/* Kata site, shared layer.
   Leaf design system: warm paper, flame accent, hairlines, no shadows, square
   components. Chips are the one rounded thing. Fonts are Kata's own.
   Page-specific rules live in each page's <style>. Nothing here is page-aware. */

:root {
  --paper:       #FDFBF7;                 /* page */
  --paper-2:     #F7F3EC;                 /* soft panel */
  --card:        #FFFFFF;
  --code-bg:     #1E1714;                 /* code stays warm-dark */
  --code-line:   #3D3330;
  --code-text:   #D6CCC2;
  --line:        rgba(25, 18, 7, .08);
  --line-strong: rgba(25, 18, 7, .14);
  --text:        #3C3C43;
  --text-2:      #67676C;
  /* was #929295, a value read off the docs theme. 3.0:1 on paper, under AA at
     every size, and it carried the footer and all small print. Warm neutral at 5.04:1. */
  --text-3:      #706C67;
  --mono-muted:  #6A737D;
  --shu:         #D4652E;                 /* Leaf flame, keeps its Kata name */
  --shu-hover:   #BE4A1F;
  --shu-soft:    #F5B731;
  --tint:        rgba(212, 101, 46, .07);
  --tint-border: rgba(212, 101, 46, .16);
  --jade:        #299764;
  --jade-soft:   rgba(16, 185, 129, .14);
  --red:         #B8272C;
  --red-soft:    rgba(244, 63, 94, .10);
  --term-green:  #4FBF8B;                 /* prompt green on dark code */

  --display: "Instrument Serif", Georgia, serif;
  --sans:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --r-pill: 999px;
  --container: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper); color: var(--text);
  font-family: var(--sans); line-height: 1.6;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
.wrap { max-width: var(--container); margin: 0 auto; padding: 0 28px; }
::selection { background: var(--shu); color: #fff; }
:focus-visible { outline: 2px solid var(--shu); outline-offset: 3px; }

/* ---------- type ---------- */
h1, h2, h3 { font-family: var(--display); font-weight: 400; letter-spacing: -.015em; line-height: 1.04; text-wrap: balance; color: var(--text); }
h1 { font-size: clamp(3.2rem, 8vw, 6.4rem); }
h2 { font-size: clamp(2.4rem, 5.2vw, 4rem); }
h3 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
.em { font-style: italic; color: var(--shu); }
.ln { display: block; text-wrap: balance; }
.lede { font-size: 1.18rem; color: var(--text-2); max-width: 56ch; line-height: 1.7; text-wrap: pretty; }
.hero .lede, .sec-head .lede, .final .lede { text-wrap: balance; }
.kicker {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .04em;
  color: var(--mono-muted); margin-bottom: 22px;
}
.kicker::before { content: "// "; color: var(--shu); }
code { font-family: var(--mono); font-size: .88em; color: var(--shu); }

/* ---------- nav ---------- */
nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(253, 251, 247, .85); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-in { max-width: var(--container); margin: 0 auto; padding: 16px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--text); }
.brand-mark {
  width: 32px; height: 32px; border-radius: 0; background: var(--shu);
  display: grid; place-items: center; font-family: var(--display); font-size: 1.15rem; color: #fff;
}
.brand-name { font-family: var(--display); font-size: 1.5rem; letter-spacing: -.01em; }
.brand-host { font-family: var(--mono); font-size: .68rem; color: var(--text-3); letter-spacing: .06em; }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { color: var(--text-2); text-decoration: none; font-size: .92rem; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-links a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--shu); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 24px; border-radius: 0; border: 1px solid transparent;
  background: var(--shu); color: #fff; font-family: var(--sans);
  font-size: .95rem; font-weight: 600; text-decoration: none; cursor: pointer;
  transition: background .16s ease, border-color .16s ease;
}
.btn:hover { background: var(--shu-hover); }
.btn--ghost { background: transparent; border-color: var(--line-strong); color: var(--text); }
.btn--ghost:hover { background: var(--tint); border-color: var(--tint-border); }
.btn--lg { padding: 17px 34px; font-size: 1.02rem; }
.btn svg { width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- hero ---------- */
.hero { padding: 96px 0 72px; text-align: center; }
.hero h1 { max-width: 16ch; margin: 0 auto; }
.hero .lede { margin: 32px auto 0; text-align: center; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 40px; }
.hero-note { margin-top: 20px; font-size: .82rem; color: var(--mono-muted); font-family: var(--mono); }

/* subpage hero: left aligned, shorter, no CTA row */
.pagehead { padding: 72px 0 60px; }
.pagehead h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); max-width: 18ch; margin: 0; }
.pagehead .lede { margin-top: 26px; }

