/* ========================================================
   LNB (Left Navigation Bar) - Enterprise High-Density Spec
   폭 240px 고정, 64px 아이콘 축소 토글, 4px 라운드, Lucide 아이콘
   ======================================================== */

.snb-area {
  width: var(--lnb-width);
  min-width: var(--lnb-width);
  height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  user-select: none;
  z-index: 50;
  transition: width 0.2s cubic-bezier(0.4, 0, 0.2, 1), min-width 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: sticky;
  top: 0;
}

/* 64px 축소 상태 (Collapsed Mode - 데스크탑 전용) */
@media (min-width: 1025px) {
  .snb-area.collapsed {
    width: var(--lnb-collapsed-width);
    min-width: var(--lnb-collapsed-width);
  }

  .snb-area.collapsed .snb-logo-text,
  .snb-area.collapsed .snb-tit span,
  .snb-area.collapsed .snb-tit::after,
  .snb-area.collapsed .lnb,
  .snb-area.collapsed .lnb_3dept {
    display: none !important;
  }

  .snb-area.collapsed .snb-tit {
    justify-content: center;
    padding: 8px 0;
  }

  .snb-area.collapsed .snb-tit i,
  .snb-area.collapsed .snb-tit svg {
    margin: 0 !important;
  }
}

/* 스크롤바 미니멀 규격 */
.snb-area::-webkit-scrollbar {
  width: 4px;
}
.snb-area::-webkit-scrollbar-track {
  background: transparent;
}
.snb-area::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 2px;
}

/* LNB 헤더 및 토글 버튼 (48px) */
.snb-header {
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  height: 48px;
  min-height: 48px;
}

.snb-logo-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  overflow: hidden;
}

.snb-logo-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-ctrl);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.snb-logo-icon svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}

.snb-logo-text {
  display: flex;
  flex-direction: column;
}

.snb-logo-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  line-height: 1.2;
}

.snb-logo-badge {
  font-size: 10px;
  color: var(--primary);
  font-weight: 600;
}

/* 접기/펼치기 토글 버튼 */
.snb-collapse-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-ctrl);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.snb-collapse-btn:hover {
  background: var(--bg-page);
  color: var(--text-primary);
}

.snb-collapse-btn svg {
  width: 14px;
  height: 14px;
}

/* 메뉴 리스트 (고밀도) */
.snb-list {
  list-style: none;
  margin: 0;
  padding: 8px 8px 24px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* 1depth: 대메뉴 */
.snb-menu {
  display: flex;
  flex-direction: column;
}

.snb-tit {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-ctrl);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  height: 32px;
}

.snb-tit svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  stroke-width: 1.5;
  flex-shrink: 0;
}

/* 아코디언 캐럿 */
.snb-tit.t1::after {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-right: 1.5px solid var(--text-secondary);
  border-bottom: 1.5px solid var(--text-secondary);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  margin-left: auto;
}

.snb-menu.active > .snb-tit.t1::after,
.snb-menu.open > .snb-tit.t1::after {
  transform: rotate(-135deg);
}

.snb-tit:hover {
  background: var(--bg-page);
  color: var(--text-primary);
}

.snb-tit:hover svg {
  color: var(--primary);
}

.snb-menu.active > .snb-tit,
.snb-tit.on {
  color: var(--primary);
  background: var(--status-info-bg);
  font-weight: 600;
}

.snb-menu.active > .snb-tit svg,
.snb-tit.on svg {
  color: var(--primary);
}

/* 2depth: lnb */
.lnb {
  list-style: none;
  margin: 2px 0 2px 8px;
  padding: 0;
  display: none;
  flex-direction: column;
  gap: 1px;
}

.snb-menu.active > .lnb,
.snb-menu.open > .lnb {
  display: flex;
}

.lnb-tit {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--text-secondary);
  border-radius: var(--radius-ctrl);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  height: 28px;
}

.lnb-tit:hover {
  color: var(--text-primary);
  background: var(--bg-page);
}

.lnb-tit.on {
  color: var(--primary);
  font-weight: 600;
  background: var(--status-info-bg);
}

/* 3depth */
.lnb_3dept {
  list-style: none;
  margin: 1px 0 2px 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.lnb3-menu a {
  display: block;
  padding: 5px 8px;
  font-size: 12px;
  color: var(--text-secondary);
  border-radius: var(--radius-ctrl);
  text-decoration: none;
  transition: all 0.15s ease;
}

.lnb3-menu a:hover {
  color: var(--text-primary);
  background: var(--bg-page);
}

.lnb3-menu a.on {
  color: var(--primary);
  background: var(--status-info-bg);
  font-weight: 600;
}


/* 반응형 SNB 보강 (모바일 & 태블릿 접이식 드로어) */
@media (max-width: 1024px) {
  .snb-area {
    width: 100% !important;
    min-width: 100% !important;
    height: auto !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 300 !important;
    border-right: none;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.06);
  }
  .snb-header {
    height: 50px;
    min-height: 50px;
    padding: 0 14px;
    border-bottom: none;
    background: var(--bg-surface);
  }
  .snb-collapse-btn {
    width: 34px;
    height: 34px;
    background: var(--bg-page);
    border-color: #cbd5e1;
    color: var(--text-primary);
  }
  .snb-collapse-btn svg {
    width: 18px;
    height: 18px;
  }
  /* 모바일에서는 기본으로 메뉴 트리를 접어두고 토글 시에만 오픈 */
  .snb-list {
    display: none !important;
    padding: 8px 12px 18px;
    border-top: 1px solid var(--border);
    background: var(--bg-surface);
    max-height: calc(100vh - 50px);
    overflow-y: auto;
    box-shadow: 0 12px 24px -4px rgba(15, 23, 42, 0.16);
  }
  .snb-area.mobile-open .snb-list {
    display: flex !important;
  }
  .snb-tit {
    height: 38px;
    font-size: 13.5px;
    padding: 8px 12px;
  }
  .lnb-tit {
    height: 34px;
    font-size: 13px;
    padding: 6px 12px;
  }
  .lnb3-menu a {
    padding: 7px 10px;
    font-size: 12.5px;
  }
}