/* ==========================================================================
   Дизайн-токены и корневые переменные (docs/DESIGN.md)
   ========================================================================== */
:root {
  /* Шрифты */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Поверхности и фоны */
  --bg-canvas: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-subtle: #f1f5f9;
  --bg-surface-elevated: #ffffff;

  /* Границы */
  --border-subtle: #e2e8f0;
  --border-default: #cbd5e1;
  --border-strong: #94a3b8;

  /* Текст (WCAG 2.1 AA контраст >= 4.5:1 к белому) */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Основной акцент */
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-active: #075985;
  --accent-subtle: #e0f2fe;
  --accent-text: #ffffff;

  /* Семантические статусы */
  --status-success: #16a34a;
  --status-success-bg: #f0fdf4;
  --status-success-border: #bbf7d0;
  --status-success-text: #166534;

  --status-warning: #d97706;
  --status-warning-bg: #fffbeb;
  --status-warning-border: #fde68a;
  --status-warning-text: #92400e;

  --status-critical: #dc2626;
  --status-critical-bg: #fef2f2;
  --status-critical-border: #fecaca;
  --status-critical-text: #991b1b;

  --status-info: #2563eb;
  --status-info-bg: #eff6ff;
  --status-info-border: #bfdbfe;
  --status-info-text: #1e40af;

  /* Сетка отступов (4px / 8px) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1.0rem;   /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2.0rem;   /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3.0rem;  /* 48px */
  --space-16: 4.0rem;  /* 64px */

  /* Скругления */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 14px;
  --radius-pill: 9999px;

  /* Тени */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

/* Тёмная тема */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-canvas: #090d16;
    --bg-surface: #111827;
    --bg-surface-subtle: #1f2937;
    --bg-surface-elevated: #1e293b;

    --border-subtle: #1f2937;
    --border-default: #374151;
    --border-strong: #4b5563;

    --text-primary: #f9fafb;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;

    --accent: #38bdf8;
    --accent-hover: #7dd3fc;
    --accent-active: #0284c7;
    --accent-subtle: #0c4a6e;
    --accent-text: #082f49;

    --status-success: #22c55e;
    --status-success-bg: #052e16;
    --status-success-border: #14532d;
    --status-success-text: #86efac;

    --status-warning: #f59e0b;
    --status-warning-bg: #451a03;
    --status-warning-border: #78350f;
    --status-warning-text: #fcd34d;

    --status-critical: #ef4444;
    --status-critical-bg: #450a0a;
    --status-critical-border: #7f1d1d;
    --status-critical-text: #fca5a5;

    --status-info: #60a5fa;
    --status-info-bg: #172554;
    --status-info-border: #1e3a8a;
    --status-info-text: #93c5fd;
  }
}

/* ==========================================================================
   Базовые стили и нормализация
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  max-width: 100%;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
}

/* Доступность фокуса с двухцветным контрастным контуром (WCAG 2.1 AA >= 3:1) */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.25);
}

/* Skip-link для быстрой навигации с клавиатуры */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: 9999;
  transition: top 0.15s ease-in-out;
}
.skip-link:focus {
  top: 16px;
}

/* Сенсорные цели (Touch targets >= 44x44px) */
.touch-target {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

/* Моноширинный шрифт и табличные цифры */
.font-mono {
  font-family: var(--font-mono);
}
.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* Контейнер адаптивной сетки */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

/* ==========================================================================
   Шапка и навигация
   ========================================================================== */
.app-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.125rem;
}

.brand-logo {
  font-size: 1.25rem;
}

.main-nav .nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-surface-subtle);
}

.nav-link.active {
  color: var(--accent);
  background: var(--accent-subtle);
  font-weight: 600;
}

.user-info .user-greeting {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.logout-form {
  display: inline;
}

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
}

/* ==========================================================================
   Кнопки и формы
   ========================================================================== */
.btn {
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 8px 16px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-primary:active:not(:disabled) {
  background: var(--accent-active);
}

.btn-secondary {
  background: var(--bg-surface-subtle);
  color: var(--text-primary);
  border-color: var(--border-default);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--border-subtle);
  border-color: var(--border-strong);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-default);
}
.btn-outline:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--bg-surface-subtle);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

.btn-block {
  width: 100%;
}

.btn:disabled, .btn[aria-busy="true"] {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Формы */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: var(--space-1);
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  height: 44px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus {
  border-color: var(--accent);
}

.form-input.input-error,
.form-input[aria-invalid="true"] {
  border-color: var(--status-critical);
  background: var(--status-critical-bg);
}

.field-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.text-warning {
  color: var(--status-warning-text);
}

/* ==========================================================================
   Уведомления и алерты (Alerts / Flash)
   ========================================================================== */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-size: 0.875rem;
}

