/* ============================================
   KodNaMature Landing Page Styles
   Mobile-first, fully responsive
   ============================================ */

:root {
  --color-bg: #060C16;
  --color-surface: #0D1B2E;
  --color-surface-2: #112240;
  --color-surface-offset: #0F2035;
  --color-border: rgba(107, 184, 232, 0.12);
  --color-border-glow: rgba(107, 184, 232, 0.35);
  --color-primary: #5AB2F7;
  --color-primary-hover: #82C8F9;
  --color-primary-dim: rgba(107, 184, 232, 0.1);
  --color-text: #EDF2F7;
  --color-text-muted: #A3BFDA;
  --color-text-faint: #6A89A8;
  --color-success: #3DDC97;
  --color-warning: #F5A623;
  --color-error: #FF6B6B;
  --color-navy: #1A3050;
  
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 999px;
  
  --shadow-glow-sm: 0 4px 16px rgba(90, 178, 247, 0.15);
  --shadow-glow-md: 0 8px 32px rgba(90, 178, 247, 0.25);
  --shadow-glow-lg: 0 16px 64px rgba(90, 178, 247, 0.2);
  
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 700ms cubic-bezier(0.16, 1, 0.3, 1);
  
  --text-hero: clamp(3rem, 6vw, 6rem);
  --text-2xl: clamp(2rem, 3.5vw, 3.25rem);
  --text-xl: clamp(1.25rem, 2vw, 1.75rem);
  --text-base: clamp(1rem, 1.1vw, 1.125rem);
  --text-sm: clamp(0.875rem, 0.9vw, 1rem);
  --text-xs: 0.75rem;
  
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "General Sans", system-ui, sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg, canvas {
  display: block;
  max-width: 100%;
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

h1, h2, h3 {
  font-family: "Clash Display", system-ui, sans-serif;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

/* ============================================
   Responsive Container
   ============================================ */

.container {
  width: min(100% - 2rem, 1200px);
  margin-inline: auto;
}

.narrow {
  width: min(100% - 2rem, 640px);
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: clamp(4rem, 9vw, 7rem);
  z-index: 2;
}

/* ============================================
   Core Web Vitals - Optimize for performance
   ============================================ */

script[src*="firebase"] {
  defer;
}

script[type="module"] {
  type: module;
}

/* ============================================
   Mobile-first responsive utilities
   ============================================ */

@media (max-width: 767px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu {
    display: block;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
  }
  
  .lesson-grid {
    grid-template-columns: 1fr;
  }
  
  .creator-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  
  .hero-grid {
    grid-template-columns: 1.1fr 1fr;
  }
  
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .testimonial-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .lesson-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  
  .creator-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

/* ============================================
   SEO & Accessibility
   ============================================ */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #060C16;
  padding: 0.75rem 1rem;
  z-index: 9999;
  font-weight: 700;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============================================
   Lazy Loading Images
   ============================================ */

img[loading="lazy"] {
  opacity: 1;
  transition: opacity 300ms ease-in;
}

img[loading="lazy"]:not([src]) {
  opacity: 0.5;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .nav-toggle,
  .mobile-menu,
  .mobile-cta,
  .scroll-progress {
    display: none;
  }
}