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

body{
  background:#f4f4f9;
  color:#333;
  line-height:1.6;
}

header{
  background:#d70000;
  color:white;
  text-align:center;
  padding:12px;
}

.logo{
  width:80px;
  margin-bottom:5px;
}

header h1{
  font-size:18px;
}

main{
  max-width:800px;
  margin:20px auto;
  padding:0 15px;
}

.card{
  background:white;
  padding:15px;
  margin-bottom:18px;
  border-radius:6px;
  box-shadow:0 2px 6px rgba(0,0,0,0.1);
}

h2{
  font-size:16px;
  margin-bottom:10px;
}

h3{
  font-size:14px;
  margin-bottom:6px;
}

p, li{
  font-size:14px;
}

ul{
  padding-left:18px;
  margin-bottom:15px;
}

.section-gap{
  margin-top:25px;
}

select{
  width:100%;
  padding:8px;
  font-size:14px;
  margin-top:6px;
}

.mt-15{
  margin-top:15px;
}

.ukel-btn{
  margin-top:15px;
  width:100%;
  padding:10px;
  background:#1a8f2d;
  color:white;
  border:none;
  border-radius:20px;
  font-size:15px;
  cursor:pointer;
}

.ukel-btn:hover{
  background:#157824;
}

.action-container{
  display:flex;
  gap:10px;
  justify-content:center;
  margin-bottom:20px;
}

.back-btn{
  padding:8px 15px;
  background:#f0ad4e;
  border:none;
  border-radius:20px;
  color:white;
  cursor:pointer;
}

.stop-btn{
  padding:8px 15px;
  background:#d9534f;
  border:none;
  border-radius:20px;
  color:white;
  cursor:pointer;
}

.hidden{
  display:none;
}

@media (max-width:480px){
  header h1{font-size:16px;}
  p, li{font-size:13px;}
  select{font-size:13px;}
}