/* ================= RESET ================= */
*,*::before,*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

html{scroll-behavior:smooth;}

body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  color:#1e293b;
  line-height:1.6;
  background:#fff;
}

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

a{text-decoration:none;color:inherit;}

/* ================= LAYOUT ================= */
.container{
  max-width:1100px;
  margin:0 auto;
  padding:0 1.25rem;
}

/* ================= NAV ================= */
.nav{
  position:fixed;
  top:0;
  left:0;
  right:0;
  background:#fff;
  z-index:100;
  transition:box-shadow .2s;
}

.nav.scrolled{
  box-shadow:0 1px 3px rgba(0,0,0,.08);
}

.nav-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  height:64px;
}

.logo{
  font-weight:700;
  font-size:1.2rem;
  color:#1e3a5f;
}

.nav-links{
  display:flex;
  gap:1.5rem;
  list-style:none;
}

.nav-links a{
  color:#475569;
  font-size:.9rem;
}

.nav-links a:hover{
  color:#1e3a5f;
}

/* ================= HERO ================= */
.hero{
  padding:8rem 0 5rem;
  background:
    linear-gradient(rgba(15,31,53,.8), rgba(42,90,143,.8)),
    url('hero.jpg') center/cover no-repeat;
  color:#fff;
  text-align:center;
}

.hero h1{
  font-size:2.6rem;
  line-height:1.2;
  margin-bottom:1rem;
}

.hero p{
  opacity:.9;
  margin-bottom:1rem;
}

.hero-actions{
  margin-top:2rem;
}

/* ================= BUTTONS ================= */
.btn{
  display:inline-block;
  padding:.75rem 1.5rem;
  border-radius:8px;
  font-weight:600;
}

.btn-primary{
  background:#1e3a5f;
  color:#fff;
}

.btn-primary:hover{
  background:#2a5a8f;
}

/* ================= SECTIONS ================= */
.section{
  padding:5rem 0;
}

.section-alt{
  background:#f8fafc;
}

.section-title{
  font-size:2rem;
  margin-bottom:1rem;
  color:#1e3a5f;
  text-align:center;
}

.section-subtitle{
  text-align:center;
  color:#475569;
  margin-bottom:2.5rem;
}

/* ================= SERVICES ================= */
.services-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:1.5rem;
}

.card{
  background:#fff;
  padding:1.5rem;
  border-radius:8px;
  box-shadow:0 1px 3px rgba(0,0,0,.08);
}

/* ================= UTILS ================= */
.text-left{text-align:left;}
.text-center{text-align:center;}

/* ================= FOOTER ================= */
.footer{
  background:#0f1f35;
  color:#fff;
  text-align:center;
  padding:2rem 0;
  font-size:.9rem;
}

/* ================= MOBILE ================= */
@media(max-width:768px){
  .hero h1{font-size:1.8rem;}
  .nav-links{display:none;}
}
/* ================= WHATSAPP ================= */

.btn-whatsapp{
  background:#25D366;
  color:#fff;
}

.btn-whatsapp:hover{
  background:#1ebe5d;
}

.whatsapp-float{
  position:fixed;
  right:20px;
  bottom:20px;
  width:60px;
  height:60px;
  border-radius:50%;
  background:#25D366;
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.8rem;
  box-shadow:0 10px 25px rgba(0,0,0,.2);
  z-index:999;
  transition:transform .2s;
}

.whatsapp-float:hover{
  transform:scale(1.08);
}