/* ─────────────────────────────────────────────────────────────
   안전이지 공개 페이지 공용 헤더 — 단일 출처
   대상: landing · greeting · chem-search · accident-news ·
         law-amendment · qna · precedent · intro
   규칙: 헤더 모양 수정은 이 파일에서만 한다.
         각 페이지 <style>에 header/.nav/.logo/.nav-right/.nav-menu/
         .btn-login/.nav-toggle/.mobile-menu 규칙을 다시 넣지 말 것
         (페이지별 복사가 갈라져 이 파일로 통일함, 2026-07).
   ───────────────────────────────────────────────────────────── */

header {
  position: sticky; top: 0; z-index: 100;
  background: var(--panel, #f3f1ea);
  border-bottom: 1px solid var(--line, rgba(28,27,23,.16));
  box-shadow: none; backdrop-filter: none;
}
header .wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }

.logo {
  font-size: 18px; font-weight: 800; color: var(--ink, #1c1b17);
  display: flex; align-items: center; gap: 9px;
  letter-spacing: -.3px; white-space: nowrap; text-decoration: none;
}
.logo img { height: 32px; width: 32px; border-radius: 50%; }
.logo span.sub {
  font-family: var(--mono, ui-monospace, monospace); font-weight: 400; font-size: 11px;
  color: var(--ink-3, #8a867c); margin-left: 4px; padding-left: 12px;
  border-left: 1px solid var(--line, rgba(28,27,23,.16)); letter-spacing: .02em;
}

.nav-right { display: flex; align-items: center; gap: 22px; }
.nav-menu {
  font-size: 13.5px; font-weight: 500; color: var(--ink-2, #55524a);
  border-bottom: 2px solid transparent; padding: 4px 0;
  transition: color .2s; text-decoration: none;
}
.nav-menu:hover { color: var(--ink, #1c1b17); }
.nav-menu.active { color: var(--ink, #1c1b17); font-weight: 700; border-bottom-color: var(--ink, #1c1b17); }

.btn-login {
  background: var(--ink, #1c1b17); color: var(--paper, #edeae1);
  padding: 9px 22px; font-family: var(--mono, ui-monospace, monospace);
  font-size: 12.5px; font-weight: 600;
  border: 1px solid var(--ink, #1c1b17); border-radius: 0;
  white-space: nowrap; transition: background .2s;
  box-shadow: none; text-decoration: none;
}
.btn-login:hover { background: #000; box-shadow: none; }

/* 모바일 햄버거 */
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 42px; height: 42px; flex-direction: column;
  justify-content: center; align-items: center; gap: 5px; padding: 0;
  flex-shrink: 0; border-radius: 0;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: var(--ink, #1c1b17);
  border-radius: 0; transition: transform .3s ease, opacity .2s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0; z-index: 99;
  background: var(--panel, #f3f1ea);
  border-bottom: 1px solid var(--line, rgba(28,27,23,.16));
  flex-direction: column; padding: 8px 24px 18px;
  transform: translateY(-14px); opacity: 0; pointer-events: none;
  transition: opacity .26s ease, transform .26s ease;
  border-radius: 0; box-shadow: none;
}
.mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu a {
  padding: 14px 4px; font-size: 15px; font-weight: 600;
  color: var(--ink-2, #55524a);
  border-bottom: 1px solid var(--line-soft, rgba(28,27,23,.08));
  text-decoration: none;
}
.mobile-menu a.active { color: var(--ink, #1c1b17); }
.mobile-menu a.btn-login-m {
  margin-top: 16px; background: var(--ink, #1c1b17); color: var(--paper, #edeae1);
  text-align: center; padding: 14px;
  font-family: var(--mono, ui-monospace, monospace); font-weight: 600;
  border-bottom: none; border-radius: 0;
}

@media (max-width: 980px) {
  .nav-right .nav-menu, .nav-right .btn-login { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: flex; }
}
@media (max-width: 1200px) { .logo span.sub { display: none; } }