/* Modern Light Theme - API2 Frontend */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Primary Colors - Blue/Indigo */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Success */
  --success-50: #f0fdf4;
  --success-500: #22c55e;
  --success-600: #16a34a;

  /* Warning */
  --warning-50: #fffbeb;
  --warning-500: #f59e0b;
  --warning-600: #d97706;

  /* Error */
  --error-50: #fef2f2;
  --error-500: #ef4444;
  --error-600: #dc2626;

  /* Danger (alias for error — used across dashboard) */
  --danger-50: #fef2f2;
  --danger-100: #fee2e2;
  --danger-200: #fecaca;
  --danger-300: #fca5a5;
  --danger-500: #ef4444;
  --danger-600: #dc2626;
  --danger-700: #b91c1c;

  /* Extended Success */
  --success-100: #dcfce7;
  --success-200: #bbf7d0;
  --success-300: #86efac;
  --success-700: #15803d;
  --success-800: #166534;

  /* Extended Warning */
  --warning-200: #fde68a;
  --warning-700: #a16207;
  --warning-800: #92400e;

  /* Neutral/Gray */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--gray-800);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Card Component */
.card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  transition: all var(--transition-base);
}

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

.card-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
}

/* Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.25rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  min-height: 2.75rem; /* 44px WCAG touch target */
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

.btn-success {
  background: linear-gradient(135deg, var(--success-600), var(--success-500));
  color: white;
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning-600), var(--warning-500));
  color: white;
}

.btn-danger {
  background: linear-gradient(135deg, var(--error-600), var(--error-500));
  color: white;
}

.btn-outline {
  background: white;
  color: var(--gray-600);
  border: 1px solid var(--gray-300);
}

.btn-outline:hover:not(:disabled) {
  background: var(--gray-50);
  border-color: var(--gray-400);
  color: var(--gray-700);
}

.btn-danger-outline {
  background: white;
  color: var(--error-600);
  border: 1px solid var(--error-300, #fca5a5);
}

.btn-danger-outline:hover:not(:disabled) {
  background: var(--error-50, #fef2f2);
  border-color: var(--error-400, #f87171);
  color: var(--error-700, #b91c1c);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

/* Form Components */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--gray-900);
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-error {
  margin-top: 0.375rem;
  font-size: 0.875rem;
  color: var(--error-600);
}

/* Badge Component */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 9999px;
  white-space: nowrap;
}

.badge-primary {
  background: var(--primary-100);
  color: var(--primary-700);
}

.badge-success {
  background: var(--success-50);
  color: var(--success-600);
}

.badge-warning {
  background: var(--warning-50);
  color: var(--warning-600);
}

.badge-danger {
  background: var(--error-50);
  color: var(--error-600);
}

.badge-gray {
  background: var(--gray-100);
  color: var(--gray-600);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
  max-width: 400px;
}

.toast {
  pointer-events: auto;
  background: white;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-left: 4px solid var(--primary-500);
  animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 320px;
}

.toast.toast-success {
  border-left-color: var(--success-500);
}

.toast.toast-warning {
  border-left-color: var(--warning-500);
}

.toast.toast-error {
  border-left-color: var(--error-500);
}

.toast-icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--gray-900);
  margin-bottom: 0.25rem;
}

.toast-message {
  font-size: 0.8125rem;
  color: var(--gray-600);
}

.toast-close {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-400);
  transition: color var(--transition-fast);
  padding: 0;
}

.toast-close:hover {
  color: var(--gray-600);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  padding: 1rem;
  animation: fadeIn 0.2s ease-out;
}

.modal {
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUpModal 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--gray-200);
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* Navigation */
.navbar {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  max-width: 1280px;
  margin: 0 auto;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  text-decoration: none;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Sidebar — warm palette: dark charcoal + coral accents */
.sidebar {
  width: 280px;
  background: #1A1A2E;
  border-right: none;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  overflow-y: auto;
  transition: transform var(--transition-base);
  z-index: 50;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-nav {
  padding: 1rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  font-weight: 500;
  font-size: 0.9375rem;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
}

.sidebar-link.active {
  background: rgba(255, 107, 53, 0.15);
  color: #FF6B35;
  box-shadow: none;
  border-left: 3px solid #FF6B35;
}

/* Sidebar collapsed state */
.sidebar.collapsed {
  transform: translateX(-100%);
}

.sidebar.collapsed + .main-content,
.main-content.sidebar-collapsed {
  margin-left: 0;
}

.sidebar-toggle-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: rgba(255, 255, 255, 0.5);
  padding: 0.625rem;
  min-width: 2.75rem; /* 44px WCAG touch target */
  min-height: 2.75rem; /* 44px WCAG touch target */
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.sidebar-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Sidebar toggle in main content area (hamburger) — keep light theme */
.main-content .sidebar-toggle-btn {
  border-color: var(--gray-200);
  color: var(--gray-600);
}

.main-content .sidebar-toggle-btn:hover {
  background: var(--gray-50);
  color: var(--gray-900);
  border-color: var(--gray-300);
}

/* Mobile sidebar overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 40;
}

.sidebar.open ~ .sidebar-overlay {
  display: block;
}

/* Calendar Styles */
.calendar-container {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.calendar-header {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  color: white;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calendar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.calendar-nav-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.calendar-nav-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--gray-200);
}

.calendar-day-header {
  background: var(--gray-100);
  padding: 0.75rem;
  text-align: center;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--gray-600);
}

.calendar-day {
  background: white;
  min-height: 120px;
  padding: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.calendar-day:hover {
  background: var(--gray-50);
}

.calendar-day.today {
  background: var(--primary-50);
}

.calendar-day-number {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.calendar-event {
  background: var(--primary-100);
  color: var(--primary-700);
  padding: 0.375rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  margin-bottom: 0.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.calendar-event:hover {
  background: var(--primary-200);
  transform: translateY(-1px);
}

/* Stat Card */
.stat-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
}

.stat-change {
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.stat-change.positive {
  color: var(--success-600);
}

.stat-change.negative {
  color: var(--error-600);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes slideUpModal {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Loading Spinner */
.spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary-600);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 0.75rem;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  /* Show hamburger button on mobile regardless of sidebar collapsed state */
  #sidebar-expand-btn {
    display: flex !important;
  }

  .toast-container {
    left: 1rem;
    right: 1rem;
  }

  .toast {
    min-width: auto;
  }
}

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