:root {
  --sb2-width: 244px;
  --sb2-width-mini: 70px;
  --sb2-bg: var(--bg-1, #0d1117);
  --sb2-surface: var(--bg-2, #161b22);
  --sb2-border: var(--border-muted, #21262d);
  --sb2-hover: var(--bg-hover, rgba(177, 186, 196, 0.08));
  --sb2-text: var(--fg-2, #c9d1d9);
  --sb2-muted: var(--fg-3, #8b949e);
  --sb2-strong: var(--fg-1, #f0f6fc);
  --sb2-accent: var(--info, #58a6ff);
  --sb2-active-bg: var(--info-soft, rgba(56, 139, 253, 0.15));
  --sb2-danger: #f85149;
  --sb2-danger-bg: rgba(248, 81, 73, 0.12);
  --sb2-radius: 8px;
  --sb2-ease: 0.15s ease;
  --sb2-shadow: 0 12px 32px rgba(1, 4, 9, 0.6);
}

/* ---------- Layout: no top navbar ---------- */
.main-panel {
  padding-top: 0 !important;
  min-height: 100vh !important;
}

/* ---------- Shell ---------- */
.sidebar.sb2 {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1030;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  width: var(--sb2-width);
  height: 100vh;
  min-height: 100vh;
  background: var(--sb2-bg) !important;
  border-right: 1px solid var(--sb2-border);
  transition: width 0.2s ease;
}

@media (min-width: 992px) {
  .sb2 ~ .page-body-wrapper {
    margin-left: var(--sb2-width);
    width: calc(100% - var(--sb2-width)) !important;
    transition: margin-left 0.2s ease, width 0.2s ease;
  }

  .sidebar-icon-only .sb2 ~ .page-body-wrapper {
    margin-left: var(--sb2-width-mini);
    width: calc(100% - var(--sb2-width-mini)) !important;
  }
}

/* ---------- Header ---------- */
.sb2-header {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 72px;
  padding: 16px 12px 16px 16px;
  border-bottom: 1px solid var(--sb2-border);
  flex-shrink: 0;
}

.sb2-logo {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.sb2-logo img {
  display: block;
  max-width: 100%;
  max-height: 40px;
  object-fit: contain;
  transition: max-height var(--sb2-ease);
}

.sb2-icon-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--sb2-border);
  border-radius: var(--sb2-radius);
  background: transparent;
  color: var(--sb2-muted);
  cursor: pointer;
  transition: background var(--sb2-ease), color var(--sb2-ease), border-color var(--sb2-ease);
}

.sb2-icon-btn:hover {
  background: var(--sb2-hover);
  color: var(--sb2-strong);
  border-color: var(--sb2-muted);
}

.sb2-icon-btn:focus-visible,
.sb2-user:focus-visible,
.sb2-fab:focus-visible {
  outline: 2px solid var(--sb2-accent);
  outline-offset: 2px;
}

.sb2-icon-btn i {
  font-size: 18px;
  line-height: 1;
  transition: transform 0.2s ease;
}

/* ---------- Body / menu ---------- */
.sb2-body {
  flex: 1;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 8px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--sb2-border) transparent;
}

.sb2-body::-webkit-scrollbar {
  width: 4px;
}

.sb2-body::-webkit-scrollbar-thumb {
  background: var(--sb2-border);
  border-radius: 4px;
}

.sidebar.sb2 .nav {
  padding-top: 0 !important;
  margin-bottom: 0 !important;
}

.sidebar.sb2 .nav:not(.sub-menu) > .nav-item {
  padding: 0 8px;
  margin-bottom: 2px;
}

.sidebar.sb2 .nav .nav-item .nav-link {
  position: relative;
  height: 40px;
  padding: 0 8px;
  border-radius: var(--sb2-radius);
  color: var(--sb2-text) !important;
  transition: background var(--sb2-ease), color var(--sb2-ease);
}

.sidebar.sb2 .nav .nav-item .nav-link .menu-title {
  font-size: 14px;
  color: inherit !important;
}

.sidebar.sb2 .nav .nav-item .menu-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  margin-right: 10px;
  border-radius: 6px;
  background: var(--sb2-hover);
  transition: background var(--sb2-ease);
}

.sidebar.sb2 .nav .nav-item .nav-link i.menu-arrow {
  color: var(--sb2-muted);
  transition: transform 0.2s ease;
}

