/* ==========================================================================
   AVAL PAY SERVICES VIRTUAL DELIVERY - MAIN STYLESHEET
   Design System, CSS Variables, Reset & General Typography
   ========================================================================== */

:root {
  /* Color Palette - Tech Fintech & Secure Delivery */
  --primary-900: #091e36;
  --primary-800: #0f2942;
  --primary-700: #163a5f;
  --primary-600: #1d4ed8;
  --primary-500: #2563eb;
  
  --accent-teal: #0d9488;
  --accent-emerald: #10b981;
  --accent-emerald-light: #d1fae5;
  --accent-amber: #f59e0b;
  --accent-amber-light: #fef3c7;

  /* Neutral Tones */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-alt: #f1f5f9;
  --bg-dark: #0f172a;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-on-dark: #f8fafc;
  --text-on-dark-muted: #94a3b8;

  --border-light: #e2e8f0;
  --border-focus: #2563eb;
  
  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  /* Fonts & Typography */
  --font-family-base: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  /* Font Sizes */
  --fs-xs: 0.75rem;   /* 12px */
  --fs-sm: 0.875rem;  /* 14px */
  --fs-base: 1rem;    /* 16px */
  --fs-lg: 1.125rem;  /* 18px */
  --fs-xl: 1.25rem;   /* 20px */
  --fs-2xl: 1.5rem;   /* 24px */
  --fs-3xl: 1.875rem; /* 30px */
  --fs-4xl: 2.25rem;  /* 36px */
  --fs-5xl: 3rem;     /* 48px */

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Elevations / Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.25);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Container */
  --container-max-width: 1240px;
}

/* CSS Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Skip link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--primary-800);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 9999;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--accent-emerald);
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  color: var(--primary-900);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--fs-4xl); margin-bottom: var(--space-4); }
h2 { font-size: var(--fs-3xl); margin-bottom: var(--space-4); }
h3 { font-size: var(--fs-2xl); margin-bottom: var(--space-3); }
h4 { font-size: var(--fs-xl); margin-bottom: var(--space-2); }

p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
}

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

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-800);
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--border-focus);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* Container Utility */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-emerald {
  background-color: var(--accent-emerald-light);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-amber {
  background-color: var(--accent-amber-light);
  color: #b45309;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-navy {
  background-color: rgba(15, 41, 66, 0.1);
  color: var(--primary-900);
}

/* Main Content Wrapper */
main {
  flex: 1 0 auto;
}