/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
}

/* Mobile-first responsive design */
.main {
  padding: 0;
  min-height: calc(100vh - 120px);
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  max-width: 100%;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #2563eb;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.user-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-size: 0.875rem;
}

.user-name {
  font-weight: 600;
  color: #374151;
}

.total-time {
  color: #6b7280;
}

/* App Container */
.app-container {
  padding: 1rem;
  max-width: 480px;
  margin: 0 auto;
  min-height: calc(100vh - 120px);
}

/* Cards */
.current-session-card,
.progress-card,
.stat-card,
.recent-sessions {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Session Status */
.session-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.status-indicator {
  font-size: 1.5rem;
}

.status-text {
  font-size: 1.125rem;
  font-weight: 600;
  color: #374151;
}

/* Timer Display */
.timer-display {
  text-align: center;
  margin-bottom: 2rem;
}

.time-digits {
  font-size: 3rem;
  font-weight: 700;
  color: #2563eb;
  font-family: "Monaco", "Menlo", monospace;
  line-height: 1;
}

.time-label {
  font-size: 0.875rem;
  color: #6b7280;
  margin-top: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 48px; /* Touch-friendly */
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  min-height: 56px;
  width: 100%;
}

.btn-primary {
  background: #2563eb;
  color: white;
}

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

.btn-success {
  background: #059669;
  color: white;
}

.btn-success:hover {
  background: #047857;
  transform: translateY(-1px);
}

.btn-danger {
  background: #dc2626;
  color: white;
}

.btn-danger:hover {
  background: #b91c1c;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #6b7280;
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid #6b7280;
  color: #6b7280;
}

.btn-icon {
  font-size: 1.2em;
}

/* Progress Bar */
.progress-card h3 {
  margin-bottom: 1rem;
  color: #374151;
  font-size: 1.125rem;
}

.progress-bar-container {
  margin-bottom: 0.75rem;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: #e5e7eb;
  border-radius: 6px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #059669 0%, #10b981 100%);
  border-radius: 6px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.875rem;
  color: #6b7280;
  text-align: center;
}

.progress-hours {
  font-size: 1rem;
  font-weight: 600;
  color: #374151;
  text-align: center;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.stat-card {
  text-align: center;
  padding: 1rem;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: #2563eb;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  color: #6b7280;
}

/* Sessions List */
.sessions-list {
  max-height: 200px;
  overflow-y: auto;
}

.session-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  border-bottom: 1px solid #e5e7eb;
  last-child: {
    border-bottom: none;
  }
}

.session-duration {
  font-weight: 600;
  color: #2563eb;
}

.session-time {
  font-size: 0.875rem;
  color: #6b7280;
}

.empty-state {
  text-align: center;
  color: #6b7280;
  font-style: italic;
  padding: 2rem 1rem;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-content {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  max-width: 400px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content h2,
.modal-content h3 {
  margin-bottom: 1rem;
  color: #374151;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #374151;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #2563eb;
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.form-actions .btn {
  flex: 1;
}

/* Loading and Error States */
.loading-state,
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: 2rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #e5e7eb;
  border-top: 4px solid #2563eb;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

/* Footer */
.footer {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  text-align: center;
  padding: 1rem;
  color: white;
  font-size: 0.875rem;
}

/* ADMIN STYLES */
.admin-body {
  background: #f8fafc;
}

.admin-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #e5e7eb;
}

.dashboard-header h2 {
  color: #374151;
  font-size: 2rem;
}

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

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

.admin-stat-card {
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  text-align: center;
  border: 1px solid #e5e7eb;
}

.admin-section {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border: 1px solid #e5e7eb;
}

.admin-section h3 {
  color: #374151;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

/* Table Styles */
.table-container {
  overflow-x: auto;
}

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

.admin-table th,
.admin-table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

.admin-table th {
  background: #f8fafc;
  font-weight: 600;
  color: #374151;
}

.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.active {
  background: #dcfce7;
  color: #166534;
}

.status-badge.inactive {
  background: #f3f4f6;
  color: #6b7280;
}

.progress-mini {
  width: 100px;
  height: 6px;
  background: #e5e7eb;
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.25rem;
}

.progress-fill-mini {
  height: 100%;
  background: #10b981;
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Analytics */
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.analytics-card {
  background: #f8fafc;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.analytics-card h4 {
  color: #374151;
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.chart-container,
.analytics-list {
  min-height: 150px;
}

.pattern-item,
.abnormal-item {
  padding: 0.5rem 0;
  border-bottom: 1px solid #e5e7eb;
}

.activity-feed {
  max-height: 300px;
  overflow-y: auto;
}

.activity-item {
  display: flex;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid #e5e7eb;
}

.activity-time {
  font-size: 0.75rem;
  color: #6b7280;
  min-width: 80px;
}

.activity-text {
  color: #374151;
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-container {
    padding: 0.5rem;
  }

  .header-content {
    padding: 0.75rem;
  }

  .header-title {
    font-size: 1.25rem;
  }

  .time-digits {
    font-size: 2.5rem;
  }

  .admin-container {
    padding: 1rem;
  }

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

  .admin-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .analytics-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .form-actions {
    flex-direction: column;
  }

  .admin-stats-grid {
    grid-template-columns: 1fr;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  .modal-content,
  .admin-section,
  .admin-stat-card {
    background: #1f2937;
    color: #f9fafb;
  }

  .admin-table th {
    background: #374151;
    color: #f9fafb;
  }

  .analytics-card {
    background: #374151;
    color: #f9fafb;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
.btn:focus,
input:focus,
textarea:focus {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}