/* ------------------------------------------------------------------
 * rikar-nav — rikar.org 공통 헤더 (아카이브용)
 * 경로 : /opt/atom-b/app/vendor/rikar-nav/styles.css
 * URL  : https://archives.rikar.org/vendor/rikar-nav/styles.css
 *
 * AtoM(Bootstrap 2.3.2)과 Omeka(Bootstrap 3) 양쪽에서 같은 URL로 로드된다.
 * 두 사이트의 기존 레이아웃을 건드리지 않도록 모든 선택자에 rk- 접두사를
 * 붙였고, 전역 리셋(* {} )이나 .container 재정의는 절대 넣지 않는다.
 * ------------------------------------------------------------------ */

.rk-header,
.rk-header * {
  box-sizing: border-box;
}

.rk-header {
  background: #ffffff;
  border-bottom: 1px solid #e6e6e6;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0 0 20px 0;
  position: relative;
  z-index: 1000;
}

.rk-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── 1단: rikar.org 본체 메뉴 ─────────────────────────────── */

.rk-header-main {
  padding: 20px 0;
}

.rk-header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.rk-logo {
  display: inline-block;
  line-height: 0;
}

.rk-logo img {
  height: 40px;
  width: auto;
  max-width: none;
  border: 0;
}

.rk-nav {
  display: flex;
  align-items: center;
  gap: 25px;
}

.rk-nav-item {
  position: relative;
}

.rk-nav-link {
  display: inline-block;
  color: rgba(0, 0, 0, 0.5);
  font-size: 20px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s ease;
}

.rk-nav-link:hover,
.rk-nav-link:focus {
  color: rgba(0, 0, 0, 0.7);
  text-decoration: none;
}

/* 현재 보고 있는 곳(아카이브) 표시 */
.rk-nav-link.rk-current {
  color: rgba(0, 0, 0, 0.85);
  font-weight: 600;
}

.rk-caret {
  font-size: 14px;
  margin-left: 4px;
}

/* 드롭다운 */
.rk-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 12px;
  min-width: 180px;
  padding: 8px 0;
  background: #ffffff;
  border: 1px solid #e6e6e6;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 1001;
}

/* 메뉴와 드롭다운 사이 마우스가 지나갈 여백 확보 */
.rk-dropdown::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

.rk-nav-item:hover .rk-dropdown,
.rk-nav-item:focus-within .rk-dropdown {
  display: block;
}

.rk-dropdown a {
  display: block;
  padding: 10px 20px;
  color: rgba(0, 0, 0, 0.6);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease;
}

.rk-dropdown a:hover,
.rk-dropdown a:focus {
  background: #f5f5f5;
  color: rgba(0, 0, 0, 0.85);
  text-decoration: none;
}

/* ── 2단: 아카이브 내부 탐색 서브바 ───────────────────────── */

.rk-subnav {
  border-top: 1px solid #f0f0f0;
  background: #fafafa;
  padding: 12px 0;
}

.rk-subnav-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.rk-subnav-group {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.rk-subnav-label {
  color: rgba(0, 0, 0, 0.75);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.rk-subnav-group a {
  color: rgba(0, 0, 0, 0.5);
  font-size: 15px;
  font-weight: 400;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.rk-subnav-group a:hover,
.rk-subnav-group a:focus {
  color: rgba(0, 0, 0, 0.8);
  text-decoration: none;
}

.rk-subnav-sep {
  color: #dddddd;
  user-select: none;
}

.rk-subnav-spacer {
  flex: 1 1 auto;
}

.rk-subnav-search {
  color: rgba(0, 0, 0, 0.5);
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
}

.rk-subnav-search:hover,
.rk-subnav-search:focus {
  color: rgba(0, 0, 0, 0.8);
  text-decoration: none;
}

/* ── 모바일 ───────────────────────────────────────────────── */

@media (max-width: 768px) {
  .rk-header-content {
    flex-direction: column;
    gap: 16px;
  }

  .rk-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 18px;
  }

  .rk-nav-link {
    font-size: 17px;
  }

  /* 모바일엔 hover가 없으므로 드롭다운을 항상 펼쳐 둔다 */
  .rk-dropdown {
    display: block;
    position: static;
    margin-top: 0;
    min-width: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .rk-dropdown::before {
    display: none;
  }

  .rk-nav-item .rk-dropdown a {
    display: inline-block;
    padding: 2px 8px;
    font-size: 15px;
  }

  .rk-nav-item .rk-dropdown a:hover {
    background: transparent;
  }

  .rk-subnav-inner {
    justify-content: center;
  }

  .rk-subnav-spacer {
    display: none;
  }
}