/* torchnative guide: shared thisisthepy tokens, torchnative accent. */
:root {
  --bg: #fbfbfa; --fg: #16181d; --muted: #5b6270; --line: #e6e6e3; --code-bg: #f3f3f1;
  --radius: 10px; --maxw: 72rem;
  --font-sans: "Inter", "IBM Plex Sans KR", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --accent: #e8590c;
  --accent-soft: rgba(232, 89, 12, 0.09);
  --ok: #2f8f5b; --partial: #b7791f; --planned: #6b7280; --no: #c0392b;
  --surface: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0f1115; --fg: #e8e9ec; --muted: #9aa1ad; --line: #252a33; --code-bg: #161a21;
  --accent: #ff7a33; --accent-soft: rgba(255, 122, 51, 0.12); --surface: #13161c;
  --ok: #4cc38a; --partial: #e0a84b; --planned: #9aa1ad; --no: #f06a5a;
  color-scheme: dark; } }
:root[data-theme="dark"] {
  --bg: #0f1115; --fg: #e8e9ec; --muted: #9aa1ad; --line: #252a33; --code-bg: #161a21;
  --accent: #ff7a33; --accent-soft: rgba(255, 122, 51, 0.12); --surface: #13161c;
  --ok: #4cc38a; --partial: #e0a84b; --planned: #9aa1ad; --no: #f06a5a;
  color-scheme: dark;
}

/* Language: one page set, the inactive language is hidden. */
html:not([lang="ko"]) [data-lang="ko"],
html[lang="ko"] [data-lang="en"] { display: none !important; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.7 var(--font-sans); letter-spacing: -0.005em;
  overflow-x: hidden;
}
html[lang="ko"] body { word-break: keep-all; line-height: 1.8; }
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
code, pre, kbd { font-family: var(--font-mono); font-size: 0.88em; }
:not(pre) > code { background: var(--code-bg); padding: 0.12em 0.38em; border-radius: 5px; }
pre {
  background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.1rem; overflow-x: auto; line-height: 1.6; margin: 1.2rem 0;
}
pre code { background: none; padding: 0; }
.c { color: var(--muted); }               /* code comment */
.k { color: var(--accent); }              /* keyword-ish emphasis in code */
hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.top-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0.7rem 16px;
  display: flex; align-items: center; gap: 1rem;
}
.brand { display: flex; align-items: center; gap: 0.55rem; font-weight: 650; text-decoration: none; }
.brand-mark { width: 22px; height: 22px; flex: none; }
.brand-name { font-family: var(--font-mono); font-size: 0.98rem; letter-spacing: -0.02em; }
.spacer { flex: 1; }
.toggle {
  font: 500 0.82rem/1 var(--font-sans); color: var(--fg); background: transparent;
  border: 1px solid var(--line); border-radius: 999px; padding: 0.45rem 0.8rem; cursor: pointer;
  min-height: 34px;
}
.toggle:hover { border-color: var(--accent); color: var(--accent); }
.toggle:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Layout */
.layout {
  max-width: var(--maxw); margin: 0 auto; padding: 0 16px;
  display: grid; grid-template-columns: 13.5rem minmax(0, 1fr); gap: 3rem;
}
.side { padding-top: 2.2rem; }
.side details { position: sticky; top: 4.6rem; }
.side summary { list-style: none; cursor: pointer; font-size: 0.8rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.6rem; }
.side summary::-webkit-details-marker { display: none; }
nav ul { list-style: none; margin: 0; padding: 0; }
nav li { margin: 0; }
nav a {
  display: block; text-decoration: none; color: var(--muted); font-size: 0.92rem;
  padding: 0.32rem 0 0.32rem 0.85rem; border-left: 2px solid var(--line);
}
nav a:hover { color: var(--fg); border-left-color: var(--muted); }
nav a[aria-current="page"] { color: var(--fg); border-left-color: var(--accent); font-weight: 600; }
nav .group { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--muted); margin: 1.1rem 0 0.35rem; }

