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

:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --background: #f8fafc;
  --surface: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Hero Section */
.hero-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 2rem;
}

.hero-content {
  text-align: center;
  color: white;
  max-width: 600px;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Authentication Pages */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
  background: var(--surface);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 450px;
}

.auth-card h1 {
  margin-bottom: 1.5rem;
  font-size: 1.875rem;
  text-align: center;
}

.auth-link {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-secondary);
}

.auth-link a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

/* Header */
.main-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header-logo a {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.header-nav {
  display: flex;
  gap: 1.5rem;
  flex: 1;
}

.header-nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.header-nav a:hover {
  color: var(--primary-color);
}

.header-user {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-container {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 800px;
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.form-inline {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: white;
}

.btn-secondary:hover {
  background-color: #475569;
}

.btn-full {
  width: 100%;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--surface);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-open .stat-value {
  color: var(--warning-color);
}

.stat-progress .stat-value {
  color: var(--primary-color);
}

.stat-closed .stat-value {
  color: var(--success-color);
}

/* Tickets */
.tickets-container {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.tickets-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  gap: 1.5rem;
}

.tickets-header h2 {
  margin: 0;
  font-size: 1.5rem;
}

.sort-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.sort-controls label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.sort-select {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.875rem;
  background-color: var(--surface);
  cursor: pointer;
  transition: border-color 0.2s;
}

.sort-select:hover {
  border-color: var(--primary-color);
}

.sort-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.btn-sort-order {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  background-color: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-sort-order:hover {
  background-color: var(--background);
  border-color: var(--primary-color);
}

.tickets-container h2 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.tickets-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.ticket-card {
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 8px;
  transition: box-shadow 0.2s;
}

.ticket-card:hover {
  box-shadow: var(--shadow);
}

.ticket-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  gap: 1rem;
}

.ticket-header h3 {
  font-size: 1.25rem;
  margin: 0;
}

.ticket-header h3 a {
  color: var(--text-primary);
  text-decoration: none;
}

.ticket-header h3 a:hover {
  color: var(--primary-color);
}

.ticket-badges {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.ticket-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.ticket-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.no-tickets {
  text-align: center;
  color: var(--text-secondary);
  padding: 2rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-status.badge-open {
  background-color: #fef3c7;
  color: #92400e;
}

.badge-status.badge-in_progress {
  background-color: #dbeafe;
  color: #1e40af;
}

.badge-status.badge-closed {
  background-color: #d1fae5;
  color: #065f46;
}

.badge-priority.badge-low {
  background-color: #e5e7eb;
  color: #374151;
}

.badge-priority.badge-medium {
  background-color: #dbeafe;
  color: #1e40af;
}

.badge-priority.badge-high {
  background-color: #fed7aa;
  color: #9a3412;
}

.badge-priority.badge-urgent {
  background-color: #fecaca;
  color: #991b1b;
}

.badge-admin {
  background-color: #e0e7ff;
  color: #3730a3;
}

/* Ticket Detail */
.ticket-detail-container {
  display: grid;
  gap: 2rem;
}

.ticket-detail-card {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.ticket-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.ticket-detail-header h2 {
  font-size: 1.875rem;
  margin: 0;
}

.ticket-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  padding: 1rem;
  background-color: var(--background);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.meta-item {
  font-size: 0.875rem;
}

.meta-item strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text-secondary);
}

.ticket-description {
  margin-bottom: 2rem;
}

.ticket-description h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.ticket-description p {
  line-height: 1.75;
  color: var(--text-secondary);
}

.admin-actions {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.admin-actions h3 {
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.status-form {
  margin-top: 1rem;
}

/* Comments */
.comments-section {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.comments-section h3 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.comments-list {
  margin-bottom: 2rem;
}

.comment {
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.comment:last-child {
  margin-bottom: 0;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.comment-date {
  margin-left: auto;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.comment-body {
  color: var(--text-secondary);
  line-height: 1.75;
}

.add-comment {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.add-comment h4 {
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

/* Admin Panel */
.admin-section {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.admin-section h2 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.table-container {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table thead {
  background-color: var(--background);
}

.data-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.data-table td {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
  background-color: var(--background);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2rem;
  }

  .header-container {
    flex-direction: column;
    align-items: stretch;
  }

  .header-nav {
    flex-direction: column;
    gap: 0.5rem;
  }

  .header-user {
    flex-direction: column;
    align-items: stretch;
  }

  .page-header {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .ticket-header {
    flex-direction: column;
  }

  .ticket-badges {
    flex-direction: column;
  }

  .form-inline {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .tickets-header {
    flex-direction: column;
    align-items: stretch;
  }

  .sort-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .sort-controls label {
    display: none;
  }
}