/* ==========================================================================
   column.css — 대표원장 칼럼 영역(column_index + column_2026_NN) 전용 스타일
   2026-09-15  재디자인판 PDF(흰 바탕 · Pretendard · 버건디 #a31f34 · 얇은 괘선 · 직각)와
   같은 인상으로 통일. 사이트 공통 헤더·푸터·오시는길은 건드리지 않는다.
   글꼴은 <main> 안에서만 Pretendard — 헤더·푸터는 다른 페이지와 같은 글꼴을 유지.
   ========================================================================== */
:root {
  --pdf-ink: #1c1c1e;
  --pdf-sub: #6b6b70;
  --pdf-line: #d8d8dc;
  --pdf-rule: #181818;
  --pdf-red: #a31f34;
  --pdf-faint: #f7f6f4;
  --pdf-font: "Pretendard Variable", "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

/* ---------- 바탕 · 글꼴 ---------- */
body { background: #fff !important; }
main { background: #fff; color: var(--pdf-ink); font-family: var(--pdf-font); letter-spacing: -0.01em; }
main .eyebrow { color: var(--pdf-red); letter-spacing: 0.14em; font-size: 0.74rem; }
main .eyebrow::before { background: var(--pdf-red); }

/* ---------- 버튼: 직각, 검정/흰 ---------- */
main .btn { border-radius: 2px; font-weight: 600; letter-spacing: -0.01em; padding: 12px 22px; }
main .btn-primary { background: var(--pdf-ink); color: #fff; box-shadow: none; }
main .btn-primary:hover { background: var(--pdf-red); transform: none; box-shadow: none; }
main .btn-ghost { background: #fff; border-color: var(--pdf-ink); color: var(--pdf-ink); }
main .btn-ghost:hover { background: var(--pdf-faint); border-color: var(--pdf-ink); }

/* ==========================================================================
   칼럼 본문 페이지 (column_2026_NN.html)
   ========================================================================== */
.col-header { text-align: left; padding-bottom: 28px; }
.col-header .container { max-width: 880px; }
.col-breadcrumb { margin-bottom: 40px; font-size: 0.82rem; color: var(--pdf-sub); }
.col-breadcrumb a { color: var(--pdf-sub); }
.col-breadcrumb-sep { color: var(--pdf-line); }
.col-header .eyebrow { justify-content: flex-start; margin: 0 0 12px; padding-top: 26px; border-top: 2px solid var(--pdf-rule); width: 100%; }
.col-header .eyebrow::before { display: none; }
.col-header h1 { font-weight: 700; letter-spacing: -0.035em; line-height: 1.3; font-size: clamp(1.9rem, 3.2vw, 2.9rem); max-width: 720px; color: var(--pdf-ink); }
.col-header h1 .accent { color: var(--pdf-ink); }
.col-header .sub { margin: 0; max-width: 620px; color: #3c3c40; font-size: 1.05rem; }
.col-header-meta { margin-top: 28px; padding: 14px 0; border-top: 1px solid var(--pdf-line); border-bottom: 1px solid var(--pdf-line); display: flex; justify-content: flex-start; gap: 18px; font-size: 0.85rem; color: var(--pdf-sub); }
.col-header-meta strong { color: var(--pdf-ink); font-weight: 600; }
.col-header-meta .dot { background: var(--pdf-line); }
.col-header-cta { justify-content: flex-start; margin-top: 24px; }

/* 캐로셀: 카드 껍데기 제거, 지면은 얇은 회색 테두리 하나 */
.viewer-frame { max-width: 880px; padding: 0; border: 0; border-radius: 0; box-shadow: none; background: transparent; }
.viewer-stage { max-width: 720px; border-radius: 0; background: #fff; border: 1px solid var(--pdf-line); box-shadow: none; }
.viewer-page { background: #fff; }
.viewer-watermark { color: rgba(28,28,30,0.28); font-weight: 500; letter-spacing: 0.04em; }
.viewer-arrow { border-radius: 0; background: #fff; border: 1px solid var(--pdf-line); box-shadow: none; color: var(--pdf-ink); width: 44px; height: 44px; }
.viewer-arrow:hover { background: var(--pdf-ink); color: #fff; transform: translateY(-50%); }
.viewer-arrow:disabled:hover { background: #fff; color: var(--pdf-ink); }
.viewer-indicator { max-width: 720px; }
.viewer-counter { font-weight: 600; }
.viewer-progress { height: 2px; border-radius: 0; background: var(--pdf-line); }
.viewer-progress-bar { background: var(--pdf-red); border-radius: 0; }
.viewer-hint { color: var(--pdf-sub); }
.viewer-hint kbd { border-radius: 2px; background: #fff; border-color: var(--pdf-line); }

