* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
:root {
  --ink: #202124;
  --muted: #667085;
  --line: #d8dee6;
  --soft: #f5f7f9;
  --accent: #2f7fb6;
  --dark: #252525;
  --pattern: url("https://raw.githubusercontent.com/abhn/portfolio/master/assets/images/background.png");
}
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "PT Sans", "Pretendard", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.75;
}
a { color: var(--accent); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; }
.document-header {
  color: #fff;
  background-image: var(--pattern);
  background-repeat: repeat;
  border-bottom: 1px solid rgba(255,255,255,.18);
}
.document-header__inner {
  width: min(1180px, 94vw);
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}
.document-name {
  color: #fff;
  font-size: 1.12rem;
  font-weight: 700;
  text-decoration: none;
}
.document-nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.document-nav a {
  min-height: 34px;
  padding: 6px 11px;
  display: inline-flex;
  align-items: center;
  color: #fff;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 2px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
}
.document-nav a:hover { color: #222; background: #fff; }
.document-title {
  padding: 44px 20px 42px;
  color: #fff;
  background-image: var(--pattern);
  background-repeat: repeat;
}
.document-title > div { width: min(1040px, 94vw); margin: 0 auto; }
.document-title p {
  margin: 0 0 8px;
  color: #a9d5f0;
  font-size: .86rem;
  font-weight: 700;
  letter-spacing: .08em;
}
.document-title h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(2rem, 4.5vw, 3.45rem);
  line-height: 1.15;
  letter-spacing: -.03em;
}
.document-main { padding: 56px 20px 88px; }
.document-content { width: min(1040px, 94vw); margin: 0 auto; }
.document-content > h1:first-child { display: none; }
.document-content h1,
.document-content h2,
.document-content h3,
.document-content h4 {
  color: var(--ink);
  line-height: 1.28;
  letter-spacing: -.02em;
}
.document-content h1 { margin: 0 0 32px; font-size: 2.35rem; }
.document-content h2 {
  margin: 68px 0 22px;
  padding-top: 4px;
  font-size: 2rem;
  border-top: 2px solid var(--ink);
}
.document-content h3 { margin: 38px 0 16px; font-size: 1.42rem; }
.document-content p { margin: 0 0 20px; }
.document-content hr { margin: 54px 0; border: 0; border-top: 1px solid var(--line); }
.document-content ul,
.document-content ol { padding-left: 1.5rem; }
.document-content li { margin: 6px 0; }
.document-content blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  color: #4e5968;
  background: var(--soft);
  border-left: 4px solid var(--accent);
}
.document-content code {
  padding: .12em .32em;
  color: #27354a;
  background: #eef2f6;
  border-radius: 3px;
}
.document-content pre {
  overflow: auto;
  padding: 20px;
  color: #e8eaed;
  background: #1e1e1e;
  border-radius: 3px;
  line-height: 1.55;
}
.document-content pre code { padding: 0; color: inherit; background: transparent; }
.document-content img {
  display: block;
  margin: 24px auto;
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(28,39,51,.08);
}
.document-content figure { margin: 28px 0; }
.document-content figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: .92rem;
  text-align: center;
}
.document-content table {
  width: 100%;
  margin: 24px 0 34px;
  border-collapse: collapse;
  font-size: .96rem;
}
.document-content th,
.document-content td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.document-content th { background: var(--soft); font-weight: 700; }
.nav-links,
.primary-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}
.nav-links a,
.primary-links a {
  padding: 9px 14px;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 2px;
  font-weight: 700;
  text-decoration: none;
}
.nav-links a:hover,
.primary-links a:hover { color: #fff; background: var(--ink); }
.resource-grid,
.flow-grid,
.scale-grid,
.metric-grid,
.image-grid,
.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 28px 0;
}
.flow-card,
.resource-card,
.metric-card,
.scale-grid article,
.callout,
.warning {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.resource-card,
.flow-card { box-shadow: 0 8px 22px rgba(28,39,51,.06); }
.resource-card a { text-decoration: none; }
.callout { border-left: 4px solid var(--accent); }
.warning { border-left: 4px solid #d88921; background: #fffaf3; }
.document-footer {
  min-height: 58px;
  padding: 14px 3vw;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 22px;
  color: #fff;
  background-image: var(--pattern);
  background-repeat: repeat;
  font-size: .88rem;
}
.document-footer a { color: #fff; }
@media (max-width: 780px) {
  body { font-size: 16px; }
  .document-header__inner { padding: 14px 0; align-items: flex-start; flex-direction: column; }
  .document-nav { justify-content: flex-start; }
  .document-title { padding-top: 34px; padding-bottom: 34px; }
  .document-main { padding: 38px 14px 64px; }
  .document-content h2 { margin-top: 52px; font-size: 1.65rem; }
  .resource-grid,
  .flow-grid,
  .scale-grid,
  .metric-grid,
  .image-grid,
  .hero-grid { grid-template-columns: 1fr; }
  .document-content table { display: block; overflow-x: auto; white-space: nowrap; }
}