/* ===========================================
   IVERLAND LISTE - MINIMALIST DESIGN SYSTEM
   =========================================== */

/* Color Variables */
:root {
  /* Monochrome Palette */
  --color-primary: #1a1a1a;
  --color-secondary: #4a4a4a;
  --color-tertiary: #6b7280;
  
  /* Accent Colors */
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Neutral Grays */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  
  /* Text Colors */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  
  /* Borders */
  --border-color: #e5e7eb;
  --border-radius: 0.75rem;
  --border-radius-lg: 1rem;
  
  /* 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);
  
  /* Transitions */
  --transition: all 0.2s ease;
  --transition-slow: all 0.3s ease;
}

/* Dark Mode Variables */
.dark {
  --color-primary: #f9fafb;
  --color-secondary: #d1d5db;
  --color-tertiary: #9ca3af;
  
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #64748b;
  
  --border-color: #334155;
}

/* ===========================================
   GLOBAL STYLES
   =========================================== */

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

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

/* ===========================================
   GLASS MORPHISM EFFECTS
   =========================================== */

.glass-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-slow);
}

.dark .glass-card {
  background: rgba(30, 41, 59, 0.95);
  border-color: var(--border-color);
}

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

/* Sidebar Glass Effect */
.glass-sidebar {
  background: rgba(26, 26, 26, 0.98);
  backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.dark .glass-sidebar {
  background: rgba(15, 23, 42, 0.98);
}

/* ===========================================
   BUTTONS
   =========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Accent Button */
.btn-accent {
  background: var(--color-accent);
  color: white;
}

.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-200);
  border-color: var(--color-gray-300);
}

.dark .btn-secondary {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

/* Success Button */
.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: #059669;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Error Button */
.btn-error {
  background: var(--color-error);
  color: white;
}

.btn-error:hover:not(:disabled) {
  background: #dc2626;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Shimmer Effect on Buttons */
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

/* Icon Buttons */
.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: var(--border-radius);
}

/* ===========================================
   INPUTS
   =========================================== */

.input,
.textarea,
.select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input:disabled,
.textarea:disabled,
.select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--bg-tertiary);
}

.dark .input,
.dark .textarea,
.dark .select {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
}

/* Input with Icon */
.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group .input-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-tertiary);
  pointer-events: none;
}

.input-group .input {
  padding-left: 3rem;
}

/* ===========================================
   NAVIGATION
   =========================================== */

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
  transform: translateX(4px);
}

.nav-item.active {
  background: rgba(37, 99, 235, 0.15);
  color: #3b82f6;
  border-left: 3px solid #3b82f6;
}

.nav-item.active::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: #3b82f6;
  border-radius: 2px 0 0 2px;
}

/* ===========================================
   BADGES
   =========================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-primary {
  background: rgba(26, 26, 26, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(26, 26, 26, 0.2);
}

.badge-accent {
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ===========================================
   CARDS
   =========================================== */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: var(--transition-slow);
}

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

.dark .card {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

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

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-body {
  color: var(--text-secondary);
}

.card-footer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* ===========================================
   STATS CARDS
   =========================================== */

.stat-card {
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, rgba(37, 99, 235, 0.05) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-md);
}

.stat-icon-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.stat-icon-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
}

.stat-icon-success {
  background: linear-gradient(135deg, var(--color-success), #059669);
}

.stat-icon-warning {
  background: linear-gradient(135deg, var(--color-warning), #d97706);
}

/* ===========================================
   TABLES
   =========================================== */

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.table thead {
  background: var(--bg-tertiary);
}

.table th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-color);
}

.table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.table tbody tr {
  transition: var(--transition);
}

.table tbody tr:hover {
  background: var(--bg-secondary);
}

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

/* Editable Table Cells */
.table td[contenteditable="true"] {
  cursor: text;
  position: relative;
}

.table td[contenteditable="true"]:hover {
  background: rgba(37, 99, 235, 0.05);
}

.table td[contenteditable="true"]:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  background: rgba(37, 99, 235, 0.05);
}

/* ===========================================
   MODALS
   =========================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  animation: slideUp 0.3s ease;
}

.dark .modal {
  background: var(--bg-secondary);
}

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

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  display: flex;
  gap: 0.75rem;
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
}

/* ===========================================
   TOAST NOTIFICATIONS
   =========================================== */

.toast {
  position: fixed;
  top: 1rem;
  right: 1rem;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: white;
  font-weight: 500;
  z-index: 10000;
  animation: slideInRight 0.3s ease;
  min-width: 300px;
}

.toast-success {
  background: var(--color-success);
}

.toast-error {
  background: var(--color-error);
}

.toast-warning {
  background: var(--color-warning);
}

.toast-info {
  background: var(--color-accent);
}

/* ===========================================
   ANIMATIONS
   =========================================== */

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

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

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

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

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

/* Animation Utilities */
.animate-fade-in {
  animation: fadeIn 0.3s ease;
}

.animate-slide-up {
  animation: slideUp 0.3s ease;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

/* ===========================================
   LOADING STATES
   =========================================== */

.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--border-radius);
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.loading-spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ===========================================
   UTILITY CLASSES
   =========================================== */

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

.text-secondary {
  color: var(--text-secondary);
}

.text-tertiary {
  color: var(--text-tertiary);
}

.text-accent {
  color: var(--color-accent);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

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

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

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

.bg-tertiary {
  background-color: var(--bg-tertiary);
}

.border-color {
  border-color: var(--border-color);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}

.shadow {
  box-shadow: var(--shadow);
}

.shadow-md {
  box-shadow: var(--shadow-md);
}

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

.shadow-xl {
  box-shadow: var(--shadow-xl);
}

/* ===========================================
   RESPONSIVE UTILITIES
   =========================================== */

@media (max-width: 640px) {
  .glass-card {
    border-radius: var(--border-radius);
  }
  
  .modal {
    max-width: 95vw;
  }
  
  .toast {
    min-width: auto;
    left: 1rem;
    right: 1rem;
  }
}

/* ===========================================
   ACCESSIBILITY
   =========================================== */

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

/* Focus Visible */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

/* ===========================================
   PRINT STYLES
   =========================================== */

@media print {
  .glass-sidebar,
  .nav-item,
  .btn,
  .modal-overlay,
  .toast,
  footer {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .glass-card,
  .card {
    border: 1px solid #000;
    box-shadow: none;
  }
}