/* Professional Currency Converter - Glassmorphism Design System */

/* Import modern fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables for Design System */
:root {
  /* Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #8b5cf6;
  --secondary-dark: #7c3aed;
  --accent: #ec4899;
  --accent-dark: #db2777;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Glass Colors */
  --glass-bg: rgba(255, 255, 255, 0.9);
  --glass-border: rgba(99, 102, 241, 0.4);
  --glass-shadow: 0 4px 16px rgba(31, 38, 135, 0.2);
  --glass-backdrop: blur(10px);
  --glass-border-radius: 12px;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing System (8px base unit) */
  --space-1: 0.5rem;  /* 8px */
  --space-2: 1rem;    /* 16px */
  --space-3: 1.5rem;  /* 24px */
  --space-4: 2rem;    /* 32px */
  --space-5: 2.5rem;  /* 40px */
  --space-6: 3rem;    /* 48px */
  --space-7: 3.5rem;  /* 56px */
  --space-8: 4rem;    /* 64px */

  /* Typography Scale */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */

  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* Animation Durations */
  --transition-fast: 0.15s;
  --transition-normal: 0.3s;
  --transition-slow: 0.5s;

  /* Z-index */
  --z-dropdown: 1000;
  --z-modal: 1050;
  --z-loading: 2000;
}

/* Light Theme Variables */
:root {
  --text-primary: #1f2937;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  --bg-primary: rgba(255, 255, 255, 0.95);
  --bg-secondary: rgba(243, 244, 246, 0.95);
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --glass-bg: rgba(31, 41, 55, 0.95);
  --glass-border: rgba(99, 102, 241, 0.4);
  --glass-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  --text-primary: #f9fafb;
  --text-secondary: #e5e7eb;
  --text-muted: #d1d5db;
  --bg-primary: rgba(17, 24, 39, 0.95);
  --bg-secondary: rgba(31, 41, 55, 0.95);
}

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  background: #1a1a2e;
}

/* Animated Gradient Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    #667eea 0%,
    #764ba2 25%,
    #f093fb 50%,
    #f5576c 75%,
    #fda085 100%
  );
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  z-index: -2;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Floating Particles */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: float 20s infinite linear;
}

@keyframes float {
  0% {
    transform: translateY(100vh) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100vh) translateX(100px);
    opacity: 0;
  }
}

/* Main Container */
.main-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--space-6) var(--space-2);
  position: relative;
  z-index: 1;
}

/* Header */
.header {
  text-align: center;
  padding: var(--space-4) 0;
  position: relative;
  z-index: 10;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-icon {
  font-size: var(--text-3xl);
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.logo-text {
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 0 rgba(0, 0, 0, 0.1);
}

.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: var(--glass-backdrop);
  font-size: var(--text-xl);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--glass-shadow);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* Layout Container */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding: 0 var(--space-2);
  flex-grow: 1;
}

@media (min-width: 1024px) {
  .app-container {
    grid-template-columns: 1fr 300px;
    padding-bottom: var(--space-6);
  }
}

/* Glass Card Base Style */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border-radius: var(--glass-border-radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow) inset 0 0 10px rgba(255, 255, 255, 0.1);;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(31, 38, 135, 0.5);
}

/* Main Converter Section */
.converter-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.converter-card {
  padding: var(--space-8) var(--space-7);
  border: 2px solid var(--glass-border);
  position: relative;
}

.converter-card::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(
    45deg,
    var(--primary),
    var(--secondary),
    var(--accent),
    var(--primary)
  );
  border-radius: var(--glass-border-radius);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal);
  background-size: 400% 400%;
  animation: borderGlow 10s ease infinite;
}

.converter-card:hover::after {
  opacity: 0.9;
}

@keyframes borderGlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Form Styles */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  margin-bottom: var(--space-1);
  font-weight: var(--font-weight-medium);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.form-input,
.form-select {
  width: 100%;
  padding: var(--space-3);
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--glass-border-radius);
  color: var(--text-primary);
  font-size: var(--text-base);
  font-family: var(--font-primary);
  transition: all var(--transition-normal);
  backdrop-filter: none;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1),
              0 8px 24px rgba(99, 102, 241, 0.2);
  transform: translateY(-1px);
}

