/* microSAMPLER Editor / Librarian — documentation site.
   Hand-built, no build step. Reuses the app's palette + fonts so the docs
   look like the hardware editor, but tuned for long-form reading.
   Multi-page: a shared top nav links Home / Getting started / Guide /
   Concepts / Troubleshooting; each page is a self-contained .html. */

@font-face { font-family: "Chakra Petch"; font-weight: 400; font-display: swap;
  src: url("../assets/fonts/chakra-petch-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 500; font-display: swap;
  src: url("../assets/fonts/chakra-petch-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 600; font-display: swap;
  src: url("../assets/fonts/chakra-petch-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 700; font-display: swap;
  src: url("../assets/fonts/chakra-petch-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Share Tech Mono"; font-weight: 400; font-display: swap;
  src: url("../assets/fonts/share-tech-mono-latin-400-normal.woff2") format("woff2"); }

:root {
  --steel-0: #0b0b0d; --steel-1: #121214; --steel-2: #18181c; --steel-3: #202026;
  --line: #2b2b33; --line-hi: #3a3a44;
  --ink: #cfc9bd; --ink-dim: #8a8478;
  --amber-rgb: 255, 138, 30; --amber: rgb(var(--amber-rgb));
  --amber-hi: #ffc063; --amber-dk: #8a4500;
  --phos-bg: color-mix(in srgb, rgb(var(--amber-rgb)) 9%, #000);
  --ok: #79e06b; --err: #ff4f3d;
  --maxw: 880px;
  font-size: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }   /* clear the sticky nav */
body {
  margin: 0; color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
  background:
    radial-gradient(1100px 460px at 70% -160px, #1a1a20 0%, transparent 60%),
    var(--steel-0);
}
a { color: var(--amber-hi); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

/* ── top navigation (shared across pages) ─────────────────────────────── */
.topnav {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 1.2rem;
  padding: .7rem 1.4rem;
  background: color-mix(in srgb, var(--steel-1) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topnav .brand { display: flex; align-items: center; gap: .55rem; }
.topnav .brand img { height: 26px; }
.topnav .brand b { font: 600 .8rem/1.1 "Chakra Petch", sans-serif; letter-spacing: .03em; color: #fff; }
.topnav .brand span { display: block; font-weight: 400; color: var(--ink-dim); font-size: .92em; }
.topnav nav { display: flex; gap: .2rem; margin-left: auto; flex-wrap: wrap; }
.topnav nav a {
  color: var(--ink-dim); font: 500 .82rem/1 "Chakra Petch", sans-serif; letter-spacing: .03em;
  padding: .5rem .7rem; border-radius: 6px;
}
.topnav nav a:hover { color: var(--ink); text-decoration: none; background: var(--steel-3); }
.topnav nav a.active { color: var(--amber); background: rgba(var(--amber-rgb), .1); }
.topnav nav a.gh { color: var(--ink); }
.menu-btn { display: none; }

/* ── content column ───────────────────────────────────────────────────── */
.content { max-width: var(--maxw); margin: 0 auto; padding: 2.4rem 1.6rem 6rem; min-width: 0; }

/* sub-page header (Guide / Concepts / etc.) */
.page-head { margin: .4rem 0 1.6rem; }
.page-head h1 { font: 500 2rem/1.1 "Chakra Petch", sans-serif; color: var(--amber); margin: 0 0 .3rem; }
.page-head p { color: var(--ink-dim); margin: 0; max-width: 60ch; }

/* in-page table of contents (long pages) */
.toc { border: 1px solid var(--line); border-radius: 8px; background: var(--steel-1);
  padding: .9rem 1.1rem; margin: 0 0 2rem; }
.toc b { display: block; font: 600 .62rem/1 "Chakra Petch", sans-serif; letter-spacing: .2em;
  color: var(--ink-dim); margin-bottom: .5rem; }
.toc ul { margin: 0; padding: 0; list-style: none; columns: 2; column-gap: 1.4rem; }
.toc li { margin: .18rem 0; }
.toc a { color: var(--amber-hi); font-size: .9rem; }
@media (max-width: 560px) { .toc ul { columns: 1; } }

/* ── hero (home) ──────────────────────────────────────────────────────── */
.hero { border: 1px solid var(--line); border-top-color: var(--line-hi);
  border-radius: 10px; background: linear-gradient(180deg, var(--steel-1), #0e0e10);
  padding: 2rem 2rem 1.6rem; margin-bottom: 2.2rem;
  box-shadow: inset 0 1px 0 var(--line-hi), 0 18px 50px rgba(0,0,0,.5); }
.hero h1 { margin: 0 0 .3rem; font: 400 2.1rem/1.1 "Chakra Petch", sans-serif; color: #fff; }
.hero h1 b { font-weight: 700; }
.hero .tag { color: var(--ink-dim); letter-spacing: .04em; margin: 0 0 1.4rem; }
.hero .demo { width: 100%; height: auto; border-radius: 6px; border: 1px solid #000;
  box-shadow: 0 10px 30px rgba(0,0,0,.6); display: block; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.3rem; align-items: center; }
.cta { display: inline-block; font: 600 .8rem/1 "Chakra Petch", sans-serif;
  letter-spacing: .1em; color: #1a0d00;
  background: linear-gradient(180deg, var(--amber-hi), var(--amber) 60%, var(--amber-dk));
  border: 1px solid var(--amber-dk); border-radius: 5px; padding: .7rem 1.1rem; }
.cta:hover { text-decoration: none; filter: brightness(1.07); }
.cta.ghost { color: var(--ink); background: var(--steel-3); border-color: var(--line-hi); }

/* ── home: cards linking to the sub-pages / highlighting features ─────── */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem; margin: 1.4rem 0 2rem; }
.card { display: block; border: 1px solid var(--line); border-top-color: var(--line-hi);
  border-radius: 9px; background: var(--steel-1); padding: 1.1rem 1.2rem;
  transition: transform .12s, border-color .12s, box-shadow .12s; }
a.card:hover { text-decoration: none; transform: translateY(-2px);
  border-color: var(--amber-dk); box-shadow: 0 8px 22px rgba(0,0,0,.4); }
.card h3 { margin: 0 0 .35rem; font: 600 1rem/1.2 "Chakra Petch", sans-serif; color: var(--amber-hi); }
.card p { margin: 0; color: var(--ink-dim); font-size: .9rem; }

/* ── typography ───────────────────────────────────────────────────────── */
.content h2 { font: 500 1.5rem/1.2 "Chakra Petch", sans-serif; color: var(--amber);
  margin: 2.8rem 0 .4rem; padding-top: .6rem; border-top: 1px solid var(--line); }
.content h2:first-of-type { border-top: 0; margin-top: 1rem; }
.content h3 { font: 600 1.05rem/1.3 "Chakra Petch", sans-serif; color: #fff; margin: 1.8rem 0 .4rem; }
.content p, .content li { color: var(--ink); }
.content strong { color: #fff; }
.content code { font-family: "Share Tech Mono", monospace; font-size: .88em;
  color: var(--amber-hi); background: var(--phos-bg);
  border: 1px solid rgba(var(--amber-rgb),.18); border-radius: 4px; padding: .08em .38em; }
.content pre { background: #060607; border: 1px solid var(--line); border-left: 3px solid var(--amber-dk);
  border-radius: 6px; padding: 1rem 1.1rem; overflow-x: auto; margin: 1rem 0; }
.content pre code { color: var(--ink); background: none; border: 0; padding: 0;
  font-size: .82rem; line-height: 1.7; }
kbd { font-family: "Share Tech Mono", monospace; font-size: .82em; color: var(--ink);
  background: var(--steel-3); border: 1px solid var(--line-hi); border-bottom-width: 2px;
  border-radius: 4px; padding: .1em .4em; }

