@font-face { font-family: "Manrope"; src: url("/assets/fonts/font-b.woff2") format("woff2"); font-weight: 100 900; font-style: normal; font-display: swap; }
@font-face { font-family: "Kode Mono"; src: url("/assets/fonts/font-a.woff2") format("woff2"); font-weight: 100 900; font-style: normal; font-display: swap; }
/* Zen ukiyo-e / Green Beach washi palette (light-only, matches the homepage). */
:root {
  --bg: #070806; --surface: #0d100b; --surface-2: #11150e; --ink: #e7ebdd;
  --muted: #828a72; --faint: #5b6150; --line: #191d14; --line-strong: #242a1b;
  --green: #d5fd51; --green-deep: #8aa63a; --green-soft: rgba(213,253,81,0.08); --crash: #d5fd51; --crash-soft: rgba(213,253,81,0.06);
  --logo-bg: #0e120b;
  --sans: "Manrope", system-ui, -apple-system, sans-serif;
  --display: "Manrope", system-ui, -apple-system, sans-serif;
  --mono: "Kode Mono", ui-monospace, Menlo, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 15.5px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* header */
.dh { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.dh-in { max-width: 1240px; margin: 0 auto; padding: 0 24px; height: 60px; display: flex; align-items: center; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--display); font-weight: 700; letter-spacing: 0.13em; font-size: 14px; }
.brand img.brandpng { height: 42px; width: auto; display: block; filter: drop-shadow(0 0 12px rgba(247,244,236,0.22)); }
.docs-badge { font-size: 10px; letter-spacing: 0.1em; color: var(--green); background: var(--green-soft); padding: 3px 8px; border-radius: 6px; font-weight: 600; }
.dh-links { margin-left: auto; display: flex; align-items: center; gap: 20px; font-size: 13.5px; color: var(--muted); }
.dh-links a:hover { color: var(--ink); }
.dh-menu { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 8px; width: 34px; height: 34px; font-size: 18px; cursor: pointer; color: var(--ink); }

/* layout */
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 210px minmax(0, 1fr) 190px; gap: 44px; align-items: start; }
.side { position: sticky; top: 76px; padding-top: 36px; }
.side-group { margin-bottom: 22px; }
.side-cap { font-size: 10.5px; letter-spacing: 0.11em; text-transform: uppercase; color: var(--faint); font-weight: 650; margin-bottom: 8px; }
.side-nav a { display: block; font-size: 13.8px; color: var(--muted); padding: 4px 10px; border-radius: 7px; border-left: 2px solid transparent; }
.side-nav a:hover { color: var(--ink); background: var(--surface-2); }
.side-nav a.on { color: var(--green); font-weight: 600; border-left-color: var(--green); background: var(--green-soft); }

.main { padding: 36px 0 60px; min-width: 0; }
.prose { max-width: 720px; }
.prose h1 { font-family: var(--display); font-size: 33px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 12px; text-wrap: balance; }
.prose .lead { font-size: 18px; color: var(--muted); margin: 0 0 30px; }
.prose h2 { font-family: var(--display); font-size: 21px; font-weight: 650; letter-spacing: -0.01em; margin: 40px 0 12px; scroll-margin-top: 78px; }
.prose p { margin: 0 0 16px; }
.prose a:not(.pg) { color: var(--green); font-weight: 500; }
.prose a:not(.pg):hover { text-decoration: underline; }
.prose strong { font-weight: 650; }
.prose code { font-family: var(--mono); font-size: 0.88em; background: var(--surface-2); border: 1px solid var(--line); padding: 1px 5px; border-radius: 5px; }

/* toc */
.toc { position: sticky; top: 76px; padding-top: 42px; font-size: 13px; }
.toc-cap { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); font-weight: 650; margin-bottom: 10px; }
.toc a { display: block; color: var(--muted); padding: 4px 0; border-left: 2px solid var(--line); padding-left: 12px; }
.toc a:hover { color: var(--green); border-left-color: var(--green); }

