/* ==============================================================================
   ENERGY MONITOR PRO - STYLESHEET
   Modern, responsive design with smooth animations and accessibility
   ============================================================================== */

/* CSS Custom Properties */
:root {
  /* Color Palette */
  --primary: #9E7FFF;
  --secondary: #38bdf8;
  --accent: #f472b6;
  --background: #171717;
  --surface: #262626;
  --text: #FFFFFF;
  --text-secondary: #A3A3A3;
  --border: #2F2F2F;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Efficiency Colors */
  --efficient: #10b981;
  --moderate: #f59e0b;
  --high-consumption: #ef4444;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 32px rgba(158, 127, 255, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Background Elements */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(158, 127, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(158, 127, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -2;
}

.bg-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 20%, rgba(158, 127, 255, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(56, 189, 248, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 40% 60%, rgba(244, 114, 182, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Screen Reader Only */
.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;
}

/* Header */
.header {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(23, 23, 23, 0.8);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.logo-text h1 {
  font-family: 'Playfair Display', serif;
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: -4px;
}

.logo-text p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
}

.header-stats {
  display: flex;
  gap: var(--spacing-lg);
}

.stat-item {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Main Content */
.main {
  padding: var(--spacing-2xl) 0;
  min-height: calc(100vh - 200px);
}

/* Search Section */
.search-section {
  margin-bottom: var(--spacing-2xl);
}

.search-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.search-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.search-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.search-header h2 {
  font-family: 'Playfair Display', serif;
  font-size: 2.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--text), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.search-header p {
  color: var(--text-secondary);
  font-size: 1.125rem;
}

/* Search Form */
.search-form {
  max-width: 600px;
  margin: 0 auto;
}

.input-group {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.input-wrapper {
  flex: 1;
  position: relative;
}

.input-wrapper input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;
  background: var(--background);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 1rem;
  transition: var(--transition-normal);
}

.input-wrapper input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(158, 127, 255, 0.1);
}

.input-wrapper input:invalid {
  border-color: var(--error);
}

.input-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  pointer-events: none;
}

.search-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-width: 160px;
}

.search-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.search-btn:active {
  transform: translateY(0);
}

.search-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-text {
  transition: var(--transition-fast);
}

.btn-loader {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  opacity: 0;
  transition: var(--transition-fast);
}

.search-btn.loading .btn-text {
  opacity: 0;
}

.search-btn.loading .btn-loader {
  opacity: 1;
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.input-help {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: var(--spacing-sm);
}

.input-error {
  color: var(--error);
  font-size: 0.875rem;
  text-align: center;
  margin-top: var(--spacing-xs);
  opacity: 0;
  transition: var(--transition-normal);
}

.input-error.show {
  opacity: 1;
}

/* Results Section */
.results-section {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition-slow);
}

.results-section.show {
  opacity: 1;
  transform: translateY(0);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.result-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.result-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

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

.card-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

/* Efficiency Badge */
.efficiency-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

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

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

/* Energy Display */
.energy-display {
  text-align: center;
}

.energy-value {
  margin-bottom: var(--spacing-lg);
}

.energy-value .value {
  display: block;
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.energy-value .unit {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.energy-breakdown {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.breakdown-item {
  flex: 1;
  padding: var(--spacing-md);
  background: var(--background);
  border-radius: var(--radius-md);
  text-align: center;
}

.breakdown-item .label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.breakdown-item .value {
  font-weight: 600;
  color: var(--text);
}

/* Gauge Container */
.gauge-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.gauge-label {
  position: absolute;
  text-align: center;
}

.gauge-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.gauge-unit {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Chart Container */
.chart-container {
  height: 300px;
  position: relative;
}

/* Info Content */
.info-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm);
  background: var(--background);
  border-radius: var(--radius-sm);
}

.info-label {
  font-weight: 500;
  color: var(--text-secondary);
}

.info-value {
  font-weight: 600;
  color: var(--text);
}

/* Error Section */
.error-section {
  display: none;
  text-align: center;
  padding: var(--spacing-2xl);
}

.error-section.show {
  display: block;
}

.error-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--error);
  max-width: 500px;
  margin: 0 auto;
}

.error-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  color: var(--error);
}

.error-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--error);
}

.error-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.retry-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--error);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
}

.retry-btn:hover {
  background: #dc2626;
  transform: translateY(-2px);
}

/* Footer */
.footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .header-stats {
    gap: var(--spacing-md);
  }
  
  .search-header h2 {
    font-size: 2rem;
  }
  
  .input-group {
    flex-direction: column;
  }
  
  .search-btn {
    width: 100%;
  }
  
  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .energy-breakdown {
    flex-direction: column;
  }
  
  .energy-value .value {
    font-size: 2.5rem;
  }
}

@media (max-width: 480px) {
  .search-card {
    padding: var(--spacing-lg);
  }
  
  .result-card {
    padding: var(--spacing-md);
  }
  
  .energy-value .value {
    font-size: 2rem;
  }
  
  .logo-text h1 {
    font-size: 1.5rem;
  }
}

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

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

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

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

/* Focus Styles for Accessibility */
button:focus,
input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border: #555555;
    --text-secondary: #CCCCCC;
  }
}

/* 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;
  }
}