* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink-1);
  font-family: var(--sans-ko);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
hr { border: 0; border-top: 1px solid var(--hairline); margin: 0; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* HEADER */
.site-header {
  border-bottom: 1px solid var(--hairline);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
.site-header .row {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 24px 0 16px;
}
.brand {
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144, "SOFT" 30;
}
.brand .dot { color: var(--accent); }
.nav {
  display: flex; gap: 28px; align-items: baseline;
}
.nav a {
  font-family: var(--sans-ui);
  font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-2);
  padding: 6px 0;
  border-bottom: 1.5px solid transparent;
  transition: color 100ms, border-color 200ms;
}
.nav a:hover, .nav a.active { color: var(--ink-1); border-bottom-color: var(--accent); }
.theme-toggle {
  width: 34px; height: 34px; border: 1px solid var(--hairline-strong);
  background: transparent; cursor: pointer; border-radius: 2px;
  color: var(--ink-2); font-size: 14px;
}

/* HERO BAR */
.section-eyebrow {
  font-family: var(--sans-ui);
  font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--accent);
  margin: 0 0 12px;
}
h1.title-feature {
  font-family: var(--serif-display);
  font-weight: 700;
  font-variation-settings: "opsz" 144, "SOFT" 20;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0;
}
.dek {
  font-family: var(--serif-body);
  font-style: italic;
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 60ch;
  margin: 20px 0 0;
}

/* FEATURE GRID */
.feature-row {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px;
  padding: 56px 0;
  border-bottom: 1px solid var(--hairline);
}
.feature-row .meta {
  display: flex; gap: 16px; align-items: center; margin-top: 28px;
  font-family: var(--sans-ui); font-size: 13px; color: var(--ink-3);
}
.feature-row .meta .cat {
  color: var(--accent); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 11px;
}
.feature-img {
  height: 100%; min-height: 320px;
  background: linear-gradient(135deg, #1F2937 0%, #475569 100%);
  border-radius: 2px;
  position: relative; overflow: hidden;
}
.feature-img::after {
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(45deg, transparent 0 12px, rgba(0,0,0,0.06) 12px 13px);
}

/* SECONDARY ROW */
.secondary-row {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 48px;
  padding: 56px 0;
  border-bottom: 1px solid var(--hairline);
}
.card {
  display: flex; flex-direction: column; gap: 18px;
}
.card .thumb {
  height: 220px; border-radius: 2px;
  background: linear-gradient(135deg, var(--accent) 0%, #BF8E6E 100%);
}
.card.alt .thumb {
  background: linear-gradient(160deg, #334155 0%, #0F172A 100%);
}
.card .cat {
  font-family: var(--sans-ui); font-size: 11px; font-weight: 700;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.14em;
}
.card h2 {
  font-family: var(--serif-display); font-weight: 700;
  font-variation-settings: "opsz" 60, "SOFT" 20;
  font-size: 28px; line-height: 1.15; letter-spacing: -0.02em;
  margin: 0;
}
.card p {
  font-family: var(--serif-body); font-size: 15px; line-height: 1.55;
  color: var(--ink-2); margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card .meta {
  font-family: var(--sans-ui); font-size: 12px; color: var(--ink-3);
  display: flex; gap: 12px;
}

/* CHRONOLOGICAL LIST */
.chronos {
  padding: 56px 0;
  display: grid; grid-template-columns: 2fr 1fr; gap: 80px;
}
.list h3 {
  font-family: var(--sans-ui); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--ink-3); margin: 0 0 28px; padding-bottom: 16px; border-bottom: 1px solid var(--hairline);
}
.row-entry {
  display: grid; grid-template-columns: 96px 96px 1fr; gap: 24px; align-items: baseline;
  padding: 18px 0; border-bottom: 1px solid var(--hairline);
  font-family: var(--serif-body);
}
.row-entry:hover { background: rgba(124,74,42,0.04); }
.row-entry .date {
  font-family: var(--tabular); font-feature-settings: "tnum";
  font-size: 13px; color: var(--ink-3);
}
.row-entry .cat {
  font-family: var(--sans-ui); font-size: 11px; font-weight: 700;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.12em;
}
.row-entry .title-row {
  font-size: 17px; line-height: 1.45; color: var(--ink-1); font-weight: 500;
}
.row-entry .title-row em {
  font-style: italic; color: var(--ink-2); font-size: 14px; display: block; margin-top: 4px;
  font-family: var(--serif-body);
}

/* SIDEBAR */
.sidebar { position: sticky; top: 96px; align-self: start; }
.sidebar h4 {
  font-family: var(--sans-ui); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--ink-3); margin: 0 0 16px;
}
.sidebar .cat-list a {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--serif-body); font-size: 16px; padding: 10px 0;
  border-bottom: 1px solid var(--hairline);
}
.sidebar .cat-list a:hover { color: var(--accent); }
.sidebar .cat-list .count {
  font-family: var(--tabular); font-feature-settings: "tnum";
  font-size: 12px; color: var(--ink-4);
}
.sidebar .search {
  display: flex; gap: 0; margin-bottom: 32px;
  border-bottom: 1.5px solid var(--ink-1); padding-bottom: 8px;
}
.sidebar .search input {
  flex: 1; border: 0; background: transparent;
  font-family: var(--serif-body); font-size: 17px; color: var(--ink-1);
  outline: none;
}
.sidebar .search button {
  border: 0; background: transparent; cursor: pointer; color: var(--ink-1);
  font-family: var(--sans-ui); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
}
.sidebar-block { margin-bottom: 48px; }

