*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body{
    height:100vh;
    background:
      linear-gradient(
        rgba(80, 78, 78, 0.45),
        rgba(122, 121, 121, 0.45)
      ),
      url("bg.jpg") no-repeat center center / cover;
}

.overlay{
    height:100%;
    background:rgba(0,0,0,0.55);
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    position:relative;
}

.container{
    text-align:center;
    color:#fff;
}

.logo{
    width:120px;
    height:120px;
    background:#000000;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    margin:0 auto 20px;
    font-size:20px;
    font-weight:bold;
}

.logo span{
    color:#fff;
}

.logo b{
    color:#ffeb3b;
    margin-left:3px;
}

h1{
    font-size:36px;
    letter-spacing:2px;
    margin-bottom:10px;
}

p{
    font-size:16px;
    opacity:0.9;
    margin-bottom:30px;
}

.whatsapp-btn{
    display:inline-block;
    background:#000000;
    color:#fff;
    padding:15px 30px;
    border-radius:10px;
    font-size:18px;
    text-decoration:none;
    font-weight:bold;
    transition:0.3s;
}

.whatsapp-btn:hover{
    background:#43a047;
    transform:scale(1.05);
}

.footer{
    position:absolute;
    bottom:20px;
    right:20px;
    color:#ccc;
    font-size:12px;
}