body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    flex-direction: column;
    text-align: center;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 450px;
    text-align: center;
}

.logo {
    width: 200px;
    margin-bottom: 20px;
}

h2 {
    color: #333;
    margin-bottom: 15px;
}

input[type="text"], textarea {
    width: calc(100% - 20px);
    padding: 10px;
    margin: 5px 0;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
    text-align: center;
    background-color: #f8f9fa;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease;
    margin-top: 10px;
}

button:hover {
    background-color: #0056b3;
}

.link-box, .pin-box {
    margin-top: 10px;
    padding: 12px;
    background: #e9ecef;
    border-radius: 6px;
    font-size: 16px;
}

.secret-box {
    margin-top: 20px;
    padding: 15px;
    background: #d4edda;
    border-radius: 6px;
    font-size: 16px;
    color: #155724;
}

.error-box {
    margin-top: 20px;
    padding: 20px;
    background: #f8d7da;
    border-radius: 6px;
    font-size: 18px;
    color: #721c24;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
    font-weight: bold;
    max-width: 450px;
}