/* Modern Exchange Rate Website - Mobile-First Design */

/* Import modern fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* CSS Custom Properties for modern design system */
:root {
  /* Modern Color Palette */
  --color-white: #ffffff;
  --color-black: #000000;
  
  /* Neutral Grays */
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;
  
  /* Primary Brand Colors */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;
  
  /* Success Colors */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-300: #86efac;
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;
  
  /* Warning Colors */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-200: #fde68a;
  --color-warning-300: #fcd34d;
  --color-warning-400: #fbbf24;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  
  /* Error Colors */
  --color-error-50: #fef2f2;
  --color-error-100: #fee2e2;
  --color-error-200: #fecaca;
  --color-error-300: #fca5a5;
  --color-error-400: #f87171;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;
  
  /* Background Colors */
  --bg-primary: var(--color-white);
  --bg-secondary: var(--color-gray-50);
  --bg-tertiary: var(--color-gray-100);
  --bg-card: var(--color-white);
  --bg-overlay: rgba(0, 0, 0, 0.5);
  --header-bg: rgba(255, 255, 255, 0.85);
  
  /* Text Colors */
  --text-primary: var(--color-gray-900);
  --text-secondary: var(--color-gray-600);
  --text-tertiary: var(--color-gray-500);
  --text-inverse: var(--color-white);
  --text-link: var(--color-primary-600);
  
  /* Border Colors */
  --border-light: var(--color-gray-200);
  --border-medium: var(--color-gray-300);
  --border-dark: var(--color-gray-400);
  
  /* Typography */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  /* Font Sizes - Mobile First */
  --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 */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Spacing - Mobile First */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;  /* 2px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-3xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: var(--color-gray-800);
    --bg-secondary: var(--color-gray-900);
    --bg-tertiary: var(--color-gray-800);
    --bg-card: var(--color-gray-800);
    --text-primary: var(--color-gray-100);
    --text-secondary: var(--color-gray-300);
    --text-tertiary: var(--color-gray-400);
    --border-light: var(--color-gray-700);
    --border-medium: var(--color-gray-600);
    --border-dark: var(--color-gray-500);
    --header-bg: rgba(23, 23, 23, 0.75);
  }
}

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

html {
  font-family: var(--font-family-sans);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-relaxed);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4) 0;
  font-weight: 600;
  line-height: var(--leading-tight);
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

h1 {
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: var(--leading-tight);
}

h2 {
  font-size: var(--text-3xl);
  font-weight: 700;
}

h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
}

h4 {
  font-size: var(--text-xl);
  font-weight: 600;
}

p {
  margin: 0 0 var(--space-4) 0;
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

/* Layout Components */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-wide {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Header */
.header {
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--border-light);
  padding: var(--space-6) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.header-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  line-height: var(--leading-tight);
}

.header-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: var(--space-1) 0 0 0;
  font-weight: 400;
}

/* Main Content */
.main {
  padding: var(--space-8) 0;
}

.content-grid {
  display: grid;
  gap: var(--space-8);
  max-width: 1200px;
  margin: 0 auto;
}

.content-main {
  width: 100%;
}

/* Section Styling */
.section {
  margin-bottom: var(--space-12);
}

.section-header {
  margin-bottom: var(--space-8);
  text-align: center;
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  line-height: var(--leading-tight);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Card Components */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-light);
  background-color: var(--bg-tertiary);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-2) 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
  font-weight: 400;
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  background-color: var(--bg-tertiary);
  border-top: 1px solid var(--border-light);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-align: center;
}

/* Rate Display Components */
.rate-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.rate-grid-single {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.rate-item {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.rate-item:hover {
  background-color: var(--bg-secondary);
  transform: translateY(-1px);
}

.rate-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.rate-value {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-family-mono);
  line-height: var(--leading-tight);
}

.currency-symbol {
  font-family: var(--font-family-sans);
  font-weight: 500;
  margin-right: var(--space-1);
}

.rate-currency {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-left: var(--space-1);
}

/* Table Components */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  background-color: var(--bg-card);
}

.exchange-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.exchange-table th {
  background-color: var(--bg-tertiary);
  padding: var(--space-4) var(--space-3);
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

