/* Color Palette Variables */
:root {
  --primary-color: #1A1A2E;
  --secondary-color: #16213E;
  --tertiary-color: #0F3460;
  --accent-color: #E94560;
  --white-color: #FFFFFF;
  --light-gray: #F8F9FA;
  --dark-gray: #6C757D;
  --success-color: #28A745;
  --warning-color: #FFC107;
  --info-color: #17A2B8;
  --border-radius: 12px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-color: #1A1A2E;
  --card-bg: #16213E;
  --text-color: #FFFFFF;
  --text-muted: #B8B9BA;
  --border-color: #0F3460;
}

[data-theme="light"] {
  --bg-color: #FFFFFF;
  --card-bg: #FFFFFF;
  --text-color: #1A1A2E;
  --text-muted: #6C757D;
  --border-color: #DEE2E6;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: var(--transition);
  overflow-x: hidden;
}

/* Custom Bootstrap Overrides */
.bg-primary {
  background-color: var(--primary-color) !important;
}

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

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

/* Ensure proper color inheritance in dark mode */
[data-theme="dark"] .bg-primary {
  background-color: var(--primary-color) !important;
}

[data-theme="dark"] .bg-secondary {
  background-color: var(--secondary-color) !important;
}

[data-theme="dark"] .text-accent {
  color: var(--accent-color) !important;
}

.btn-accent {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.btn-accent:hover {
  background-color: #d63850;
  border-color: #d63850;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(233, 69, 96, 0.3);
}


/* Navigation */
.navbar {
  backdrop-filter: blur(10px);
  background-color: rgba(26, 26, 46, 0.95) !important;
  box-shadow: var(--box-shadow);
  padding: 1rem 0;
}

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

.nav-link {
  font-weight: 500;
  transition: var(--transition);
}

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

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--tertiary-color) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
  opacity: 0.3;
}

.hero-section .container {
  position: relative;
  z-index: 2;
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 8px 16px;
  border-radius: 25px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.feature-badge:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.feature-badge i {
  margin-right: 8px;
  font-size: 1.1rem;
}

/* Hero Animation */
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 400px;
}

.hero-logo {
  transition: transform 0.3s ease;
  animation: logoFloat 3s ease-in-out infinite;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.1));
}

.hero-logo:hover {
  transform: scale(1.05);
}

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

.solar-panel-animation {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: float 3s ease-in-out infinite;
}

.solar-panel-animation i {
  font-size: 8rem;
  color: var(--accent-color);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.solar-rays {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.3);
  animation: rotate 10s linear infinite;
}

.solar-rays::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: rotate 15s linear infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

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

/* Form Styles */
.form-step {
  display: none;
}

.form-step.active {
  display: block;
  animation: slideIn 0.3s ease-in-out;
}

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

.step-header h4 {
  color: var(--text-color);
  margin-bottom: 0.5rem;
}

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

.form-text {
  color: var(--text-muted);
}

.form-control, .form-select {
  border-radius: var(--border-radius);
  border: 2px solid #E9ECEF;
  padding: 12px 16px;
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus, .form-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 0.2rem rgba(233, 69, 96, 0.25);
}

.btn-check:checked + .btn {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

.btn-outline-primary:hover,
.btn-outline-success:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow);
}

/* Progress Bar */
.progress {
  border-radius: var(--border-radius);
  background-color: #E9ECEF;
}

.progress-bar {
  border-radius: var(--border-radius);
  transition: width 0.3s ease;
}

/* Cards */
.card {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
}

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-header {
  border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
  font-weight: 600;
}

/* Results Cards */
.result-card {
  text-align: center;
  padding: 2rem 1rem;
}

.result-card .display-4 {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.result-card .text-muted {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Charts */
canvas {
  max-height: 400px;
}

/* FAQ */
.accordion-button {
  font-weight: 600;
  background-color: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.accordion-button:not(.collapsed) {
  background-color: var(--accent-color);
  color: white;
}

.accordion-button:focus {
  box-shadow: 0 0 0 0.25rem rgba(233, 69, 96, 0.25);
}

.accordion-body {
  background-color: var(--card-bg);
  color: var(--text-color);
}

/* Offcanvas */
.offcanvas {
  background-color: var(--card-bg);
  color: var(--text-color);
}

.offcanvas-header {
  border-bottom: 1px solid var(--border-color);
}

/* Loading Spinner */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  color: white;
}

