body {
    font-family: Arial, sans-serif;
    background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
    margin: 0;
    padding: 0;
}

.container {
    width: 400px;
    margin: 80px auto;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

h2 {
    text-align: center;
    color: #203a43;
}

input {
    width: 95%;
    padding: 10px;
    margin: 8px 0;
    border-radius: 6px;
    border: 1px solid grey;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #2c5364;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background-color: #1c3b4d;
}

.result-pass {
    color: green;
    font-weight: bold;
}

.result-fail {
    color: red;
    font-weight: bold;
}

.nav {
    background: #203a43;
    padding: 15px;
    color: white;
    text-align: center;
}