:root {
  --bg: #ffffff;
  --ink: #111111;
  --muted: rgba(17, 17, 17, 0.62);
  --line: rgba(17, 17, 17, 0.16);
  --content-width: min(1320px, calc(100vw - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans KR", "Noto Sans", sans-serif;
  font-size: 14px;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.archive-table td:nth-child(3) > a,
.detail-header h1 {
  font-weight: 700;
}

.archive-table td:nth-child(3) .cell-sub,
.archive-intro .cell-sub {
  font-weight: 400;
}

img {
  display: block;
  max-width: 100%;
}

.archive-shell,
.detail-shell {
  width: var(--content-width);
  margin: 0 auto;
  padding: 18px 0 48px;
}

.eyebrow,
.contact-list span {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.archive-header,
.detail-header,
.archive-meta,
.archive-copy,
.archive-filters,
.archive-evidence,
.archive-table-wrap,
.archive-method,
.detail-case-study,
.detail-loops,
.detail-hero,
.detail-table-wrap,
.detail-related,
.contact-footer {
  border-top: 1px solid var(--line);
  padding-top: 12px;
  margin-top: 18px;
}

.archive-header h1,
.detail-header h1 {
  margin: 4px 0 0;
  font-size: 24px;
  line-height: 1.3;
  font-weight: 500;
}

.archive-intro,
.archive-meta p,
.contact-footer p,
.contact-list a,
.detail-related a {
  color: var(--muted);
}

.cell-sub {
  display: block;
  margin-top: 2px;
  color: var(--muted);
}

.archive-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.archive-copy,
.archive-method {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.archive-statement {
  color: var(--ink);
}

.archive-evidence {
  display: block;
}

.evidence-list {
  margin-top: 8px;
}

.evidence-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.evidence-item h3,
.evidence-item p,
.method-list,
.capability-list {
  margin: 0;
}

.evidence-item h3 {
  font-size: 14px;
  font-weight: 700;
}

.evidence-index {
  color: var(--muted);
}

.method-list,
.capability-list {
  padding-left: 18px;
}

.method-list li,
.capability-list li {
  padding: 3px 0;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.filter-chip {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  padding: 6px 10px;
  cursor: pointer;
  font: inherit;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.filter-chip:hover,
.filter-chip.is-active {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.archive-table,
.detail-table {
  width: 100%;
  border-collapse: collapse;
}

.archive-table th,
.archive-table td,
.detail-table th,
.detail-table td {
  padding: 10px 10px 10px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.archive-table thead th,
.detail-table th {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.archive-table tr.is-hidden {
  display: none;
}

.archive-table tbody tr {
  transition: background-color 160ms ease, color 160ms ease;
}

.archive-table tbody tr:hover {
  background: var(--ink);
  color: var(--bg);
}

.archive-table tbody tr:hover td,
.archive-table tbody tr:hover a,
.archive-table tbody tr:hover .cell-sub {
  color: var(--bg);
}

.archive-table td:nth-child(1),
.archive-table td:nth-child(2),
.archive-table th:nth-child(1),
.archive-table th:nth-child(2) {
  width: 64px;
}

.archive-table td:nth-child(5),
.archive-table td:nth-child(6) {
  color: var(--muted);
}

.detail-hero img {
  width: 100%;
  border: 1px solid var(--line);
}

.case-study-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 1fr);
  gap: 24px;
}

.case-study-intro h2,
.case-study-metric p,
.loop-panel h3,
.contact-footer h2 {
  margin: 0;
}

.case-study-metric {
  padding: 12px 14px;
  border: 1px solid var(--line);
}

.loop-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.loop-panel {
  border: 1px solid var(--line);
  padding: 12px;
}

.loop-hypothesis {
  margin: 8px 0 12px;
  color: var(--muted);
}

.detail-related ul,
.contact-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}

.detail-related li,
.contact-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
}

.contact-list li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
}

@media (max-width: 840px) {
  .archive-meta {
    grid-template-columns: 1fr;
  }

  .archive-copy,
  .archive-method,
  .evidence-item,
  .case-study-intro,
  .loop-grid {
    grid-template-columns: 1fr;
  }

  .archive-shell,
  .detail-shell {
    width: min(100vw - 20px, 100%);
  }

  .archive-table,
  .archive-table thead,
  .archive-table tbody,
  .archive-table tr,
  .archive-table th,
  .archive-table td {
    display: block;
  }

  .archive-table thead {
    display: none;
  }

  .archive-table tr {
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
  }

  .archive-table td {
    border: 0;
    padding: 2px 0;
  }

  .contact-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}