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

body{
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    background:#0a0a0a;
    color:white;
    overflow:hidden;
    position:relative;
}

/* 🌌 particles */
#particles{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    z-index:0;
    pointer-events:none;
}

/* 🧊 container */
.container{
    position:relative;
    z-index:1;

    width:360px;
    padding:25px;
    border-radius:20px;

    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(15px);

    border:1px solid rgba(0,255,204,0.15);
    box-shadow:0 0 25px rgba(0,255,204,0.1);

    text-align:center;
}

h1{
    color:#00ffcc;
    margin-bottom:10px;
}

input{
    width:100%;
    padding:12px;
    margin:8px 0;
    border-radius:12px;
    border:none;
    background:#1a1a1a;
    color:white;
}

input:focus{
    outline:2px solid #00ffcc;
}

button{
    width:100%;
    padding:12px;
    margin-top:10px;
    border:none;
    border-radius:12px;
    background:linear-gradient(135deg,#00ffcc,#00aaff);
    color:black;
    font-weight:bold;
    cursor:pointer;
}

#qrcode{
    margin-top:15px;
}

#history{
    font-size:12px;
    color:#aaa;
    text-align:left;
    margin-top:10px;
}

.footer{
    margin-top:10px;
    font-size:12px;
    color:#888;
}