body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(to right, #111, #333);
    color: #fff;
    margin: 0;
    padding: 0;
    text-align: center;
}
.container {
    max-width: 400px;
    margin: 50px auto;
    padding: 20px;
    background: #222;
    border-radius: 10px;
}
.logo {
    max-width: 180px;
    margin-bottom: 20px;
}
input {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
    border: none;
    border-radius: 5px;
}
button {
    padding: 10px 20px;
    background: #e91e63;
    border: none;
    border-radius: 5px;
    color: white;
    font-weight: bold;
    cursor: pointer;
}
.error {
    color: #ff5252;
    margin-top: 10px;
}
ul {
    list-style: none;
    padding: 0;
}
li {
    margin: 10px 0;
}