:root {
  --primary-color: #5333a3;
  --primary-dark: #3d2477;
  --primary-light: #6d4bc4;
  --accent-color: #17ba5e;
  --accent-hover: #14a352;
  --error-color: #e74c3c;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  --crypto-color: #f7931a;
  --metal-color: #ffd700;
  --special-color: #9b59b6;
  
  --bg-primary: #903769;
  --bg-secondary: rgba(83, 51, 163, 0.95);
  --bg-input: #ffffff;
  --text-primary: #ffffff;
  --text-secondary: #e0e0e0;
  --text-dark: #333333;
  --border-color: #b8b4b4;
  --border-focus: #17ba5e;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(23, 186, 94, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.2);
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 10px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-image: url('background.png');
  background-size: cover;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-color: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: var(--spacing-md);
  color: var(--text-primary);
  line-height: 1.6;
}

.converter-container {
  background: var(--bg-secondary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 700px;
  padding: var(--spacing-xl);
  animation: fadeInUp 0.5s ease;
  position: relative;
  overflow: hidden;
}

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

.converter-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  padding-bottom: var(--spacing-md);
}

.converter-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.converter-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.status-indicator {
  font-size: 0.8rem;
  animation: pulse 2s infinite;
  color: var(--success-color);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-indicator.offline {
  color: var(--error-color);
  animation: none;
}

.converter-form {
  margin-bottom: var(--spacing-lg);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.currency-selector {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--spacing-md);
  align-items: end;
  width: 100%;
}

.currency-input-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 0;
}

.currency-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.currency-select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background-color: var(--bg-input);
  color: var(--text-dark);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: 500;
  max-height: 300px;
  overflow-y: auto;
}

.currency-select:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.currency-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(23, 186, 94, 0.2);
}

/* Style for different currency types */
.currency-select option.currency-crypto {
  color: var(--crypto-color);
  font-weight: 600;
}

.currency-select option.currency-metal {
  color: var(--metal-color);
  font-weight: 600;
}

.currency-select option.currency-special {
  color: var(--special-color);
  font-weight: 600;
}

.currency-select::-webkit-scrollbar {
  width: 8px;
}

.currency-select::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}

.currency-select::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

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

.switch-btn {
  padding: var(--spacing-sm);
  background-color: #6c757d;
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.5rem;
  width: 45px;
  height: 45px;
  min-width: 45px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  align-self: end;
  margin-bottom: 2px;
}

.switch-btn:hover {
  background-color: #5a6268;
  transform: rotate(180deg);
  box-shadow: var(--shadow-md);
}

.switch-btn:active {
  transform: rotate(180deg) scale(0.95);
}

.switch-icon {
  display: inline-block;
  transition: transform var(--transition-normal);
}

.amount-input-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.amount-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.amount-input {
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  background-color: var(--bg-input);
  color: var(--text-dark);
  transition: all var(--transition-normal);
  font-weight: 500;
}

.amount-input:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.amount-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(23, 186, 94, 0.2);
}

.amount-input::placeholder {
  color: #999;
  font-weight: 400;
}

.amount-input::-webkit-inner-spin-button,
.amount-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  appearance: none;
  margin: 0;
}

.amount-input[type=number] {
  -moz-appearance: textfield;
  appearance: textfield;
}

.convert-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, #020c17 0%, #1a3a5c 100%);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

.convert-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.convert-btn:hover::before {
  width: 300px;
  height: 300px;
}

.convert-btn:hover {
  background: linear-gradient(135deg, #0056b3 0%, #2a5a8c 100%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

.convert-btn:disabled {
  background: #6c757d;
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-text, .btn-loading {
  position: relative;
  z-index: 1;
}

.result-display {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent-color);
  min-height: 100px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  transition: all var(--transition-normal);
}

.result-display:empty {
  display: none;
}

.result-main {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.result-main strong {
  color: var(--accent-color);
  font-size: 1.5rem;
  font-weight: 700;
}

.result-source {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
  opacity: 0.8;
  line-height: 1.4;
}