/* 핵심 정리 · FAQ · 관련 진료 (항상 펼쳐진 요약 — 검색·AI 답변 엔진용) */
.col-summary-section { padding: 8px 0 40px; }
.col-summary { max-width: 720px; margin: 0 auto; }
.col-summary h2 { font-size: clamp(1.2rem, 1.8vw, 1.4rem); font-weight: 700; letter-spacing: -0.03em; margin: 48px 0 16px; padding-top: 20px; border-top: 2px solid var(--pdf-rule); color: var(--pdf-ink); }
.col-summary h2:first-child { margin-top: 8px; }
.col-summary .kicker { display: block; color: var(--pdf-red); font-size: 0.74rem; letter-spacing: 0.14em; font-weight: 700; margin-bottom: 6px; }
.col-keypoints { list-style: none; margin: 0; padding: 0; counter-reset: kp; }
.col-keypoints li { counter-increment: kp; display: grid; grid-template-columns: 28px 1fr; gap: 14px; align-items: start; padding: 14px 16px; margin-bottom: 10px; background: var(--pdf-faint); border: 0.6px solid #d4d1ce; line-height: 1.75; font-size: 1rem; }
.col-keypoints li::before { content: counter(kp); width: 26px; height: 26px; border: 1px solid var(--pdf-red); border-radius: 50%; color: var(--pdf-red); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 600; background: #fff; margin-top: 1px; }
.col-faq-item { margin-bottom: 22px; }
.col-faq-item h3 { font-size: 1.02rem; font-weight: 700; margin: 0 0 8px; padding: 10px 14px; background: var(--pdf-faint); border: 0.6px solid #d4d1ce; border-left: 2px solid var(--pdf-red); line-height: 1.6; }
.col-faq-item p { margin: 0; padding: 0 14px; line-height: 1.85; color: var(--pdf-ink); }
.col-related { display: flex; flex-wrap: wrap; gap: 10px; }
.col-related a { border: 1px solid var(--pdf-ink); padding: 9px 14px; font-size: 0.9rem; font-weight: 600; border-radius: 2px; color: var(--pdf-ink); transition: background 0.2s ease, color 0.2s ease; }
.col-related a:hover { background: var(--pdf-ink); color: #fff; }

/* 접이식 전문: 흰 바탕, 위아래 괘선만 */
.col-content-section { background: #fff; border-top: 0; padding-top: 8px; }
.col-content { max-width: 720px; }
.col-content-toggle { border-radius: 0; border: 0; border-top: 2px solid var(--pdf-rule); border-bottom: 1px solid var(--pdf-line); background: #fff; padding: 20px 4px; }
.col-content-toggle:hover { border-bottom-color: var(--pdf-ink); }
.col-content-toggle-icon { border-radius: 0; background: #fff; border: 1px solid var(--pdf-ink); color: var(--pdf-ink); width: 34px; height: 34px; }
.col-content-toggle-text { font-weight: 600; }
.col-content-toggle-text small { color: var(--pdf-sub); }
.col-content-toggle-chev { color: var(--pdf-ink); }
.col-content-body-inner { font-family: var(--pdf-font); color: var(--pdf-ink); line-height: 1.9; font-size: 1.02rem; word-break: keep-all; }
.col-content-body-inner h2 { font-family: var(--pdf-font); font-weight: 700; letter-spacing: -0.03em; font-size: clamp(1.3rem, 2vw, 1.55rem); border-bottom: 0; border-top: 1.5px solid var(--pdf-rule); padding: 22px 0 0; margin: 52px 0 18px; color: var(--pdf-ink); }
.col-content-body-inner h2:first-child { margin-top: 28px; }
.col-content-body-inner h3 { font-family: var(--pdf-font); color: var(--pdf-ink); font-weight: 700; font-size: 1.02rem; margin: 30px 0 8px; padding-bottom: 8px; border-bottom: 0.6px solid #cfcfcf; }
.col-content-body-inner strong { color: var(--pdf-ink); font-weight: 600; }
.col-content-body-inner li { margin-bottom: 8px; }
.col-content-body-inner .faq-q { font-weight: 700; margin: 24px 0 6px; padding: 10px 14px; background: var(--pdf-faint); border: 0.6px solid #d4d1ce; border-left: 2px solid var(--pdf-red); }
.col-content-body-inner .faq-a { border-left: 0; padding-left: 14px; }
.col-content-body-inner .ref-list { color: #3c3c40; font-size: 0.86rem; letter-spacing: 0; }

/* 공유/다운로드: 검정 카드 → 흰 지면 + 괘선 */
.share-card { border-radius: 0; background: #fff; color: var(--pdf-ink); box-shadow: none; border-top: 2px solid var(--pdf-rule); border-bottom: 1px solid var(--pdf-line); padding: 32px 0 36px; max-width: 720px; }
.share-card .eyebrow { color: var(--pdf-red); }
.share-card .eyebrow::before { background: var(--pdf-red); }
.share-card h3 { color: var(--pdf-ink); font-weight: 700; letter-spacing: -0.03em; }
.share-card p { color: #3c3c40; }
.share-card .btn-primary { background: var(--pdf-ink); color: #fff; }
.share-card .btn-primary:hover { background: var(--pdf-red); }
.share-card .btn-ghost { background: #fff; border-color: var(--pdf-ink); color: var(--pdf-ink); }
.share-card .btn-ghost:hover { background: var(--pdf-faint); }
.disclaimer { color: var(--pdf-sub); border-top: 0; max-width: 720px; font-size: 0.82rem; }