/* BUTTONS / COMPONENTS */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans-ui); font-size: 13px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  padding: 12px 24px;
  border-radius: 2px; cursor: pointer; transition: all 150ms;
}
.btn.primary { background: var(--ink-1); color: var(--bg); border: 1px solid var(--ink-1); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.btn.ghost { background: transparent; color: var(--ink-1); border: 1px solid var(--ink-1); }
.btn.ghost:hover { background: var(--ink-1); color: var(--bg); }
.btn.link { background: transparent; color: var(--accent); border: 0; padding: 8px 0; border-bottom: 1.5px solid var(--accent); border-radius: 0; }

/* READING SAMPLE */
.reading {
  padding: 80px 0;
  background: var(--bg);
}
.reading article {
  max-width: 720px; margin: 0 auto;
}
.reading .eyebrow {
  font-family: var(--sans-ui); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--accent); margin-bottom: 16px;
}
.reading h1 {
  font-family: var(--serif-display); font-weight: 700;
  font-variation-settings: "opsz" 144, "SOFT" 20;
  font-size: clamp(36px, 4.5vw, 56px); line-height: 1.05;
  letter-spacing: -0.022em; margin: 0 0 24px;
}
.reading .byline {
  font-family: var(--sans-ui); font-size: 13px; color: var(--ink-3);
  border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
  padding: 16px 0; margin: 32px 0 48px;
  display: flex; justify-content: space-between;
}
.reading p {
  font-family: var(--sans-ko); font-size: 17px; line-height: 1.85;
  color: var(--ink-1); margin: 0 0 24px;
}
.reading p.dropcap::first-letter {
  font-family: var(--serif-display); font-weight: 900;
  float: left; font-size: 64px; line-height: 0.85;
  padding: 8px 12px 0 0; color: var(--accent);
}
.reading blockquote {
  border-left: 2px solid var(--accent); padding: 4px 0 4px 24px;
  font-family: var(--serif-body); font-style: italic; font-size: 20px;
  line-height: 1.55; color: var(--ink-2); margin: 32px 0;
}

/* FOOTER */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 48px 0; margin-top: 96px;
  font-family: var(--sans-ui); font-size: 12px; color: var(--ink-3);
}
.site-footer .row { display: flex; justify-content: space-between; }

@media (max-width: 900px) {
  .feature-row, .secondary-row, .chronos { grid-template-columns: 1fr; gap: 32px; padding: 40px 0; }
  .sidebar { position: static; }
  .row-entry { grid-template-columns: 80px 1fr; }
  .row-entry .cat { grid-column: 1 / 2; }
}

/* About page overrides */
.about-stat-card { border-radius: var(--radius-card); box-shadow: none; border: 1px solid var(--hairline); }
.about-blog-card { border-radius: var(--radius-card); box-shadow: none; border: 1px solid var(--hairline); }
.about-pipeline-card { border-radius: var(--radius-card); box-shadow: none; border: 1px solid var(--hairline); }
.about-stat-num { font-family: var(--tabular); font-feature-settings: "tnum"; }

.reading article h2 { font-family: var(--serif-display); font-weight: 700; font-size: 28px; line-height: 1.2; margin: 48px 0 16px; color: var(--ink-1); letter-spacing: -0.02em; }
.reading article h3 { font-family: var(--serif-display); font-weight: 700; font-size: 22px; line-height: 1.25; margin: 36px 0 12px; color: var(--ink-1); }
.reading article ul, .reading article ol { font-family: var(--sans-ko); font-size: 17px; line-height: 1.85; color: var(--ink-1); padding-left: 24px; margin: 0 0 24px; }
.reading article li { margin-bottom: 8px; }
.reading article a { color: var(--accent); border-bottom: 1px solid var(--hairline-strong); transition: border-color var(--dur-short); }
.reading article a:hover { border-bottom-color: var(--accent); }
.reading article img { max-width: 100%; height: auto; border-radius: var(--radius-image); margin: 32px 0; display: block; }
.reading article img + em, .reading article figcaption { font-family: var(--sans-ui); font-size: 12px; color: var(--ink-3); display: block; text-align: center; margin: -16px 0 32px; }
.reading article code { font-family: var(--mono); font-size: 0.9em; background: rgba(15,23,42,0.06); padding: 2px 6px; border-radius: 2px; }
.reading article pre { font-family: var(--mono); font-size: 14px; background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--radius-card); padding: 16px 20px; overflow-x: auto; margin: 32px 0; line-height: 1.6; }
.reading article pre code { background: transparent; padding: 0; }

.reading-progress { position: fixed; top: 0; left: 0; height: 1px; background: var(--accent); width: 0; z-index: 100; transition: width 50ms linear; }

.reading-grid {
  display: grid;
  grid-template-columns: 200px 720px;
  gap: 80px;
  max-width: 1000px;
  margin: 0 auto;
  align-items: start;
}
.marginalia {
  position: sticky;
  top: 120px;
  align-self: start;
  font-family: var(--sans-ui);
  font-size: 12px;
  color: var(--ink-3);
  border-right: 1px solid var(--hairline);
  padding-right: 24px;
}
.marginalia-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}
.marginalia-block:last-child { border-bottom: 0; }
.marginalia-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-3);
}
.marginalia-value {
  font-family: var(--serif-body);
  font-size: 15px;
  color: var(--ink-1);
  font-style: normal;
}
.marginalia-value[href] { color: var(--accent); border-bottom: 1px solid var(--hairline-strong); }
.marginalia-value[href]:hover { border-bottom-color: var(--accent); }

@media (max-width: 900px) {
  .reading-grid { grid-template-columns: 1fr; gap: 0; max-width: 720px; }
  .marginalia {
    position: static; border-right: 0; border-bottom: 1px solid var(--hairline);
    padding-right: 0; margin-bottom: 32px; padding-bottom: 16px;
    display: flex; flex-wrap: wrap; gap: 24px;
  }
  .marginalia-block { padding: 0; border-bottom: 0; }
}

