*{
margin:0;
padding:0;
box-sizing:border-box;
}

body{
font-family:Arial, Helvetica, sans-serif;
background:#f5f7f9;
color:#333;
}

/* container */

.container{
width:90%;
max-width:1200px;
margin:auto;
}

/* topbar */

.topbar{
background:#0f8f8f;
padding:8px 0;
}

.top-links{
text-align:right;
}

.top-links a{
color:white;
text-decoration:none;
margin-left:15px;
font-size:13px;
}

/* header */

header{
background:white;
border-bottom:1px solid #ddd;
}

.header-flex{
display:flex;
justify-content:space-between;
align-items:center;
padding:20px 0;
}

.logo{
font-size:28px;
font-weight:bold;
color:#0f8f8f;
}

.logo span{
color:#333;
}

/* menu */

.menu a{
text-decoration:none;
margin-left:20px;
font-weight:bold;
color:#333;
font-size:14px;
}

.menu a:hover{
color:#0f8f8f;
}

/* hero */

.hero{
background:#0f8f8f;
padding:100px 20px;
text-align:center;
color:white;
}

.hero h1{
font-size:36px;
margin-bottom:10px;
}

.hero p{
margin-bottom:30px;
}

/* search */

.search-bar{
background:white;
display:flex;
max-width:500px;
margin:auto;
border-radius:30px;
overflow:hidden;
}

.search-bar input{
flex:1;
border:none;
padding:15px;
font-size:16px;
outline:none;
}

.search-bar button{
background:#0f8f8f;
border:none;
color:white;
padding:0 25px;
cursor:pointer;
}

/* categories */

.categories{
padding:70px 20px;
text-align:center;
}

.categories h2{
margin-bottom:30px;
}

.grid{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:25px;
max-width:900px;
margin:auto;
}

.grid a{
background:#129797;
color:white;
padding:20px;
text-decoration:none;
border-radius:8px;
font-weight:bold;
}

.grid a:hover{
background:#0c6f6f;
}

/* popular drugs */

.popular{
background:#eaf3f3;
padding:70px 20px;
text-align:center;
}

.drug-grid{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:20px;
max-width:800px;
margin:auto;
}

.drug-grid a{
background:white;
padding:15px;
border-radius:6px;
text-decoration:none;
color:#333;
font-weight:bold;
border:1px solid #ddd;
}

.drug-grid a:hover{
background:#f2f2f2;
}

/* footer */

footer{
background:#222;
color:white;
padding:30px 0;
text-align:center;
margin-top:60px;
}

/* mobile */

@media(max-width:768px){

.header-flex{
flex-direction:column;
}

.menu{
margin-top:10px;
}

.grid{
grid-template-columns:1fr;
}

.drug-grid{
grid-template-columns:1fr;
}

}