.form-input::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

/* Currency Dropdown */
.currency-dropdown {
  position: relative;
}

.currency-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.75rem center;
  background-repeat: no-repeat;
  background-size: 1.5rem;
  padding-right: 2.5rem;
}

/* Swap Button Section */
.swap-section {
  display: flex;
  justify-content: center;
  margin: var(--space-2) 0;
}

.swap-button {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: 50%;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: white;
  font-size: var(--text-xl);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.swap-button:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.swap-button.rotating {
  animation: rotate360 0.6s ease-in-out;
}

@keyframes rotate360 {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Action Buttons */
.button-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: var(--glass-border-radius);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: 48px;
}

.button-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.button-primary:hover::before {
  width: 300px;
  height: 300px;
}

.button-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.5);
}

.button-primary:active {
  transform: translateY(0);
}

.button-primary.loading {
  pointer-events: none;
  opacity: 0.7;
}

.button-primary.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 2px solid transparent;
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Amount Presets */
.amount-presets {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.preset-button {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-1) var(--space-2);
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.preset-button:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

/* Result Display */
.result-container {
  margin-top: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-border-radius);
  text-align: center;
  backdrop-filter: var(--glass-backdrop);
  opacity: 0; 
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.result-container.show {
  opacity: 1;
  transform: translateY(0);
}

.result-amount {
  font-size: var(--text-4xl);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.result-original {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.result-rate {
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding: var(--space-2);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  margin-top: var(--space-2);
}

.copy-button {
  margin-top: var(--space-2);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-1) var(--space-3);
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Sidebars */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.sidebar-card {
  padding: var(--space-4);
}

.sidebar-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

/* Favorites Bar */
.favorites-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.favorite-btn {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.favorite-btn:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.favorite-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

/* History Section */
.history-container {
  max-height: 400px;
  overflow-y: auto;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.history-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

[data-theme="dark"] .history-item {
    background: rgba(31, 41, 55, 0.85); /* Slightly less opaque than the main sidebar background (0.95) to create depth and contrast */
    border: 1px solid var(--glass-border);
}

[data-theme="dark"] .history-item:hover {
    background: rgba(99, 102, 241, 0.1); /* Highlight with a subtle primary color tint */
    transform: translateX(4px);
}

.history-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateX(4px);
}

.history-main {
  font-size: var(--text-sm);
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

.history-time {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.history-reload {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-1);
  transition: all var(--transition-normal);
  font-size: var(--text-sm);
}

.history-reload:hover {
  color: var(--primary);
  transform: rotate(180deg);
}

/* Clear History Button */
.clear-history {
  margin-top: var(--space-3);
  background: var(--error);
  color: white;
  border: none;
  border-radius: 8px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  width: 100%;
}

.clear-history:hover {
  background: #dc2626;
  transform: translateY(-1px);
}

/* Error and Success Messages */
.message-container {
  position: fixed;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-modal);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--glass-border-radius);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  opacity: 0;
  transform: translateX(-50%) translateY(-20px);
  transition: all var(--transition-normal);
  backdrop-filter: var(--glass-backdrop);
  max-width: 90%;
  text-align: center;
}

.message-container.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.message-container.success {
  background: linear-gradient(135deg, var(--success), #059669);
  color: white;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.message-container.error {
  background: linear-gradient(135deg, var(--error), #dc2626);
  color: white;
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}

.message-container.shake {
  animation: shake 0.5s;
}

@keyframes shake {
  0%, 100% { transform: translateX(-50%) translateY(0) rotate(0deg); }
  25% { transform: translateX(-55%) translateY(0) rotate(-5deg); }
  75% { transform: translateX(-45%) translateY(0) rotate(5deg); }
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-loading);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(4px);
}

.loading-overlay.show {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top: 4px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.loading-text {
  color: white;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  text-align: center;
}

/* Skeleton Loading States */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-text {
  height: 1rem;
  margin-bottom: var(--space-1);
}

.skeleton-title {
  height: 1.5rem;
  margin-bottom: var(--space-2);
  width: 60%;
}

/* Responsive Design */
@media (max-width: 1023px) {
  .app-container {
    grid-template-columns: 1fr;
    padding: var(--space-8);
  }

