*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:'Segoe UI',sans-serif;
}

body{
background:#f5f7fb;
color:#222;
line-height:1.7;
}

/* Container */

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

/* Header */

header{
background:#0f172a;
padding:15px 0;
position:sticky;
top:0;
z-index:999;
box-shadow:0 2px 10px rgba(0,0,0,0.15);
}

header .container{
display:flex;
justify-content:space-between;
align-items:center;
}

.logo-area{
display:flex;
align-items:center;
gap:10px;
}

.logo-area img{
width:50px;
height:50px;
border-radius:50%;
object-fit:cover;
}

.logo-area h1{
font-size:22px;
color:#fff;
font-weight:700;
}

/* Menu Button */

.menu-btn{
font-size:30px;
color:#fff;
cursor:pointer;
}

/* Mobile Menu */

#mobileMenu{
position:fixed;
top:0;
right:-320px;
width:300px;
height:100%;
background:#111827;
padding:25px;
transition:0.4s;
display:flex;
flex-direction:column;
z-index:1000;
}

#mobileMenu.active{
right:0;
}

.close-btn{
font-size:28px;
color:white;
cursor:pointer;
margin-bottom:20px;
text-align:right;
}

#mobileMenu a{
color:white;
text-decoration:none;
padding:12px 0;
border-bottom:1px solid rgba(255,255,255,0.1);
font-size:17px;
}

#mobileMenu a:hover{
color:#38bdf8;
}

/* Hero */

.hero{
padding:30px 15px;
text-align:center;
}

.hero img{
width:100%;
max-width:1000px;
border-radius:20px;
box-shadow:0 10px 30px rgba(0,0,0,0.15);
}

.hero-buttons{
margin-top:25px;
display:flex;
justify-content:center;
gap:15px;
flex-wrap:wrap;
}

.btn{
background:#2563eb;
color:white;
padding:14px 28px;
text-decoration:none;
border-radius:10px;
font-weight:600;
transition:0.3s;
}

.btn:hover{
transform:translateY(-3px);
background:#1d4ed8;
}

/* Refer Box */

.refer-box{
margin-top:30px;
background:white;
padding:25px;
border-radius:15px;
max-width:500px;
margin-left:auto;
margin-right:auto;
box-shadow:0 5px 20px rgba(0,0,0,0.08);
}

.refer-box h2{
margin-bottom:15px;
}

.copy-box{
display:flex;
justify-content:center;
align-items:center;
gap:10px;
flex-wrap:wrap;
}

#referCode{
font-size:24px;
font-weight:bold;
color:#2563eb;
}

.copy-box button{
background:#10b981;
border:none;
padding:12px 25px;
color:white;
cursor:pointer;
border-radius:8px;
font-weight:600;
}

.copy-box button:hover{
background:#059669;
}

/* Content */

.content{
width:90%;
max-width:1100px;
margin:50px auto;
background:white;
padding:40px;
border-radius:15px;
box-shadow:0 5px 25px rgba(0,0,0,0.08);
}

.content h2{
margin-top:30px;
margin-bottom:12px;
color:#0f172a;
font-size:28px;
}

.content p{
margin-bottom:18px;
font-size:17px;
}

.content ul{
padding-left:20px;
margin-bottom:20px;
}

.content li{
margin-bottom:10px;
}

/* Footer */

footer{
background:#0f172a;
color:white;
margin-top:50px;
}

.footer-container{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:30px;
padding:50px 10%;
}

.footer-box h3{
margin-bottom:15px;
color:#38bdf8;
}

.footer-box a{
display:block;
color:white;
text-decoration:none;
margin-bottom:10px;
transition:0.3s;
}

.footer-box a:hover{
color:#38bdf8;
padding-left:5px;
}

.copyright{
text-align:center;
padding:20px;
border-top:1px solid rgba(255,255,255,0.1);
font-size:14px;
}

/* Responsive */

@media(max-width:768px){

.logo-area h1{
font-size:18px;
}

.content{
padding:25px;
}

.content h2{
font-size:24px;
}

.btn{
width:100%;
max-width:280px;
}

.hero-buttons{
flex-direction:column;
align-items:center;
}

}

@media(max-width:480px){

.logo-area img{
width:42px;
height:42px;
}

.logo-area h1{
font-size:16px;
}

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

.content p{
font-size:16px;
}

}