body{
font-family:Arial,Helvetica,sans-serif;
margin:0;
background:#f4f6f8;
color:#222;
}
header{
background:#0d3b66;
color:white;
padding:20px;
}
header h1{
margin:0;
font-size:26px;
}
nav a{
color:white;
margin-right:15px;
text-decoration:none;
font-weight:bold;
}
.container{
max-width:1000px;
margin:auto;
padding:30px;
margin-top:20px;
box-shadow:0 0 10px rgba(0,0,0,0.1);
}
h1,h2{color: #D81324 !important;}
ul{
line-height:1.8;
}
.codebox{background:#eef2f7;padding:15px;border-left: 5px solid #D81324;margin:20px 0;font-weight:bold;}

.accordion-header{background:#eef2f7;padding:15px;border-left: 5px solid #D81324;margin:20px 0;font-weight:bold;overflow:hidden; cursor:pointer;
    display:flex;
    justify-content:space-between;
    align-items:center;}
.accordion-content {
    display:none;
    padding:15px;
    line-height:1.6;
}
.accordion.active .accordion-content {display:block;}

.icon {
    transition:0.3s;
    font-size:18px;
}

.accordion.active .icon {
    transform:rotate(45deg); /* + → x dönüşür */
}