/* ============================
   FUEL TRACKER — Modern Styles
   Date-based Odd/Even System
   ============================ */

:root {
  /* Dark Theme Colors */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  
  /* Accent Colors */
  --accent-blue: #3b82f6;
  --accent-blue-glow: rgba(59, 130, 246, 0.2);
  --accent-yellow: #eab308;
  --accent-yellow-glow: rgba(234, 179, 8, 0.2);
  --accent-red: #ef4444;
  --accent-red-glow: rgba(239, 68, 68, 0.2);
  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.2);
  
  /* Odd/Even Colors */
  --odd-color: #3b82f6;
  --odd-bg: rgba(59, 130, 246, 0.1);
  --even-color: #eab308;
  --even-bg: rgba(234, 179, 8, 0.1);
  
  /* Text Colors */
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  padding: var(--spacing-lg);
}

/* Language Switcher */
.lang-switcher {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  display: flex;
  gap: var(--spacing-xs);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  padding: var(--spacing-xs);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  z-index: 1000;
}

.lang-btn {
  background: transparent;
  border: none;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  font-size: 0.875rem;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.lang-btn.active {
  background: var(--accent-blue);
  color: white;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.hero-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  animation: float 3s ease-in-out infinite;
}

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

.hero h1 {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-yellow));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--spacing-sm);
}

.hero p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Glass Cards */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  padding: var(--spacing-lg);
  transition: var(--transition);
  box-shadow: var(--glass-shadow);
}

.glass-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
}

.card-title .icon {
  font-size: 1.5rem;
}

/* Today Banner */
.today-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  text-align: center;
}

.today-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.today-info .label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.today-info .value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition);
}

.badge-odd {
  background: var(--odd-bg);
  color: var(--odd-color);
  border: 1px solid var(--odd-color);
}

.badge-even {
  background: var(--even-bg);
  color: var(--even-color);
  border: 1px solid var(--even-color);
}

/* Input Groups */
.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
}

.plate-input-wrapper,
.date-picker-wrapper {
  position: relative;
}

.input-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.125rem;
  color: var(--text-muted);
  pointer-events: none;
}

.plate-input,
.date-picker {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) * 2.5);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
  font-family: monospace;
  font-weight: 500;
}

.plate-input:focus,
.date-picker:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.plate-input {
  text-transform: uppercase;
}

.date-picker {
  cursor: pointer;
}

.date-picker::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}

.date-day-hint {
  margin-top: var(--spacing-xs);
  font-size: 0.75rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  display: none;
}

.date-day-hint.visible {
  display: inline-block;
}

.date-day-hint.odd {
  background: var(--odd-bg);
  color: var(--odd-color);
}

.date-day-hint.even {
  background: var(--even-bg);
  color: var(--even-color);
}

/* Check Button */
.btn-check {
  width: 100%;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-yellow));
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-check::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-check:hover::before {
  left: 100%;
}

.btn-check:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

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

/* Result Panel */
.result-panel {
  margin-top: var(--spacing-lg);
  display: none;
  animation: slideUp 0.4s ease;
}

.result-panel.visible {
  display: block;
}

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

.result-content {
  background: rgba(0, 0, 0, 0.5);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
  border: 1px solid var(--glass-border);
}

.result-content.allowed {
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
}

.result-content.denied {
  border-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
}

.result-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.result-plate-display {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: monospace;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 1px;
}

.last-digit {
  display: inline-block;
  background: var(--accent-blue);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  margin: 0 0.125rem;
}

.result-status {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.result-status.allowed {
  color: var(--accent-green);
}

.result-status.denied {
  color: var(--accent-red);
}

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

/* Schedule Table */
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-md);
}

.schedule-table thead {
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 2px solid var(--glass-border);
}

.schedule-table th,
.schedule-table td {
  padding: var(--spacing-md);
  text-align: left;
}

.schedule-table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.schedule-table td {
  border-bottom: 1px solid var(--glass-border);
}

.schedule-table tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

.today-row {
  background: var(--odd-bg);
  position: relative;
}

.today-row td:first-child {
  font-weight: 600;
  color: var(--accent-blue);
}

.day-type-odd {
  color: var(--odd-color);
  font-weight: 500;
}

.day-type-even {
  color: var(--even-color);
  font-weight: 500;
}

.plates-allowed {
  font-family: monospace;
  font-weight: 500;
}

/* History Section */
.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.btn-clear {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid var(--accent-red);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--accent-red);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  transition: var(--transition);
}

.btn-clear:hover {
  background: rgba(239, 68, 68, 0.3);
  transform: scale(1.05);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 400px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-md);
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.history-item:hover {
  transform: translateX(5px);
  background: rgba(0, 0, 0, 0.5);
}

.history-status-icon {
  font-size: 1.5rem;
}

.history-info {
  flex: 1;
}

.history-plate {
  font-weight: 600;
  font-family: monospace;
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.history-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-result {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
}

.history-result.allowed {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
}

.history-result.denied {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
}

.history-empty {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

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

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

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Animations */
@keyframes resultBounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-md);
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .hero p {
    font-size: 0.875rem;
  }
  
  .glass-card {
    padding: var(--spacing-md);
  }
  
  .today-banner {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .schedule-table th,
  .schedule-table td {
    padding: var(--spacing-sm);
    font-size: 0.75rem;
  }
  
  .history-item {
    flex-wrap: wrap;
  }
  
  .history-result {
    width: 100%;
    text-align: center;
  }
  
  .lang-switcher {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
  }
  
  .lang-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .schedule-table {
    font-size: 0.7rem;
  }
  
  .schedule-table th,
  .schedule-table td {
    padding: var(--spacing-xs);
  }
  
  .result-plate-display {
    font-size: 1rem;
  }
}