.exchange-table th a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.exchange-table th a:hover {
  color: var(--text-link);
}

.exchange-table td {
  padding: var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.exchange-table tr:last-child td {
  border-bottom: none;
}

.exchange-table tr:hover {
  background-color: var(--bg-tertiary);
}

.exchange-table .text-right {
  text-align: right;
  font-family: var(--font-family-mono);
  font-weight: 500;
}

.exchange-table .text-center {
  text-align: center;
}

/* Mobile Cards */
.mobile-cards {
  display: grid;
  gap: var(--space-4);
}

.bank-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.bank-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.bank-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.bank-card:active {
  transform: translateY(0);
}

.bank-card-header {
  margin-bottom: var(--space-4);
}

.bank-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.bank-card-rates {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.bank-card-rate {
  text-align: center;
}

.bank-card-rate-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.bank-card-rate-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-family-mono);
}

.bank-card-update {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  text-align: center;
}

/* Icon Components */
.icon {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-sm {
  width: 1rem;
  height: 1rem;
}

.icon-lg {
  width: 1.5rem;
  height: 1.5rem;
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background-color: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  border-color: var(--border-medium);
  text-decoration: none;
}

.btn:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn-primary {
  color: var(--text-inverse);
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
}

.btn-primary:hover {
  background-color: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: var(--text-inverse);
}

/* Information Section */
.info-section {
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.info-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .info-grid {
    grid-template-columns: 2fr 1fr;
    gap: var(--space-12);
  }
}

.info-content h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.info-content ul {
  margin: var(--space-4) 0;
  padding-left: var(--space-6);
}

.info-content li {
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
}

.info-sidebar {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--border-light);
}

.info-sidebar h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.info-sidebar ul {
  margin: 0;
  padding-left: var(--space-4);
}

.info-sidebar li {
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.info-sidebar li:last-child {
  margin-bottom: 0;
}

.info-sidebar strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* FAQ Section */
.faq-section {
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.faq-grid {
  display: grid;
  gap: var(--space-6);
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  padding: var(--space-5);
  background-color: var(--bg-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: all var(--transition-fast);
  position: relative;
  user-select: none;
}

.faq-question:hover {
  background-color: var(--bg-secondary);
}

.faq-question:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: -2px;
}

.faq-question::after {
  content: '';
  position: absolute;
  right: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  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 8 4 4 4-4'/%3e%3c/svg%3e");
  background-size: contain;
  background-repeat: no-repeat;
  transition: transform var(--transition-fast);
}

.faq-question.active::after {
  transform: translateY(-50%) rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--space-5) var(--space-5);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.faq-answer ul {
  margin: var(--space-3) 0;
  padding-left: var(--space-6);
}

.faq-answer li {
  margin-bottom: var(--space-2);
}

/* Footer */
.footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-light);
  padding: var(--space-8) 0;
  margin-top: var(--space-16);
}

.footer-content {
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

/* Footer Grid Layout */
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
  }
}

/* Footer Sections */
.footer-section h3 {
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.footer-section h4 {
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.footer-section p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-3);
}

/* Footer Lists - Remove Bullets */
.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: var(--space-2);
}

.footer-section li:last-child {
  margin-bottom: 0;
}

.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

/* Social Links */
.social-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--color-primary-500);
  color: var(--color-white);
  transform: translateY(-2px);
}

.social-links .icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Footer Bottom */
.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: var(--space-6);
  text-align: center;
}

.footer-bottom p {
  margin-bottom: var(--space-2);
  color: var(--text-tertiary);
  font-size: var(--text-xs);
}

.footer-bottom p:last-child {
  margin-bottom: 0;
}

/* Enhanced Toast Notifications */
.toast {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-toast);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-normal);
  max-width: 400px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast-icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--text-secondary);
}

.toast-text {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: var(--leading-relaxed);
}

.toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: var(--text-lg);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.toast-close:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.toast-info {
  border-left: 4px solid var(--color-primary-500);
}

