:root {
  --tn-sidebar-bg: #0f172a;
  --tn-sidebar-border: rgba(255, 255, 255, 0.06);
  --tn-sidebar-text: #cbd5f5;
  --tn-sidebar-muted: #94a3b8;
  --tn-sidebar-hover: rgba(255, 255, 255, 0.04);
  --tn-sidebar-active: linear-gradient(90deg, #2563eb, #1d4ed8);
  --tn-sidebar-active-text: #ffffff;
  --tn-sidebar-section: #64748b;
}

.tn-sidebar {
  width: 260px;
  min-width: 260px;
  max-width: 260px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--tn-sidebar-bg);
  border-right: 1px solid var(--tn-sidebar-border);
  color: var(--tn-sidebar-text);
  font-family: system-ui, -apple-system, sans-serif;
  overflow: hidden;
}

.tn-sidebar * { box-sizing: border-box; }

.tn-sidebar.collapsed,
.tn-sidebar.is-collapsed {
  width: 72px;
  min-width: 72px;
  max-width: 72px;
}

.tn-sidebar-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--tn-sidebar-border);
}

.tn-header-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tn-collapse-btn,
.tn-favs-toggle,
.tn-sidebar-toggle {
  min-width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: var(--tn-sidebar-text);
  cursor: pointer;
}

.tn-collapse-btn:hover,
.tn-favs-toggle:hover,
.tn-sidebar-toggle:hover {
  background: var(--tn-sidebar-hover);
  color: #fff;
}

.tn-header-titles { min-width: 0; flex: 1; }
.tn-title {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tn-subtitle {
  margin-top: 2px;
  color: var(--tn-sidebar-muted);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tn-mode-label {
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border: 1px solid rgba(37, 99, 235, 0.55);
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 700;
  color: #e2e8f0;
  background: rgba(37, 99, 235, 0.2);
}

.tn-sidebar-search {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.tn-search {
  width: 100%;
  border-radius: 8px;
  border: none;
  background: #020617;
  color: #fff;
  font-size: 13px;
  padding: 8px 10px;
}

.tn-search-clear {
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: var(--tn-sidebar-muted);
  font-size: 12px;
  padding: 7px 10px;
  cursor: pointer;
}

.tn-search-clear:hover {
  color: #fff;
  background: var(--tn-sidebar-hover);
}

.tn-sidebar.collapsed .tn-header-titles,
.tn-sidebar.is-collapsed .tn-header-titles,
.tn-sidebar.collapsed .tn-sidebar-search,
.tn-sidebar.is-collapsed .tn-sidebar-search {
  display: none;
}

.tn-sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 10px 10px 14px;
}

.tn-sidebar-search-empty {
  margin: 10px 6px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 12px;
  color: var(--tn-sidebar-muted);
  background: rgba(255, 255, 255, 0.03);
}

.tn-favourites-root { margin-bottom: 12px; }
.tn-favourites-section {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: rgba(2, 6, 23, 0.44);
  padding: 8px;
}

.tn-favourites-header {
  width: 100%;
  padding: 4px 4px 2px;
  background: transparent;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: inherit;
  cursor: pointer;
}

.tn-favourites-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #93c5fd;
  font-weight: 800;
}

.tn-group {
  margin-top: 8px;
}

.tn-sidebar-section {
  margin: 12px 8px 6px;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--tn-sidebar-section);
  letter-spacing: 0.08em;
  font-weight: 700;
}

.tn-group-btn {
  width: 100%;
  margin: 0 4px;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--tn-sidebar-text);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.tn-group-btn:hover {
  background: var(--tn-sidebar-hover);
}

.tn-group[data-tn-active="1"] .tn-group-btn {
  border-color: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.tn-group-icon {
  width: 18px;
  text-align: center;
  opacity: 0.85;
}

.tn-group-label {
  flex: 1;
  text-align: left;
  font-size: 13px;
  font-weight: 650;
}

.tn-group-panel {
  display: none;
  padding: 5px 0 0 4px;
}

.tn-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.tn-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 4px;
}

.tn-sidebar-item,
.tn-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
  padding: 9px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--tn-sidebar-text);
  font-size: 13px;
  transition: all 0.15s ease;
}

.tn-sidebar-icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  opacity: 0.9;
  flex: 0 0 18px;
}

.tn-sidebar-label,
.tn-nav-text {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tn-sidebar-item:hover,
.tn-nav-link:hover {
  background: var(--tn-sidebar-hover);
  color: #fff;
}

.tn-sidebar-item.active,
.tn-nav-link.is-active {
  background: var(--tn-sidebar-active);
  color: var(--tn-sidebar-active-text);
  font-weight: 600;
}

.tn-fav-btn {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: var(--tn-sidebar-muted);
  cursor: pointer;
}

.tn-fav-btn:hover,
.tn-fav-btn.is-fav {
  color: #fff;
  background: var(--tn-sidebar-hover);
}

.tn-sidebar.collapsed .tn-sidebar-label,
.tn-sidebar.is-collapsed .tn-sidebar-label,
.tn-sidebar.collapsed .tn-nav-text,
.tn-sidebar.is-collapsed .tn-nav-text,
.tn-sidebar.collapsed .tn-fav-btn,
.tn-sidebar.is-collapsed .tn-fav-btn,
.tn-sidebar.collapsed .tn-group-label,
.tn-sidebar.is-collapsed .tn-group-label,
.tn-sidebar.collapsed .tn-group-chevron,
.tn-sidebar.is-collapsed .tn-group-chevron,
.tn-sidebar.collapsed .tn-sidebar-section,
.tn-sidebar.is-collapsed .tn-sidebar-section,
.tn-sidebar.collapsed .tn-favourites-root,
.tn-sidebar.is-collapsed .tn-favourites-root {
  display: none !important;
}

.tn-sidebar.collapsed .tn-sidebar-nav,
.tn-sidebar.is-collapsed .tn-sidebar-nav {
  padding: 10px 8px 14px;
}

.tn-sidebar.collapsed .tn-nav-item,
.tn-sidebar.is-collapsed .tn-nav-item {
  justify-content: center;
}

.tn-sidebar.collapsed .tn-sidebar-item,
.tn-sidebar.is-collapsed .tn-sidebar-item,
.tn-sidebar.collapsed .tn-nav-link,
.tn-sidebar.is-collapsed .tn-nav-link,
.tn-sidebar.collapsed .tn-group-btn,
.tn-sidebar.is-collapsed .tn-group-btn {
  justify-content: center;
  padding-left: 0;
  padding-right: 0;
}

.tn-sidebar-footer {
  margin-top: auto;
  padding: 12px;
  border-top: 1px solid var(--tn-sidebar-border);
}

.tn-sidebar-footer__row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tn-sidebar-footer__logout {
  margin-left: auto;
}