/* Swiss Style (International Typographic Style) Implementation */
/* Color Palette: #05386B, #379683, #5CDB95, #8EE4AF, #EDF5E1 */

:root {
  /* Color Palette */
  --primary-dark: #05386B;
  --primary-medium: #379683;
  --primary-light: #5CDB95;
  --accent-light: #8EE4AF;
  --background-light: #EDF5E1;
  
  /* Typography */
  --font-primary: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bs-body-bg: #1a1a1a;
  --bs-body-color: #e9ecef;
  --bs-primary: #5CDB95;
  --bs-secondary: #8EE4AF;
  --bs-light: #343a40;
  --bs-dark: #f8f9fa;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  scroll-behavior: smooth;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.025em;
  margin-bottom: var(--spacing-md);
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.05em;
}

p {
  margin-bottom: var(--spacing-md);
}

.lead {
  font-weight: var(--font-weight-medium);
  letter-spacing: -0.015em;
}

/* Custom Bootstrap Theme */
.btn-primary {
  background-color: var(--primary-medium);
  border-color: var(--primary-medium);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.025em;
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline-primary {
  color: var(--primary-medium);
  border-color: var(--primary-medium);
  font-weight: var(--font-weight-medium);
}

.btn-outline-primary:hover {
  background-color: var(--primary-medium);
  border-color: var(--primary-medium);
}

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

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

.text-success {
  color: var(--primary-light) !important;
}

.bg-success {
  background-color: var(--primary-light) !important;
}

/* Navigation */
.navbar {
  background-color: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background-color: rgba(26, 26, 26, 0.95) !important;
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.navbar-brand {
  font-weight: var(--font-weight-bold);
  font-size: 1.5rem;
  letter-spacing: -0.025em;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-medium) !important;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--background-light) 0%, rgba(92, 219, 149, 0.1) 100%);
  min-height: 100vh;
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .hero-section {
  background: linear-gradient(135deg, #1a1a1a 0%, rgba(92, 219, 149, 0.05) 100%);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(92, 219, 149, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(55, 150, 131, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-graphic {
  position: relative;
  padding: var(--spacing-xxl);
}

.hero-graphic i {
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

.hero-graphic i:nth-child(2n) {
  animation-delay: -1s;
}

.hero-graphic i:nth-child(3n) {
  animation-delay: -2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* Cards */
.card {
  border: none;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

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

[data-theme="dark"] .card {
  background-color: #2d3748;
  color: #e2e8f0;
}

.card-header {
  border-bottom: none;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.025em;
  padding: var(--spacing-lg);
}

.card-body {
  padding: var(--spacing-lg);
}

/* Forms */
.form-control, .form-select {
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-medium);
  box-shadow: 0 0 0 0.2rem rgba(55, 150, 131, 0.25);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: #2d3748;
  border-color: #4a5568;
  color: #e2e8f0;
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  background-color: #2d3748;
  border-color: var(--primary-light);
  color: #e2e8f0;
}

.form-label {
  font-weight: var(--font-weight-medium);
  color: var(--primary-dark);
  margin-bottom: var(--spacing-sm);
}

[data-theme="dark"] .form-label {
  color: var(--accent-light);
}

.form-text {
  font-size: 0.875rem;
  color: #6c757d;
  font-weight: var(--font-weight-normal);
}

/* Results Display */
.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background-color: var(--background-light);
  border-radius: 8px;
  border-left: 4px solid var(--primary-medium);
  transition: all var(--transition-fast);
}

[data-theme="dark"] .result-item {
  background-color: #2d3748;
  border-left-color: var(--primary-light);
}

.result-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.result-label {
  font-weight: var(--font-weight-medium);
  color: var(--primary-dark);
}

[data-theme="dark"] .result-label {
  color: var(--accent-light);
}

.result-value {
  font-weight: var(--font-weight-bold);
  font-size: 1.125rem;
  color: var(--primary-medium);
}

[data-theme="dark"] .result-value {
  color: var(--primary-light);
}

.result-savings {
  color: var(--primary-light);
}

.result-emission {
  color: #28a745;
}

/* Charts Container */
#chartsCard canvas {
  max-width: 100%;
  height: auto;
}

/* Accordion */
.accordion-item {
  border: none;
  margin-bottom: var(--spacing-sm);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .accordion-item {
  background-color: #2d3748;
}

.accordion-button {
  font-weight: var(--font-weight-medium);
  border: none;
  padding: var(--spacing-lg);
  background-color: white;
}

[data-theme="dark"] .accordion-button {
  background-color: #2d3748;
  color: #e2e8f0;
}

.accordion-button:not(.collapsed) {
  background-color: var(--background-light);
  color: var(--primary-dark);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
  background-color: #4a5568;
  color: var(--primary-light);
}

.accordion-button:focus {
  box-shadow: 0 0 0 0.2rem rgba(55, 150, 131, 0.25);
}

.accordion-body {
  padding: var(--spacing-lg);
  background-color: white;
}

[data-theme="dark"] .accordion-body {
  background-color: #2d3748;
  color: #e2e8f0;
}

/* Modal */
.modal-content {
  border: none;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .modal-content {
  background-color: #2d3748;
  color: #e2e8f0;
}

.modal-header {
  border-bottom: none;
  padding: var(--spacing-xl);
}

.modal-body {
  padding: var(--spacing-xl);
}

/* Offcanvas */
.offcanvas {
  border: none;
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .offcanvas {
  background-color: #2d3748;
  color: #e2e8f0;
}

.offcanvas-header {
  border-bottom: none;
  padding: var(--spacing-xl);
}

.offcanvas-body {
  padding: var(--spacing-xl);
}

/* List Group */
.list-group-item {
  border: none;
  border-radius: 8px !important;
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-fast);
}

.list-group-item:hover {
  background-color: var(--background-light);
  transform: translateX(4px);
}

[data-theme="dark"] .list-group-item {
  background-color: #4a5568;
  color: #e2e8f0;
}

[data-theme="dark"] .list-group-item:hover {
  background-color: #2d3748;
}

/* Alerts */
.alert {
  border: none;
  border-radius: 8px;
  font-weight: var(--font-weight-medium);
}

.alert-info {
  background-color: rgba(92, 219, 149, 0.1);
  color: var(--primary-dark);
  border-left: 4px solid var(--primary-light);
}

.alert-success {
  background-color: rgba(55, 150, 131, 0.1);
  color: var(--primary-dark);
  border-left: 4px solid var(--primary-medium);
}

[data-theme="dark"] .alert-info,
[data-theme="dark"] .alert-success {
  background-color: rgba(92, 219, 149, 0.05);
  color: var(--accent-light);
}

/* Dark Mode Toggle */
#darkModeToggle {
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

#darkModeToggle:hover {
  transform: rotate(15deg);
}

/* Footer */
footer {
  background-color: var(--primary-dark) !important;
  margin-top: var(--spacing-xxl);
}

footer a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

footer a:hover {
  color: var(--primary-light);
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--primary-medium);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section {
    text-align: center;
  }
  
  .hero-graphic {
    padding: var(--spacing-lg);
  }
  
  .display-4 {
    font-size: 2rem;
  }
  
  .card-body {
    padding: var(--spacing-md);
  }
  
  .modal-body,
  .offcanvas-body {
    padding: var(--spacing-lg);
  }
  
  .result-item {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 576px) {
  .btn-lg {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
  }
  
  .display-4 {
    font-size: 1.75rem;
  }
  
  .hero-section {
    padding-top: 80px;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .btn,
  .offcanvas,
  .modal,
  footer {
    display: none !important;
  }
  
  .hero-section {
    background: white !important;
  }
  
  .card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .btn-primary {
    background-color: #000;
    border-color: #000;
    color: #fff;
  }
  
  .text-primary {
    color: #000 !important;
  }
  
  .form-control:focus,
  .form-select:focus {
    border-color: #000;
    box-shadow: 0 0 0 0.2rem rgba(0, 0, 0, 0.25);
  }
}

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

/* Focus Visible */
.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible {
  outline: 2px solid var(--primary-medium);
  outline-offset: 2px;
}

/* Utility Classes */
.text-gradient {
  background: linear-gradient(135deg, var(--primary-medium), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-effect {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .glass-effect {
  background: rgba(0, 0, 0, 0.1);
  border-color: rgba(255, 255, 255, 0.1);
}

.hover-lift {
  transition: transform var(--transition-fast);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--background-light);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-medium);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
  background: #2d3748;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--primary-light);
}