/* =========================================================
   두잉 기고문(DIF Column) — 리더/목록 전용 스타일
   폰트: Pretendard 통일 · Black(900)/ExtraBold(800)/Bold(700)/Medium(500)
   브랜드: Deep Green + Gold
   ========================================================= */

.col-page { background: var(--paper-warm); }
.col-shell { max-width: 820px; margin: 0 auto; padding: 0 var(--gutter); }

/* 상단 읽기 진행 바 */
.col-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 1200;
  background: linear-gradient(90deg, var(--green-600), var(--gold-500)); transition: width .1s linear; }

/* ---------- 히어로 ---------- */
.col-hero { padding: clamp(40px, 7vw, 76px) 0 24px; }
.col-breadcrumb { font-size: .82rem; font-weight: 600; color: var(--muted); margin-bottom: 20px; }
.col-breadcrumb a { color: var(--green-600); text-decoration: none; }
.col-breadcrumb a:hover { text-decoration: underline; }
.col-breadcrumb span { color: var(--ink-soft); }
.col-back-btn { display: inline-flex; align-items: center; gap: 6px; font-size: .86rem; font-weight: 700;
  color: var(--green-700); background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 16px; text-decoration: none; margin-bottom: 20px; box-shadow: var(--shadow-sm);
  transition: transform .18s var(--ease), border-color .18s var(--ease); }
.col-back-btn:hover { transform: translateX(-2px); border-color: var(--green-600); }
.col-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: .76rem; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase; color: var(--gold-600); margin-bottom: 20px; }
.col-eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--gold-500); display: inline-block; }
.col-cat { display: inline-block; font-size: .78rem; font-weight: 700; color: var(--green-700);
  background: rgba(42,107,84,.1); border-radius: 999px; padding: 5px 13px; margin-bottom: 18px; }

/* 제목 — Black(900) */
.col-title { font-weight: 900; font-size: clamp(2rem, 5.2vw, 3.15rem); line-height: 1.18;
  letter-spacing: -0.035em; color: var(--green-900); margin: 0 0 18px; word-break: keep-all; }
/* 부제 — Medium(500) */
.col-sub { font-weight: 500; font-size: clamp(1.1rem, 2.8vw, 1.42rem); line-height: 1.5;
  letter-spacing: -0.01em; color: var(--green-600); margin: 0 0 26px; word-break: keep-all; }

.col-byline { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px;
  padding: 18px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.col-author { display: flex; align-items: center; gap: 11px; }
.col-avatar { width: 42px; height: 42px; border-radius: 50%; background: var(--green-800); color: var(--gold-400);
  display: grid; place-items: center; font-weight: 800; font-size: 1.1rem; }
.col-author-name { font-weight: 700; color: var(--ink); font-size: .98rem; line-height: 1.2; }
.col-author-title { font-weight: 500; color: var(--muted); font-size: .82rem; }
.col-meta { margin-left: auto; display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: .85rem; font-weight: 500; color: var(--muted); }
.col-meta b { color: var(--green-700); font-weight: 700; }

/* 대표 이미지 */
.col-cover { margin: 30px 0 8px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); background: #fff; }
.col-cover img { display: block; width: 100%; height: auto; }

/* 리드(요약) */
.col-lede { font-weight: 500; font-size: clamp(1.08rem, 2.4vw, 1.24rem); line-height: 1.75;
  color: var(--ink-soft); margin: 30px 0 10px; padding-left: 20px; border-left: 4px solid var(--gold-500); word-break: keep-all; }

