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

body {
    background: linear-gradient(135deg, #0a1931, #16213e, #1b1e3f);
    color: #fff;
    text-align: center;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 600px;
    background: rgba(10, 25, 49, 0.9);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.5s ease-in-out;
    border: 2px solid #0f3460;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    font-size: 28px;
    color: #00a6ff;
    margin-bottom: 20px;
}

p {
    font-size: 18px;
    margin-bottom: 15px;
}

form {
    margin-top: 15px;
}

input[type="text"],
input[type="email"] ,
input[type="password"] {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 2px solid #00a6ff;
    border-radius: 5px;
    background: #0f3460;
    color: #fff;
    font-size: 16px;
}

button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border: none;
    border-radius: 5px;
    background: #00a6ff;
    color: #000;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s ease;
}

button:hover {
    background: #00c3ff;
    transform: scale(1.05);
}

.question {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 15px;
}

.answers label {
    display: block;
    background: #1b1e3f;
    padding: 12px;
    border-radius: 6px;
    margin: 5px 0;
    cursor: pointer;
    transition: 0.3s ease;
    border: 2px solid transparent;
}

.answers input {
    display: none;
}

.answers label:hover {
    background: #16213e;
}

.answers input:checked + label {
    background: #00a6ff;
    color: black;
    font-weight: bold;
    border: 2px solid #fff;
}

.error {
    color: #ff4c4c;
    font-weight: bold;
    margin-top: 10px;
}

footer {
    margin-top: 20px;
    font-size: 14px;
    color: #ddd;
    text-align: center;
}