/* Modern CSS Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Modern Color Palette */
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Neutral Colors */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--gray-100);
  background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #0a0a0a 100%);
  overflow: hidden;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: white;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--gray-600);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-6);
}

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

.loading-content h2 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.loading-content p {
  color: var(--gray-300);
  font-size: var(--font-size-sm);
}

/* Map Container */
#map {
  height: 100vh;
  width: 100%;
  position: relative;
  background: transparent;
}

/* Control Panel */
.control-panel {
  position: absolute;
  top: var(--space-6);
  left: var(--space-6);
  width: 320px;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  padding: var(--space-6);
  z-index: 1000;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-normal);
}

.control-panel:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.panel-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-100);
  margin-bottom: var(--space-1);
}

.panel-header p {
  color: var(--gray-400);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* Sections */
.section {
  margin-bottom: var(--space-6);
}

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

.section h3 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--gray-300);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Upload Group */
.upload-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.file-input-wrapper {
  position: relative;
}

.file-input-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-300);
}

.file-input-label:hover {
  border-color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  transform: translateY(-1px);
}

.file-input-label svg {
  flex-shrink: 0;
}

/* Control Groups */
.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.control-item label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-300);
}

/* Modern Select */
.modern-select {
  padding: var(--space-3) var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
  font-size: var(--font-size-sm);
  color: var(--gray-200);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.modern-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.modern-select:hover {
  border-color: rgba(255, 255, 255, 0.3);
}

/* Modern Slider */
.modern-slider {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modern-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.modern-slider::-webkit-slider-thumb:hover {
  background: var(--primary-dark);
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.modern-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.modern-slider::-moz-range-thumb:hover {
  background: var(--primary-dark);
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* Button Styles */
.button-group {
  display: flex;
  gap: var(--space-3);
}

.btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 44px;
}

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

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

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--gray-200);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Status Bar */
.status-bar {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  border: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 300px;
}

.status-content {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--gray-200);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s infinite;
}

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

/* Legend */
.legend {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  border: 1px solid rgba(255, 255, 255, 0.1);
  min-width: 280px;
  margin-top: 80px; /* Add space below status bar */
}

.legend-header h3 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--gray-300);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.legend-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.legend-color {
  width: 24px;
  height: 16px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.legend-item span {
  font-size: var(--font-size-sm);
  color: var(--gray-300);
  font-weight: 500;
}

.legend-footer {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.legend-footer small {
  color: var(--gray-400);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--gray-200);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: var(--space-2);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  width: 0%;
  transition: width var(--transition-normal);
  border-radius: var(--radius-sm);
}

/* GeoTIFF Overlay Styling */
.geotiff-overlay {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
}

/* Responsive Design */
@media (max-width: 768px) {
  .control-panel {
    width: calc(100% - var(--space-12));
    left: var(--space-6);
    right: var(--space-6);
  }
  
  .legend {
    top: auto;
    bottom: var(--space-6);
    right: var(--space-6);
    left: var(--space-6);
    width: calc(100% - var(--space-12));
    margin-top: 0;
  }
  
  .status-bar {
    right: var(--space-6);
    left: var(--space-6);
    width: calc(100% - var(--space-12));
  }
}

@media (max-width: 480px) {
  .control-panel {
    padding: var(--space-4);
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .btn {
    justify-content: center;
  }
}

/* Leaflet Overrides */
.leaflet-control-container .leaflet-top.leaflet-left {
  top: 120px;
  left: 20px;
}

.leaflet-control-container .leaflet-top.leaflet-right {
  top: 20px;
  right: 20px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Animation utilities */
.fade-in {
  animation: fadeIn var(--transition-normal) ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.slide-in {
  animation: slideIn var(--transition-normal) ease-out;
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

/* Home Button - Bottom Right */
.home-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
}

.home-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(20px);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  text-decoration: none;
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: all 0.3s ease;
}

.home-link:hover {
  background: rgba(0, 0, 0, 0.5);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
  color: white;
}

.home-link svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

.home-link:hover svg {
  transform: scale(1.1);
}