.alert-icon {
  font-weight: 700;
  flex-shrink: 0;
}

.alert-message {
  flex: 1;
}

.alert-success {
  background: var(--status-success-bg);
  border: 1px solid var(--status-success-border);
  color: var(--status-success-text);
}

.alert-warning {
  background: var(--status-warning-bg);
  border: 1px solid var(--status-warning-border);
  color: var(--status-warning-text);
}

.alert-critical {
  background: var(--status-critical-bg);
  border: 1px solid var(--status-critical-border);
  color: var(--status-critical-text);
}

.alert-info {
  background: var(--status-info-bg);
  border: 1px solid var(--status-info-border);
  color: var(--status-info-text);
}

/* ==========================================================================
   Бейджи статусов (Multimodal: цвет + символ + текст)
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-active, .badge-healthy {
  background: var(--status-success-bg);
  color: var(--status-success-text);
  border: 1px solid var(--status-success-border);
}

.badge-standby {
  background: var(--status-info-bg);
  color: var(--status-info-text);
  border: 1px solid var(--status-info-border);
}

.badge-failed {
  background: var(--status-critical-bg);
  color: var(--status-critical-text);
  border: 1px solid var(--status-critical-border);
}

.badge-warning, .badge-degraded {
  background: var(--status-warning-bg);
  color: var(--status-warning-text);
  border: 1px solid var(--status-warning-border);
}

.badge-outdated {
  background: var(--status-warning-bg);
  color: var(--status-warning-text);
  border: 1px solid var(--status-warning-border);
}

.badge-syncing {
  background: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid var(--border-default);
}

.badge-info, .badge-used {
  background: var(--status-info-bg);
  color: var(--status-info-text);
  border: 1px solid var(--status-info-border);
}

.badge-expired {
  background: var(--bg-surface-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border-default);
}

.badge-revoked {
  background: var(--status-critical-bg);
  color: var(--status-critical-text);
  border: 1px solid var(--status-critical-border);
}

/* ==========================================================================
   Страница входа (Auth Card)
   ========================================================================== */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 140px);
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.auth-title {
  margin: 0 0 var(--space-2) 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.auth-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.auth-footer-notice {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.auth-footer-notice .notice-text {
  margin: 0;
  display: flex;
  gap: var(--space-2);
}

/* ==========================================================================
   Кабинет пользователя (User Portal)
   ========================================================================== */
.app-main {
  padding-top: var(--space-6);
  padding-bottom: var(--space-12);
}

.portal-header {
  margin-bottom: var(--space-6);
}

.portal-title {
  margin: 0 0 var(--space-2) 0;
  font-size: 1.75rem;
  font-weight: 700;
}

.portal-greeting {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Карточки секций */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.card-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Сетка реквизитов */
.credentials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.cred-item {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.cred-item-full {
  grid-column: 1 / -1;
}

.cred-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.cred-value-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.cred-code {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cred-code-long {
  word-break: break-all;
  white-space: normal;
}

.password-display-wrapper {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.password-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.copy-btn.copied {
  background: var(--status-success-bg);
  border-color: var(--status-success-border);
  color: var(--status-success-text);
}

.copy-input-group {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  width: 100%;
}

.copy-input-group .copy-input {
  flex: 1;
  min-width: 0;
}

.invite-url-box {
  margin: var(--space-4) 0;
}

@media (max-width: 640px) {
  .copy-input-group {
    flex-direction: column;
    align-items: stretch;
  }
}

.credentials-notice {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-4);
  margin-top: var(--space-4);
}

.credentials-notice p {
  margin: 0;
}

/* ==========================================================================
   Вкладки инструкций подключения (WAI-ARIA Tabs)
   ========================================================================== */
.tabs-container {
  width: 100%;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  border-bottom: 2px solid var(--border-subtle);
  margin-bottom: var(--space-6);
  padding-bottom: 2px;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 10px 14px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: -2px;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface-subtle);
}

.tab-btn.active, .tab-btn[aria-selected="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--bg-surface);
  font-weight: 600;
}

.tab-panel {
  display: block;
}

.tab-panel.hidden {
  display: none;
}

.client-instruction-block {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
}

.instruction-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.instruction-title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
}

.instruction-summary {
  margin: 0 0 var(--space-4) 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.instruction-steps {
  margin: 0 0 var(--space-4) 0;
  padding-left: var(--space-5);
}

.step-item {
  margin-bottom: var(--space-4);
}

.step-desc {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.code-block-wrapper {
  position: relative;
  margin-top: var(--space-2);
  margin-bottom: var(--space-2);
}

.code-block {
  background: var(--bg-canvas);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 0.8125rem;
  overflow-x: auto;
  max-width: 100%;
  white-space: pre-wrap;
  word-break: break-all;
  margin: 0;
}

