*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family: 'Segoe UI', sans-serif;
}

body{
  color:#222;
  line-height:1.6;
}

header{
  position:sticky;
  top:0;
  background:#fff;
  z-index:1000;
  box-shadow:0 4px 20px rgba(0,0,0,.08);
}

nav{
  max-width:1200px;
  margin:auto;
  padding:15px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

nav h1{
  font-size:22px;
  color:#007bff;
}

nav ul{
  list-style:none;
  display:flex;
  gap:25px;
}

nav ul li a{
  text-decoration:none;
  color:#222;
  font-weight:600;
}

nav ul li a.active{
  color:#007bff;
}

.btn{
  background:#007bff;
  color:#fff;
  padding:10px 18px;
  border-radius:6px;
  text-decoration:none;
  font-weight:600;
}

.btn-outline{
  border:2px solid #007bff;
  color:#007bff;
  padding:8px 16px;
  border-radius:6px;
  text-decoration:none;
}

.hamburger{
  display:none;
  flex-direction:column;
  gap:5px;
  cursor:pointer;
}

.hamburger span{
  width:26px;
  height:3px;
  background:#000;
}

footer{
  background:#111;
  color:#fff;
  text-align:center;
  padding:20px;
  margin-top:80px;
}

@media(max-width:768px){
  nav ul{
    position:absolute;
    top:70px;
    left:0;
    width:100%;
    background:#fff;
    flex-direction:column;
    display:none;
    box-shadow:0 10px 30px rgba(0,0,0,.2);
  }

  nav ul.show{
    display:flex;
  }

  nav ul li{
    padding:15px;
  }

  .hamburger{
    display:flex;
  }
}