@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #0a0c0f;
  --bg-elevated: #12151a;
  --bg-callout: #0f1a18;
  --text: #e7eaee;
  --text-muted: #8891a0;
  --text-faint: #565d68;
  --border: #22262d;
  --accent: #5eead4;
  --accent-dim: #3fa494;
  --accent-warm: #ffb454;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Pretendard', -apple-system, 'Malgun Gothic', sans-serif;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(94, 234, 212, 0.06), transparent);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- Terminal header ---- */
.termbar {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.termbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
}
.dots { display: flex; gap: 6px; margin-right: 4px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #3a3f47; }
.termbar-path { color: var(--accent); }
.cursor {
  display: inline-block;
  width: 7px;
  height: 14px;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1.1s steps(1) infinite;
  vertical-align: -2px;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---- Hero ---- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 32px;
  border-bottom: 1px solid var(--border);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.hero .meta {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-faint);
}
.hero .meta span { color: var(--text-muted); }
.crosslink {
  margin-top: 20px;
  font-size: 14px;
}
.crosslink a { color: var(--text-muted); border-bottom: 1px dashed var(--text-faint); }
.crosslink a:hover { color: var(--accent); border-color: var(--accent); }

/* ---- Layout ---- */
.layout {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 24px 100px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

@media (min-width: 900px) {
  .layout {
    max-width: 980px;
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }
}

/* ---- TOC ---- */
.toc {
  position: static;
  font-family: var(--mono);
  font-size: 12.5px;
}
@media (min-width: 900px) {
  .toc { position: sticky; top: 24px; }
}
.toc-label {
  color: var(--text-faint);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--border);
}
.toc li { margin: 0; }
.toc a {
  display: block;
  color: var(--text-muted);
  padding: 6px 0 6px 14px;
  border-left: 1px solid transparent;
  margin-left: -1px;
  line-height: 1.4;
}
.toc a:hover { color: var(--accent); text-decoration: none; border-left-color: var(--accent); }

/* ---- Document ---- */
.doc { min-width: 0; }

.doc section {
  padding-top: 8px;
  margin-bottom: 40px;
  scroll-margin-top: 24px;
}

.sec-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-dim);
  display: block;
  margin-bottom: 6px;
}

.doc h2 {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.doc p { margin: 0 0 14px; color: var(--text); }
.doc p.lead { color: var(--text-muted); }

.doc ol, .doc ul {
  margin: 0 0 14px;
  padding-left: 22px;
}
.doc li { margin-bottom: 8px; color: var(--text); }
.doc ul ol, .doc ol ol { margin-top: 8px; }

.callout {
  background: var(--bg-callout);
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
  padding: 16px 18px;
  margin: 18px 0;
}
.callout-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.callout p:last-child { margin-bottom: 0; }
code {
  font-family: var(--mono);
  background: rgba(94, 234, 212, 0.12);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.92em;
}

.contact-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--text-muted);
}
.contact-box .k { color: var(--text-faint); }
.contact-box .v { color: var(--accent); }

/* ---- Footer ---- */
footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 24px 60px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-faint);
  border-top: 1px solid var(--border);
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; opacity: 1; }
  html { scroll-behavior: auto; }
}