/* ============================================================
   건설칼럼 (목록 + 본문) — dhnco 스타일
   baronow 구조를 옮기되 색/타이포는 디에이치건설정보 톤으로
   ============================================================ */
:root {
  --col-navy: #15365f;
  --col-primary: #1f4f8b;
  --col-accent: #2f8ccf;
  --col-ink: #16233a;
  --col-muted: #5a6577;
  --col-line: #e5ebf3;
  --col-surface: #f6f8fb;
}

/* ── 목록 ── */
.col-list { background: var(--col-surface); }
.col-hero {
  padding: 120px 24px 46px;
  text-align: center;
  background: linear-gradient(160deg, #0f2947 0%, #15365f 55%, #1f4f8b 100%);
  color: #fff;
}
.col-hero .col-eyebrow { margin: 0 0 12px; color: #a7d3ff; font-size: 13px; font-weight: 800; letter-spacing: 0.16em; }
.col-hero h1 { margin: 0; font-size: clamp(30px, 4vw, 46px); font-weight: 850; letter-spacing: -0.03em; }
.col-hero .col-lead { max-width: 640px; margin: 16px auto 0; color: rgba(255,255,255,.82); font-size: 17px; line-height: 1.7; word-break: keep-all; }

.col-wrap { width: min(1120px, calc(100% - 44px)); margin: 0 auto; padding: 40px 0 90px; }
.col-cats { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin-bottom: 34px; }
.col-chip { font: inherit; font-size: 14px; font-weight: 700; color: #3a4657; background: #fff; border: 1px solid var(--col-line); border-radius: 999px; padding: 9px 18px; cursor: pointer; transition: 0.18s; }
.col-chip:hover { border-color: var(--col-accent); color: var(--col-primary); }
.col-chip.on { background: var(--col-navy); border-color: var(--col-navy); color: #fff; }

.col-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 960px) { .col-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .col-grid { grid-template-columns: 1fr; } }

.col-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--col-line); border-radius: 16px; overflow: hidden; box-shadow: 0 8px 22px rgba(15,34,51,.06); transition: transform .22s ease, box-shadow .22s ease; text-decoration: none; }
.col-card:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(15,34,51,.13); }
.col-card.hide { display: none; }
.col-thumb { aspect-ratio: 1.7/1; overflow: hidden; }
.col-thumb--ph { display: flex; align-items: center; justify-content: center; background: linear-gradient(140deg, #163a63, #1f4f8b 70%, #2f8ccf); position: relative; }
.col-thumb--ph::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 34px 34px; }
.col-thumb--ph span { position: relative; z-index: 1; color: #fff; font-size: 17px; font-weight: 800; letter-spacing: -0.02em; opacity: 0.95; }
.col-body { display: flex; flex-direction: column; flex: 1; padding: 20px 20px 18px; }
.col-tags { display: flex; align-items: center; gap: 10px; margin-bottom: 11px; }
.col-cat2 { font-size: 12px; font-weight: 800; color: var(--col-primary); background: #eaf1fb; border-radius: 999px; padding: 4px 11px; }
.col-tags time { font-size: 12.5px; color: #7a879c; }
.col-body h3 { font-size: 17px; font-weight: 800; color: var(--col-ink); letter-spacing: -0.02em; line-height: 1.5; margin: 0 0 9px; }
.col-body p { font-size: 14px; color: var(--col-muted); line-height: 1.7; flex: 1; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.col-meta { display: flex; justify-content: flex-end; margin-top: 15px; padding-top: 13px; border-top: 1px solid #eff3f9; }
.col-meta span { font-size: 13px; font-weight: 700; color: var(--col-primary); }

/* ── 본문 ── */
.col-article { background: #fff; }
.art-band { padding: 120px 24px 58px; text-align: center; background: linear-gradient(160deg, #0f2947 0%, #15365f 55%, #1f4f8b 100%); }
.art-band .art-cat { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.34); color: #cfe4ff; font-size: 13px; font-weight: 700; padding: 5px 15px; border-radius: 999px; margin-bottom: 16px; }
.art-band h1 { max-width: 820px; margin: 0 auto; font-size: clamp(24px, 3.4vw, 36px); font-weight: 850; color: #fff; letter-spacing: -0.03em; line-height: 1.45; }
.art-band .art-meta { margin-top: 16px; font-size: 14px; color: #9fb6dd; }
.art-band .art-meta b { color: #cfe0ff; font-weight: 700; }

