body {
    font-family: 'Segoe UI', sans-serif;
  background: -moz-linear-gradient(left, #0072ff, #00c6ff);
  background: -webkit-linear-gradient(left, #0072ff, #00c6ff);
  background: -o-linear-gradient(left, #0072ff, #00c6ff);
  background: linear-gradient(left, #0072ff, #00c6ff);
    color: #fff;
}
.container {
    width: 520px;
    margin: 60px auto;
    background: #111;
    padding: 30px;
    border-radius: 12px;
}
input, button {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border-radius: 6px;
    border: none;
}
input { background:#222; color:#fff; }
.dropzone {
    border: 2px dashed #555;
    padding: 20px;
    text-align: center;
    cursor: pointer;
}
button { background: gold; color: black; font-weight: bold; }