/* static/css/sidebar.css — extracted from index.html (FrameFlow prototype) */
  /* Sidebar */
  .sidebar {
    grid-area: sidebar;
    margin: 14px 0 14px 14px;
    padding: 20px 14px;
    display: flex;
    flex-direction: column;
    gap: 26px;
    position: relative;
    z-index: 20;
    transition: padding 0.3s ease, gap 0.3s ease;
    animation: slideInLeft 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 8px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--neon), #22c55e);
    color: #000;
    font-weight: 900;
    font-size: 14px;
    display: grid;
    place-items: center;
    box-shadow: 0 0 24px var(--neon-glow);
  }

  .brand-text strong {
    display: block;
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.02em;
  }

  .brand-text small {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
  }

  .nav-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0 10px;
    margin-bottom: -14px;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
  }

  .nav-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(74,222,128,0.12), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .nav-item:hover {
    background: var(--surface-hover);
    color: var(--text);
    transform: translateX(2px);
  }

  .nav-item:hover::before { opacity: 1; }

  .nav-item.active {
    background: linear-gradient(90deg, rgba(74,222,128,0.14), rgba(74,222,128,0.03));
    border-color: rgba(74,222,128,0.35);
    color: var(--neon-bright);
    box-shadow: 0 0 24px rgba(74,222,128,0.10);
  }
  html[data-theme="light"] .nav-item.active {
    background: rgba(22,163,74,0.10);
    border-color: rgba(22,163,74,0.26);
    color: #15803d;
    box-shadow: none;
  }

  .nav-item svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.8;
    position: relative;
    z-index: 1;
  }

  .nav-item .badge {
    margin-left: auto;
    background: var(--neon-dim);
    color: var(--neon-bright);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 999px;
    border: 1px solid rgba(74,222,128,0.25);
  }

  .sidebar-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .profile-mini {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px;
    border-radius: var(--radius-sm);
  }
  .profile-mini:hover { background: var(--surface-hover); }

  .profile-trigger {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 6px;
    border-radius: 10px;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text);
    text-align: left;
    font-family: inherit;
    position: relative;
  }
  .profile-trigger:hover { background: var(--surface-2); }
  .profile-trigger:active { transform: scale(0.99); }

  .avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 14px;
    border: 2px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
  }
  .profile-mini .avatar,
  .user-menu-header .avatar {
    background: linear-gradient(135deg, #06b6d4, #3b82f6);
    border-color: rgba(6,182,212,0.25);
  }

  .profile-mini div strong { display: block; font-size: 13px; }
  .profile-mini div small { color: var(--text-muted); font-size: 11px; }

  .user-menu-dropdown {
    position: absolute;
    left: 0;
    bottom: calc(100% + 10px);
    width: 280px;
    background: var(--modal-bg);
    border: 1px solid var(--modal-border);
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.35);
    padding: 8px;
    opacity: 0;
    transform: translateY(8px) scale(0.96);
    pointer-events: none;
    transition: opacity .18s ease, transform .18s cubic-bezier(0.16,1,0.3,1);
    z-index: 50;
  }
  .user-menu-dropdown.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }
  html[data-theme="light"] .user-menu-dropdown {
    box-shadow: 0 12px 28px rgba(0,0,0,0.08);
  }

  .user-menu-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 12px;
    border-radius: 12px;
    background: var(--surface);
    margin-bottom: 6px;
  }
  .user-menu-header .avatar {
    width: 52px;
    height: 52px;
    font-size: 18px;
    border: 2px solid var(--border-strong);
  }
  .user-menu-info { min-width: 0; }
  .user-menu-info strong {
    display: block;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
  }
  .user-menu-id, .user-menu-tel {
    font-size: 11px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .user-menu-id { margin-bottom: 2px; }
  .user-menu-copy {
    cursor: pointer;
    padding: 2px;
    border-radius: 4px;
    color: var(--text-muted);
    transition: color .15s ease, background .15s ease;
  }
  .user-menu-copy:hover { color: var(--text); background: var(--surface-hover); }
  .user-menu-badge {
    display: inline-flex;
    margin-top: 6px;
    padding: 3px 8px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.02em;
    background: linear-gradient(135deg, #06b6d4, #3b82f6);
    color: #fff;
  }

