:root {
  /* Color Palette */
  --primary-navy: #0f172a;
  --secondary-navy: #1e293b;
  --light-navy: #334155;
  --accent-orange: #f97316;
  --accent-orange-hover: #ea580c;
  --accent-gold: #f59e0b;
  
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  
  --text-dark: #0f172a;
  --text-medium: #334155;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  --text-white: #ffffff;
  
  --border-light: #e2e8f0;
  --border-focus: #cbd5e1;
  
  /* Layout Constants */
  --header-height: 80px;
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  
  /* Shadow Systems */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
  --shadow-premium: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --shadow-orange: 0 10px 15px -3px rgba(249, 115, 22, 0.3);
  
  /* Font Stacks */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-headings: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Transition Constants */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html,
body {
  height: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  background-color: var(--bg-light);
  color: var(--text-medium);
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex-grow: 1;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.25;
}

h1 {
  font-size: 2.75rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.25rem;
}

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

/* Common Layout Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-headings);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  text-align: center;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--accent-orange);
  color: var(--text-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--accent-orange-hover);
  box-shadow: var(--shadow-orange);
}

.btn-secondary {
  background-color: var(--primary-navy);
  color: var(--text-white);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background-color: var(--secondary-navy);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-navy);
  border: 2px solid var(--primary-navy);
}

.btn-outline:hover {
  background-color: var(--primary-navy);
  color: var(--text-white);
}

/* Section Standard Layouts */
.section-padding {
  padding-top: 80px;
  padding-bottom: 80px;
}

@media (max-width: 768px) {
  .section-padding {
    padding-top: 50px;
    padding-bottom: 50px;
  }
  
  h1 {
    font-size: 2.25rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
}

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Structured Markup Helpers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}