  .sidebar {
    order: 2;
  }

  .converter-section {
    order: 1;
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--space-3);
  }

  .logo-text {
    font-size: var(--text-2xl);
  }

  .converter-card {
    padding: var(--space-4);
  }

  .amount-presets {
    justify-content: center;
  }

  .preset-button {
    flex: 1;
    min-width: 60px;
    text-align: center;
  }

  .result-amount {
    font-size: var(--text-2xl);
  }

  .swap-button {
    width: 48px;
    height: 48px;
    font-size: var(--text-lg);
  }
}

@media (max-width: 480px) {
  .main-container {
    padding: var(--space-1);
  }

  .converter-card {
    padding: var(--space-3);
  }

  .form-input,
  .form-select {
    padding: var(--space-2);
    font-size: var(--text-sm);
  }

  .button-primary {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
  }

  .sidebar-card {
    padding: var(--space-3);
  }

  .favorites-bar {
    justify-content: center;
  }

  .favorite-btn {
    min-width: 50px;
    text-align: center;
  }
}

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

@media (prefers-contrast: high) {
  .glass-card {
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid var(--primary);
  }

  [data-theme="dark"] .glass-card {
    background: rgba(0, 0, 0, 0.95);
    border: 2px solid var(--primary);
  }
}

/* Focus Management */
.form-input:focus,
.form-select:focus,
.button-primary:focus,
.swap-button:focus,
.favorite-btn:focus,
.theme-toggle:focus {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

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

.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;
}

/* Print Styles */
@media print {
  .header,
  .sidebar,
  .loading-overlay,
  .message-container {
    display: none;
  }

  .converter-section {
    max-width: 600px;
    margin: 0 auto;
  }

  .glass-card {
    background: white;
    border: 1px solid #ccc;
    box-shadow: none;
  }

  body {
    background: white;
    color: black;
  }
}

/* Performance Optimizations */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
}

.smooth-transition {
  transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
}

/* Advanced Features Styles */

/* Multi-Currency Results */
.multi-currency-results {
  text-align: center;
}

.result-header h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-1);
  font-size: var(--text-2xl);
  font-weight: var(--font-weight-bold);
}

.result-header p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
}

.currency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.currency-result-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-border-radius);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.currency-result-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

.currency-flag {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
}

.currency-info {
  text-align: center;
  flex: 1;
}

.currency-amount {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.currency-name {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.currency-rate {
  font-size: var(--text-xs);
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.1);
  padding: var(--space-1);
  border-radius: 4px;
}

.copy-individual {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: none;
  border: none;
  font-size: var(--text-sm);
  cursor: pointer;
  opacity: 0.7;
  transition: all var(--transition-normal);
}

.copy-individual:hover {
  opacity: 1;
  transform: scale(1.1);
}

.multi-currency-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

.export-btn,
.compare-btn,
.historical-btn {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 8px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.export-btn:hover,
.compare-btn:hover,
.historical-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Historical Rates Modal */
.historical-rates-container {
  padding: var(--space-3);
}

.rate-header {
  text-align: center;
  margin-bottom: var(--space-4);
}

.rate-header h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.rate-period {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.rates-chart {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  height: 200px;
  margin-bottom: var(--space-4);
  padding: var(--space-2);
  background: var(--glass-bg);
  border-radius: var(--glass-border-radius);
  position: relative;
}

.rate-bar {
  width: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 6px 6px 0 0;
  position: relative;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.rate-bar:hover {
  transform: scaleY(1.05);
  filter: brightness(1.2);
}

.rate-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: var(--space-1);
  border-radius: 4px;
  font-size: var(--text-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  z-index: 1000;
}

.rate-bar:hover .rate-tooltip {
  opacity: 1;
}

.rate-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

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

.stat-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.stat-value {
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.change-value {
  font-weight: var(--font-weight-bold);
}

.change-value:nth-child(odd) {
  color: var(--success);
}

.change-value:nth-child(even) {
  color: var(--error);
}

.chart-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
}

.export-chart,
.set-alert {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.export-chart:hover,
.set-alert:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.form-group {
  margin-bottom: var(--space-3);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-1);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

.form-actions {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.btn-primary,
.btn-secondary,
.btn-danger {
  border: none;
  border-radius: 8px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  flex: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

