*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:'Noto Sans Tamil',sans-serif;
}

body{
line-height:1.7;
}

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

header{
background:#006633;
position:sticky;
top:0;
z-index:1000;
}

.nav-container{
display:flex;
justify-content:space-between;
align-items:center;
padding:10px 0;
}

.logo img{
height:70px;
}

nav ul{
display:flex;
list-style:none;
}

nav ul li{
margin-left:25px;
}

nav ul li a{
color:white;
text-decoration:none;
font-weight:600;
}

.menu-btn{
display:none;
color:white;
font-size:28px;
cursor:pointer;
}

.hero{
position:relative;
min-height:100vh;
background:url('images/banner.jpg') center/cover;
display:flex;
justify-content:center;
align-items:center;
text-align:center;
}

.overlay{
position:absolute;
inset:0;
background:rgba(255,255,255,.80);
}

.hero-content{
position:relative;
z-index:2;
padding:20px;
}

.hero-logo{
width:160px;
margin-bottom:15px;
}

.hero h1{
color:#006633;
font-size:48px;
}

.hero h2{
color:#003399;
margin:10px 0;
}

.admission{
color:#d1005c;
font-size:35px;
font-weight:bold;
margin:20px 0;
}

.date-box{
display:inline-block;
background:#fff;
border:2px solid #d1005c;
padding:15px 25px;
border-radius:50px;
font-weight:bold;
margin:20px;
}

.btn{
display:inline-block;
background:#006633;
color:#fff;
padding:15px 35px;
border-radius:30px;
text-decoration:none;
}

section{
padding:70px 0;
}

h2{
text-align:center;
margin-bottom:30px;
color:#006633;
}

.course-grid,
.facility-grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:25px;
}

.course-card,
.facility{
background:#fff;
padding:25px;
border-radius:15px;
box-shadow:0 4px 15px rgba(0,0,0,.1);
text-align:center;
}

.contact{
background:#f4f4f4;
}

.contact-box{
text-align:center;
font-size:20px;
}

footer{
background:#006633;
color:white;
text-align:center;
padding:20px;
}

.whatsapp{
position:fixed;
bottom:20px;
right:20px;
width:60px;
height:60px;
background:#25D366;
color:white;
font-size:30px;
display:flex;
align-items:center;
justify-content:center;
border-radius:50%;
text-decoration:none;
}

@media(max-width:768px){

.menu-btn{
display:block;
}

nav{
display:none;
position:absolute;
top:90px;
left:0;
width:100%;
background:#006633;
}

nav ul{
flex-direction:column;
}

nav ul li{
margin:15px;
}

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

.hero h2{
font-size:22px;
}

.admission{
font-size:24px;
}
}

.show{
display:block !important;
}