:root {
    --primary:#7b2ff7;
    --bg-light:#f4f6fb;
    --bg-dark:#121212;
    --card-light:#ffffff;
    --card-dark:#1e1e1e;
    --text-light:#111;
    --text-dark:#fff;
}

body{
    margin:0;
    font-family:'Poppins',sans-serif;
    background:var(--bg-light);
    color:var(--text-light);
    transition:0.4s ease;
}

body.dark{
    background:var(--bg-dark);
    color:var(--text-dark);
}

header{
    text-align:center;
    padding:20px;
    font-size:26px;
    font-weight:700;
}

.logo{
    color:var(--primary);
}

.theme-toggle{
    position:absolute;
    right:15px;
    top:50px;
    cursor:pointer;
    padding:8px 15px;
    border-radius:20px;
    background:var(--primary);
    color:#fff;
    font-size:13px;
}

.container{
    max-width:700px;
    margin:auto;
    padding:20px;
}

.card{
    background:var(--card-light);
    padding:25px;
    border-radius:15px;
    box-shadow:0 10px 30px rgba(0,0,0,0.1);
    transition:0.4s ease;
    animation:fadeIn 0.8s ease;
}

body.dark .card{
    background:var(--card-dark);
}

@keyframes fadeIn{
    from{opacity:0; transform:translateY(20px);}
    to{opacity:1; transform:translateY(0);}
}

input, select{
    width:100%;
    padding:12px;
    margin-top:8px;
    margin-bottom:18px;
    border-radius:8px;
    border:1px solid #ccc;
    font-size:14px;
}

label{
    font-weight:500;
}

.methods{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
}

.method{
    flex:1 1 48%;
    border:2px solid #ccc;
    padding:10px;
    border-radius:10px;
    cursor:pointer;
    text-align:center;
    transition:0.3s;
}

.method img{
    width:40px;
    height:40px;
    object-fit:contain;
    display:block;
    margin:auto;
}

.method.active{
    border-color:var(--primary);
    background:rgba(123,47,247,0.1);
}

button{
    width:100%;
    padding:14px;
    background:var(--primary);
    color:#fff;
    border:none;
    border-radius:10px;
    font-size:16px;
    font-weight:600;
    cursor:pointer;
}

.warning{
    color:red;
    font-size:14px;
    margin-top:-15px;
    margin-bottom:15px;
}

.footer-note{
    text-align:center;
    font-size:13px;
    margin-top:15px;
    opacity:0.7;
}