/* =========================================================
   common.css — 청조이엔씨 공통 스타일
   모든 서브 페이지에서 공유
   ========================================================= */

/* ── RESET & BASE ───────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:    #D6000F;
  --primary-dk: #002F72;
  --dark:       #1A1A1A;
  --mid:        #444;
  --muted:      #888;
  --border:     #E0E0E0;
  --bg:         #F5F5F3;
  --white:      #fff;
  --nav-h:      72px;
  --ff:         'Pretendard', sans-serif;
}

body { font-family: var(--ff); color: var(--dark); background: #fff; }
a    { text-decoration: none; color: inherit; }

/* ── PAGE HERO ──────────────────────────────── */
.page-hero {
  background: var(--dark);
  padding: calc(var(--nav-h) + 60px) 0 60px;
  text-align: center;
}
.page-hero-label {
  font-size: 14px; color: rgba(255,255,255,.5);
  letter-spacing: 3px; text-transform: uppercase; margin-bottom: 12px;
}
.page-hero-title { font-size: 32px; font-weight: 700; color: #fff; }
.page-hero-line  { width: 40px; height: 3px; background: var(--primary); margin: 16px auto 0; }

/* ── CONTENT LAYOUT ─────────────────────────── */
.page-wrap {
  max-width: 1200px; margin: 0 auto;
  padding: 80px 40px 100px;
  display: flex; gap: 60px; align-items: flex-start;
}

/* ── SIDE NAV ───────────────────────────────── */
.side-nav { width: 200px; flex-shrink: 0; }
.side-nav-title {
  font-size: 16px; font-weight: 800; color: var(--dark);
  padding-bottom: 14px; margin-bottom: 4px;
  border-bottom: 2px solid var(--dark);
}
/* 계층 메뉴 카테고리 제목 */
.side-nav-cat {
  font-size: 13px; font-weight: 800; letter-spacing: 1px;
  text-transform: uppercase; color: var(--dark);
  padding: 12px 14px 4px;
  margin-top: 4px;
}
.side-nav-cat:first-of-type { margin-top: 2px; }

.side-nav ul { list-style: none; padding: 0; margin: 0; }
.side-nav ul li a {
  display: block; padding: 11px 14px;
  font-size: 14px; color: #555;
  transition: color .2s, background .2s;
}
.side-nav ul li a:hover  { color: var(--primary); background: #fff0f0; }
.side-nav ul li a.active {
  color: var(--primary); font-weight: 700;
  background: #fff0f0; border-left: 3px solid var(--primary);
}

/* ── PAGE CONTENT ───────────────────────────── */
.page-content { flex: 1; min-width: 0; }
.page-content img            { max-width: 100%; height: auto; display: block; }
.page-content img + img      { margin-top: 40px; }

/* ── RESPONSIVE ─────────────────────────────── */
@media (max-width: 768px) {
  .page-wrap  { flex-direction: column; padding: 40px 20px 60px; gap: 32px; }
  .side-nav   { width: 100%; }

  /* 모바일: 카테고리 타이틀만 표시 */
  .side-nav ul { display: none; }
  .side-nav-cat {
    display: block;
    padding: 13px 16px;
    margin-top: 2px;
    border-radius: 6px;
    cursor: pointer;
    transition: color .2s, background .2s;
  }
  .side-nav-cat:hover { color: var(--primary); background: #fff0f0; }
  .side-nav-cat.mob-active { color: var(--primary); background: #fff0f0; border-left: 3px solid var(--primary); }
}