@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.css');
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;1,9..144,400&family=Space+Mono:wght@400;700&family=Noto+Serif+KR:wght@400;500;600&display=swap');

/* ── Editorial Serif / Gothic tokens ─────────────────────────────────
   Source: DESIGN.md — Cohere editorial system, adapted to a serif
   (Fraunces) display + gothic (Pretendard) body pairing.            */
:root {
  --font-serif: "Fraunces", "Noto Serif KR", Georgia, "Times New Roman", serif;
  --font-sans:  "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Apple SD Gothic Neo", "Noto Sans KR", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono:  "Space Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --fg-primary: #212121;
  --fg-secondary: #52525b;
  --fg-tertiary: #93939f;
  --fg-muted: #75758a;
  --fg-disabled: #b8b8bf;
  --fg-inverse: #ffffff;
  --ink: #17171c;

  --accent: #ff7759;
  --accent-soft: #ffad9b;
  --accent-wash: #fff1ec;
  --link: #1863dc;
  --link-hover: #124fb0;

  --bg-primary: #ffffff;
  --bg-canvas: #f8f7f3;
  --bg-secondary: #f1efe9;
  --bg-stone: #eeece7;
  --bg-tertiary: #e6e3db;

  --line-default: #e3e0d8;
  --line-strong: #d4d1c9;

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-pill: 32px;
  --radius-full: 9999px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-base: 200ms;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg-canvas);
  color: var(--fg-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: flex-end;
  padding: 16px 24px;
  background: rgba(248, 247, 243, 0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-default);
}

.header-nav {
  display: flex;
  gap: 8px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: var(--bg-primary);
  color: var(--fg-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: border-color var(--dur-base) var(--ease), color var(--dur-base) var(--ease);
}

.back-link:hover {
  color: var(--fg-primary);
  border-color: var(--ink);
}

.page-shell {
  width: min(820px, calc(100% - 48px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

.intro {
  margin-bottom: 44px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: auto;
  margin: 0 0 18px;
  padding: 0;
  background: none;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.intro h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6vw, 3.6rem);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.022em;
}

.intro-copy {
  margin: 16px 0 0;
  color: var(--fg-secondary);
  font-size: 17px;
  line-height: 1.55;
}

.post-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line-default);
}

.post-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-default);
  transition: opacity var(--dur-base) var(--ease);
}

.post-date {
  color: var(--fg-tertiary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  padding-top: 6px;
}

.post-content h2 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.post-content h2 a {
  color: var(--fg-primary);
  transition: color var(--dur-base) var(--ease);
}

.post-content h2 a:hover {
  color: var(--accent);
}

.post-summary {
  margin: 0;
  color: var(--fg-secondary);
  font-size: 15px;
  line-height: 1.55;
}

.empty-state {
  text-align: center;
  padding: 64px 0;
  color: var(--fg-tertiary);
}

.empty-state h2 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
}

.empty-state p {
  margin: 0;
  font-size: 15px;
}

/* Post detail */
.detail-shell {
  width: min(760px, calc(100% - 48px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.post-header {
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line-default);
}

.post-header h1 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.022em;
}

.post-meta {
  color: var(--fg-tertiary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.post-body {
  font-size: 16px;
  line-height: 1.78;
  color: var(--fg-secondary);
}

.post-body h2 {
  margin: 40px 0 14px;
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.26;
  letter-spacing: -0.015em;
  color: var(--fg-primary);
}

.post-body h3 {
  margin: 30px 0 10px;
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 500;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--fg-primary);
}

.post-body p {
  margin: 0 0 18px;
}

.post-body ul,
.post-body ol {
  margin: 0 0 18px;
  padding-left: 24px;
}

.post-body li {
  margin-bottom: 6px;
}

.post-body a {
  color: var(--link);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-body a:hover {
  color: var(--link-hover);
  text-decoration: none;
}

.post-body strong {
  color: var(--fg-primary);
  font-weight: 700;
}

.post-body code {
  padding: 2px 6px;
  border: 1px solid var(--line-default);
  border-radius: var(--radius-s);
  background: var(--bg-secondary);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.post-body pre {
  padding: 16px;
  border: 1px solid var(--line-default);
  border-radius: var(--radius-m);
  background: var(--bg-secondary);
  overflow-x: auto;
  margin: 0 0 18px;
}

.post-body pre code {
  padding: 0;
  border: none;
  background: none;
}

.post-body blockquote {
  margin: 0 0 18px;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--accent);
  background: none;
  border-radius: 0;
}

.post-body blockquote p {
  margin: 0;
  color: var(--fg-secondary);
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.5;
}

.post-body em { font-style: italic; }

.post-body figure {
  margin: 28px 0;
}

.post-body figure img {
  width: 100%;
  border: 1px solid var(--line-default);
  border-radius: var(--radius-m);
  background: var(--bg-primary);
}

.post-body figcaption {
  margin-top: 11px;
  color: var(--fg-tertiary);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

.post-body img { border-radius: var(--radius-s); }

.post-body hr {
  margin: 38px 0;
  border: 0;
  border-top: 1px solid var(--line-default);
}

.post-body .table-wrap {
  margin: 0 0 22px;
  overflow-x: auto;
  border: 1px solid var(--line-default);
  border-radius: var(--radius-m);
}

.post-body table {
  border-collapse: collapse;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.post-body th,
.post-body td {
  padding: 9px 14px;
  text-align: right;
  white-space: nowrap;
  border-bottom: 1px solid var(--line-default);
}

.post-body th:first-child,
.post-body td:first-child { text-align: left; }

.post-body thead th {
  color: var(--fg-tertiary);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.02em;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--line-strong);
}

.post-body tbody tr:last-child td { border-bottom: none; }

.post-body tbody tr:hover { background: var(--bg-canvas); }

.load-error {
  text-align: center;
  padding: 48px 0;
  color: var(--fg-tertiary);
  font-size: 15px;
}

.footer {
  margin-top: 48px;
  padding: 24px 0;
  border-top: 1px solid var(--line-default);
  color: var(--fg-tertiary);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-align: center;
}

@media (max-width: 640px) {
  .post-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .intro h1 { font-size: 2.2rem; }
  .post-header h1 { font-size: 1.9rem; }
}