* { margin:0; padding:0; box-sizing:border-box; font-family: Inter, Arial; }

body {
  background:#f8fafc;
  color:#0f172a;
}

.container {
  max-width:1100px;
  margin:auto;
  padding:0 20px;
}

header {
  padding:20px 0;
  border-bottom:1px solid #e2e8f0;
}

.flex {
  display:flex;
  justify-content:space-between;
  align-items:center;
}

nav a {
  margin-left:20px;
  text-decoration:none;
  color:#475569;
}

.btn {
  background:#2563eb;
  color:white;
  padding:12px 20px;
  border-radius:10px;
  text-decoration:none;
  display:inline-block;
  transition:0.3s;
}

.btn:hover {
  transform:translateY(-2px);
}

.section {
  padding:80px 0;
}

.hero {
  padding:100px 0;
}

.hero h1 {
  font-size:42px;
  max-width:600px;
}

.hero p {
  margin-top:20px;
  color:#64748b;
}

.grid {
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
  margin-top:40px;
}

.card {
  background:white;
  padding:25px;
  border-radius:12px;
  border:1px solid #e2e8f0;
}

img {
  max-width:100%;
}

footer {
  padding:40px 0;
  text-align:center;
  color:#64748b;
}

/* MOBILE FIRST */
@media(min-width:768px){
  .grid {
    grid-template-columns:repeat(3,1fr);
  }

  .hero-flex {
    display:flex;
    justify-content:space-between;
    align-items:center;
  }

  .hero img {
    max-width:400px;
  }
}