.sidebar.sb2 .nav .nav-item .nav-link[aria-expanded="true"] i.menu-arrow {
  transform: rotate(180deg);
}

.sidebar.sb2 .nav:not(.sub-menu) > .nav-item:hover:not(.nav-category) > .nav-link {
  background: var(--sb2-hover);
  color: var(--sb2-strong) !important;
}

.sidebar.sb2 .nav .nav-item.active > .nav-link {
  background: var(--sb2-active-bg);
}

.sidebar.sb2 .nav .nav-item.active > .nav-link:before {
  top: 10px;
  left: 0;
  width: 3px;
  height: 20px;
  border-radius: 0 3px 3px 0;
  background: var(--sb2-accent);
}

.sidebar.sb2 .nav .nav-item.active > .nav-link .menu-title {
  color: var(--sb2-strong) !important;
  font-weight: 600;
}

.sidebar.sb2 .nav .nav-item.active > .nav-link .menu-icon {
  background: rgba(56, 139, 253, 0.2);
}

/* group label */
.sidebar.sb2 .nav .nav-item.nav-category {
  padding: 12px 16px 4px;
}

.sidebar.sb2 .nav .nav-item.nav-category .nav-link {
  height: auto;
  padding: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--sb2-muted) !important;
}

.sidebar.sb2 .nav:not(.sub-menu) > .nav-item.nav-category:hover > .nav-link {
  background: transparent;
}

/* sub menu */
.sidebar.sb2 .nav.sub-menu {
  position: relative;
  padding: 4px 0 4px 44px;
}

.sidebar.sb2 .nav.sub-menu:before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 30px;
  border-left: 1px solid var(--sb2-border);
}

.sidebar.sb2 .nav.sub-menu .nav-item .nav-link {
  height: auto;
  margin-bottom: 1px;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.3;
  white-space: normal;
  color: var(--sb2-muted) !important;
}

.sidebar.sb2 .nav.sub-menu .nav-item .nav-link:hover {
  background: var(--sb2-hover);
  color: var(--sb2-strong) !important;
}

.sidebar.sb2 .nav.sub-menu .nav-item .nav-link.active {
  background: var(--sb2-active-bg);
  color: var(--sb2-accent) !important;
  font-weight: 600;
}

.sidebar.sb2 .nav.sub-menu .nav-category-sub {
  padding: 10px 10px 4px !important;
  font-size: 11px !important;
  color: var(--sb2-muted) !important;
  opacity: 0.8;
}

/* ---------- Footer / user ---------- */
.sb2-footer {
  position: relative;
  flex-shrink: 0;
  padding: 8px;
  border-top: 1px solid var(--sb2-border);
}

.sb2-user {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px;
  border: 0;
  border-radius: var(--sb2-radius);
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--sb2-ease);
}

.sb2-user:hover,
.sb2-user[aria-expanded="true"] {
  background: var(--sb2-hover);
}

.sb2-avatar {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--sb2-radius);
  background: linear-gradient(135deg, #1f6feb, #8957e5);
  color: #ffffff !important;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.sb2-user-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.sb2-user-name,
.sb2-user-role {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.sb2-user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--sb2-strong) !important;
}

.sb2-user-role {
  font-size: 12px;
  color: var(--sb2-muted) !important;
}

.sb2-user-caret {
  font-size: 18px;
  color: var(--sb2-muted);
}

/* popup */
.sb2-menu {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: calc(100% + 4px);
  z-index: 1050;
  padding: 4px;
  border: 1px solid var(--sb2-border);
  border-radius: var(--sb2-radius);
  background: var(--sb2-surface) !important;
  box-shadow: var(--sb2-shadow);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(6px) scale(0.98);
  transform-origin: bottom center;
  transition: opacity var(--sb2-ease), transform var(--sb2-ease), visibility 0s linear 0.15s;
}

.sb2-menu.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
  transition: opacity var(--sb2-ease), transform var(--sb2-ease);
}

.sb2-menu-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
}

.sb2-menu-sep {
  height: 1px;
  margin: 4px -4px;
  background: var(--sb2-border) !important;
}

.sb2-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--sb2-text) !important;
  text-decoration: none !important;
  transition: background var(--sb2-ease), color var(--sb2-ease);
}

