body{
background:#edf2ff;
font-family:Arial;
}

.container{
max-width:1000px;
margin:auto;
padding:30px;
}

.card{
background:white;
padding:30px;
border-radius:20px;
box-shadow:0 0 20px rgba(0,0,0,0.1);
}

.factor{
display:inline-block;
padding:10px 15px;
background:#dbeafe;
border-radius:12px;
margin:5px;
font-size:24px;
}

.crossed{
opacity:0.3;
text-decoration:line-through;
}

.choice{
display:block;
padding:10px;
margin:5px;
background:#f3f4f6;
border-radius:10px;
}

.rowbox{
margin:20px 0;
font-size:24px;
}

.split{
display:grid;
grid-template-columns:1fr 1fr;
gap:30px;
}

button,.btn{
background:#2563eb;
color:white;
border:none;
padding:12px 20px;
border-radius:12px;
text-decoration:none;
cursor:pointer;
}

.gray{
background:#6b7280;
}

.error{
background:#fee2e2;
padding:15px;
border-radius:12px;
margin:15px 0;
}


h1{
font-size:48px;
margin-bottom:30px;
color:#1d4ed8;
}

h2{
font-size:34px;
}

h3{
font-size:28px;
margin-bottom:15px;
}

.factor{
display:inline-block;
padding:18px 28px;
background:#bfdbfe;
border-radius:18px;
margin:8px;
font-size:38px;
font-weight:bold;
border:3px solid #60a5fa;
}

.rowbox{
margin:35px 0;
font-size:38px;
}

.choice{
display:block;
padding:18px;
margin:10px 0;
background:#f3f4f6;
border-radius:16px;
font-size:30px;
}

.choice input{
transform:scale(1.5);
margin-right:12px;
}

select{
font-size:28px;
padding:10px;
border-radius:12px;
margin-bottom:20px;
}

button,.btn{
font-size:26px;
padding:16px 26px;
margin-top:10px;
}

.stack{
display:flex;
flex-direction:column;
gap:35px;
}

.block{
background:#f8fafc;
padding:20px;
border-radius:18px;
}

.card{
padding:45px;
}

.error{
font-size:24px;
}



.double-layout{
display:grid;
grid-template-columns:1fr 1fr;
gap:35px;
margin-top:25px;
}

.block{
background:#f8fafc;
padding:25px;
border-radius:20px;
border:2px solid #dbeafe;
}

.block button{
margin-top:15px;
}

@media(max-width:900px){
.double-layout{
grid-template-columns:1fr;
}
}
input[type="number"]{
font-size:36px;
padding:18px;
width:220px;
border-radius:16px;
border:3px solid #60a5fa;
}

button,.btn{
font-size:32px;
padding:18px 30px;
}

.factor{
font-size:44px;
padding:20px 30px;
}
.custom-box{
    background:#eef4ff;
    padding:20px;
    border-radius:15px;
    margin-bottom:25px;
    text-align:center;
}

.custom-box input{
    padding:12px;
    width:150px;
    font-size:20px;
    margin:10px;
}

.custom-box button{
    padding:12px 20px;
    font-size:18px;
}

.big-link{
    display:inline-block;
    margin-top:20px;
    font-size:28px;
    text-decoration:none;
    background:#2563eb;
    color:white;
    padding:15px 30px;
    border-radius:15px;
}

.custom-box{
    background:#eef4ff;
    padding:30px;
    border-radius:20px;
    margin-bottom:30px;
    text-align:center;
}

.custom-form{
    display:flex;
    justify-content:center;
    align-items:center;
    gap:15px;
    flex-wrap:wrap;
}

.custom-input{
    padding:15px;
    width:220px;
    font-size:24px;
    border-radius:12px;
    border:2px solid #4f8cff;
}

.custom-button{
    padding:15px 25px;
    font-size:22px;
    border:none;
    border-radius:12px;
    background:#2563eb;
    color:white;
    cursor:pointer;
}