/* 3 Patti World - Mobile-First Fast CSS | Google-Optimized */
:root {
  --primary: #0d47a1;
  --secondary: #ff6f00;
  --dark: #0a1929;
  --light: #f5f7fa;
  --white: #ffffff;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --radius: 12px;
  --transition: 0.2s ease;
  --max-width: 1140px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:100%;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;line-height:1.6;color:#333;background:var(--light);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--secondary)}
button{cursor:pointer;border:none;font-family:inherit}

/* Skip to content - Accessibility */
.skip-link{position:absolute;top:-100px;left:0;background:var(--primary);color:white;padding:12px 24px;z-index:9999;transition:top .3s}
.skip-link:focus{top:0}

/* Header */
.site-header{background:linear-gradient(135deg,var(--dark),#1a365d);color:white;padding:1rem 1.5rem;position:sticky;top:0;z-index:1000;box-shadow:var(--shadow)}
.header-inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.logo{font-size:1.5rem;font-weight:700;color:white}
.logo span{color:var(--secondary)}
.nav-toggle{display:none;background:none;color:white;font-size:1.5rem;padding:4px}

/* Navigation */
.main-nav ul{display:flex;list-style:none;gap:1.5rem;flex-wrap:wrap}
.main-nav a{color:rgba(255,255,255,0.9);padding:6px 0;font-weight:500}
.main-nav a:hover{color:white}

/* Hero CTA */
.cta-download{background:linear-gradient(135deg,var(--secondary),#e65100);color:white!important;padding:10px 20px;border-radius:8px;font-weight:600;display:inline-block}
.cta-download:hover{background:linear-gradient(135deg,#e65100,var(--secondary));transform:scale(1.05);color:white}

/* Main Content */
main{padding:2rem 1.5rem;max-width:var(--max-width);margin:0 auto}
article{background:white;border-radius:var(--radius);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow)}
h1{font-size:clamp(1.75rem,4vw,2.5rem);color:var(--dark);margin-bottom:1rem;line-height:1.3}
h2{font-size:clamp(1.35rem,3vw,1.75rem);color:var(--dark);margin:2rem 0 1rem;border-bottom:2px solid var(--secondary);padding-bottom:6px}
h3{font-size:1.25rem;margin:1.5rem 0 .75rem}
p{margin-bottom:1rem;text-align:justify}
ul,ol{margin:0 0 1rem 1.5rem}
li{margin-bottom:.5rem}

/* Download Box */
.download-box{background:linear-gradient(135deg,var(--primary),#1565c0);color:white;padding:2rem;border-radius:var(--radius);text-align:center;margin:2rem 0;box-shadow:0 4px 20px rgba(13,71,161,0.3)}
.download-box h3{margin-top:0;color:white}
.download-btn{display:inline-block;background:var(--secondary);color:white;padding:16px 40px;border-radius:10px;font-size:1.25rem;font-weight:700;margin-top:1rem;transition:var(--transition)}
.download-btn:hover{background:#e65100;transform:scale(1.05);color:white}
.download-link{color:white}

/* Content Images */
.content-img{width:100%;border-radius:var(--radius);margin:1.5rem 0;box-shadow:var(--shadow)}
.img-caption{font-size:.9rem;color:#666;text-align:center;margin-top:.5rem}

/* Table of Contents */
.toc{background:#f0f4f8;padding:1.5rem;border-radius:var(--radius);margin:2rem 0}
.toc h3{margin-top:0}
.toc ul{list-style:none;margin:0}
.toc li{margin:.5rem 0}
.toc a{font-weight:500}

/* Footer */
.site-footer{background:var(--dark);color:rgba(255,255,255,0.8);padding:2rem 1.5rem;margin-top:3rem;text-align:center}
.footer-inner{max-width:var(--max-width);margin:0 auto}
.footer-links{display:flex;justify-content:center;flex-wrap:wrap;gap:1.5rem;margin-bottom:1rem}
.footer-links a{color:rgba(255,255,255,0.8)}
.footer-links a:hover{color:white}
.copyright{font-size:.9rem;opacity:.8}

/* Breadcrumb */
.breadcrumb{padding:.5rem 0;font-size:.9rem;color:#666}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{color:#999}

/* Related Articles */
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;margin:2rem 0}
.related-card{background:#f8fafc;padding:1rem;border-radius:8px;border:1px solid #e2e8f0;transition:var(--transition)}
.related-card:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.related-card h4{font-size:1rem;margin-bottom:.5rem}
.related-card a{font-weight:500}

/* Schema - FAQ */
.faq-item{margin-bottom:1rem;padding:1rem;background:#f8fafc;border-radius:8px}
.faq-item h4{margin:0 0 .5rem}

/* Mobile - Hamburger Menu */
@media(max-width:768px){
  .nav-toggle{display:block}
  .main-nav{width:100%;display:none}
  .main-nav.active{display:block}
  .main-nav ul{flex-direction:column;padding:1rem 0}
  main{padding:1rem}
  article{padding:1.5rem}
  .download-box{padding:1.5rem}
}
@media(min-width:769px){
  .main-nav{display:block!important}
}

/* Performance - Reduce motion */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* Print */
@media print{
  .site-header,.download-box,.related,.footer-links{display:none!important}
  body{background:white}
  article{box-shadow:none;border:1px solid #ddd}
}