@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root{
  --black:#0B0F14;
  --navy:#0F1C2E;
  --blue:#1F3A5F;
  --gray:#6B7280;
  --light:#F5F7FA;
  --white:#FFFFFF;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:Inter, Arial, sans-serif;
  color:var(--black);
  background:white;
  line-height:1.6;
}

/* HEADER */
header{
  position:sticky;
  top:0;
  display:flex;
  justify-content:space-between;
  padding:20px 60px;
  background:white;
  border-bottom:1px solid #eee;
  z-index:10;
}

.logo{
  font-weight:800;
  letter-spacing:3px;
}

nav a{
  margin-left:18px;
  text-decoration:none;
  color:var(--black);
  font-size:13px;
  font-weight:500;
}

nav .cta{
  background:var(--blue);
  color:white;
  padding:10px 14px;
  border-radius:4px;
}

/* HERO */
.hero{
  position:relative;
  background:
    linear-gradient(rgba(11,15,20,0.70),rgba(11,15,20,0.70)),
    url('https://images.unsplash.com/photo-1501700493788-fa1a4fc9fe62?auto=format&fit=crop&w=2000&q=80')
    center/cover;
  padding:180px 60px;
  color:white;
}

.hero h1{
  font-size:60px;
  max-width:950px;
  margin:0;
  letter-spacing:-1px;
}

.hero p{
  margin-top:20px;
  max-width:750px;
  font-size:18px;
  color:#ddd;
}

.btn{
  display:inline-block;
  margin-top:30px;
  padding:14px 22px;
  background:white;
  color:var(--black);
  text-decoration:none;
  font-weight:600;
  border-radius:4px;
}

/* SECTIONS */
.section{
  padding:110px 60px;
}

.container{
  max-width:1200px;
  margin:auto;
}

h2{
  font-size:38px;
  margin-bottom:20px;
}

.muted{
  color:var(--gray);
  max-width:850px;
  font-size:17px;
}

/* GRID */
.grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:40px;
}

.card{
  border:1px solid #eee;
  padding:28px;
  transition:0.3s;
  background:white;
}

.card:hover{
  transform:translateY(-6px);
  box-shadow:0 15px 40px rgba(0,0,0,0.08);
}

.dark{
  background:var(--navy);
  color:white;
}

footer{
  padding:60px;
  text-align:center;
  border-top:1px solid #eee;
  font-size:13px;
  color:var(--gray);
}