:root{
--primary:#0F766E;
--secondary:#F97316;
--bg:#F8FAFC;
--footer:#134E4A;
}

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

body{
font-family:Arial, Helvetica, sans-serif;
background:var(--bg);
color:#333;
}

/* HEADER */
.top-header{
background:var(--primary);
color:white;
display:flex;
justify-content:space-between;
align-items:center;
padding:12px 20px;
position:sticky;
top:0;
z-index:999;
}

.logo{
display:flex;
align-items:center;
gap:10px;
font-weight:bold;
}

.logo img{
height:50px;
}

nav a{
color:white;
margin-left:20px;
text-decoration:none;
}

nav a:hover{
text-decoration:underline;
}

/* HERO */
.hero{
background:linear-gradient(135deg,#0F766E,#14B8A6);
color:white;
padding:80px 20px;
text-align:center;
}

.hero h1{
font-size:32px;
margin-bottom:10px;
}

/* SECTION */
.section{
max-width:1200px;
margin:auto;
padding:50px 20px;
}

/* ABOUT */
.about-box{
background:white;
padding:40px;
border-radius:10px;
box-shadow:0 5px 20px rgba(0,0,0,0.08);
text-align:center;
border-left:5px solid var(--secondary);
}

/* CARD GRID */
.card-grid{
display:flex;
gap:20px;
flex-wrap:wrap;
margin-top:30px;
}

.card{
background:white;
border-radius:10px;
overflow:hidden;
box-shadow:0 5px 15px rgba(0,0,0,0.08);
width:32%;
transition:0.3s;
border-bottom:3px solid var(--primary);
}

.card img{
width:100%;
height:200px;
object-fit:cover;
}

.card-content{
padding:20px;
}

.card-content h3{
color:var(--primary);
}

/* BUTTON */
.btn{
background:var(--secondary);
color:white;
padding:8px 18px;
border-radius:5px;
text-decoration:none;
display:inline-block;
margin-top:10px;
}

.btn:hover{
background:#ea580c;
}

/* FOOTER */
.footer{
background:var(--footer);
color:white;
margin-top:40px;
}

.footer-container{
max-width:1200px;
margin:auto;
padding:40px 20px;
display:flex;
flex-wrap:wrap;
gap:20px;
}

.footer-col{
width:30%;
}

.footer-bottom{
background:#0b3d3a;
text-align:center;
padding:12px;
}

/* MOBILE */
@media(max-width:768px){

.card{
width:100%;
}

.footer-col{
width:100%;
}

.hero h1{
font-size:24px;
}

}