.spinner-border {
  width: 3rem;
  height: 3rem;
}

/* Dark Mode Styles */
[data-theme="dark"] {
  background-color: var(--bg-color);
  color: var(--text-color);
}

[data-theme="dark"] .card {
  background-color: var(--card-bg);
  border-color: var(--border-color);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: var(--card-bg);
  border-color: var(--border-color);
  color: var(--text-color);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  background-color: var(--card-bg);
  border-color: var(--accent-color);
  color: var(--text-color);
}

[data-theme="dark"] .btn-outline-primary,
[data-theme="dark"] .btn-outline-success,
[data-theme="dark"] .btn-outline-secondary {
  border-color: var(--border-color);
  color: var(--text-color);
}

[data-theme="dark"] .text-muted {
  color: var(--text-muted) !important;
}

/* Modal Dark Mode */
[data-theme="dark"] .modal-content {
  background-color: var(--card-bg);
  border-color: var(--border-color);
}

[data-theme="dark"] .modal-header {
  border-bottom-color: var(--border-color);
}

[data-theme="dark"] .modal-footer {
  border-top-color: var(--border-color);
}

[data-theme="dark"] .modal-title {
  color: var(--text-color);
}

[data-theme="dark"] .alert-info {
  background-color: rgba(23, 162, 184, 0.1);
  border-color: rgba(23, 162, 184, 0.3);
  color: var(--text-color);
}

[data-theme="dark"] .alert-info h6 {
  color: #17a2b8;
}

[data-theme="dark"] .text-primary {
  color: #4dabf7 !important;
}

[data-theme="dark"] .text-success {
  color: #69db7c !important;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero-section {
    padding: 2rem 0;
  }
  
  .hero-section .min-vh-100 {
    min-height: auto !important;
    padding: 4rem 0 2rem;
  }
  
  .display-4 {
    font-size: 2rem;
  }
  
  .display-5 {
    font-size: 1.75rem;
  }
  
  .solar-panel-animation i {
    font-size: 4rem;
  }
  
  .hero-image {
    height: 200px;
    margin-top: 2rem;
  }
  
  .feature-badge {
    font-size: 0.8rem;
    padding: 6px 12px;
  }
  
  .btn-lg {
    padding: 10px 20px;
    font-size: 1rem;
  }
  
  .card-body {
    padding: 1.5rem;
  }
  
  .result-card {
    padding: 1.5rem 1rem;
  }
  
  .result-card .display-4 {
    font-size: 1.5rem;
  }
  
  /* Improve form validation on mobile */
  .invalid-feedback {
    font-size: 0.875rem;
  }
  
  /* Better touch targets */
  .btn {
    min-height: 44px;
  }
  
  .form-control, .form-select {
    min-height: 44px;
  }
  
  /* Improve chart responsiveness */
  canvas {
    max-height: 300px;
  }
}

@media (max-width: 576px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  .hero-section .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  
  .btn-accent {
    width: 100%;
    margin-bottom: 1rem;
  }
  
  .d-flex.gap-3 {
    flex-direction: column;
    gap: 0.5rem !important;
  }
  
  .feature-badge {
    justify-content: center;
    margin-bottom: 0.5rem;
  }
}

/* Tablet Responsive */
@media (min-width: 769px) and (max-width: 1024px) {
  .hero-section .min-vh-100 {
    padding: 3rem 0;
  }
  
  .solar-panel-animation i {
    font-size: 6rem;
  }
  
  .hero-image {
    height: 300px;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .solar-panel-animation i {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
  }
}

/* Print Styles */
@media print {
  .navbar,
  .offcanvas,
  .modal,
  .loading-overlay,
  button {
    display: none !important;
  }
  
  .hero-section {
    background: white !important;
    color: black !important;
  }
  
  .card {
    box-shadow: none !important;
    border: 1px solid #ccc !important;
  }
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

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

.slide-up {
  animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.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;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn-accent {
    border-width: 3px;
  }
  
  .card {
    border-width: 2px;
  }
  
  .form-control, .form-select {
    border-width: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .solar-panel-animation {
    animation: none;
  }
  
  .solar-rays {
    animation: none;
  }
}

/* Utility Classes */
.text-shadow {
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.backdrop-blur {
  backdrop-filter: blur(10px);
}

.border-gradient {
  border: 2px solid;
  border-image: linear-gradient(45deg, var(--accent-color), var(--primary-color)) 1;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: #d63850;
}

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--accent-color) var(--light-gray);
}