:root {
  --bg-color: #0a0a0a;
  --surface: #121212;
  --surface-raised: #171717;
  --text-main: #f5f5f5;
  --text-sub: #929292;
  --border: #272727;
  --brand-orange: #fbad31;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Segoe UI", sans-serif;
  line-height: 1.7;
  background: var(--bg-color);
}

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--brand-orange); outline-offset: 4px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(18px);
}

.header-inner,
.page-shell {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: #000;
  background: var(--brand-orange);
}

.header-nav { display: flex; align-items: center; gap: 22px; color: var(--text-sub); font-size: 14px; font-weight: 650; }
.header-nav a:hover, .header-nav a.active { color: var(--brand-orange); }
.lang { padding-left: 22px; border-left: 1px solid var(--border); }

.page-shell { padding: 96px 0 120px; }
.eyebrow { display: block; margin-bottom: 16px; color: var(--brand-orange); font-size: 12px; font-weight: 800; letter-spacing: 0.11em; text-transform: uppercase; }

.posts-hero { max-width: 760px; margin-bottom: 72px; }
.posts-hero h1, .article-header h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.06em;
  word-break: keep-all;
}
.posts-hero p { max-width: 680px; margin: 24px 0 0; color: var(--text-sub); font-size: 19px; word-break: keep-all; }

.post-list { border-top: 1px solid var(--border); }
.post-card {
  display: grid;
  grid-template-columns: 170px 1fr auto;
  gap: 36px;
  align-items: start;
  padding: 38px 0;
  border-bottom: 1px solid var(--border);
  transition: color .2s ease;
}
.post-card:hover h2 { color: var(--brand-orange); }
.post-date { color: var(--text-sub); font-size: 14px; }
.post-card h2 { margin: 0 0 12px; font-size: clamp(24px, 3vw, 34px); line-height: 1.25; letter-spacing: -0.04em; word-break: keep-all; transition: color .2s ease; }
.post-card p { max-width: 680px; margin: 0; color: var(--text-sub); word-break: keep-all; }
.post-arrow { padding-top: 6px; color: var(--brand-orange); font-size: 24px; }

.article-shell { width: min(760px, calc(100% - 48px)); margin: 0 auto; padding: 88px 0 120px; }
.back-link { display: inline-flex; margin-bottom: 64px; color: var(--text-sub); font-size: 14px; }
.back-link:hover { color: var(--brand-orange); }
.article-header { margin-bottom: 68px; }
.article-header h1 { font-size: clamp(40px, 6.5vw, 68px); }
.article-lead { margin: 28px 0 24px; color: #c9c9c9; font-size: 21px; line-height: 1.75; word-break: keep-all; }
.article-byline { color: var(--text-sub); font-size: 14px; }

.article-body h2 { margin: 84px 0 22px; font-size: 30px; line-height: 1.3; letter-spacing: -0.04em; word-break: keep-all; }
.article-body h3 { margin: 42px 0 14px; font-size: 21px; letter-spacing: -0.025em; }
.article-body p { margin: 0 0 24px; color: #b7b7b7; font-size: 17px; word-break: keep-all; }
.article-body strong { color: var(--text-main); }
.article-body ul, .article-body ol { margin: 0 0 28px; padding-left: 24px; color: #b7b7b7; }
.article-body li { margin-bottom: 10px; padding-left: 4px; }
.article-body code { padding: 2px 7px; border: 1px solid var(--border); border-radius: 6px; color: #ffd28b; background: var(--surface); font-size: .9em; }

.code-block {
  margin: 34px 0;
  padding: 26px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 18px;
  color: #d4d4d4;
  background: var(--surface);
  font: 14px/1.75 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  white-space: pre;
}
.code-block .folder { color: var(--brand-orange); }
.code-block .comment { color: #737373; }

.callout {
  margin: 42px 0;
  padding: 26px 28px;
  border-left: 3px solid var(--brand-orange);
  border-radius: 0 16px 16px 0;
  background: var(--surface-raised);
}
.callout strong { display: block; margin-bottom: 8px; color: var(--brand-orange); }
.callout p { margin: 0; }

.article-footer { margin-top: 88px; padding-top: 34px; border-top: 1px solid var(--border); color: var(--text-sub); }
.article-footer a { color: var(--text-main); text-decoration: underline; text-underline-offset: 4px; }

@media (max-width: 720px) {
  .header-inner, .page-shell, .article-shell { width: min(100% - 32px, 1120px); }
  .header-inner { min-height: 68px; }
  .header-nav > a:not(.lang) { display: none; }
  .lang { padding-left: 0; border-left: 0; }
  .page-shell { padding: 68px 0 88px; }
  .posts-hero { margin-bottom: 52px; }
  .posts-hero p, .article-lead { font-size: 17px; }
  .post-card { grid-template-columns: 1fr auto; gap: 14px 18px; padding: 30px 0; }
  .post-date { grid-column: 1 / -1; }
  .article-shell { padding: 52px 0 88px; }
  .back-link { margin-bottom: 44px; }
  .article-header { margin-bottom: 54px; }
  .article-body h2 { margin-top: 64px; font-size: 26px; }
  .code-block { margin-inline: -8px; padding: 20px; font-size: 12px; }
}