:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-surface-secondary: #f9fafb;
  --color-surface-tertiary: #f0f2f5;
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;
  --color-text-primary: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-tertiary: #718096;
  --color-text-inverse: #ffffff;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-success: #16a34a;
  --color-success-light: #f0fdf4;
  --color-error: #dc2626;
  --color-error-light: #fef2f2;
  --color-warning: #d97706;
  --color-warning-light: #fffbeb;
  --color-info: #0891b2;
  --color-info-light: #ecfeff;
  --color-sidebar-bg: #111827;
  --color-sidebar-text: #d1d5db;
  --color-sidebar-active: #2563eb;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-base: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --sidebar-width: 240px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-base);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.brand-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-sidebar-text);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-base) 0;
}

.nav-list {
  list-style: none;
  padding: 0 var(--space-sm);
}

.nav-item {
  margin-bottom: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-sm);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-sidebar-text);
  transition: background-color 0.15s, color 0.15s;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.nav-link.active {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.nav-link i {
  width: 18px;
  text-align: center;
  font-size: 0.875rem;
}

.sidebar-footer {
  padding: var(--space-base);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.admin-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 0;
}

.admin-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-inverse);
  flex-shrink: 0;
}

.admin-meta {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.admin-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-sidebar-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-role {
  font-size: 0.6875rem;
  color: rgba(209, 213, 219, 0.6);
}

.btn-logout {
  background: transparent;
  border: none;
  color: rgba(209, 213, 219, 0.6);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  line-height: 1;
  transition: color 0.15s;
}

.btn-logout:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.logout-form {
  flex-shrink: 0;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-xl);
  max-width: 100%;
  overflow: hidden;
}

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

.page-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.page-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

.back-btn {
  margin-right: var(--space-xs);
}

.section-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  margin-bottom: var(--space-base);
}

.section-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-base) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.section-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.5;
}

.section-card-title-sm {
  font-size: 0.875rem;
  padding: var(--space-base);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 0;
}

.section-card-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  padding: 0 var(--space-base) var(--space-xs);
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-base);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-base);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.stat-icon-blue { background-color: #eff6ff; color: #2563eb; }
.stat-icon-orange { background-color: #fff7ed; color: #ea580c; }
.stat-icon-green { background-color: #f0fdf4; color: #16a34a; }
.stat-icon-teal { background-color: #ecfeff; color: #0891b2; }

.stat-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table thead th {
  background-color: var(--color-surface-secondary);
  padding: 10px var(--space-base);
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-border);
}

.data-table tbody td {
  padding: 12px var(--space-base);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-primary);
  vertical-align: middle;
}

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

.ticket-no {
  font-family: 'Courier New', monospace;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-surface-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.ticket-title-cell {
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.status-open { background-color: #eff6ff; color: #2563eb; }
.status-in_progress { background-color: #fff7ed; color: #ea580c; }
.status-waiting { background-color: #fffbeb; color: #d97706; }
.status-resolved { background-color: #f0fdf4; color: #16a34a; }
.status-closed { background-color: #f1f5f9; color: #475569; }

.priority-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.priority-low { background-color: #f0fdf4; color: #16a34a; }
.priority-medium { background-color: #fffbeb; color: #d97706; }
.priority-high { background-color: #fff7ed; color: #ea580c; }
.priority-critical { background-color: #fef2f2; color: #dc2626; }

.user-cell {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.user-avatar-sm {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-inverse);
  flex-shrink: 0;
}

.actions-cell {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  white-space: nowrap;
}

.inline-form {
  display: inline;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-danger {
  background-color: var(--color-error);
  color: var(--color-text-inverse);
  border-color: var(--color-error);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8125rem;
}

.btn-full {
  width: 100%;
}

.form-group {
  margin-bottom: var(--space-base);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
  line-height: 1.4;
}

.required {
  color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  line-height: 1.5;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: flex-end;
  margin-top: var(--space-base);
}

.input-wrapper {
  position: relative;
}

.input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
  pointer-events: none;
}

.input-with-icon {
  padding-left: 36px;
}

.filter-bar {
  margin-bottom: var(--space-base);
}

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

.filter-group {
  min-width: 180px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xxl) var(--space-xl);
  gap: var(--space-sm);
}

.empty-state-icon {
  font-size: 3rem;
  color: var(--color-border);
}

.empty-state-text {
  font-size: 0.9375rem;
  color: var(--color-text-tertiary);
  text-align: center;
}

.empty-message {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  text-align: center;
  padding: var(--space-base);
}

