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

body{
    background:linear-gradient(135deg,#0f172a,#1e293b);
    min-height:100vh;
}

.container{
    width:100%;
    max-width:420px;
    margin:auto;
    padding:20px;
}

.top-card{
    text-align:center;
    color:#fff;
    margin-top:30px;
}

.logo{
    width:90px;
    height:90px;
    border-radius:50%;
    background:#fff;
    padding:8px;
    box-shadow:0 10px 30px rgba(0,255,128,.4);
}

.top-card h1{
    margin-top:15px;
    font-size:28px;
    font-weight:700;
}

.top-card p{
    margin-top:8px;
    color:#cbd5e1;
}

.offer-card{
    margin-top:25px;
    background:rgba(255,255,255,.08);
    backdrop-filter:blur(18px);
    border-radius:20px;
    padding:20px;
    box-shadow:0 15px 40px rgba(0,0,0,.35);
}

.banner{
    width:100%;
    border-radius:15px;
    margin-bottom:15px;
}

.offer-card h2{
    color:#fff;
    margin-bottom:8px;
}

.offer-card p{
    color:#cbd5e1;
    margin-bottom:15px;
}

.input-box{
    margin-bottom:15px;
}

.input-box input{
    width:100%;
    height:52px;
    border:none;
    outline:none;
    border-radius:12px;
    padding:0 15px;
    font-size:16px;
}

#submitBtn{
    width:100%;
    height:55px;
    border:none;
    border-radius:12px;
    background:#16a34a;
    color:#fff;
    font-size:18px;
    font-weight:600;
    cursor:pointer;
    transition:.3s;
}

#submitBtn:hover{
    transform:translateY(-2px);
    background:#15803d;
}

.note{
    margin-top:15px;
    text-align:center;
    color:#86efac;
}

#loader{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(15,23,42,.95);
    display:none;
    justify-content:center;
    align-items:center;
    flex-direction:column;
    color:#fff;
}

.spinner{
    width:70px;
    height:70px;
    border:6px solid rgba(255,255,255,.2);
    border-top:6px solid #22c55e;
    border-radius:50%;
    animation:spin 1s linear infinite;
}

@keyframes spin{
    100%{
        transform:rotate(360deg);
    }
}

#loader p{
    margin-top:20px;
    font-size:18px;
}