*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    scroll-behavior:smooth;
  }
  
  body{
    font-family:'Orbitron',sans-serif;
    background:#000;
    color:#fff;
    line-height:1.6;
  }
  
  header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:15px 40px;
    background:rgba(0,0,0,0.9);
    border-bottom:1px solid #0f0;
  }
  header .logo {
    text-decoration: none;
    color: #00FF00;
  }
  
  
  .logo{
    display:flex;
    align-items:center;
    gap:10px;
  }
  
  .logo img{
    width:40px;
  }
  
  .logo span{
    color:#0f0;
    font-weight:bold;
  }
  
  nav a{
    margin-left:20px;
    text-decoration:none;
    color:#fff;
  }
  
  nav a:hover{
    color:#0f0;
  }
  
  section{
    padding:80px 20px;
    text-align:center;
  }
  
  h1,h2,h3{
    color:#0f0;
    margin-bottom:20px;
  }
  
  p{
    max-width:700px;
    margin:10px auto;
  }
  
  .btn{
    padding:10px 20px;
    border:2px solid #0f0;
    color:#0f0;
    text-decoration:none;
  }
  
  .btn:hover{
    background:#0f0;
    color:#000;
  }
  
  /* services */
  .services{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
    padding:40px;
  }

@media (max-width:768px){
.desktop-menu { display: none; }
.mobile-menu-icon { display: block; }
}
  
  .card{
    background:#111;
    padding:20px;
    border:1px solid #0f0;
  }
  /* Mobile / tablet responsive */
.mobile-menu { display: none; flex-direction: column; gap: 15px; background: #000; padding: 15px; border: 1px solid #0f0; position: absolute; top: 70px; right: 15px; }
.mobile-menu a { color: #0f0; text-decoration: none; font-family: 'Orbitron', sans-serif; }
.mobile-menu-icon { display: none; cursor: pointer; font-size: 24px; color:#0f0; }


@media (max-width:768px){
.desktop-menu { display: none; }
.mobile-menu-icon { display: block; }
}
  
  /* contact form */
  .contact-form{
    max-width:500px;
    margin:auto;
  }
  
  .contact-form input,
  .contact-form textarea{
    width:100%;
    padding:10px;
    margin:10px 0;
    background:#111;
    border:1px solid #0f0;
    color:#fff;
  }
  
  /* footer */
  footer{
    text-align:center;
    padding:20px;
    border-top:1px solid #0f0;
  }
  footer a {
    text-decoration: none; /* underline remove করবে */
    color: #0f0;           /* neon green color */
  }
  
  footer a:hover {
    color: #00ffff;         /* hover effect optional */
  }
  
  
  .social a{
    margin:0 10px;
    color:#0f0;
    font-size:20px;
  }