.code-actions {
  margin-top: var(--space-2);
}

.step-warning {
  font-size: 0.75rem;
  color: var(--status-warning-text);
  margin-top: var(--space-1);
  display: flex;
  gap: 4px;
}

.verification-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-4);
}

.verification-title {
  margin: 0 0 var(--space-1) 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

.verification-desc {
  margin: 0 0 var(--space-2) 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.expected-output {
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.expected-label {
  font-weight: 600;
}

.troubleshooting-details {
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 12px;
}

.troubleshooting-summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
}

.troubleshooting-list {
  margin: var(--space-2) 0 0 0;
  padding-left: var(--space-4);
  color: var(--text-secondary);
}

.troubleshooting-list li {
  margin-bottom: 4px;
}

/* ==========================================================================
   Смена пароля (Security Card)
   ========================================================================== */
.password-form .form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   Подвал
   ========================================================================== */
.app-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-6) 0;
  background: var(--bg-surface);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.footer-text {
  margin: 0;
}

/* ==========================================================================
   Адаптивность (Mobile sm: 640px, xs: 320px)
   ========================================================================== */
@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-default);
    box-shadow: var(--shadow-lg);
    padding: var(--space-4);
  }

  .main-nav.open {
    display: block;
  }

  .main-nav .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .main-nav .nav-item {
    width: 100%;
  }

  .main-nav .nav-link {
    display: block;
    width: 100%;
  }

  .logout-btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .credentials-grid {
    grid-template-columns: 1fr;
  }

  .cred-value-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .copy-btn, .toggle-password-btn {
    width: 100%;
  }

  .password-actions {
    width: 100%;
    margin-top: var(--space-2);
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .card-status-badge {
    align-self: flex-start;
  }

  .instruction-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   Регистрация по приглашению и недействительные ссылки
   ========================================================================== */
.invalid-card {
  text-align: center;
}

.invalid-icon {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.required {
  color: var(--status-critical);
}

.field-error {
  font-size: 0.75rem;
  color: var(--status-critical-text);
  margin-top: var(--space-1);
  display: block;
}

/* ==========================================================================
   Административная панель (Admin UI, docs/DESIGN.md & web-ui-verification.md)
   ========================================================================== */
.admin-subnav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-2) 0;
  margin-bottom: var(--space-6);
}

.subnav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.subnav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.subnav-link {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.subnav-link:hover {
  background: var(--bg-surface-subtle);
  color: var(--text-primary);
}

.subnav-link.active {
  background: var(--accent-subtle);
  color: var(--accent);
  font-weight: 600;
}

.subnav-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-wrap: wrap;
}

.admin-content {
  padding-bottom: var(--space-10);
}

.admin-section {
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 var(--space-4) 0;
  letter-spacing: -0.02em;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.015em;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-unit {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.stat-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-size: 0.8125rem;
}

.dns-arrow {
  color: var(--accent);
  font-weight: bold;
}

.stat-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.stat-link:hover {
  text-decoration: underline;
}

.filter-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
}

.filter-form {
  display: flex;
  gap: var(--space-4);
  align-items: flex-end;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 180px;
  flex: 1;
}

.filter-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.filter-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.table-container {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.responsive-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.responsive-table th {
  background: var(--bg-surface-subtle);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-default);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.responsive-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.responsive-table tbody tr:hover {
  background: var(--bg-surface-subtle);
}

.responsive-table tbody tr:last-child td {
  border-bottom: none;
}

.truncate-cell {
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: middle;
}

.btn-group {
  display: inline-flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.actions-cell {
  white-space: nowrap;
}

.btn-danger {
  background-color: var(--status-critical);
  color: var(--text-inverse);
  border: 1px solid var(--status-critical);
}

.btn-danger:hover {
  background-color: #b91c1c;
}

.btn-outline.btn-danger {
  background-color: transparent;
  color: var(--status-critical);
  border-color: var(--status-critical-border);
}

.btn-outline.btn-danger:hover {
  background-color: var(--status-critical-bg);
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  background: var(--bg-surface);
  border: 1px dashed var(--border-default);
  border-radius: var(--radius-lg);
  margin: 24px 0;
}

.empty-state-icon {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 16px;
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 8px 0;
  color: var(--text-primary);
}

.empty-state-text {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 20px auto;
  line-height: 1.5;
  font-size: 0.875rem;
}

/* Modal Dialogs (<dialog>) */
dialog.modal-dialog {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  padding: 0;
  max-width: 540px;
  width: calc(100% - 32px);
  margin: auto;
}

dialog.modal-dialog::backdrop {
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(2px);
}

.modal-content {
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
}

.dialog-close-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.modal-body {
  padding: 20px;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface-subtle);
}

.consequence-box {
  background: var(--status-warning-bg);
  border: 1px solid var(--status-warning-border);
  color: var(--status-warning-text);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-top: 16px;
}