/* ---------- sections ---------- */
section { padding: 110px 0; border-top: 1px solid var(--line); }
.sec-head { margin-bottom: 60px; }
/* columns mirror the two-column lists below (1fr 1fr, same gap), and both
   sides start at the top so a short headline never opens a hole */
.sec-head:not(.center) { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 22px; align-items: start; }
.sec-head:not(.center) .kicker { grid-column: 1 / -1; margin-bottom: 0; }
.sec-head:not(.center) h2 { max-width: 15ch; }
.sec-head:not(.center) .lede { margin: 0; }
.sec-head.center { text-align: center; }
.sec-head.center h2 { max-width: 19ch; margin-inline: auto; }
.sec-head.center .lede { margin: 22px auto 0; }

/* ---------- panel: the one bordered surface ---------- */
.panel { background: var(--card); border: 1px solid var(--line); padding: 26px; }
.panel--quiet { background: var(--paper-2); }
.panel--tint { background: var(--tint); border-color: var(--tint-border); }
.panel--strong { border-color: var(--line-strong); }
.panel h4 { font-family: var(--sans); font-size: 1.02rem; font-weight: 600; }
.panel p { font-size: .93rem; color: var(--text-2); margin-top: 8px; text-wrap: pretty; }

/* accent rule used under mono labels, the system's numbered-section mark */
.rule::after {
  content: ""; display: block; width: 40px; height: 4px; margin-top: 12px;
  border-radius: var(--r-pill); background: var(--shu); opacity: .8;
}
.label {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .06em;
  color: var(--mono-muted); line-height: 1;
}

/* ---------- badge ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: .66rem; letter-spacing: .04em;
  padding: 3px 9px; border-radius: var(--r-pill);
  border: 1px solid var(--line-strong); background: var(--card); color: var(--mono-muted);
  white-space: nowrap;
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: none; }
.badge--measured { color: var(--jade); border-color: rgba(41,151,100,.35); background: var(--jade-soft); }
.badge--inferred { color: #8A6A1E; border-color: rgba(245,183,49,.45); background: rgba(245,183,49,.14); }
.badge--guessed  { color: var(--red); border-color: rgba(184,39,44,.3); background: var(--red-soft); }
.badge--open     { color: var(--shu); border-color: var(--tint-border); background: var(--tint); }
.badge--plain::before { display: none; }

/* ---------- code surface ---------- */
.code {
  background: var(--code-bg); border: 1px solid var(--code-line);
  font-family: var(--mono); font-size: .8rem; color: var(--code-text);
  line-height: 1.65;
}
.code-bar {
  padding: 10px 16px; border-bottom: 1px solid var(--code-line);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-size: .72rem; color: #8B8078; letter-spacing: .04em;
}
.code pre { padding: 18px 20px; overflow-x: auto; }
.code .k { color: var(--shu-soft); }        /* key */
.code .s { color: #B6C9A8; }                /* string */
.code .n { color: #C9A3E0; }                /* number, literal */
.code .c { color: #7A6E66; }                /* comment */
.code .g { color: var(--term-green); }      /* prompt, ok */
.code .r { color: #E8836B; }                /* flagged */

/* ---------- tabs ---------- */
.tabs { display: flex; gap: 0; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.tab {
  appearance: none; background: none; border: none; cursor: pointer;
  font-family: var(--mono); font-size: .78rem; color: var(--mono-muted);
  padding: 12px 18px; border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: color .15s ease, border-color .15s ease;
}
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--shu); }

/* ---------- picker: clickable list beside a detail pane ---------- */
.picker { display: flex; flex-direction: column; border: 1px solid var(--line); background: var(--card); }
.pick {
  appearance: none; background: none; border: none; border-bottom: 1px solid var(--line);
  text-align: left; cursor: pointer; padding: 13px 16px; font-family: var(--sans);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  color: var(--text-2); font-size: .9rem; transition: background .14s ease, color .14s ease;
}
.pick:last-child { border-bottom: none; }
.pick:hover { background: var(--paper-2); color: var(--text); }
.pick[aria-selected="true"] { background: var(--tint); color: var(--text); font-weight: 600; box-shadow: inset 3px 0 0 var(--shu); }
.pick i { font-family: var(--mono); font-style: normal; font-size: .72rem; color: var(--mono-muted); }
.pick[aria-selected="true"] i { color: var(--shu); }