/* 목차 */
.col-toc { margin: 30px 0 6px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.col-toc summary { cursor: pointer; list-style: none; padding: 16px 20px; font-weight: 800; color: var(--green-800); display: flex; justify-content: space-between; align-items: center; }
.col-toc summary::-webkit-details-marker { display: none; }
.col-toc summary::after { content: "목차 펼치기"; font-size: .78rem; font-weight: 600; color: var(--gold-600); }
.col-toc[open] summary::after { content: "접기"; }
.col-toc ol { margin: 0; padding: 0 20px 18px; list-style: none; counter-reset: toc; column-gap: 28px; }
.col-toc li { counter-increment: toc; padding: 7px 0; border-top: 1px dashed var(--paper-alt); }
.col-toc a { display: flex; gap: 10px; text-decoration: none; color: var(--ink-soft); font-weight: 500; font-size: .94rem; }
.col-toc a::before { content: counter(toc, decimal-leading-zero); color: var(--gold-600); font-weight: 800; font-variant-numeric: tabular-nums; }
.col-toc a:hover { color: var(--green-700); }

/* ---------- 본문 ---------- */
.col-body { padding: 10px 0 20px; font-size: 1.075rem; }
.col-body > p { font-weight: 500; line-height: 1.95; color: var(--ink-soft); margin: 0 0 1.25em; word-break: keep-all; }
.col-body strong { font-weight: 700; color: var(--green-700); }

/* 섹션 제목 — ExtraBold(800) + 번호 뱃지 */
.col-h2 { display: flex; align-items: baseline; gap: 14px; margin: 2.4em 0 .7em; padding-top: 1.1em;
  border-top: 2px solid var(--paper-alt); scroll-margin-top: 90px; }
.col-h2-num { flex: none; font-weight: 800; font-size: 1rem; color: #fff; background: var(--green-700);
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; transform: translateY(-4px); font-variant-numeric: tabular-nums; }
.col-h2-txt { font-weight: 800; font-size: clamp(1.45rem, 3.6vw, 1.95rem); line-height: 1.3;
  letter-spacing: -0.025em; color: var(--green-800); word-break: keep-all; }
/* 무번호 섹션(예: 출처) — 번호 뱃지 없이 제목만 */
.col-h2--plain { gap: 0; }
.col-h2--plain .col-h2-txt { font-size: clamp(1.3rem, 3vw, 1.6rem); }
/* 소제목 — Bold(700) */
.col-h3 { font-weight: 700; font-size: clamp(1.12rem, 2.5vw, 1.28rem); line-height: 1.4;
  letter-spacing: -0.02em; color: var(--green-700); margin: 2em 0 .6em; padding-left: 14px; border-left: 4px solid var(--gold-400); word-break: keep-all; }

/* 핵심 포인트 리스트 */
.col-points { list-style: none; margin: 0 0 1.4em; padding: 0; }
.col-points li { position: relative; padding: 10px 0 10px 30px; font-weight: 500; line-height: 1.8;
  color: var(--ink-soft); border-bottom: 1px solid var(--paper-alt); word-break: keep-all; }
.col-points li::before { content: ""; position: absolute; left: 4px; top: 19px; width: 9px; height: 9px;
  border-radius: 3px; background: var(--gold-500); }
.col-points li strong { color: var(--green-800); font-weight: 700; }

/* 표 */
.col-tablewrap { margin: 1.6em 0; overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow-sm); -webkit-overflow-scrolling: touch; }
.col-table { width: 100%; border-collapse: collapse; font-size: .95rem; background: #fff; min-width: 460px; }
.col-table thead th { background: var(--green-800); color: #fff; font-weight: 700; text-align: left;
  padding: 13px 16px; letter-spacing: -0.01em; white-space: nowrap; }
.col-table tbody th { background: var(--paper-warm); color: var(--green-800); font-weight: 700; text-align: left;
  padding: 12px 16px; vertical-align: top; }
.col-table td { padding: 12px 16px; color: var(--ink-soft); font-weight: 500; vertical-align: top; line-height: 1.65; border-top: 1px solid var(--line); }
.col-table tbody th { border-top: 1px solid var(--line); }
.col-table tbody tr:nth-child(even) td, .col-table tbody tr:nth-child(even) th { background: var(--paper-warm); }
.col-table strong { color: var(--green-700); }

/* 그림 */
.col-fig { margin: 2em 0; }
.col-fig img { display: block; width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow-sm); background: #fff; }
.col-fig figcaption { margin-top: 12px; text-align: center; font-size: .86rem; font-weight: 600; color: var(--muted); word-break: keep-all; }
.col-fig--diagram img { background: #f4f1e9; }