.loading {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.error-message {
  color: var(--error-color);
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid var(--error-color);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
  text-align: center;
  font-weight: 500;
  animation: shake 0.5s ease;
}

.error-message:empty {
  display: none;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.features-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.section-title {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.stats-section {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-normal);
}

.stat-item:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.1);
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: var(--spacing-xs);
}

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

.history-section {
  margin-bottom: 0;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 200px;
  overflow-y: auto;
  padding: var(--spacing-sm);
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.history-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(4px);
}

.clear-history-btn {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(231, 76, 60, 0.2);
  color: var(--error-color);
  border: 1px solid var(--error-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition-normal);
  width: 100%;
}

.clear-history-btn:hover {
  background: var(--error-color);
  color: white;
}

.popular-pairs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-sm);
}

.pair-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-normal);
  white-space: nowrap;
  text-align: center;
}

.pair-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

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

.converter-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.keyboard-shortcuts {
  margin-bottom: var(--spacing-sm);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.shortcut-hint {
  display: inline-block;
}

kbd {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 0.75rem;
  font-family: monospace;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.api-attribution {
  font-size: 0.7rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(83, 51, 163, 0.95);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  z-index: 1000;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 5px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-overlay p {
  font-size: 1.1rem;
  color: var(--text-primary);
  text-align: center;
}

#currencyCounter {
  background: rgba(23, 186, 94, 0.2);
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 600;
  color: var(--accent-color);
  border: 1px solid rgba(23, 186, 94, 0.3);
}

.chart-section {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  animation: slideIn 0.4s ease;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.chart-controls {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.chart-timeframe-select {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-dark);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.chart-timeframe-select:hover {
  background: #fff;
  border-color: var(--accent-color);
}

.chart-timeframe-select:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(23, 186, 94, 0.1);
}

.refresh-chart-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent-color);
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
}

.refresh-chart-btn:hover {
  background: var(--accent-hover);
  transform: rotate(180deg);
}

.refresh-chart-btn:active {
  transform: scale(0.95) rotate(180deg);
}

.chart-container {
  position: relative;
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  min-height: 300px;
}

.chart-container canvas {
  max-height: 300px;
  width: 100% !important;
  height: 300px !important;
}

.chart-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-sm);
  font-size: 0.85rem;
}

.chart-info-item {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  text-align: center;
}

.chart-info-label {
  opacity: 0.8;
  font-size: 0.75rem;
  display: block;
  margin-bottom: 0.25rem;
}

.chart-info-value {
  font-weight: 600;
  font-size: 1rem;
  color: var(--accent-color);
}

.chart-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--text-secondary);
}

.chart-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--spacing-md);
}

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

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  body {
    padding: var(--spacing-sm);
  }
  
  .converter-container {
    padding: var(--spacing-md);
    max-width: 95%;
  }
  
  .converter-title {
    font-size: 1.5rem;
  }
  
  .currency-selector {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .currency-input-wrapper {
    width: 100%;
  }
  
  .switch-btn {
    width: 100%;
    height: 40px;
    order: 3;
    margin-top: var(--spacing-sm);
  }
  
  .switch-btn:hover {
    transform: rotate(90deg);
  }
  
  .popular-pairs {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .keyboard-shortcuts {
    font-size: 0.7rem;
  }
}

@media (max-width: 480px) {
  .converter-title {
    font-size: 1.3rem;
  }
  
  .result-main {
    font-size: 1.1rem;
  }
  
  .result-main strong {
    font-size: 1.3rem;
  }
  
  .popular-pairs {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .keyboard-shortcuts {
    display: none;
  }
  
  .api-attribution {
    font-size: 0.65rem;
  }
}

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

*:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

@media print {
  body {
    background: white;
    color: black;
  }
  
  .converter-container {
    box-shadow: none;
    background: white;
    color: black;
  }
  
  .features-section,
  .converter-footer,
  button,
  .loading-overlay {
    display: none;
  }
  
  .result-display {
    background: white;
    color: black;
    border: 1px solid #ccc;
  }
}