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

body{
  background:#f7f9fc;
  color:#333;
}

/* HEADER */
header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:15px 20px;
  background:#ffffff;
  box-shadow:0 2px 5px rgba(0,0,0,0.05);
  position:sticky;
  top:0;
  z-index:1000;
}

.logo{
  font-size:22px;
  font-weight:bold;
  color:#1e88e5;
}

.hamburger{
  font-size:26px;
  cursor:pointer;
}

/* OVERLAY */
.overlay{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:100%;
  background:rgba(0,0,0,0.4);
  opacity:0;
  visibility:hidden;
  transition:0.3s;
  z-index:998;
}

.overlay.active{
  opacity:1;
  visibility:visible;
}

/* SIDE MENU */
.side-menu{
  position:fixed;
  top:0;
  left:-260px;
  width:260px;
  height:100%;
  background:#ffffff;
  box-shadow:2px 0 10px rgba(0,0,0,0.1);
  transition:0.3s;
  z-index:999;
  padding:20px;
}

.side-menu.active{
  left:0;
}

/* MENU HEADER */
.menu-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:20px;
}

.menu-close{
  background:none;
  border:none;
  font-size:26px;
  cursor:pointer;
}

/* MENU LINKS */
.side-menu ul{
  list-style:none;
}

.side-menu ul li{
  margin-bottom:15px;
}

.side-menu ul li a{
  text-decoration:none;
  font-size:18px;
  color:#333;
  display:block;
}

.side-menu ul li a:hover{
  color:#1e88e5;
}

/* CONTENT */
.content{
  padding:25px;
}

.content h1{
  margin-bottom:15px;
  font-size:26px;
}

.content p{
  margin-bottom:10px;
  line-height:1.6;
}

/* INFO BOX */
.info-box{
  background:#ffffff;
  padding:15px;
  margin-bottom:15px;
  border-radius:6px;
  box-shadow:0 2px 6px rgba(0,0,0,0.05);
}

/* FOOTER */
footer{
  text-align:center;
  padding:20px;
  background:#ffffff;
  margin-top:40px;
  font-size:14px;
  color:#666;
}

/* DESKTOP */
@media(min-width:768px){
  .hamburger{
    display:none;
  }

  .side-menu{
    position:static;
    width:auto;
    height:auto;
    box-shadow:none;
    padding:0;
    left:0;
  }

  .side-menu ul{
    display:flex;
    gap:20px;
  }

  .menu-header,
  .overlay{
    display:none;
  }
}