.art-wrap { max-width: 800px; margin: 0 auto; padding: 52px 24px 24px; }
.art-lead { background: #f2f7fd; border-left: 4px solid var(--col-primary); border-radius: 0 14px 14px 0; padding: 24px 26px; margin-bottom: 38px; }
.art-lead strong { display: block; font-size: 15px; font-weight: 800; color: var(--col-primary); margin-bottom: 9px; }
.art-lead p { font-size: 15.5px; color: #33415c; line-height: 1.85; margin: 0 0 12px; }
.art-lead p:last-child { margin-bottom: 0; }
.art-lead ul { margin: 0 0 4px; padding-left: 20px; }
.art-lead ul li { font-size: 15px; color: #33415c; line-height: 1.9; margin: 5px 0; }

.art-toc { border: 1px solid var(--col-line); border-radius: 14px; padding: 22px 26px; margin-bottom: 44px; background: #fff; }
.art-toc strong { display: block; font-size: 14px; font-weight: 800; color: var(--col-ink); margin-bottom: 12px; }
.art-toc ol { margin: 0; padding-left: 20px; }
.art-toc li { margin: 6px 0; }
.art-toc a { font-size: 14.5px; color: var(--col-primary); text-decoration: none; }
.art-toc a:hover { text-decoration: underline; }

.art-wrap h2 { font-size: clamp(20px, 2.4vw, 25px); font-weight: 800; color: var(--col-ink); letter-spacing: -0.02em; margin: 52px 0 18px; scroll-margin-top: 90px; }
.art-wrap h2::before { content: ""; display: block; width: 34px; height: 4px; border-radius: 2px; background: var(--col-primary); margin-bottom: 14px; }
.art-wrap h3 { font-size: 17.5px; font-weight: 800; color: #1b2b3d; margin: 30px 0 12px; }
.art-wrap p { font-size: 16px; color: #3a4657; line-height: 1.95; margin: 0 0 18px; }
.art-wrap p b { color: var(--col-ink); }
.art-wrap ul { margin: 0 0 20px; padding-left: 22px; }
.art-wrap ul li { font-size: 15.5px; color: #3a4657; line-height: 1.9; margin: 7px 0; }
@media (max-width: 560px) { .art-wrap p br, .art-lead p br { display: none; } }

.art-tbl { width: 100%; border-collapse: collapse; margin: 8px 0 26px; font-size: 15px; }
.art-tbl th { background: var(--col-navy); color: #fff; font-weight: 700; padding: 13px 14px; text-align: left; border: 1px solid var(--col-navy); }
.art-tbl td { padding: 13px 14px; border: 1px solid var(--col-line); color: #3a4657; line-height: 1.7; vertical-align: top; }
.art-tbl tr td:first-child { font-weight: 700; color: var(--col-ink); background: #f6f9fd; white-space: nowrap; }
@media (max-width: 560px) { .art-tbl { font-size: 13.5px; } .art-tbl th, .art-tbl td { padding: 10px; } }

.art-note { background: #fff8ee; border: 1px solid #f2e2c4; border-radius: 12px; padding: 17px 20px; font-size: 14.5px; color: #6b5322; line-height: 1.8; margin: 0 0 22px; }
.art-note b { color: #8a6511; }
.art-note p { font-size: inherit; color: inherit; line-height: inherit; margin: 0 0 9px; }
.art-note p:last-child { margin-bottom: 0; }
.art-wrap .ta-c { text-align: center; }
.art-wrap .ta-r { text-align: right; }

/* 본문 뒤 CTA·관련칼럼·목록 */
.art-after { padding-top: 8px; padding-bottom: 80px; }
.col-cta { display: flex; align-items: center; justify-content: center; height: 54px; border-radius: 14px; background: var(--col-primary); color: #fff; font-size: 16px; font-weight: 800; text-decoration: none; box-shadow: 0 14px 30px rgba(31,79,139,.28); transition: background .2s ease, transform .2s ease; }
.col-cta:hover { background: var(--col-navy); transform: translateY(-1px); }
.art-links { background: #f6f9fd; border: 1px solid var(--col-line); border-radius: 14px; padding: 22px 24px; margin: 30px 0 8px; }
.art-links strong { display: block; font-size: 14.5px; font-weight: 800; color: var(--col-ink); margin-bottom: 12px; }
.art-links a { display: block; font-size: 15px; color: var(--col-primary); font-weight: 600; text-decoration: none; padding: 9px 0; border-bottom: 1px dashed var(--col-line); }
.art-links a:last-child { border-bottom: 0; }
.art-links a:hover { text-decoration: underline; }
.col-back { display: inline-block; margin-top: 22px; color: var(--col-muted); font-size: 15px; font-weight: 700; text-decoration: none; }
.col-back:hover { color: var(--col-primary); }

@media (max-width: 900px) {
  .col-hero, .art-band { padding-top: 96px; }
}