/* figures */
.fig { margin: 22px 0 26px; }
.fig-cap, figcaption.fig-cap { font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); font-weight: 600; margin-bottom: 12px; }
.fig-hero { margin: 8px 0 30px; }
.fig-hero canvas { width: 100%; height: 300px; display: block; background: radial-gradient(120% 90% at 50% 100%, var(--green-soft), transparent 70%); border: 1px solid var(--line); border-radius: 14px; }

.flow { display: flex; flex-direction: column; align-items: center; gap: 0; }
.flow-box { position: relative; width: 100%; max-width: 440px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px 12px 44px; font-size: 14px; font-weight: 500; box-shadow: 0 1px 2px rgba(17,24,17,0.03); }
.flow-n { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--green); }
.flow-arrow { color: var(--line-strong); font-size: 16px; line-height: 1; padding: 5px 0; }

.split { display: flex; flex-direction: column; gap: 10px; }
.split-row { display: grid; grid-template-columns: 48px 1fr auto; gap: 14px; align-items: center; font-size: 14px; }
.split-pct { font-weight: 650; color: var(--green); }
.split-bar { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; }
.split-bar i { display: block; height: 100%; background: var(--green); border-radius: 4px; }
.split-to { color: var(--muted); }

.cols2 { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.col { padding: 16px 18px; }
.col + .col { border-left: 1px solid var(--line); }
.col-on { background: var(--green-soft); }
.col-h { font-size: 11px; letter-spacing: 0.09em; text-transform: uppercase; color: var(--faint); font-weight: 650; margin-bottom: 10px; }
.col-on .col-h { color: var(--green); }
.col ul { margin: 0; padding: 0; list-style: none; font-size: 13.6px; color: var(--muted); }
.col-on ul { color: var(--ink); }
.col li { padding: 3px 0; padding-left: 16px; position: relative; }
.col li::before { content: "·"; position: absolute; left: 4px; color: var(--green); }

.term { background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.term-bar { display: flex; gap: 6px; padding: 11px 14px; border-bottom: 1px solid var(--line); }
.term-bar span { width: 9px; height: 9px; border-radius: 50%; background: var(--line-strong); }
.term pre { margin: 0; padding: 14px 16px; font-family: var(--mono); font-size: 12.3px; line-height: 1.85; color: var(--muted); white-space: pre-wrap; word-break: break-word; }
.c-green { color: var(--green); } .c-muted { color: var(--faint); }

.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: left; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); font-weight: 650; padding: 11px 16px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.tbl td { padding: 10px 16px; border-bottom: 1px solid var(--line); }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td:first-child { font-weight: 550; }
.tbl td:nth-child(2), .tbl td:nth-child(3) { font-family: var(--mono); font-size: 13px; color: var(--muted); }

/* pager */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.pg { display: flex; flex-direction: column; gap: 3px; padding: 14px 18px; border: 1px solid var(--line); border-radius: 12px; }
.pg:hover { border-color: var(--green); }
.pg span { font-size: 12px; color: var(--faint); }
.pg b { font-weight: 600; font-size: 14.5px; color: var(--green); }
.pg.next { text-align: right; }

/* footer */
.df { border-top: 1px solid var(--line); background: var(--surface-2); }
.df-in { max-width: 1240px; margin: 0 auto; padding: 22px 24px; font-size: 12.5px; color: var(--faint); }

@media (max-width: 1080px) { .wrap { grid-template-columns: 200px minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 780px) {
  .wrap { grid-template-columns: 1fr; }
  .side { position: fixed; top: 60px; left: 0; bottom: 0; width: 250px; background: var(--bg); border-right: 1px solid var(--line); padding: 16px 18px; transform: translateX(-100%); transition: transform 0.2s ease; z-index: 30; overflow-y: auto; }
  .side.open { transform: none; }
  .dh-menu { display: block; }
  .pager { grid-template-columns: 1fr; }
  .cols2 { grid-template-columns: 1fr; } .col + .col { border-left: 0; border-top: 1px solid var(--line); }
}
@media (prefers-reduced-motion: reduce) { .side { transition: none; } }