.toast-info .toast-icon {
  color: var(--color-primary-500);
}

.toast-success {
  border-left: 4px solid var(--color-success-500);
}

.toast-success .toast-icon {
  color: var(--color-success-500);
}

.toast-warning {
  border-left: 4px solid var(--color-warning-500);
}

.toast-warning .toast-icon {
  color: var(--color-warning-500);
}

.toast-error {
  border-left: 4px solid var(--color-error-500);
}

.toast-error .toast-icon {
  color: var(--color-error-500);
}

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

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

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Loading States */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  animation: shimmer 1.5s infinite;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }

/* Responsive Utilities */
@media (min-width: 640px) {
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  .sm\:flex { display: flex; }
  .sm\:grid { display: grid; }
}

@media (min-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
}

@media (min-width: 1024px) {
  .lg\:hidden { display: none; }
  .lg\:block { display: block; }
  .lg\:flex { display: flex; }
  .lg\:grid { display: grid; }
}

/* Interactive States */
.btn:active {
  transform: translateY(1px);
}

.bank-card:active {
  transform: translateY(0);
}

/* Focus Management */
.btn:focus,
.faq-question:focus,
.bank-card:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Keyboard Navigation */
.keyboard-navigation *:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary-600);
  color: var(--text-inverse);
  padding: 8px;
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .btn,
  .faq-question::after {
    display: none !important;
  }
  
  .main {
    padding: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid var(--border-medium);
  }
  
  .exchange-table {
    border: 1px solid var(--border-medium);
  }
  
  .exchange-table th,
  .exchange-table td {
    border: 1px solid var(--border-medium);
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border-light: var(--color-gray-600);
    --border-medium: var(--color-gray-700);
    --border-dark: var(--color-gray-800);
  }
  
  .card {
    border-width: 2px;
  }
  
  .btn {
    border-width: 2px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .faq-question::after {
    transition: none;
  }
  
  .toast {
    transition: none;
  }
}

/* Desktop Enhancements */
@media (min-width: 1024px) {
  .header-title {
    font-size: var(--text-3xl);
  }
  
  .header-subtitle {
    font-size: var(--text-base);
  }
  
  .section-title {
    font-size: var(--text-4xl);
  }
  
  .section-subtitle {
    font-size: var(--text-xl);
  }
  
  .card {
    border-radius: var(--radius-2xl);
  }
  
  .card-header {
    padding: var(--space-8);
  }
  
  .card-body {
    padding: var(--space-8);
  }
  
  .rate-value {
    font-size: var(--text-4xl);
  }
  
  .exchange-table {
    font-size: var(--text-base);
  }
  
  .exchange-table th,
  .exchange-table td {
    padding: var(--space-5) var(--space-4);
  }
  
  .info-section {
    padding: var(--space-12);
  }
  
  .faq-section {
    padding: var(--space-12);
  }
  
  .toast {
    max-width: 450px;
  }
}

/* Large Desktop */
@media (min-width: 1400px) {
  .container-wide {
    max-width: 1600px;
  }
  
  .content-grid {
    max-width: 1400px;
  }
}

/* Mobile-specific improvements */
@media (max-width: 768px) {
  .header {
    padding: var(--space-4) 0;
  }
  
  .header-title {
    font-size: var(--text-xl);
  }
  
  .main {
    padding: var(--space-6) 0;
  }
  
  .section {
    margin-bottom: var(--space-8);
  }
  
  .section-title {
    font-size: var(--text-2xl);
  }
  
  .card-header,
  .card-body {
    padding: var(--space-4);
  }
  
  .rate-grid {
    grid-template-columns: 1fr;
  }
  
  .info-section {
    padding: var(--space-6);
  }
  
  .faq-section {
    padding: var(--space-6);
  }
  
  .toast {
    top: var(--space-2);
    right: var(--space-2);
    left: var(--space-2);
    max-width: none;
  }
}

@media (max-width: 480px) {
  .container,
  .container-wide {
    padding: 0 var(--space-3);
  }
  
  .card-header,
  .card-body {
    padding: var(--space-3);
  }
  
  .exchange-table th,
  .exchange-table td {
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-xs);
  }
  
  .rate-value {
    font-size: var(--text-2xl);
  }
  
  .bank-card-rate-value {
    font-size: var(--text-lg);
  }
}

/* Featured Grid */
.featured-grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 1024px) {
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}