/* 侧边栏 */
#sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width var(--transition-normal);
  overflow: hidden;
}

.sidebar-header {
  padding: var(--space-lg) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  border-bottom: 1px solid var(--border-secondary);
  height: var(--header-height);
}

.sidebar-logo {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.sidebar-logo svg {
  width: 100%;
  height: 100%;
  fill: white;
}

.sidebar-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

/* === Instance Switcher === */
.instance-switcher {
  padding: var(--space-xs) var(--space-sm);
  border-bottom: 1px solid var(--border-secondary);
  position: relative;
}
.instance-current {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: border-color 0.15s;
}
.instance-current:hover {
  border-color: var(--accent);
}
.instance-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.instance-dot.local { background: var(--accent); }
.instance-dot.remote { background: #f59e0b; }
.instance-dot.online { background: var(--success, #22c55e); }
.instance-dot.offline { background: var(--error, #ef4444); }
.instance-label {
  flex: 1;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.instance-chevron {
  flex-shrink: 0;
  opacity: 0.5;
}
.instance-dropdown {
  display: none;
  position: absolute;
  left: var(--space-sm);
  right: var(--space-sm);
  top: 100%;
  z-index: 100;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  padding: var(--space-xs) 0;
  max-height: 260px;
  overflow-y: auto;
}
.instance-dropdown.open { display: block; }
.instance-option {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.1s;
}
.instance-option:hover { background: var(--bg-tertiary); }
.instance-option.active {
  color: var(--accent);
  font-weight: 600;
}
.instance-option.instance-add {
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
}
.instance-opt-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.instance-badge {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  flex-shrink: 0;
}
.instance-divider {
  height: 1px;
  background: var(--border-secondary);
  margin: var(--space-xs) 0;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-sm) var(--space-sm);
  overflow-y: auto;
}

.sidebar-footer {
  padding: var(--space-sm);
  border-top: 1px solid var(--border-secondary);
}

.sidebar-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px 2px;
  font-size: 11px;
}
.sidebar-link {
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.2s;
}
.sidebar-link:hover {
  color: var(--primary);
}
.sidebar-version {
  color: var(--text-tertiary);
  opacity: 0.7;
}

.nav-section {
  margin-bottom: var(--space-md);
}

.nav-section-title {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--space-sm) var(--space-sm);
  margin-bottom: var(--space-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.nav-item:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-muted);
  color: var(--accent-hover);
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item.active svg {
  opacity: 1;
}

/* 主内容列（横幅 + 内容区） */
#main-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* 主内容区 */
#content {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-primary);
}

.page {
  padding: var(--space-xl) var(--space-2xl);
  max-width: 1200px;
  animation: pageIn 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.page-header {
  margin-bottom: var(--space-xl);
}

.page-header:has(.page-actions) {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.page-desc {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pageOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

.page-exit {
  animation: pageOut 100ms ease forwards;
  pointer-events: none;
}

/* Setup 页面版本选择卡片 */
.setup-source-option {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.setup-source-option:hover {
  border-color: var(--accent);
  background: var(--bg-glass-hover);
}

.setup-source-option:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-muted);
}

/* 版本更新通知横幅 */
.update-banner {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  z-index: 100;
  transition: all 300ms ease;
  overflow: hidden;
  max-height: 60px;
}
.update-banner-hidden {
  max-height: 0;
  padding: 0 20px;
  opacity: 0;
}
.update-banner-content {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.update-banner-text {
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.update-banner-ver {
  font-weight: 700;
  font-size: var(--font-size-sm);
}
.update-banner-changelog {
  font-size: var(--font-size-xs);
  opacity: 0.85;
}
.update-banner .btn {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  font-weight: 600;
  backdrop-filter: blur(4px);
}
.update-banner .btn:hover {
  background: rgba(255,255,255,0.3);
}
.update-banner-close {
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  font-size: 16px;
  padding: 0 4px;
  line-height: 1;
  flex-shrink: 0;
}
.update-banner-close:hover {
  color: #fff;
}

/* Gateway 未启动引导横幅 */
.gw-banner {
  background: var(--warning, #f59e0b);
  color: #000;
  padding: 8px 16px;
  font-size: var(--font-size-sm);
  z-index: 100;
  transition: all 300ms ease;
  overflow: hidden;
  max-height: 50px;
}
.gw-banner-hidden {
  max-height: 0;
  padding: 0 16px;
  opacity: 0;
}
.gw-banner-content {
  display: flex;
  align-items: center;
  gap: 8px;
}
.gw-banner-icon {
  font-size: 16px;
}
.gw-banner-close {
  background: none;
  border: none;
  color: rgba(0,0,0,.5);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  margin-left: 8px;
  transition: color .15s;
}
.gw-banner-close:hover { color: rgba(0,0,0,.8); }
.gw-banner .btn {
  margin-left: auto;
  background: rgba(0,0,0,0.15);
  border: none;
  color: #000;
  font-weight: 600;
}

/* === 移动端顶栏 + 侧边栏 === */
.mobile-topbar {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px var(--space-md);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  flex-shrink: 0;
}
.mobile-hamburger {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: none;
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  flex-shrink: 0;
}
.mobile-hamburger:active {
  background: var(--bg-glass-hover);
}
.mobile-topbar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}
.sidebar-close-btn {
  display: none;
  margin-left: auto;
  font-size: 22px;
  color: var(--text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 6px;
  line-height: 1;
}
.sidebar-close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-glass-hover);
}
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 899;
  background: rgba(0,0,0,.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

/* === 移动端响应式 (≤768px) === */
@media (max-width: 768px) {
  .mobile-topbar {
    display: flex;
  }
  .sidebar-close-btn {
    display: block;
  }
  .sidebar-overlay {
    display: block;
  }
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 900;
    transform: translateX(-100%);
    transition: transform 250ms cubic-bezier(.22,1,.36,1);
    box-shadow: none;
    width: 260px;
  }
  #sidebar.sidebar-open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,.15);
  }
  #main-col {
    width: 100vw;
  }
  .page {
    padding: var(--space-lg) var(--space-lg);
  }
  .page-title {
    font-size: var(--font-size-xl);
  }
  .page-header:has(.page-actions) {
    flex-direction: column;
    gap: var(--space-sm);
  }
  .gw-banner-content {
    flex-wrap: wrap;
    font-size: 12px;
    gap: 6px;
  }
  .update-banner-content {
    flex-wrap: wrap;
    gap: 6px;
  }
  .update-banner-text {
    min-width: auto;
  }
}

/* === 小屏手机 (≤480px) === */
@media (max-width: 480px) {
  .page {
    padding: var(--space-md) var(--space-md);
  }
}