/* ---------- key/value rows ---------- */
.kv { display: grid; gap: 0; }
.kv-row {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, auto); gap: 16px;
  align-items: center; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .9rem;
}
/* values here can be file paths, which have no spaces to break on */
.kv-row > * { min-width: 0; overflow-wrap: anywhere; }
.kv-row:last-child { border-bottom: none; }
.kv-row b { font-weight: 500; color: var(--text); }
.kv-row span { color: var(--text-2); }

/* ---------- swatch strip ---------- */
.swatches { display: flex; height: 72px; border: 1px solid var(--line-strong); }
.swatches i { flex: 1; position: relative; }
.swatches i span {
  position: absolute; inset: auto 0 8px 0; text-align: center;
  font-family: var(--mono); font-size: .58rem; letter-spacing: .02em; opacity: 0;
  transition: opacity .15s ease;
}
.swatches:hover i span { opacity: .85; }

/* ---------- registry bar ----------
   Used by generated system pages. systems/alewa.html carries its own scoped copy,
   because that page renders in Alewa's language and must not load this file. */
.kbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(253, 251, 247, .92); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-strong);
}
.kbar-in {
  max-width: 1180px; margin: 0 auto; padding: 8px 28px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.kbar-brand { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--text); }
.kbar-mark {
  width: 26px; height: 26px; background: var(--shu); color: #fff;
  display: grid; place-items: center; font-family: var(--display); font-size: .98rem;
}
.kbar-brand span:last-child { font-family: var(--display); font-size: 1.2rem; letter-spacing: -.01em; }
.kbar-sep { color: var(--mono-muted); font-family: var(--mono); font-size: .82rem; }
.kbar-name { font-family: var(--mono); font-size: .84rem; color: var(--text); }
.kbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.kbar-cmd {
  display: inline-flex; align-items: center; gap: 12px; cursor: pointer;
  background: var(--card); border: 1px solid var(--line); padding: 8px 12px; color: var(--text-2);
}
.kbar-cmd code { font-family: var(--mono); font-size: .76rem; color: var(--text); white-space: nowrap; }
.kbar-cmd b { font-family: var(--mono); font-size: .68rem; font-weight: 400; color: var(--shu); }
.kbar-cmd:hover { border-color: var(--line-strong); }
.kbar-btn {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
  background: var(--shu); color: #fff; border: 1px solid transparent;
  padding: 9px 16px; font-size: .85rem; font-weight: 600; cursor: pointer;
  font-family: var(--sans); transition: background .16s ease;
}
.kbar-btn:hover { background: var(--shu-hover); }
.kbar-btn svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.kstrip { background: var(--tint); border-bottom: 1px solid var(--line); font-size: .88rem; color: var(--text-2); }
.kstrip div { max-width: 1180px; margin: 0 auto; padding: 13px 28px; text-wrap: pretty; }
.kstrip b { color: var(--text); font-weight: 600; }
@media (max-width: 900px) {
  .kbar-in { padding: 8px 20px; }
  .kbar-cmd, .kbar-sep, .kbar-name, .kbar .badge { display: none; }
  .kstrip div { padding: 12px 20px; }
}

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 48px 0; }
.foot { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; align-items: center; }
.foot p { font-size: .86rem; color: var(--text-3); }
.foot a { color: var(--text-2); text-decoration: none; font-size: .88rem; margin-left: 22px; }
.foot a.brand { margin: 0; }
.foot a:hover { color: var(--text); }

/* ---------- responsive, shared only ---------- */
@media (max-width: 940px) {
  .nav-links { display: none; }
  section { padding: 76px 0; }
  .hero { padding: 72px 0 56px; }
  .pagehead { padding: 56px 0 44px; }
  .sec-head:not(.center) { grid-template-columns: 1fr; gap: 18px; }
  .sec-head:not(.center) h2 { max-width: 100%; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .nav-in { padding: 12px 20px; }
  nav .btn { padding: 10px 16px; font-size: .85rem; }
  h1 { font-size: clamp(2.6rem, 12.5vw, 3.2rem); }
  h2 { font-size: clamp(1.9rem, 8.5vw, 2.4rem); }
  h3 { font-size: 1.4rem; }
  .lede { font-size: 1.05rem; }
  .hero { padding: 56px 0 48px; }
  .hero-cta { margin-top: 32px; gap: 10px; }
  .btn { padding: 12px 20px; font-size: .9rem; }
  .btn--lg { padding: 14px 26px; font-size: .95rem; }
  section { padding: 60px 0; }
  .sec-head { margin-bottom: 44px; }
  .panel { padding: 24px; }
  .code pre { padding: 14px 16px; font-size: .74rem; }
  .foot a { margin-left: 0; margin-right: 18px; }
}

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