:root{
–bg:#fafafa;
–card:#ffffff;
–text:#222;
–brand:#0d6efd;
–accent:#198754;
–muted:#6c757d;
–shadow:0 6px 20px rgba(0,0,0,.08);
–radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
font-family:”Cairo”,”Tahoma”,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
background:var(–bg);
color:var(–text);
line-height:1.9;
font-size:18px;
}
.container{
max-width:900px;
margin:42px auto;
padding:0 16px;
}
article{
background:var(–card);
border-radius:var(–radius);
box-shadow:var(–shadow);
padding:28px;
}
h1,h2,h3{
margin:0 0 14px 0;
line-height:1.3;
}
h1{
font-size:28px;
color:var(–brand);
text-align:center;
margin-bottom:18px;
}
h2{
font-size:23px;
color:var(–brand);
border-right:5px solid var(–brand);
padding-right:10px;
margin-top:26px;
}
h3{
font-size:20px;
color:var(–accent);
margin-top:18px;
}
p{margin:0 0 14px 0;text-align:justify}
.lead{
font-weight:600;
color:#111;
}
.toc{
background:#f0f7ff;
border-radius:12px;
padding:14px 16px;
margin:12px 0 22px 0;
box-shadow:var(–shadow);
}
.toc h3{margin:0 0 8px 0;color:var(–brand)}
.toc a{
display:block;
text-decoration:none;
color:#0b5ed7;
padding:6px 4px;
}
.note{
background:#fff8e6;
border:1px solid #ffe8b3;
border-radius:10px;
padding:12px 14px;
margin:16px 0;
color:#7a5a00;
}
ul{padding:0 22px;margin:12px 0}
li{margin:6px 0}
footer{
margin-top:22px;
color:var(–muted);
font-size:15px;
text-align:center;
}
@media (min-width: 768px){
h1{font-size:30px}
h2{font-size:24px}
h3{font-size:21px}
body{font-size:19px}
}