  .user-menu-divider {
    height: 1px;
    background: var(--border);
    margin: 6px 4px;
  }

  .user-menu-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    text-align: left;
    transition: background .15s ease;
  }
  .user-menu-item:hover { background: var(--surface-hover); }
  .user-menu-item-left {
    display: flex;
    align-items: center;
    gap: 11px;
    flex-shrink: 0;
    white-space: nowrap;
  }
  .user-menu-item-left svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    flex-shrink: 0;
  }
  .user-menu-item .theme-toggle { flex-shrink: 0; }
  .user-menu-item.logout svg { color: var(--text-muted); }

  .theme-toggle {
    display: inline-flex;
    align-items: center;
    background: var(--surface-2);
    border-radius: 999px;
    padding: 3px;
    gap: 2px;
  }
  .theme-toggle .theme-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
    cursor: pointer;
    font-family: inherit;
    transition: color .15s ease, background .15s ease;
    user-select: none;
  }
  .theme-toggle .theme-btn.active {
    background: rgba(255,255,255,0.14);
    color: #fff;
    box-shadow: inset 0 1px 2px rgba(255,255,255,0.08);
  }
  html[data-theme="light"] .theme-toggle .theme-btn.active {
    background: #fff;
    color: var(--text);
    box-shadow: 0 1px 3px rgba(0,0,0,0.10);
  }

  /* Sidebar collapsed state + hover tooltips */
  /* Labels clip their width (instead of wrapping) so collapsing/expanding never squishes text */
  .nav-item > span:not(.badge),
  .brand-text {
    white-space: nowrap;
    overflow: hidden;
    max-width: 220px;
    transition: opacity 0.18s ease, max-width 0.32s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s ease;
  }
  .app-shell.collapsed .nav-label,
  .app-shell.collapsed .badge,
  .app-shell.collapsed .profile-mini .profile-info { display: none; }

  .app-shell.collapsed .nav-item > span:not(.badge),
  .app-shell.collapsed .brand-text {
    max-width: 0;
    opacity: 0;
    transform: translateX(-6px);
    margin: 0;
    pointer-events: none;
    transition: max-width 0.32s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.12s ease, transform 0.2s ease;
  }

  .app-shell.collapsed .sidebar { align-items: stretch; padding: 20px 8px; gap: 18px; }
  .app-shell.collapsed .brand { justify-content: center; width: 40px; padding: 0; gap: 0; align-self: center; }
  .app-shell.collapsed .nav-label { align-self: center; }
  .app-shell.collapsed .nav-list { align-items: center; }
  .app-shell.collapsed .nav-item { justify-content: center; padding: 10px; width: 40px; gap: 0; overflow: visible; }
  .app-shell.collapsed .nav-item:hover { transform: none; }
  .app-shell.collapsed .sidebar-footer { width: 100%; align-items: center; align-self: center; }
  .app-shell.collapsed .profile-mini {
    justify-content: center;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .app-shell.collapsed .profile-trigger {
    justify-content: center;
    padding: 0;
    background: transparent;
    border-radius: 50%;
  }
  .app-shell.collapsed .user-menu-dropdown { left: 0; width: 280px; }

  .nav-item { position: relative; }
  /* 收起态：把 ::before 从悬停光晕改为 Tooltip 左侧的小三角（指向图标） */
  .app-shell.collapsed .nav-item::before {
    content: '';
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%) translateX(-8px);
    width: 0; height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 6px solid rgba(12,14,12,0.96);
    background: none;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 61;
  }
  .app-shell.collapsed .nav-item:hover::before {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
  .app-shell.collapsed .nav-item::after {
    content: attr(data-tip);
    position: absolute;
    left: calc(100% + 14px);
    top: 50%;
    transform: translateY(-50%) translateX(-8px);
    background: rgba(12,14,12,0.96);
    border: none;
    color: #fff;
    padding: 7px 11px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 60;
    box-shadow: 0 10px 26px rgba(0,0,0,0.55), 0 0 0 1px rgba(74,222,128,0.18);
  }
  .app-shell.collapsed .nav-item:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }


  /* 浅色主题：品牌 Logo 文字改白色，深色主题保持原黑色 */
  html[data-theme="light"] .brand-mark { color: #ffffff; }