body {
    font-family: Arial, sans-serif;
    background-color: #f6f6f6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 500px;
    margin: 50px auto;
    padding: 20px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(200, 0, 0, 0.2);
}

header {
    text-align: center;
    margin-bottom: 20px;
}

.logo {
    max-width: 80px;
    margin-bottom: 10px;
}

h1 {
    margin: 0;
    color: #b30000;
}

.subtitle {
    font-size: 0.9em;
    color: #666;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    font-weight: bold;
    margin-top: 10px;
}

input[type="text"],
input[type="password"] {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-top: 5px;
    font-size: 1em;
}

.decrypt-button {
    margin-top: 20px;
    padding: 12px;
    background-color: #b30000;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    cursor: pointer;
}

.decrypt-button:hover {
    background-color: #990000;
}

footer {
    text-align: center;
    font-size: 0.8em;
    color: #aaa;
    margin-top: 20px;
}