/* 출처·주석 */
.col-source { font-size: .84rem; font-weight: 500; color: var(--muted); margin: -0.6em 0 1.4em; }
.col-note { font-size: .92rem; font-weight: 500; color: var(--ink-soft); background: var(--paper-alt);
  border-radius: var(--radius-sm); padding: 14px 18px; margin: 1.2em 0; border-left: 3px solid var(--gold-500); word-break: keep-all; }

/* 태그 */
.col-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 0; }
.col-tag { font-size: .82rem; font-weight: 600; color: var(--green-700); background: rgba(42,107,84,.08);
  border-radius: 999px; padding: 6px 13px; }

/* 하단: 작성자 박스 + 이웃글 + 관련글 */
.col-foot { margin: 40px 0 0; padding: 28px 0 0; border-top: 2px solid var(--paper-alt); }
.col-signoff { background: var(--green-800); color: #fff; border-radius: var(--radius-lg); padding: 26px 28px; }
.col-signoff .s-en { font-size: .74rem; letter-spacing: .2em; color: var(--gold-400); font-weight: 700; text-transform: uppercase; }
.col-signoff h4 { font-weight: 800; font-size: 1.2rem; margin: 6px 0 8px; }
.col-signoff p { font-weight: 500; color: rgba(255,255,255,.86); font-size: .95rem; line-height: 1.7; margin: 0; }
.col-signoff .s-actions { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px; }

.col-adjacent { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 22px 0; }
.col-adj { display: block; text-decoration: none; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow-sm); transition: transform .2s var(--ease), box-shadow .2s var(--ease); }
.col-adj:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.col-adj .dir { font-size: .76rem; font-weight: 700; color: var(--gold-600); letter-spacing: .04em; }
.col-adj .t { font-weight: 700; color: var(--green-800); font-size: .96rem; line-height: 1.45; margin-top: 6px; word-break: keep-all; }
.col-adj.next { text-align: right; }

/* 관련 기고문 */
.col-more { margin: 34px 0 10px; }
.col-more h3 { font-weight: 800; color: var(--green-800); font-size: 1.15rem; margin: 0 0 16px; }
.col-more-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ---------- 목록 페이지 ---------- */
.cols-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
.ccard { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease); text-decoration: none; }
.ccard:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.ccard.is-feature { grid-column: 1 / -1; }
.ccard-media { aspect-ratio: 16 / 9; background: #f4f1e9; overflow: hidden; }
.ccard.is-feature .ccard-media { aspect-ratio: 21 / 9; }
.ccard-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ccard-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.ccard-cat { font-size: .74rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--gold-600); margin-bottom: 10px; }
.ccard-title { font-weight: 800; font-size: 1.22rem; line-height: 1.35; letter-spacing: -0.02em; color: var(--green-900); margin: 0 0 8px; word-break: keep-all; }
.ccard.is-feature .ccard-title { font-size: clamp(1.4rem, 3.2vw, 1.9rem); font-weight: 900; }
.ccard-sub { font-weight: 500; color: var(--green-600); font-size: .95rem; line-height: 1.5; margin: 0 0 10px; word-break: keep-all; }
.ccard-lede { font-weight: 500; color: var(--ink-soft); font-size: .92rem; line-height: 1.65; margin: 0 0 16px;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; word-break: keep-all; }
.ccard-meta { margin-top: auto; display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .82rem; font-weight: 600; color: var(--muted); }
.ccard-meta b { color: var(--green-700); font-weight: 700; }

.cols-intro { max-width: 760px; }
.cols-empty { text-align: center; color: var(--muted); padding: 60px 0; font-weight: 500; }

@media (max-width: 720px) {
  .col-meta { margin-left: 0; width: 100%; }
  .col-more-grid { grid-template-columns: 1fr; }
  .col-adjacent { grid-template-columns: 1fr; }
}