/* pythonx-compose guide: shared thisisthepy family tokens, accent #7c4dff. */
: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: #7c4dff; --accent-ink: #5b2fe0; --accent-soft: rgba(124, 77, 255, 0.09);
  --ok: #0f9d76; --partial: #b7791f; --planned: #5b6270;
  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: #a68bff; --accent-ink: #c2b1ff; --accent-soft: rgba(166, 139, 255, 0.12);
  --ok: #3cc89c; --partial: #e0a84a; --planned: #9aa1ad;
  color-scheme: dark; } }
:root[data-theme="dark"] {
  --bg: #0f1115; --fg: #e8e9ec; --muted: #9aa1ad; --line: #252a33; --code-bg: #161a21;
  --accent: #a68bff; --accent-ink: #c2b1ff; --accent-soft: rgba(166, 139, 255, 0.12);
  --ok: #3cc89c; --partial: #e0a84a; --planned: #9aa1ad;
  color-scheme: dark;
}

/* Language switching: only the active language is shown. */
html[lang="en"] [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-family: var(--font-sans); font-size: 16.5px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
html[lang="ko"] body { word-break: keep-all; line-height: 1.75; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
code, pre, kbd { font-family: var(--font-mono); font-size: 0.88em; }
:not(pre) > code { background: var(--code-bg); padding: 0.1em 0.38em; border-radius: 5px; overflow-wrap: anywhere; }
pre {
  background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.15rem; overflow-x: auto; line-height: 1.6; margin: 1.1rem 0;
}
pre code { font-size: 0.86rem; }
.c { color: var(--muted); }          /* comment */
.k { color: var(--accent-ink); }     /* keyword / emphasis inside code */

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
@media (max-width: 480px) { .wrap { padding: 0 1rem; } }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(140%) blur(10px); -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; gap: 1.25rem; min-height: 3.6rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--fg); font-weight: 650; letter-spacing: -0.01em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 22px; height: 22px; flex: none; }
.nav { display: flex; gap: 0.15rem; flex: 1; min-width: 0; }
.site-header .nav a {
  color: var(--muted); padding: 0.35rem 0.6rem; border-radius: 7px; font-size: 0.93rem; white-space: nowrap;
}
.nav a:hover { color: var(--fg); background: var(--code-bg); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--fg); background: var(--accent-soft); }
.tools { display: flex; gap: 0.4rem; margin-left: auto; }
.btn-ghost {
  font: inherit; font-size: 0.86rem; color: var(--fg); background: transparent;
  border: 1px solid var(--line); border-radius: 8px; padding: 0.3rem 0.65rem; cursor: pointer;
  display: inline-flex; align-items: center; gap: 0.35rem; min-height: 2rem;
}
.btn-ghost:hover { border-color: var(--accent); }
.btn-ghost svg { width: 16px; height: 16px; }
@media (max-width: 860px) {
  .bar { flex-wrap: wrap; gap: 0.5rem 1rem; padding: 0.5rem 0; }
  .nav { order: 3; flex-basis: 100%; overflow-x: auto; scrollbar-width: none; padding-bottom: 0.2rem; }
  .nav::-webkit-scrollbar { display: none; }
}

/* Hero */
section.hero { padding: 5.5rem 0 3.5rem; border-top: 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.82rem; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.2rem 0.75rem; margin-bottom: 1.6rem;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
h1, h2, h3 { letter-spacing: -0.022em; line-height: 1.2; font-weight: 680; }
.hero h1 { font-size: clamp(2.3rem, 6vw, 4.1rem); margin: 0 0 1.1rem; letter-spacing: -0.035em; }
.hero h1 em { font-style: normal; color: var(--accent); }
.lead { font-size: clamp(1.08rem, 2.1vw, 1.3rem); color: var(--muted); max-width: 44rem; margin: 0 0 2rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.45rem; padding: 0.62rem 1.1rem; border-radius: 9px;
  font-weight: 560; font-size: 0.97rem; border: 1px solid var(--line); color: var(--fg); background: var(--bg);
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
a.btn.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
:root[data-theme="dark"] .btn.primary { color: #0f1115; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary { color: #0f1115; } }

