/* stm32-st7789-gfx documentation site. One stylesheet, no framework. */
:root {
  --bg: #fbfcfe;
  --surface: #ffffff;
  --surface2: #f0f4fa;
  --border: #d8e0ec;
  --text: #17202e;
  --dim: #55627a;
  --accent: #2458d6;
  --accent-ink: #ffffff;
  --accent-soft: #e4ecff;
  --code-bg: #f2f5fa;
  --warn: #8a4b08;
  --warn-bg: #fff4e3;
  --radius: 10px;
  --maxw: 1040px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e121a; --surface: #151b26; --surface2: #1b2331; --border: #29344a;
    --text: #e8edf6; --dim: #9aa7bd; --accent: #7aa8ff; --accent-ink: #0b1220;
    --accent-soft: #1b2a4a; --code-bg: #111826; --warn: #f2b36a; --warn-bg: #2f2417;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e121a; --surface: #151b26; --surface2: #1b2331; --border: #29344a;
  --text: #e8edf6; --dim: #9aa7bd; --accent: #7aa8ff; --accent-ink: #0b1220;
  --accent-soft: #1b2a4a; --code-bg: #111826; --warn: #f2b36a; --warn-bg: #2f2417;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 var(--sans); -webkit-text-size-adjust: 100%;
}
.skip { position: absolute; left: 16px; top: -48px; background: var(--accent); color: var(--accent-ink);
  padding: 8px 14px; border-radius: 0 0 8px 8px; z-index: 50; }
.skip:focus { top: 0; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* header */
.site-header { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 15px; }
.brand img { width: 26px; height: 26px; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; align-items: center; }
.nav a { color: var(--dim); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: 15px; }
.nav a:hover { background: var(--surface2); color: var(--text); }
.nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.nav .lang { border: 1px solid var(--border); }
.theme-btn { border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 8px;
  padding: 5px 10px; font: inherit; font-size: 14px; cursor: pointer; }
.theme-btn:hover { background: var(--surface2); }

/* typography */
main { padding: 36px 0 64px; }
h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; margin: 0 0 14px; letter-spacing: -0.02em; text-wrap: balance; }
h2 { font-size: 1.6rem; line-height: 1.25; margin: 2.6em 0 .6em; letter-spacing: -0.01em; text-wrap: balance; }
h3 { font-size: 1.15rem; margin: 1.8em 0 .4em; }
p { margin: 0 0 1em; max-width: 72ch; }
.lead { font-size: 1.18rem; color: var(--dim); max-width: 62ch; }
ul, ol { padding-left: 1.3em; max-width: 72ch; }
li { margin: .25em 0; }
code { font-family: var(--mono); font-size: .9em; background: var(--code-bg); border: 1px solid var(--border);
  padding: .1em .38em; border-radius: 6px; }
pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px;
  overflow-x: auto; line-height: 1.5; tab-size: 4; margin: 0 0 1.2em; }
pre code { background: none; border: 0; padding: 0; font-size: 13.5px; }
.cap { color: var(--dim); font-size: .92rem; margin: -.4em 0 1.4em; }

/* hero */
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 36px; align-items: center; padding: 8px 0 12px; }
.hero .shots { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.shot { background: #0a0e16; border: 1px solid var(--border); border-radius: 12px; padding: 8px; margin: 0; }
.shot img { display: block; width: 100%; height: auto; image-rendering: pixelated; border-radius: 4px; }
.shot figcaption { color: #9aa7bd; font-size: 12px; text-align: center; padding-top: 6px; }
.btns { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 6px; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 9px; text-decoration: none; font-weight: 600;
  border: 1px solid var(--border); color: var(--text); background: var(--surface); }
.btn:hover { background: var(--surface2); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.08); }
.badges { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; margin: 18px 0 0; }
.badges li { margin: 0; background: var(--surface2); border: 1px solid var(--border); border-radius: 999px;
  padding: 3px 12px; font-size: 13.5px; color: var(--dim); }

/* cards and grids */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 18px 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.card h3 { margin-top: 0; }
.card p { margin-bottom: 0; color: var(--dim); font-size: .96rem; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 22px 0; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat b { display: block; font-size: 1.7rem; letter-spacing: -0.02em; color: var(--accent); }
.stat span { color: var(--dim); font-size: .92rem; }

/* figures */
figure.diagram { margin: 22px 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; }
figure.diagram img { display: block; width: 100%; height: auto; }
figure.diagram figcaption { color: var(--dim); font-size: .92rem; padding: 8px 4px 2px; }

/* tables */
.tablewrap { overflow-x: auto; margin: 0 0 1.4em; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .94rem; }
th, td { text-align: left; padding: 9px 13px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface2); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td code { white-space: nowrap; }

.note { background: var(--warn-bg); border: 1px solid color-mix(in srgb, var(--warn) 40%, transparent); color: var(--text);
  border-radius: var(--radius); padding: 12px 16px; margin: 0 0 1.4em; max-width: 72ch; }
.note b:first-child { color: var(--warn); }

/* page layout with table of contents */
.doc { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; align-items: start; }
.toc { position: sticky; top: 84px; font-size: .92rem; border-left: 2px solid var(--border); padding-left: 14px; }
.toc b { display: block; margin-bottom: 6px; color: var(--dim); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }
.toc a { display: block; padding: 3px 0; color: var(--dim); text-decoration: none; }
.toc a:hover { color: var(--accent); }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 26px 0 40px; color: var(--dim); font-size: .92rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.site-footer a { color: var(--dim); }

@media (max-width: 860px) {
  .hero, .doc { grid-template-columns: minmax(0, 1fr); }
  .toc { display: none; }
  .nav { margin-left: 0; }
  main { padding-top: 24px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }