks to the glyph and its hover underline rides ~5px above
     theirs. */
  min-height: calc(1.62em + 8px); }
.nav-links a.gh svg { display: block; }@media (max-width: 900px) { .nav-links { display: none; } }

/* ── Cards ───────────────────────────────────────────────────────────────── */

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 30px;
  box-shadow: var(--shadow-1);
  transition: transform .22s cubic-bezier(.2,.8,.3,1), box-shadow .22s, border-color .22s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); border-color: var(--accent-line); }
.card h3 { font-size: 21px; margin: 0 0 10px; }
.card p  { color: var(--ink-2); margin: 0; font-size: 16px; }

code, .mono { font-family: var(--mono); }
:not(pre) > code {
  font-size: .85em;
  background: var(--chip);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--ink);
}

/* ── Status note ─────────────────────────────────────────────────────────── */

.note {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--warn);
  background: var(--warn-tint);
  border-radius: 0 var(--r) var(--r) 0;
  padding: 20px 24px;
}
.note b { display: block; font-size: 17px; margin-bottom: 6px; }
.note p { margin: 0; color: var(--ink-2); font-size: 15.5px; max-width: 72ch; }
.note a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* ── Screenshot frame ────────────────────────────────────────────────────── */

.shot {
  border-radius: var(--r);
  border: 1px solid var(--rule-2);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow-3);
}
/* height:auto is load-bearing — the <img> carries width/height attributes so the
   browser can reserve space before load, and without this the literal height
   attribute wins over the fluid width. */
.shot img { display: block; width: 100%; height: auto; }
.shot-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 15px;
  border-bottom: 1px solid var(--rule);
  background: var(--card-2);
}
.shot-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--rule-2); display: block; }
.shot-bar span {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
}
figure { margin: 0; }
figcaption {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink-3);
  margin-top: 14px;
  line-height: 1.5;
}
figcaption b { color: var(--ink-2); font-weight: 600; }

/* ── Code block ──────────────────────────────────────────────────────────── */

.codeblock {
  background: var(--code-bg);
  border: 1px solid var(--rule-2);
  border-radius: var(--r);
  overflow: hidden;
}
.codeblock .bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255,255,255,.09);
}
.codeblock .bar i { width: 10px; height: 10px; border-radius: 50%; background: #38312A; display: block; }
.codeblock .bar span { margin-left: auto; font-family: var(--mono); font-size: 12px; color: #8B8177; }
.codeblock pre {
  margin: 0;
  padding: 20px 22px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--code-ink);
}
.codeblock .c { color: #7E7469; }
.codeblock .k { color: var(--accent); }

/* ── Illustrations ───────────────────────────────────────────────────────── */

.illus { display: block; width: 100%; height: auto; overflow: visible; }
.illus .st  { stroke: var(--ink); }          /* structure  */
.illus .sf  { stroke: var(--ink-3); }        /* faint      */
.illus .ac  { stroke: var(--accent); }       /* accent     */
.illus .fa  { fill: var(--accent); }
.illus .fc  { fill: var(--card); }
.illus .fp  { fill: var(--paper-2); }
.illus .ft  { fill: var(--accent-tint); }
.illus text { font-family: var(--mono); fill: var(--ink-3); }

/* ── Footer ──────────────────────────────────────────────────────────────── */

.site-footer { border-top: 1px solid var(--rule); padding: 52px 0 60px; margin-top: 40px; }
.foot { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; justify-content: space-between; }
.foot .left { display: flex; align-items: center; gap: 11px; color: var(--ink-2); font-size: 15px; }
.foot .left img { width: 20px; height: 20px; border-radius: 5px; display: block; }
.foot .links { display: flex; gap: 24px; flex-wrap: wrap; font-family: var(--sans); }
.foot .links a { color: var(--ink-2); font-size: 14.5px; }
.foot .links a:hover { color: var(--accent-ink); }
.foot-note {
  color: var(--ink-3);
  font-size: 13.5px;
  margin-top: 26px;
  max-width: 78ch;
  font-family: var(--sans);
  line-height: 1.6;
}
/* The global `:not(pre) > code { font-size: .85em }` rule takes this below the
   12px floor (13.5 * .85 = 11.475) — these are read, not decorative. */
.foot-note code { font-size: 1em; }

/* ── Reveal on scroll ────────────────────────────────────────────────────── */

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.3,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }