.header{
  position:fixed;
  top:20px;
  right:0;
  left:0;
  height:70px;
  background:#fff;
  z-index: 9998;
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:0 25px;
  box-shadow:0 2px 15px rgba(0,0,0,0.08);
}

/* صندوق الشعار + العنوان */
.logo-box{
  position: fixed;
  display:flex;
  align-items:center;
  gap:20px;
  left:45%;
}

/* الصورة */
.logo-img{
  width:100px;
  height:100px;
  object-fit:contain;
}

/* العنوان */
.logo{
  margin:0;
  font-size:22px;
  font-weight:700;
  color:#399be6;
  white-space:nowrap;
}

#topBtn{
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  background: #2563eb;
  color: white;
  font-size: 18px;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: 0.3s;
  display:flex;
  align-items:center;
  justify-content:center;
  z-index: 9999;
}

#topBtn i{
  font-size: 20px;
}

#topBtn:hover{
  transform: translateY(-3px) scale(1.05);
  background: #1d4ed8;
}