:root {
  --primary: #6aaa47;
  --primary-hover: #5a9540;
  --primary-light: #e8f5e0;
  --secondary: #C62828;
  --accent: #D4A017;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #3B82F6;
  
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  --bg-card: #FFFFFF;
  
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-inverse: #FFFFFF;
  
  --border-color: #E5E7EB;
  --border-light: #F3F4F6;
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --sidebar-width: 260px;
  --navbar-height: 64px;
}

[data-theme="dark"] {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --bg-card: #1E293B;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-tertiary: #64748B;
  --border-color: #334155;
  --border-light: #1E293B;
  --primary-light: #1a2e10;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --bg-card: #1E293B;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-tertiary: #64748B;
    --border-color: #334155;
    --border-light: #1E293B;
    --primary-light: #1a2e10;
  }
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-primary); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-md);
  font-weight: 500; font-size: 0.875rem; line-height: 1.5;
  border: 1px solid transparent; cursor: pointer;
  transition: all var(--transition-fast); white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border-color: var(--border-color); }
.btn-secondary:hover { background: var(--border-color); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-warning { background: var(--warning); color: white; }
.btn-outline { background: transparent; border-color: var(--border-color); color: var(--text-primary); }
.btn-outline:hover { background: var(--bg-tertiary); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-sm { padding: 6px 12px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-icon { padding: 10px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border-color); box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-body { padding: 24px; }
.card-header { padding: 20px 24px; border-bottom: 1px solid var(--border-color); }
.card-footer { padding: 16px 24px; border-top: 1px solid var(--border-color); }

.form-control, .form-select {
  width: 100%; padding: 10px 14px; font-size: 0.875rem;
  background: var(--bg-primary); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-control:focus, .form-select:focus {
  border-color: var(--primary); outline: none;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}
.form-label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 0.875rem; color: var(--text-primary); }
.form-text { font-size: 0.8125rem; color: var(--text-tertiary); margin-top: 4px; }
.form-check-input:checked { background-color: var(--primary); border-color: var(--primary); }

.table { width: 100%; border-collapse: collapse; }
.table th { padding: 12px 16px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); text-align: left; }
.table td { padding: 12px 16px; font-size: 0.875rem; border-bottom: 1px solid var(--border-light); vertical-align: middle; }
.table tbody tr { transition: background var(--transition-fast); }
.table tbody tr:hover { background: var(--bg-secondary); }

.badge { display: inline-flex; align-items: center; padding: 4px 10px; font-size: 0.75rem; font-weight: 500; border-radius: var(--radius-full); }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: #D1FAE5; color: #065F46; }
.badge-warning { background: #FEF3C7; color: #92400E; }
.badge-danger { background: #FEE2E2; color: #991B1B; }
.badge-info { background: #DBEAFE; color: #1E40AF; }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1050; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: all var(--transition-normal); }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal-content { background: var(--bg-card); border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); width: 90%; max-width: 500px; max-height: 90vh; overflow-y: auto; transform: translateY(20px); transition: transform var(--transition-normal); }
.modal-overlay.active .modal-content { transform: translateY(0); }
.modal-header { padding: 20px 24px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border-color); display: flex; justify-content: flex-end; gap: 8px; }

.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 14px 20px; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); min-width: 300px; display: flex; align-items: center; gap: 10px; animation: slideInRight 0.3s ease; border-left: 4px solid; }
.toast-success { background: #F0FDF4; border-color: var(--success); color: #065F46; }
.toast-error { background: #FEF2F2; border-color: var(--danger); color: #991B1B; }
.toast-warning { background: #FFFBEB; border-color: var(--warning); color: #92400E; }
.toast-info { background: #EFF6FF; border-color: var(--info); color: #1E40AF; }

.skeleton { background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--border-color) 50%, var(--bg-tertiary) 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; border-radius: var(--radius-md); }
.skeleton-text { height: 16px; margin-bottom: 8px; }
.skeleton-title { height: 24px; width: 60%; margin-bottom: 12px; }
.skeleton-avatar { width: 40px; height: 40px; border-radius: var(--radius-full); }
.skeleton-card { height: 200px; }

.empty-state { text-align: center; padding: 60px 20px; }
.empty-state i { font-size: 3rem; color: var(--text-tertiary); margin-bottom: 16px; }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { color: var(--text-tertiary); max-width: 400px; margin: 0 auto 20px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(100px); } to { opacity: 1; transform: translateX(0); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
@keyframes spin { to { transform: rotate(360deg); } }

.animate-fadeIn { animation: fadeIn 0.3s ease; }
.animate-slideUp { animation: slideUp 0.4s ease; }
.animate-slideDown { animation: slideDown 0.4s ease; }

.spinner { width: 20px; height: 20px; border: 2px solid var(--border-color); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.6s linear infinite; display: inline-block; }
.spinner-lg { width: 40px; height: 40px; border-width: 3px; }

.loading-overlay { position: fixed; inset: 0; background: rgba(255,255,255,0.8); z-index: 9998; display: flex; align-items: center; justify-content: center; }

@media (max-width: 992px) {
  .container { max-width: 100%; padding-left: 16px; padding-right: 16px; }
}
@media (max-width: 768px) {
  :root { --sidebar-width: 0px; --navbar-height: 56px; }
  .card-body { padding: 16px; }
  .card-header { padding: 14px 16px; }
  .table-responsive { font-size: 0.8125rem; border-radius: var(--radius-md); }
  .table th, .table td { padding: 10px 12px; }
  .modal-content { max-width: calc(100vw - 32px); }
  .modal-header, .modal-body, .modal-footer { padding: 16px; }
  .toast-container { left: 10px; right: 10px; top: 12px; }
  .toast { min-width: auto; font-size: 0.8125rem; padding: 12px 16px; }
  .btn { padding: 8px 16px; }
  .btn-lg { padding: 12px 20px; font-size: 0.9375rem; }
  .d-mobile-none { display: none !important; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.125rem; }
  .page-content { padding: 16px; }
  .dropdown-menu { min-width: 200px; }
  .form-control, .form-select { padding: 10px 12px; }
}
@media (max-width: 576px) {
  .card-body { padding: 12px; }
  .card-header { padding: 12px; }
  .btn { padding: 7px 14px; font-size: 0.8125rem; }
  .btn-lg { padding: 10px 18px; font-size: 0.875rem; }
  .badge { padding: 3px 8px; font-size: 0.6875rem; }
}

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

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }