/* DívidaSmart - Modern CSS Styles */

:root {
  /* Color Palette */
  --primary-color: #05386B;
  --secondary-color: #379683;
  --accent-color: #5CDB95;
  --light-accent: #8EE4AF;
  --background-light: #EDF5E1;
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, #05386B 0%, #379683 100%);
  --secondary-gradient: linear-gradient(135deg, #379683 0%, #5CDB95 100%);
  --success-gradient: linear-gradient(135deg, #5CDB95 0%, #8EE4AF 100%);
  --info-gradient: linear-gradient(135deg, #379683 0%, #8EE4AF 100%);
  --warning-gradient: linear-gradient(135deg, #8EE4AF 0%, #EDF5E1 100%);
  
  /* Dark Mode Colors */
  --dark-bg: #1a1a1a;
  --dark-card: #2d2d2d;
  --dark-text: #e0e0e0;
  --dark-border: #404040;
  
  /* Spacing */
  --header-height: 76px;
  --footer-height: 80px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--primary-color);
  background: linear-gradient(135deg, var(--background-light) 0%, #ffffff 100%);
  min-height: 100vh;
  padding-top: var(--header-height);
  transition: all var(--transition-normal);
}

/* Dark Mode */
body.dark-mode {
  background: linear-gradient(135deg, var(--dark-bg) 0%, #2d2d2d 100%);
  color: var(--dark-text);
}

body.dark-mode .card {
  background-color: var(--dark-card);
  border-color: var(--dark-border);
  color: var(--dark-text);
}

body.dark-mode .form-control,
body.dark-mode .form-select {
  background-color: var(--dark-card);
  border-color: var(--dark-border);
  color: var(--dark-text);
}

body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus {
  background-color: var(--dark-card);
  border-color: var(--accent-color);
  color: var(--dark-text);
  box-shadow: 0 0 0 0.25rem rgba(92, 219, 149, 0.25);
}

/* Header and Navigation */
.navbar {
  background: var(--primary-gradient) !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1030;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Gradient Backgrounds */
.bg-primary-gradient {
  background: var(--primary-gradient) !important;
}

.bg-secondary-gradient {
  background: var(--secondary-gradient) !important;
}

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

.bg-info-gradient {
  background: var(--info-gradient) !important;
}

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

/* Main Content */
.main-content {
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
  padding: 2rem 0;
}

/* Sections */
.section {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.section.active {
  display: block;
}

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

/* Cards */
.card {
  border: none;
  border-radius: 15px;
  overflow: hidden;
  transition: all var(--transition-normal);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
}

.card-header {
  border-bottom: none;
  padding: 1.5rem;
}

.card-body {
  padding: 2rem;
}

/* Forms */
.form-control,
.form-select {
  border-radius: 10px;
  border: 2px solid #e9ecef;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 0.25rem rgba(92, 219, 149, 0.25);
}

.form-label {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

body.dark-mode .form-label {
  color: var(--dark-text);
}

/* Buttons */
.btn {
  border-radius: 10px;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  transition: all var(--transition-fast);
  border: none;
}

.btn-primary {
  background: var(--primary-gradient);
  border: none;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #043a5f 0%, #2d7a6b 100%);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(5, 56, 107, 0.4);
}

.btn-success {
  background: var(--success-gradient);
  color: var(--primary-color);
  border: none;
}

.btn-success:hover {
  background: linear-gradient(135deg, #4bc47a 0%, #7dd9a3 100%);
  color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(92, 219, 149, 0.4);
}

.btn-info {
  background: var(--info-gradient);
  border: none;
}

.btn-info:hover {
  background: linear-gradient(135deg, #2d7a6b 0%, #7dd9a3 100%);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(55, 150, 131, 0.4);
}

/* Offcanvas */
.offcanvas {
  width: 300px;
}

.offcanvas .nav-link {
  color: var(--primary-color);
  padding: 1rem;
  border-radius: 10px;
  margin-bottom: 0.5rem;
  transition: all var(--transition-fast);
}

.offcanvas .nav-link:hover {
  background-color: var(--background-light);
  color: var(--primary-color);
  transform: translateX(10px);
}

.offcanvas .nav-link.active {
  background: var(--secondary-gradient);
  color: white;
}

body.dark-mode .offcanvas {
  background-color: var(--dark-card);
}

body.dark-mode .offcanvas .nav-link {
  color: var(--dark-text);
}

body.dark-mode .offcanvas .nav-link:hover {
  background-color: var(--dark-bg);
  color: var(--accent-color);
}

/* Results Display */
.results-card {
  background: var(--success-gradient);
  color: var(--primary-color);
  border-radius: 15px;
  padding: 2rem;
  margin-bottom: 1rem;
  text-align: center;
  transition: all var(--transition-normal);
}

.results-card:hover {
  transform: scale(1.02);
}

.result-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.result-label {
  font-size: 1.1rem;
  font-weight: 500;
  opacity: 0.9;
}

/* Chart Container */
#chartContainer {
  transition: all var(--transition-normal);
}

/* Saved Simulations */
.simulation-item {
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid var(--light-accent);
  border-radius: 15px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all var(--transition-fast);
}

.simulation-item:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(92, 219, 149, 0.2);
}

body.dark-mode .simulation-item {
  background: var(--dark-card);
  border-color: var(--dark-border);
  color: var(--dark-text);
}

body.dark-mode .simulation-item:hover {
  border-color: var(--accent-color);
}

.simulation-title {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

body.dark-mode .simulation-title {
  color: var(--accent-color);
}

.simulation-details {
  font-size: 0.9rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

body.dark-mode .simulation-details {
  color: var(--light-accent);
}

/* Alerts and Modals */
.modal-content {
  border-radius: 15px;
  border: none;
  overflow: hidden;
}

.modal-header {
  border-bottom: none;
}

.modal-footer {
  border-top: none;
}

/* Payment Plan Table */
.payment-table {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.payment-table th {
  background: var(--primary-gradient);
  color: white;
  font-weight: 600;
  padding: 1rem;
  border: none;
}

.payment-table td {
  padding: 1rem;
  border-color: var(--light-accent);
  vertical-align: middle;
}

body.dark-mode .payment-table {
  background: var(--dark-card);
}

body.dark-mode .payment-table td {
  border-color: var(--dark-border);
  color: var(--dark-text);
}

/* Footer */
.footer {
  background: var(--primary-gradient) !important;
  margin-top: auto;
}

.footer a {
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer a:hover {
  color: var(--accent-color) !important;
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

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

/* Comparison Cards */
.comparison-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(237, 245, 225, 0.9) 100%);
  border: 2px solid var(--light-accent);
  border-radius: 15px;
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition-normal);
  height: 100%;
}

.comparison-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(92, 219, 149, 0.2);
  border-color: var(--accent-color);
}

body.dark-mode .comparison-card {
  background: linear-gradient(135deg, var(--dark-card) 0%, #3a3a3a 100%);
  border-color: var(--dark-border);
}

.comparison-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

body.dark-mode .comparison-title {
  color: var(--accent-color);
}

.comparison-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

body.dark-mode .comparison-value {
  color: var(--light-accent);
}

.comparison-difference {
  font-size: 1rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  display: inline-block;
}

.difference-positive {
  background-color: rgba(220, 53, 69, 0.1);
  color: #dc3545;
}

.difference-negative {
  background-color: rgba(25, 135, 84, 0.1);
  color: #198754;
}

/* Responsive Design */
@media (max-width: 768px) {
  .main-content {
    padding: 1rem 0;
  }
  
  .card-body {
    padding: 1.5rem;
  }
  
  .result-value {
    font-size: 1.5rem;
  }
  
  .navbar-brand {
    font-size: 1.2rem;
  }
  
  .offcanvas {
    width: 280px;
  }
}

@media (max-width: 576px) {
  .card-body {
    padding: 1rem;
  }
  
  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
  
  .result-value {
    font-size: 1.3rem;
  }
  
  .comparison-value {
    font-size: 1.5rem;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .offcanvas,
  .footer,
  .btn,
  .modal {
    display: none !important;
  }
  
  .main-content {
    padding-top: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  body {
    background: white;
    color: black;
  }
}

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

/* Focus Styles */
.btn:focus,
.form-control:focus,
.form-select:focus,
.nav-link:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #000000;
    --secondary-color: #000000;
    --accent-color: #0066cc;
    --background-light: #ffffff;
  }
  
  .card {
    border: 2px solid #000000;
  }
  
  .btn {
    border: 2px solid #000000;
  }
}

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