.sb2-menu-item i {
  font-size: 18px;
  line-height: 1;
}

.sb2-menu-item span {
  color: inherit !important;
}

.sb2-menu-item.is-danger {
  color: var(--sb2-danger) !important;
}

.sb2-menu-item.is-danger:hover {
  background: var(--sb2-danger-bg);
  color: var(--sb2-danger) !important;
}

/* ---------- Mobile toggle + backdrop ---------- */
.sb2-fab {
  display: none;
}

.sb2-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1055;
  background: rgba(1, 4, 9, 0.6);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0s linear 0.2s;
}

body.sb2-drawer-open {
  overflow: hidden;
}

body.sb2-drawer-open .sb2-backdrop {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease;
}

/* ---------- Collapsed (icon only) ---------- */
@media (min-width: 992px) {
  .sidebar-icon-only .sidebar.sb2 {
    width: var(--sb2-width-mini);
  }

  .sidebar-icon-only .sb2-header {
    flex-direction: column;
    gap: 8px;
    padding: 12px 8px;
  }

  .sidebar-icon-only .sb2-logo img {
    max-height: 24px;
  }

  .sidebar-icon-only .sb2-icon-btn i {
    transform: rotate(180deg);
  }

  .sidebar-icon-only .sb2-body {
    overflow: visible;
  }

  .sidebar-icon-only .sidebar.sb2 .nav:not(.sub-menu) > .nav-item {
    padding: 0;
  }

  .sidebar-icon-only .sidebar.sb2 .nav .nav-item .nav-link {
    justify-content: center;
    margin: 0 8px;
    padding: 0;
  }

  .sidebar-icon-only .sidebar.sb2 .nav .nav-item .menu-icon {
    margin-right: 0;
  }

  .sidebar-icon-only .sidebar.sb2 .nav .nav-item.hover-open .nav-link .menu-title,
  .sidebar-icon-only .sidebar.sb2 .nav .nav-item.hover-open .collapse,
  .sidebar-icon-only .sidebar.sb2 .nav .nav-item.hover-open .collapsing {
    background: var(--sb2-surface) !important;
  }

  .sidebar-icon-only .sidebar.sb2 .nav .nav-item.hover-open .nav-link .menu-title {
    border-radius: 0 var(--sb2-radius) 0 0;
  }

  .sidebar-icon-only .sidebar.sb2 .nav .nav-item.hover-open .collapse {
    border-radius: 0 0 var(--sb2-radius) 0;
    box-shadow: var(--sb2-shadow);
  }

  .sidebar-icon-only .sidebar.sb2 .nav.sub-menu:before {
    display: none;
  }

  .sidebar-icon-only .sb2-user {
    justify-content: center;
    padding: 4px;
  }

  .sidebar-icon-only .sb2-user-text,
  .sidebar-icon-only .sb2-user-caret {
    display: none;
  }

  .sidebar-icon-only .sb2-menu {
    left: calc(100% + 8px);
    right: auto;
    bottom: 8px;
    width: 220px;
    transform-origin: bottom left;
  }

  .sidebar-icon-only .sb2-menu .sb2-user-text {
    display: flex;
  }
}

/* ---------- Mobile drawer ---------- */
@media (max-width: 991px) {
  .sidebar.sb2.sidebar-offcanvas {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: auto;
    z-index: 1060;
    width: 272px;
    height: 100vh;
    max-height: none;
    overflow: hidden;
    transform: translateX(-100%);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  .sidebar.sb2.sidebar-offcanvas.active {
    transform: translateX(0);
    box-shadow: 16px 0 48px rgba(1, 4, 9, 0.6);
  }

  .sb2-fab {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1040;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--sb2-border);
    border-radius: 10px;
    background: rgba(22, 27, 34, 0.85);
    backdrop-filter: blur(8px);
    color: var(--sb2-strong);
    box-shadow: 0 4px 16px rgba(1, 4, 9, 0.5);
    cursor: pointer;
    transition: background var(--sb2-ease), transform var(--sb2-ease);
  }

  .sb2-fab:hover {
    background: var(--sb2-surface);
  }

  .sb2-fab:active {
    transform: scale(0.95);
  }

  .sb2-fab i {
    font-size: 22px;
    line-height: 1;
  }

  .content-wrapper {
    padding-top: 72px !important;
  }
}