/* Sections */
section { padding: 3rem 0; border-top: 1px solid var(--line); }
section.flush { border-top: 0; padding-top: 0; }
.kicker { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent-ink); letter-spacing: 0.04em; text-transform: uppercase; margin: 0 0 0.6rem; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 1rem; }
h3 { font-size: 1.12rem; margin: 1.8rem 0 0.5rem; }
p { margin: 0 0 1rem; }
.muted { color: var(--muted); }
.narrow { max-width: 46rem; }

/* Translation pair: Kotlin on the left, Python on the right. */
.pair { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 0.9rem; align-items: stretch; margin: 1.5rem 0; }
.pair .pane { min-width: 0; }
.pair .pane pre { margin: 0; height: calc(100% - 1.8rem); }
.pair .label { font-family: var(--font-mono); font-size: 0.76rem; color: var(--muted); margin: 0 0 0.45rem; }
.pair .arrow { align-self: center; color: var(--accent); font-family: var(--font-mono); font-size: 1.3rem; }
@media (max-width: 760px) {
  .pair { grid-template-columns: minmax(0, 1fr); }
  .pair .arrow { justify-self: center; transform: rotate(90deg); }
}

/* Diagram */
.figure { margin: 1.5rem 0 0.5rem; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; background: var(--bg); }
.figure svg { width: 100%; height: auto; display: block; }
.figure svg text { font-family: var(--font-mono); font-size: 13px; fill: var(--fg); }
.figure svg .sub { fill: var(--muted); font-size: 11.5px; }
.figure svg .box { fill: var(--code-bg); stroke: var(--line); }
.figure svg .box.us { fill: var(--accent-soft); stroke: var(--accent); }
.figure svg .edge { stroke: var(--muted); stroke-width: 1.4; fill: none; }
.figure svg .edge.dash { stroke-dasharray: 4 4; stroke: var(--accent); }
.figure svg .head { fill: var(--muted); }
.figure svg .head.us { fill: var(--accent); }
figcaption { font-size: 0.9rem; color: var(--muted); margin-top: 0.8rem; }
.figure svg.fig-wide { display: block; }
.figure svg.fig-tall { display: none; max-width: 22rem; margin: 0 auto; }
@media (max-width: 640px) { .figure svg.fig-wide { display: none; } .figure svg.fig-tall { display: block; } }

/* Grids and cards */
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr)); }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.15rem 1.2rem; background: var(--bg); }
.card h3 { margin: 0 0 0.4rem; font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card .glyph { font-family: var(--font-mono); color: var(--accent-ink); font-size: 0.85rem; margin-bottom: 0.55rem; display: block; }
a.card { color: inherit; display: block; }
a.card:hover { text-decoration: none; border-color: var(--accent); }

ul.clean { padding-left: 1.1rem; margin: 0 0 1rem; }
ul.clean li { margin: 0.3rem 0; }
.not li::marker { content: "– "; color: var(--muted); }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1rem 0 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 0.93rem; }
th, td { text-align: left; padding: 0.6rem 0.85rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: 0.82rem; background: var(--code-bg); }
tr:last-child td { border-bottom: 0; }

/* Status chips */
.chip { display: inline-block; font-family: var(--font-mono); font-size: 0.74rem; padding: 0.08rem 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); }

.note { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 0.8rem 1rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.2rem 0; font-size: 0.95rem; }
.note p:last-child { margin: 0; }

/* Page layout for inner pages */
.page-head { padding: 3.5rem 0 1.5rem; }
.page-head h1 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); margin: 0 0 0.6rem; }
.doc { padding-bottom: 3rem; }
.doc section { padding: 2.2rem 0; }
.pager { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; border-top: 1px solid var(--line); padding: 1.5rem 0 0; margin-top: 1rem; }

details { border: 1px solid var(--line); border-radius: var(--radius); padding: 0.85rem 1.1rem; margin: 0.6rem 0; }
details summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 0.5rem; }

footer { border-top: 1px solid var(--line); padding: 2rem 0 3rem; color: var(--muted); font-size: 0.88rem; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }