/* Critical CSS - Above the fold styles for fast initial render */
/* This file contains only the essential styles needed for immediate page render */

/* CSS Variables - Critical for theme system */
:root {
  --color-bg-primary: #ffffff;
  --color-text-primary: #1a1a1a;
  --color-accent: #2563eb;
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 1rem;
  --line-height-base: 1.6;
  --spacing-unit: 1rem;
  --border-radius: 0.375rem;
  --transition-speed: 0.2s;
}

/* Critical base styles */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Critical layout elements */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Critical navigation styles */
.navbar {
  position: relative;
  z-index: 100;
  background: var(--color-bg-primary);
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

/* Critical hero styles to prevent layout shift */
.hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--color-bg-primary);
}

.hero-body {
  padding: 3rem 1.5rem;
}

/* Critical typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 1rem 0;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

/* Critical button styles */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  background: var(--color-accent);
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-speed) ease;
  cursor: pointer;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Critical utility classes */
.is-hidden { display: none !important; }
.has-text-centered { text-align: center; }
.mt-4 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1.5rem; }

/* Prevent FOUC */
.js .no-js-hidden { display: none !important; }
.no-js .js-only { display: none !important; }

/* Critical responsive breakpoints */
@media (max-width: 768px) {
  .container {
    padding: 0 0.75rem;
  }
  
  .hero-body {
    padding: 2rem 1rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
}