/* steps + tables + figures */
ol.steps { counter-reset: s; list-style: none; padding-left: 0; }
ol.steps > li { counter-increment: s; position: relative; padding: .2rem 0 .9rem 2.4rem; }
ol.steps > li::before { content: counter(s); position: absolute; left: 0; top: .1rem;
  width: 1.6rem; height: 1.6rem; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font: 700 .8rem "Chakra Petch", sans-serif; color: var(--amber);
  background: var(--phos-bg); border: 1px solid rgba(var(--amber-rgb),.35); }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .9rem; }
th, td { text-align: left; padding: .5rem .7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--amber-hi); font: 600 .72rem/1.2 "Chakra Petch", sans-serif;
  letter-spacing: .08em; text-transform: uppercase; }
figure { margin: 1.4rem 0; }
figure img { border-radius: 6px; border: 1px solid var(--line); box-shadow: 0 8px 24px rgba(0,0,0,.5); }
figcaption { color: var(--ink-dim); font-size: .82rem; margin-top: .5rem; text-align: center; }

/* callouts */
.note { border: 1px solid var(--line); border-left: 3px solid var(--amber); border-radius: 6px;
  background: var(--steel-1); padding: .85rem 1.1rem; margin: 1.2rem 0; }
.note.warn { border-left-color: var(--err); }
.note.ok { border-left-color: var(--ok); }
.note p { margin: .3rem 0; }
.note b.label { display: block; font: 600 .64rem/1 "Chakra Petch", sans-serif;
  letter-spacing: .16em; color: var(--amber); margin-bottom: .35rem; }
.note.warn b.label { color: var(--err); }
.note.ok b.label { color: var(--ok); }

footer { margin-top: 3rem; padding-top: 1.4rem; border-top: 1px solid var(--line);
  color: var(--ink-dim); font-size: .82rem; }
footer .logo { height: 26px; margin-bottom: .6rem; opacity: .85; }
footer nav { display: flex; flex-wrap: wrap; gap: .2rem 1rem; margin-bottom: .8rem; }
footer nav a { color: var(--ink-dim); font-size: .82rem; }

/* narrow screens: nav links collapse behind a MENU button before they'd wrap */
@media (max-width: 820px) {
  .topnav { flex-wrap: wrap; }
  .topnav nav { display: none; order: 3; width: 100%; flex-direction: column; gap: 0; margin: .4rem 0 0; }
  .topnav nav.open { display: flex; }
  .topnav nav a { padding: .6rem .4rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .menu-btn { display: inline-block; margin-left: auto; background: var(--steel-3);
    color: var(--ink); border: 1px solid var(--line-hi); border-radius: 5px;
    font: 600 .7rem "Chakra Petch", sans-serif; padding: .45rem .7rem; cursor: pointer; }
  .hero h1 { font-size: 1.6rem; }
  .content { padding: 1.6rem 1.1rem 4rem; }
}

/* back-to-top button (shown after scrolling; href="#top" works without JS too) */
.to-top {
  position: fixed; right: 1.1rem; bottom: 1.1rem; z-index: 50;
  width: 40px; height: 40px; border-radius: 9px;
  display: grid; place-items: center; font-size: 1.2rem; line-height: 1;
  text-decoration: none; color: var(--amber);
  background: var(--steel-3); border: 1px solid var(--line-hi);
  box-shadow: 0 4px 16px rgba(0, 0, 0, .45);
  opacity: 0; transform: translateY(10px); pointer-events: none;
  transition: opacity .18s, transform .18s, color .12s, border-color .12s;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { color: var(--amber-hi); border-color: var(--amber); }

/* hover permalink on section headings */
h2 .anchor {
  margin-left: .45em; font-weight: 400; text-decoration: none;
  color: var(--ink-dim); opacity: 0; transition: opacity .12s, color .12s;
}
h2:hover .anchor, h2 .anchor:focus { opacity: 1; }
h2 .anchor:hover { color: var(--amber); }