*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

body{
  font-family:'Poppins', sans-serif;
  background:#f5f6f8;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* ===== Navbar ===== */

.navbar{
  width:100%;
  padding:20px 30px;
  display:flex;
  align-items:center;
}

.logo{
  display:flex;
  align-items:center;
  gap:12px;
  color:#0B5FA5;
  font-size:20px;
  font-weight:700;
}

.logo i{
  font-size:28px;
}

/* ===== Main ===== */

.main{
  flex:1;
  display:flex;
  justify-content:center;
  align-items:center;
  padding:30px 20px;
}

.content{
  width:100%;
  max-width:500px;
  text-align:center;
}

/* ===== Circle ===== */

.circle{
  width:260px;
  height:260px;
  background:white;
  border-radius:50%;
  margin:0 auto 40px;
  display:flex;
  justify-content:center;
  align-items:center;
  box-shadow:0 10px 30px rgba(0,0,0,0.04);
}

.circle i{
  font-size:120px;
  color:#4A90E2;
}

/* ===== Heading ===== */

h1{
  font-size:64px;
  font-weight:700;
  color:#0057A3;
  margin-bottom:20px;
}

/* ===== Subtitle ===== */

.subtitle{
  font-size:20px;
  color:#444;
  line-height:1.7;
  margin-bottom:50px;
  padding:0 10px;
}

/* ===== Button ===== */

.start-btn{
  display:inline-block;
  width:300px;
  max-width:100%;
  padding:18px;
  background:#005EA6;
  color:white;
  text-decoration:none;
  font-size:24px;
  font-weight:600;
  border-radius:18px;
  transition:0.3s;
}

.start-btn:hover{
  background:#004b86;
}

/* ===== Tablet ===== */

@media(max-width:768px){

  .navbar{
    padding:18px 20px;
  }

  .logo{
    font-size:18px;
  }

  .circle{
    width:200px;
    height:200px;
  }

  .circle i{
    font-size:90px;
  }

  h1{
    font-size:48px;
  }

  .subtitle{
    font-size:17px;
  }

  .start-btn{
    font-size:20px;
    padding:16px;
  }

}

/* ===== Mobile ===== */

@media(max-width:480px){

  .circle{
    width:170px;
    height:170px;
  }

  .circle i{
    font-size:75px;
  }

  h1{
    font-size:40px;
  }

  .subtitle{
    font-size:15px;
    line-height:1.6;
  }

  .start-btn{
    width:100%;
    font-size:18px;
  }

}