.alert {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px var(--space-base);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-base);
}

.alert i {
  flex-shrink: 0;
  font-size: 1rem;
  line-height: 1;
}

.alert-success { background-color: var(--color-success-light); color: var(--color-success); }
.alert-error { background-color: var(--color-error-light); color: var(--color-error); }
.alert-warning { background-color: var(--color-warning-light); color: var(--color-warning); }

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-base);
  border-top: 1px solid var(--color-border-light);
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  text-decoration: none;
  transition: background-color 0.15s;
}

.page-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.page-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.ticket-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-base);
  align-items: start;
}

.ticket-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-sm) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  flex-wrap: wrap;
}

.ticket-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.ticket-description {
  padding: var(--space-lg);
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  line-height: 1.7;
  white-space: pre-wrap;
}

.message-thread {
  padding: var(--space-base) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-base);
  max-height: 500px;
  overflow-y: auto;
}

.message-item {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
}

.message-admin {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-inverse);
  flex-shrink: 0;
}

.message-bubble {
  max-width: 70%;
  background-color: var(--color-surface-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-base);
  border: 1px solid var(--color-border-light);
}

.message-admin .message-bubble {
  background-color: var(--color-primary-light);
  border-color: rgba(37, 99, 235, 0.2);
}

.message-internal .message-bubble {
  background-color: #fffbeb;
  border-color: #fde68a;
}

.message-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: 4px;
}

.message-sender {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.message-time {
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
}

.message-content {
  font-size: 0.875rem;
  color: var(--color-text-primary);
  line-height: 1.6;
  white-space: pre-wrap;
}

.internal-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: #d97706;
  background-color: #fffbeb;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  border: 1px solid #fde68a;
}

.reply-form-container {
  padding: var(--space-base) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.reply-type-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: var(--space-sm);
}

.reply-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  transition: background-color 0.15s;
}

.reply-tab.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.reply-tab:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.reply-actions {
  display: flex;
  justify-content: flex-end;
}

.info-card {
  padding: var(--space-base);
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.info-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.8125rem;
}

.info-row:last-child {
  border-bottom: none;
}

.info-row dt {
  font-weight: 500;
  color: var(--color-text-secondary);
  min-width: 90px;
  flex-shrink: 0;
}

.info-row dd {
  color: var(--color-text-primary);
}

.ban-reason-text {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding: var(--space-sm) var(--space-base);
  background-color: var(--color-error-light);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.action-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  background-color: var(--color-surface-tertiary);
  color: var(--color-text-secondary);
  font-family: 'Courier New', monospace;
}

.ip-code {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  background-color: var(--color-surface-tertiary);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.text-nowrap { white-space: nowrap; }

.two-col-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-base);
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-base);
  align-items: start;
}

.settings-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-base);
}

.radio-group {
  display: flex;
  align-items: center;
  gap: var(--space-base);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-text-primary);
  cursor: pointer;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-base);
}

.modal-overlay[hidden] {
  display: none;
}

.modal-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

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

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.modal-close:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.modal-body {
  padding: var(--space-lg);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-base) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  z-index: 500;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px var(--space-base);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-inverse);
  box-shadow: 0 4px 16px var(--color-shadow);
  pointer-events: all;
  min-width: 280px;
  max-width: 400px;
  animation: slideInRight 0.25s ease;
}

.toast-success { background-color: var(--color-success); }
.toast-error { background-color: var(--color-error); }
.toast-warning { background-color: #d97706; }
.toast-info { background-color: var(--color-info); }

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-color: var(--color-bg);
}

.auth-container {
  width: 100%;
  max-width: 440px;
  padding: var(--space-base);
}

.auth-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 32px var(--color-shadow);
}

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

.auth-logo-img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  margin-bottom: var(--space-base);
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

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

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-base);
}

.auth-back-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  margin-top: var(--space-sm);
}

.otp-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-sm);
}

.otp-input {
  width: 100%;
  aspect-ratio: 1;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color 0.15s;
}

.otp-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.error-page {
  text-align: center;
  padding: var(--space-xxl);
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-base);
}

.error-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .ticket-layout { grid-template-columns: 1fr; }
  .two-col-grid { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.25s; }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: var(--space-base); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .filter-form { flex-direction: column; align-items: stretch; }
  .filter-group { min-width: unset; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .data-table { min-width: 640px; }
  .otp-grid { gap: 6px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .auth-card { padding: var(--space-lg); }
}

@media print {
  .sidebar, .filter-bar, .btn, .pagination { display: none; }
  .main-content { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}