.btn-secondary {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-danger {
  background: linear-gradient(135deg, var(--error), #dc2626);
  color: white;
}

/* News Section */
.news-section h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.news-list {
  max-height: 300px;
  overflow-y: auto;
}

.news-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-3);
  margin-bottom: var(--space-2);
  transition: all var(--transition-normal);
}

.news-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateX(4px);
}

.news-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-2);
}

.news-header h4 {
  font-size: var(--text-base);
  color: var(--text-primary);
  margin: 0;
  flex: 1;
}

.news-source {
  font-size: var(--text-xs);
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: var(--space-2);
}

.news-summary {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: var(--space-2);
}

.news-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.news-time {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.news-currencies {
  display: flex;
  gap: var(--space-1);
}

.currency-tag {
  font-size: var(--text-xs);
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
}

.no-news {
  text-align: center;
  color: var(--text-muted);
  padding: var(--space-4);
}

/* Settings Modal */
.settings-container {
  padding: var(--space-3);
}

.setting-group {
  margin-bottom: var(--space-4);
}

.setting-group h4 {
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: var(--space-2);
}

.setting-item {
  margin-bottom: var(--space-3);
}

.setting-item label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
}

.setting-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.setting-item input[type="number"] {
  width: 100px;
  padding: var(--space-1);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  color: var(--text-primary);
}

.setting-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--glass-border);
}

/* Feature Buttons */
.feature-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.feature-btn {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: var(--space-2);
  color: var(--text-primary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: left;
  backdrop-filter: blur(10px);
}

.feature-btn:hover {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  padding: var(--space-2);
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-border-radius);
  box-shadow: var(--glass-shadow);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  border-bottom: 1px solid var(--glass-border);
}

.modal-header h3 {
  color: var(--text-primary);
  margin: 0;
  font-size: var(--text-xl);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--text-2xl);
  color: var(--text-muted);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-normal);
}

.modal-close:hover {
  background: var(--error);
  color: white;
}

.modal-body {
  padding: var(--space-4);
}

/* Currency Comparison */
.comparison-container {
  padding: var(--space-3);
}

.comparison-chart {
  margin-bottom: var(--space-4);
}

.comparison-item {
  margin-bottom: var(--space-3);
}

.comparison-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.comparison-name {
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.comparison-bar {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  height: 30px;
  position: relative;
  overflow: hidden;
}

.comparison-fill {
  height: 100%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  transition: width var(--transition-slow);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--space-2);
}

.comparison-value {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: white;
}

.comparison-rate {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.comparison-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-border-radius);
  padding: var(--space-3);
}

.comparison-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
}

/* Footer Styles */
.app-footer {
  background: var(--glass-bg);
  backdrop-filter: none;
  border-top: 1px solid var(--glass-border);
  padding: var(--space-6) 0;
  margin-top: auto;
  border-radius: var(--glass-border-radius);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  border-radius: var(--glass-border-radius);
}

.footer-text-content {
  font-size: var(--text-base);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.footer-link {
  color: var(--primary);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.footer-link:hover {
  color: var(--secondary);
  text-decoration: underline;
}

.footer-links {
  margin-bottom: var(--space-3);
}

.footer-features {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

.feature-tag {
  font-size: var(--text-xs);
  background: rgba(99, 102, 241, 0.2);
  color: var(--primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--glass-border-radius);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

/* Responsive Design Updates */
@media (max-width: 768px) {
  .currency-grid {
    grid-template-columns: 1fr;
  }

  .rate-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .multi-currency-actions {
    flex-direction: column;
  }

  .feature-buttons {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .feature-btn {
    flex: 1;
    min-width: 120px;
  }

  .footer-features {
    flex-direction: column;
    align-items: center;
  }

  .comparison-stats {
    grid-template-columns: 1fr;
  }

  .modal-content {
    margin: var(--space-2);
    max-height: 90vh;
  }
}

@media (max-width: 480px) {
  .calc-buttons {
    gap: var(--space-1);
  }

  .calc-btn {
    padding: var(--space-2);
    font-size: var(--text-base);
  }

  .feature-btn {
    font-size: var(--text-xs);
    min-width: 100px;
  }
}