/* High-end CSS: variables, utility classes, responsive grid, transitions */
:root{
  --blue:#0b63ff;
  --red:#e53935;
  --black:#0b0b0b;
  --white:#ffffff;

  --bg: #ffffff;
  --muted: #6b7280;

  --radius: 14px;
  --shadow: 0 6px 20px rgba(11,11,11,0.08);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  margin:0; color:var(--black); background:var(--bg); -webkit-font-smoothing:antialiased;
}
.container{max-width:1200px;margin:0 auto;padding:28px}

/* header */
.site-header{background:var(--white);position:sticky;top:0;z-index:60;border-bottom:1px solid rgba(11,11,11,0.04);backdrop-filter: blur(4px)}
.nav-grid{display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--black)}
.brand-logo{width:44px;height:44px;border-radius:50%;object-fit:cover}
.brand-text{font-weight:700;font-family:'Montserrat',sans-serif}
.main-nav{display:flex;gap:18px;margin-left:24px}
.main-nav a{color:var(--black);text-decoration:none;padding:8px 4px;position:relative;transition:transform .18s ease}
.main-nav a:hover{color:var(--blue);transform:translateY(-2px)}
.nav-cta{margin-left:auto}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:10px;border:0;cursor:pointer;text-decoration:none}
.btn-primary{background:var(--red);color:var(--white);box-shadow:var(--shadow);transition:transform .18s ease,background .18s ease}
.btn-primary:hover{transform:scale(1.03);background:var(--blue)}
.btn-ghost{background:transparent;border:1px solid rgba(11,11,11,0.08);padding:9px 12px}
.large{padding:14px 20px}
.nav-toggle{display:none;background:none;border:0;padding:8px}

/* Hero */
.hero{padding:60px 0}
.hero-grid{display:grid;grid-template-columns:1fr 460px;gap:28px;align-items:center}
.hero-title{font-size:40px;margin:0 0 12px;color:var(--black);font-weight:800}
.hero-sub{margin:0 0 18px;color:var(--muted)}
.hero-actions{display:flex;gap:12px;margin-bottom:14px}
.hero-features{display:flex;gap:14px;list-style:none;padding:0;margin:0;color:var(--muted)}
.hero-card{border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.hero-card img{width:100%;height:100%;object-fit:cover;display:block}

/* Sections */
.section{padding:60px 0}
.section-header h2{font-size:28px;margin:0 0 6px;color:var(--blue)}
.section-header p{margin:0 0 18px;color:var(--muted)}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 360px;gap:24px;align-items:center}
.muted{color:var(--muted)}

/* Services */
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:18px}
.card{background:var(--white);padding:18px;border-radius:12px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-8px);box-shadow:0 20px 40px rgba(11,11,11,0.12)}
.service-card .icon{font-size:28px;margin-bottom:8px}

/* Portfolio */
.portfolio-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.project-card img{width:100%;height:220px;object-fit:cover;border-radius:10px}
.project-info{padding-top:8px}
.link{color:var(--blue);text-decoration:none}

/* Certificate */
.certificate-wrap{display:flex;align-items:center;gap:18px;padding:18px}
.certificate-img{width:320px;border-radius:10px}
.certificate-badge{background:var(--blue);color:var(--white);padding:8px 12px;border-radius:999px;font-weight:700}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 420px;gap:24px;align-items:start}
.contact-list{list-style:none;padding:0}
.contact-form{display:flex;flex-direction:column;gap:12px}
.contact-form input, .contact-form textarea{padding:10px;border-radius:8px;border:1px solid rgba(11,11,11,0.08)}

/* Footer */
.site-footer{background:var(--black);color:var(--white);padding:20px 0;margin-top:30px}
.footer-grid{display:flex;justify-content:space-between;align-items:center}
.socials a{color:var(--white);margin-left:12px;text-decoration:none}

/* Floating FAB WhatsApp */
.fab-whatsapp{position:fixed;right:18px;bottom:18px;background:var(--green, #25D366);width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 28px rgba(37,211,102,0.18);color:var(--white);text-decoration:none}
.fab-whatsapp .material-icons{font-size:24px}

/* Responsive */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .portfolio-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .main-nav{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .nav-cta{display:none}
  .services-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}

/* Scroll reveal helper */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

.fab-whatsapp img.whatsapp-icon{
    width:90px;
    height:90px;
    object-fit:contain;
    }