main { min-width: 0; padding: 2.2rem 0 5rem; }
.content { max-width: 46rem; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; font-weight: 680; }
h1 { font-size: clamp(1.9rem, 4.2vw, 2.6rem); margin: 0.4rem 0 1rem; }
h2 { font-size: 1.45rem; margin: 2.8rem 0 0.8rem; }
h3 { font-size: 1.08rem; margin: 1.8rem 0 0.5rem; }
.eyebrow { font: 600 0.75rem/1 var(--font-mono); color: var(--accent); text-transform: uppercase;
  letter-spacing: 0.12em; }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 40rem; }
table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: 0.93rem; }
th, td { text-align: left; vertical-align: top; padding: 0.6rem 0.7rem 0.6rem 0; border-bottom: 1px solid var(--line); }
th { font-weight: 600; color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; }
.table-wrap { overflow-x: auto; }
.note {
  border-left: 3px solid var(--accent); background: var(--accent-soft);
  padding: 0.85rem 1.1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.4rem 0;
}

/* Hero (home) */
.hero { padding: 3.2rem 0 1.5rem; }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); max-width: 15ch; margin: 0.8rem 0 1.2rem; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { font-size: 1.2rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.8rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem; text-decoration: none; font-weight: 600;
  font-size: 0.93rem; padding: 0.68rem 1.1rem; border-radius: 999px; border: 1px solid var(--line);
}
.btn.primary { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.install { display: inline-block; margin-top: 1.4rem; }

/* The idea diagram */
.stack { margin: 2.6rem 0 1rem; display: grid; gap: 6px; max-width: 40rem; }
.layer {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1rem; align-items: center;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 0.85rem 1rem; background: var(--surface);
}
.layer .name { font-family: var(--font-mono); font-size: 0.9rem; }
.layer .who { font-size: 0.78rem; color: var(--muted); text-align: right; }
.layer.ours { border: 1.5px solid var(--accent); background: var(--accent-soft); }
.layer.ours .who { color: var(--accent); font-weight: 600; }
.layer.below { border-style: dashed; }
.door { justify-self: center; width: 2px; height: 18px; background: var(--accent); }

/* Principles grid */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin: 1.4rem 0; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; background: var(--surface); }
.card h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; }
.card .num { font: 600 0.75rem/1 var(--font-mono); color: var(--accent); }

/* Status chips */
.chip { display: inline-block; font: 600 0.72rem/1 var(--font-mono); padding: 0.28rem 0.5rem;
  border-radius: 999px; border: 1px solid currentColor; white-space: nowrap; }
.chip.ok { color: var(--ok); } .chip.partial { color: var(--partial); }
.chip.planned { color: var(--planned); } .chip.no { color: var(--no); }

.grades { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin: 1.4rem 0;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.grades div { padding: 0.9rem 1rem; border-right: 1px solid var(--line); }
.grades div:last-child { border-right: 0; background: var(--accent-soft); }
.grades b { display: block; font-family: var(--font-mono); font-size: 0.85rem; }
.grades span { font-size: 0.85rem; color: var(--muted); }

.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3.5rem;
  padding-top: 1.4rem; border-top: 1px solid var(--line); font-size: 0.92rem; }
.pager a { text-decoration: none; color: var(--muted); }
.pager a:hover { color: var(--accent); }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem; }
footer .top-inner { padding: 1.4rem 16px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .side { padding-top: 1rem; }
  .side details { position: static; border: 1px solid var(--line); border-radius: var(--radius); padding: 0.6rem 0.9rem; }
  .side summary { margin: 0; }
  .side details[open] summary { margin-bottom: 0.6rem; }
  main { padding-top: 1.2rem; }
  .grades { grid-template-columns: minmax(0, 1fr); }
  .grades div { border-right: 0; border-bottom: 1px solid var(--line); }
  .grades div:last-child { border-bottom: 0; }
}
@media (max-width: 420px) {
  .brand-name { font-size: 0.9rem; }
  .toggle { padding: 0.4rem 0.6rem; }
  .layer { grid-template-columns: minmax(0, 1fr); gap: 0.2rem; }
  .layer .who { text-align: left; }
}