/* ========== SIDEBAR ========== */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 280px; background: #dadada; box-shadow: 4px 0 20px rgba(0,0,0,0.05); transition: all 0.3s cubic-bezier(0.4,0,0.2,1); display: flex; flex-direction: column; z-index: 10; border-right: 1px solid rgba(0,0,0,0.05); }
.sidebar.collapsed { width: 80px; }
.sidebar.collapsed .sidebar-logo-img, .sidebar.collapsed .nav-item span { display: none; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 12px 0; }
.sidebar.collapsed .nav-item i { margin: 0; font-size: 1.5rem; width: auto; }
/* Исправление для подменю в свёрнутом состоянии */
.sidebar.collapsed .sub-item { justify-content: center !important; padding: 12px 0 !important; }
.sidebar.collapsed .sub-item i { margin: 0 auto !important; font-size: 1.5rem !important; width: auto !important; }
.sidebar.collapsed .sub-item span { display: none !important; }

.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #e2e8f0;
  overflow: hidden;           /* обрезает всё, что выходит за границы */
}
.toggle-btn { background: none; border: none; font-size: 1.4rem; cursor: pointer; color: #3b82f6; padding: 8px; border-radius: 12px; transition: all 0.2s; }
.toggle-btn:hover { background: #eff6ff; }

/* Логотип-изображение: адаптируется под любой размер */
.sidebar-logo-img {
  max-width: 100%;
  height: auto;
  max-height: 60px;          /* ограничиваем высоту, чтобы не раздувать панель */
  object-fit: contain;
  object-position: left center;
  display: block;
  flex-shrink: 0;
  margin: 0;                 /* без отступов, уже выровнен по левому краю */
}

.sidebar-nav { flex: 1; padding: 24px 12px; display: flex; flex-direction: column; gap: 8px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 14px; text-decoration: none; color: #1e293b; font-weight: 500; transition: all 0.2s; white-space: normal; word-break: break-word; line-height: 1.3; }
.nav-item i { width: 24px; font-size: 1.2rem; flex-shrink: 0; }
.nav-item:hover { background: #e2e8f0; color: #1e40af; }
.nav-item.active { background: linear-gradient(135deg, #3b82f6, #2563eb); color: white; box-shadow: 0 6px 14px rgba(59,130,246,0.25); }

body.dark-theme .sidebar { background: #1e293b; border-right-color: #334155; }
body.dark-theme .sidebar-header { border-bottom-color: #334155; }
body.dark-theme .toggle-btn { color: #60a5fa; }
body.dark-theme .toggle-btn:hover { background: #334155; }
body.dark-theme .nav-item { color: #cbd5e1; }
body.dark-theme .nav-item:hover { background: #334155; color: white; }
body.dark-theme .nav-item.active { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }

.nav-group { margin-bottom: 4px; }
.sub-item { padding-left: 44px !important; font-size: 0.9rem; white-space: normal; word-break: break-word; }
.submenu { overflow: hidden; transition: max-height 0.3s ease-out; max-height: 0; }
.submenu.show { max-height: 300px; }
.nav-group.active > .nav-item { background: linear-gradient(135deg, #3b82f6, #2563eb); color: white; box-shadow: 0 6px 14px rgba(59,130,246,0.25); }
.nav-group.active > .nav-item i, .nav-group.active > .nav-item span { color: white; }
.nav-item.sub-item.active { background: linear-gradient(135deg, #3b82f6, #2563eb); color: white; box-shadow: 0 6px 14px rgba(59,130,246,0.25); }
.nav-item.sub-item.active i, .nav-item.sub-item.active span { color: white; }
.sub-item span { white-space: normal; }