registration.css

body {
    font-family: Arial, sans-serif;
    background-color: #f3f3f3;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    background:url(https://i.postimg.cc/4yv7N8t3/bg.jpg);
    background-size: cover;
}

.main {
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
    padding: 20px;
    width: 300px;   
    margin-bottom: 20px;
    background: rgba(0,0,0,0.8);
}

.main h2 {
    margin-bottom: 20px;
    padding: 0 0 20px;
    color: #996600;
    text-align: center;
}

.main p {
    margin: 0;
    padding: 0;
    font-weight: bold;
    color: #fff;

}

input[type="text"], input[type="number"], input[type="email"], input[type="password"], select {
    width: 100%;
    margin-bottom: 15px;
    padding: 10px;
    box-sizing: border-box;
    border: none;
    border-bottom: 1px solid #fff;
    background: transparent;
    outline: none;
    height: 40px;
    color: #fff;
    font-size: 16px;
}

button[type="submit"] {
    padding: 15px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    background: #996600;
    color: #262626;
  }