/* ==========================================================================
   칼럼 목록 페이지 (column_index.html)
   ========================================================================== */
.page-hero .section-title, .section-header .section-title { font-weight: 700; letter-spacing: -0.035em; color: var(--pdf-ink); }
.page-hero .section-title .accent, .section-header .section-title .accent { color: var(--pdf-ink); }
.section-subtitle { color: #3c3c40; }
.print-notice, .intent-block { border-radius: 0; box-shadow: none; background: #fff; border: 0; border-top: 2px solid var(--pdf-rule); border-bottom: 1px solid var(--pdf-line); }
.print-notice-icon { border-radius: 0; background: #fff; border: 1px solid var(--pdf-ink); color: var(--pdf-ink); }
.print-notice-text strong, .intent-block h3 { color: var(--pdf-ink); }
.intent-block h3 { font-weight: 700; letter-spacing: -0.03em; }

.series-grid { gap: 32px; }
.col-card-link { border-radius: 0; background: #fff; border: 1px solid var(--pdf-line); box-shadow: none; }
.col-card-link:hover { transform: none; box-shadow: none; border-color: var(--pdf-ink); }
.col-card-cover { background: #fff; border-bottom: 1px solid var(--pdf-line); }
.col-card-link:hover .col-card-cover img { transform: none; }
.col-card-badge { top: 14px; left: auto; right: 14px; border-radius: 0; background: #fff; color: var(--pdf-ink); border: 1px solid var(--pdf-ink); box-shadow: none; font-weight: 600; letter-spacing: 0.06em; }
.col-card-badge.is-current { background: var(--pdf-red); border-color: var(--pdf-red); color: #fff; }
.col-card-body { padding: 24px 24px 26px; }
.col-card-vol { color: var(--pdf-red); font-weight: 700; letter-spacing: 0.14em; font-size: 0.74rem; }
.col-card-title { font-weight: 700; letter-spacing: -0.03em; color: var(--pdf-ink); font-size: 1.28rem; }
.col-card-sub { color: #3c3c40; }
.col-card-meta { border-top: 1px solid var(--pdf-line); }
.col-card-cta { color: var(--pdf-ink); font-weight: 600; }
.col-card-link:hover .col-card-cta { color: var(--pdf-red); }
.col-card-placeholder { border-radius: 0; border: 1px dashed var(--pdf-line); background: #fff; }

/* ============ 2026-09-17 구조 개편: 본문 펼침 · 그림 · 글쓴이 · 인쇄본 뷰어 ============ */
.col-content-toggle { display: none !important; }
.col-content-body, .col-content-body.open { max-height: none !important; overflow: visible !important; }
.col-content { margin: 0 auto; }
.col-content-body-inner > h2:first-child { margin-top: 12px; }
.col-content-body-inner a { color: var(--pdf-red); text-decoration: underline; text-underline-offset: 3px; word-break: break-all; }
.col-figure { margin: 30px 0 34px; padding: 0; }
.col-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--pdf-line); background: #fff; }
.col-figure figcaption { margin-top: 10px; font-size: 0.9rem; line-height: 1.65; color: var(--pdf-sub); }
.col-figure figcaption strong { color: var(--pdf-red); font-weight: 700; margin-right: 2px; }
.col-figure-note { display: block; margin-top: 2px; }
.col-after-section { padding-top: 24px; }
.col-author { margin-top: 48px; padding: 22px 0 0; border-top: 2px solid var(--pdf-rule); }
.col-author h2 { border-top: 0 !important; padding-top: 0 !important; margin: 0 0 12px !important; }
.col-author-name { font-size: 1.15rem; font-weight: 700; margin: 0; }
.col-author-name span { font-size: 0.9rem; font-weight: 500; color: var(--pdf-sub); margin-left: 6px; }
.col-author-cred { margin: 6px 0 0; font-size: 0.92rem; font-weight: 600; color: var(--pdf-red); }
.col-author-desc { margin: 10px 0 0; font-size: 0.95rem; line-height: 1.75; color: #3c3c40; }
.col-author-link { display: inline-block; margin-top: 12px; font-size: 0.9rem; font-weight: 600; color: var(--pdf-ink); border-bottom: 1px solid var(--pdf-ink); }
.viewer-heading { max-width: 720px; margin: 0 auto 18px; font-size: clamp(1.2rem, 1.8vw, 1.4rem); font-weight: 700; letter-spacing: -0.03em; padding-top: 20px; border-top: 2px solid var(--pdf-rule); color: var(--pdf-ink); }
.viewer-heading .kicker { display: block; color: var(--pdf-red); font-size: 0.74rem; letter-spacing: 0.14em; font-weight: 700; margin-bottom: 6px; }