.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: #0f1720; /* Ensure background is solid */
}

.nav {
  transition: max-height 0.3s ease;
  overflow: hidden;
}

:root{
  --bg:#0b1220;
  --panel:#071023;
  --muted:#98a0ad;
  --accent-blue:#06b6d4;
  --accent-purple:#7c3aed;
  --accent-orange:#ff6600;
  --accent-red:#ff2d55;
  --glass: rgba(255,255,255,0.03);
  --max-width:1100px;
  --radius:12px;
  --ff: Inter, "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial;
}

.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
  background-color: #25d366;
  border-radius: 50%;
  padding: 12px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}

.whatsapp-float:hover {
  transform: scale(1.1);
}

.whatsapp-icon {
  width: 32px;
  height: 32px;
}


/* Base styles */
.nav {
  display: flex;
  gap: 1.5rem;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1rem;
  color: white;
  cursor: pointer;
}

/* Responsive styles */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    background-color: #0f1720;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: 1rem;
  }

  .nav-list {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav.open {
    display: flex;
  }
}
*{box-sizing:border-box}
html,body{height:100%}
body.theme{
  margin:0;
  font-family:var(--ff);
  background: linear-gradient(180deg,var(--bg) 0%, #030409 80%);
  color: #e6eef8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  font-size:16px;
}

/* layout */
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}
.header-inner{display:flex;align-items:center;gap:16px;justify-content:space-between;padding:18px 0}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.brand-logo{width:64px;height:auto;display:block;border-radius:8px;background:linear-gradient(135deg,var(--accent-orange),var(--accent-red));padding:6px}
.brand-logo.small{width:44px}
.brand-name{display:block;font-weight:800;letter-spacing:0.06em;font-size:1.05rem}
.brand-tag{display:block;font-size:0.72rem;color:var(--accent-blue);margin-top:2px}

/* nav */
.nav{display:block; position: sticky;}
.nav-list{list-style:none;margin:0;padding:0;display:flex;gap:14px;align-items:center}
.nav-list a{color:var(--muted);text-decoration:none;padding:8px 10px;border-radius:8px;transition:all .18s}
.nav-list a:hover{color:#fff;background:rgba(255,255,255,0.03)}
.nav-list a.active{background:linear-gradient(90deg, rgba(6,182,212,0.12), rgba(124,58,237,0.08));color:#fff}

/* mobile nav */
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,0.04);color:var(--muted);padding:8px 10px;border-radius:8px}
.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* hero */
.hero{display:grid;grid-template-columns:1fr 520px;gap:36px;align-items:center;padding:64px 0}
.hero-title{font-size:2.1rem;margin:0 0 12px;color:#fff;line-height:1.08}
.hero-lead{color:var(--muted);margin-bottom:18px}
.hero-ctas .btn{margin-right:12px}

/* device mockup */
.device-mockup{background:linear-gradient(180deg,#081021 0%, #04131f 100%);border-radius:18px;padding:14px;border:1px solid rgba(255,255,255,0.04);box-shadow: 0 10px 30px rgba(2,6,23,0.6);position:relative}
.device-mockup .screen img{width:100%;height:auto;display:block;border-radius:10px}
.ribbons{position:absolute;left:12px;bottom:12px;display:flex;gap:8px}
.ribbon{font-size:12px;padding:6px 8px;border-radius:999px;color:#061220}
.ribbon.orange{background:var(--accent-orange)}
.ribbon.purple{background:var(--accent-purple)}
.ribbon.blue{background:var(--accent-blue)}

/* sections */
.section-title{color:var(--accent-blue);font-size:1.15rem;margin-bottom:14px}
.cards{display:flex;gap:18px;flex-wrap:wrap}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:18px;border-radius:12px;flex:1;min-width:220px}

/* services grid */
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:18px}
.service{background:var(--glass);padding:18px;border-radius:12px;text-align:left}
.service h4{margin-top:8px;color:#fff}
.service p{color:var(--muted);font-size:0.95rem}

/* CTA */
.cta{margin:36px 0;padding:28px;border-radius:14px;background:linear-gradient(90deg, rgba(6,182,212,0.06), rgba(124,58,237,0.04));text-align:center}
.cta-inner h3{margin:0 0 8px}

/* footer */
.site-footer{margin-top:48px;padding-top:28px;background:linear-gradient(180deg, rgba(0,0,0,0.04), transparent)}
.footer-inner{display:flex;gap:20px;flex-wrap:wrap;padding:28px 0}
.foot-col{flex:1;min-width:180px}
.footer-bottom{background:#041018;padding:12px 0;color:var(--muted);text-align:center;border-top:1px solid rgba(255,255,255,0.02)}

/* forms */
.contact-grid{display:grid;grid-template-columns:380px 1fr;gap:28px}
.contact-panel{background:var(--panel);padding:20px;border-radius:12px}
.contact-form input,.contact-form textarea{width:100%;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);margin-bottom:10px;background:transparent;color:inherit}
.form-actions{display:flex;gap:10px;align-items:center}

/* buttons */
.btn{display:inline-block;text-decoration:none;padding:10px 16px;border-radius:10px;font-weight:600;border:1px solid transparent}
.btn-primary{background:linear-gradient(90deg,var(--accent-blue),var(--accent-purple));color:#061220;box-shadow:0 8px 20px rgba(6,182,212,0.08)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted)}

/* projects */
.projects{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.project-card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));border-radius:12px;overflow:hidden}
.project-card img{width:100%;display:block}

/* utilities */
.lead{color:var(--muted);margin-bottom:16px}
.dot-list{list-style:disc;margin-left:20px;color:var(--muted)}
.muted{color:var(--muted);font-size:0.95rem}
.more{text-align:right;margin-top:8px}

/* responsive */
@media (max-width:980px){
  .hero{grid-template-columns:1fr;gap:22px}
  .device-mockup{order:1}
  .nav{display:none}
  .nav-toggle{display:inline-block}
  .header-inner{align-items:center}
  .contact-grid{grid-template-columns:1fr}
}

/* animations (CSS-only light) */
[data-anim]{opacity:0;transform:translateY(10px);transition:opacity .6s ease, transform .6s ease}
[data-anim].in{opacity:1;transform:none}