.consequence-title {
  font-size: 0.8125rem;
  font-weight: 600;
  margin: 0 0 6px 0;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.consequence-list {
  margin: 0;
  padding-left: 20px;
  font-size: 0.8125rem;
  line-height: 1.4;
}

/* ==========================================================================
   Адаптивность таблиц на экранах <= 640px (docs/web-ui-verification.md)
   ========================================================================== */
@media (max-width: 640px) {
  .responsive-table,
  .responsive-table tbody,
  .responsive-table tr,
  .responsive-table td {
    display: block;
    width: 100%;
  }

  .responsive-table thead {
    display: none;
  }

  .responsive-table tr {
    margin-bottom: 12px;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    background: var(--bg-surface);
  }

  .responsive-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
    gap: 4px;
  }

  .responsive-table td:last-child {
    border-bottom: none;
  }

  .responsive-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-secondary);
    margin-right: 12px;
    flex-shrink: 0;
  }

  .truncate-cell {
    max-width: 140px;
  }
}

/* ==========================================================================
   Стили добавления сервера и онбординга (web-add-server)
   ========================================================================== */
.form-container {
  max-width: 760px;
  margin: 0 auto;
}

.form-card {
  padding: var(--space-6);
}

.card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.card-header-icon {
  font-size: 2.2rem;
  line-height: 1;
  flex-shrink: 0;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--space-1) 0;
}

.card-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.form-fieldset {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: var(--space-5) 0;
  background: var(--bg-surface);
}

.form-legend {
  font-weight: 600;
  color: var(--text-primary);
  padding: 0 var(--space-2);
  font-size: 0.95rem;
}

.auth-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.auth-option-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  min-height: 64px;
}

.auth-option-card:hover {
  border-color: var(--border-strong);
}

.auth-option-card.selected {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

.auth-radio {
  margin-top: 4px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.auth-option-title {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.auth-option-desc {
  display: block;
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.auth-panel {
  margin-top: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-surface-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.info-box-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.info-box-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.code-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: 0.8rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  margin: var(--space-2) 0 0 0;
  color: var(--text-primary);
}

.tofu-card {
  margin: var(--space-5) 0;
  padding: var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface-subtle);
}

.tofu-header {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.tofu-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
}

.tofu-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 2px 0;
}

.tofu-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.4;
}

.tofu-probe-action {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin: var(--space-3) 0;
}

.probe-status-text {
  font-size: 0.85rem;
}

.probe-result-box {
  padding: var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin: var(--space-2) 0;
}

.probe-meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.probe-label {
  color: var(--text-secondary);
}

.status-overview-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.status-overview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.meta-dot {
  color: var(--text-muted);
}

.badge-lg {
  padding: 6px 14px;
  font-size: 0.95rem;
  font-weight: 600;
}

.stepper-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.stepper-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  transition: background-color 0.2s, border-color 0.2s;
}

.stepper-item.step-succeeded {
  border-color: var(--status-success-border);
  background: var(--status-success-bg);
}

.stepper-item.step-running {
  border-color: var(--status-info-border);
  background: var(--status-info-bg);
}

.stepper-item.step-failed {
  border-color: var(--status-critical-border);
  background: var(--status-critical-bg);
}

.step-icon-wrapper {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: bold;
  flex-shrink: 0;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-default);
  color: var(--text-muted);
}

.step-succeeded .step-icon-wrapper {
  background: var(--status-success);
  color: #fff;
  border-color: var(--status-success);
}

.step-running .step-icon-wrapper {
  background: var(--status-info);
  color: #fff;
  border-color: var(--status-info);
}

.step-failed .step-icon-wrapper {
  background: var(--status-critical);
  color: #fff;
  border-color: var(--status-critical);
}

.step-content {
  flex: 1;
  min-width: 0;
}

.step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.step-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.step-status-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.terminal-card {
  background: #0b1120;
  color: #f8fafc;
  border-radius: var(--radius-md);
  border: 1px solid #1e293b;
  overflow: hidden;
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #111c30;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid #1e293b;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.terminal-title-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.terminal-icon {
  font-size: 1.1rem;
}

.terminal-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #f1f5f9;
  margin: 0;
}

.sse-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  color: #38bdf8;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38bdf8;
  box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(56, 189, 248, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(56, 189, 248, 0);
  }
}

.log-terminal {
  padding: var(--space-4);
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  color: #e2e8f0;
  max-height: 380px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.onboarding-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
}

@media (max-width: 640px) {
  .form-card {
    padding: var(--space-4);
  }

  .auth-options-grid {
    grid-template-columns: 1fr;
  }

  .onboarding-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .onboarding-actions .btn {
    width: 100%;
    justify-content: center;
  }
}