/* --- ERP 스타일 심플/모던 사이드바 --- */
body {
  background: #f4f6fa;
  font-family: 'Segoe UI', 'Malgun Gothic', Arial, sans-serif;
  margin: 0;
}

.sidebar {
  width: 220px;
  background: #23304e;
  color: #fff;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  overflow-y: auto;
  box-shadow: 2px 0 8px rgba(30,40,60,0.06);
  z-index: 1000;
  transition: left 0.3s ease;
}
.sidebar.collapsed {
  left: -220px;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 18px;
  border-bottom: 1px solid #2e3a55;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 1px;
  background: #1b253a;
}
.erp-logo {
  color: #38bdf8;
  font-weight: 900;
  font-size: 1.2em;
  margin-left: 4px;
}
a.sidebar-title {
  color: #fff;
  margin-left: 2px;
  white-space: nowrap;
  flex: 1;
  transition: opacity 0.2s;
  text-decoration: none;
  cursor: pointer;
  display: flex;
  align-items: center;
}
a.sidebar-title:hover {
  background: none !important;
  color: #fff !important;
  text-decoration: none !important;
}
a.sidebar-title:active,
a.sidebar-title:focus {
  background: none !important;
  color: #fff !important;
  outline: none !important;
  box-shadow: none !important;
}
.sidebar.collapsed .sidebar-title {
  opacity: 0;
  width: 0;
  overflow: hidden;
}
.sidebar-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.3s;
}
.sidebar-toggle:hover {
  opacity: 0.8;
}
.sidebar.collapsed .sidebar-toggle {
  position: fixed;
  top: 15px;
  left: 15px;
  background: #23304e;
  padding: 10px;
  z-index: 1001;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.sidebar.collapsed .sidebar-toggle:hover {
  background: #2e3a55;
  opacity: 1;
}
.toggle-icon {
  width: 22px;
  height: 2px;
  background: #fff;
  display: block;
  transition: all 0.3s;
  border-radius: 2px;
}
.sidebar-toggle:hover .toggle-icon {
  background: #38bdf8;
}
.sidebar nav {
  margin-top: 8px;
}
.sidebar-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar-menu > li {
  margin: 0;
}
.sidebar a, .sidebar .menu-label {
  display: block;
  color: #e0e7ef;
  text-decoration: none;
  font-size: 1rem;
  padding: 9px 18px 9px 18px;
  transition: background 0.15s, color 0.15s;
  cursor: pointer;
}
.sidebar a:hover, .sidebar .menu-label:hover {
  background: #38bdf8;
  color: #ffffff;
}
.sidebar .has-sub > .menu-label {
  font-weight: 600;
  background: #22304a;
  border-left: 3px solid #38bdf8;
  margin-top: 2px;
}
.sidebar .has-sub > .menu-label:after {
  content: '\25B6';
  float: right;
  font-size: 0.85em;
  margin-left: 8px;
  transition: transform 0.2s;
}
.sidebar .has-sub.open > .menu-label:after {
  transform: rotate(90deg);
}
.sidebar .has-sub > ul {
  display: none;
  background: #27375a;
  margin: 0;
  padding: 0;
}
.sidebar .has-sub.open > ul {
  display: block;
}
.sidebar .has-sub > ul > li > a, .sidebar .has-sub > ul > li > .menu-label {
  font-weight: 400;
  background: #27375a;
  color: #c7d2e5;
  padding-left: 36px;
  border-left: 3px solid transparent;
}
.sidebar .has-sub > ul > li > a:hover, .sidebar .has-sub > ul > li > .menu-label:hover {
  background: #38bdf8;
  color: #ffffff;
  border-left: 3px solid #38bdf8;
}
.sidebar .has-sub > ul > li > ul > li > a {
  background: #334d73;
  color: #c7d2e5;
  padding-left: 54px;
  font-size: 0.97rem;
  border-left: 3px solid transparent;
}
.sidebar .has-sub > ul > li > ul > li > a:hover {
  background: #38bdf8;
  color: #ffffff;
  border-left: 3px solid #38bdf8;
}

/* 현재 페이지 강조 */
.sidebar a.active:not(.sidebar-title) {
  background: #ffffff !important;
  color: #1b253a !important;
  font-weight: 700 !important;
  border-left: 3px solid #38bdf8 !important;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.sidebar .has-sub > ul > li > a.active {
  background: #ffffff !important;
  color: #1b253a !important;
  font-weight: 700 !important;
  border-left: 3px solid #38bdf8 !important;
}

.sidebar .has-sub > ul > li > ul > li > a.active {
  background: #ffffff !important;
  color: #1b253a !important;
  font-weight: 700 !important;
  border-left: 3px solid #38bdf8 !important;
}


/* --- 상단 네비게이션 --- */
.main-header {
  margin-left: 220px;
  height: 54px;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  display: flex;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  transition: margin-left 0.2s;
}
.sidebar-collapsed .main-header {
  margin-left: 56px;
}
.main-nav {
  display: flex;
  gap: 24px;
  margin-left: 24px;
}
.main-link {
  color: #1e293b;
  font-weight: 600;
  text-decoration: none;
  font-size: 1.08rem;
  padding: 6px 10px;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
}
.main-link:hover {
  background: #38bdf8;
  color: #fff;
}

/* 모바일 스타일 */
@media (max-width: 768px) {
  .sidebar {
    left: -220px;
  }

  .sidebar.open {
    left: 0;
  }

  .sidebar-toggle {
    position: fixed;
    top: 15px;
    left: 15px;
    background: #23304e;
    padding: 10px;
    z-index: 1002;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: left 0.3s ease;
  }

  .sidebar.open .sidebar-toggle {
    left: 235px;
  }

  .sidebar.open + .sidebar-overlay {
    display: block;
  }

  .content-wrapper {
    margin-left: 0 !important;
  }
}

/* 사이드바 오버레이 (모바일용) */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
}

@media (max-width: 900px) {
  .sidebar {
    width: 220px;
  }
}

.main-header {
  margin-left: 220px;
}
.sidebar-collapsed .main-header {
  margin-left: 0;
}

.sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid #2e3a55;
}
.sidebar-logout-btn {
  width: 100%;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid #3d4f70;
  border-radius: 6px;
  color: #a0aec0;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
}
.sidebar-logout-btn:hover {
  background: #c0392b;
  border-color: #c0392b;
  color: #fff;
}