/* APLflow: understated, typographic, theme-aware. No frameworks. */

@font-face {
  font-family: "APL385";
  src: url("Apl385.ttf") format("truetype");
  font-display: swap;
}

:root {
  --bg: #fdfdfb;
  --fg: #1c1e21;
  --muted: #5c6570;
  --accent: #0b6bab;
  --accent-soft: #e8f2f9;
  --rule: #d8dce0;
  --code-bg: #f4f5f6;
  --ok: #2e7d32;
  --bad: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e6e8ea;
    --muted: #9aa4ae;
    --accent: #66ccff;
    --accent-soft: #1b2733;
    --rule: #2c3238;
    --code-bg: #1d2126;
    --ok: #7bc67e;
    --bad: #f28b82;
  }
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Charter, "Bitstream Charter", Georgia, Cambria, serif;
  line-height: 1.65;
}

header.site {
  border-bottom: 1px solid var(--rule);
  padding: 1rem 1.25rem;
}

.site-inner, main, footer.site .site-inner {
  max-width: 44rem;
  margin: 0 auto;
}

header.site .site-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.4rem;
}

.brand {
  font-family: "APL385", ui-monospace, monospace;
  font-size: 1.15rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.brand .glyph { color: var(--accent); }

nav.site a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  margin-right: 1.1rem;
}

nav.site a:hover, nav.site a[aria-current="page"] { color: var(--accent); }

main { padding: 2.2rem 1.25rem 3.5rem; }

h1 {
  font-size: 1.8rem;
  line-height: 1.25;
  margin: 0 0 0.4rem;
  font-weight: 650;
}

h2 {
  font-size: 1.25rem;
  margin: 2.2rem 0 0.5rem;
  font-weight: 650;
}

h3 { font-size: 1.05rem; margin: 1.6rem 0 0.3rem; }

p.lede { font-size: 1.12rem; color: var(--muted); margin-top: 0; }

a { color: var(--accent); }

hr { border: 0; border-top: 1px solid var(--rule); margin: 2.2rem 0; }

code, pre, .apl {
  font-family: "APL385", ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.92em;
}

code { background: var(--code-bg); padding: 0.08em 0.3em; border-radius: 3px; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  line-height: 1.5;
}

pre code { background: none; padding: 0; }

pre .cm { color: var(--muted); }        /* comments */
pre .res { color: var(--accent); }      /* results */
pre .ok  { color: var(--ok); }
pre .bad { color: var(--bad); }

.loop {
  display: grid;
  gap: 0.9rem;
  margin: 1.6rem 0;
}

.step {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 0.9rem 1.1rem;
  background: var(--bg);
}

.step .who {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.step pre { margin: 0.5rem 0 0; }

.note {
  background: var(--accent-soft);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.95rem;
  margin: 1rem 0;
}

th, td {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

th {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
}

td.g {
  font-family: "APL385", ui-monospace, monospace;
  font-size: 1.05rem;
  color: var(--accent);
  white-space: nowrap;
}

.status {
  display: inline-block;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--rule);
  color: var(--muted);
}

.status.live { color: var(--ok); border-color: var(--ok); }

footer.site {
  border-top: 1px solid var(--rule);
  padding: 1.2rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

footer.site p { margin: 0.25rem 0; }

@media (max-width: 480px) {
  html { font-size: 16px; }
  h1 { font-size: 1.5rem; }
}