body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #000;
    color: #fff;
}

.container {
    text-align: center;
    background: #1e1e1e;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
}

h1 {
    margin-bottom: 20px;
    color: #00e676;
}

.password-display {
    font-size: 20px;
    margin-bottom: 20px;
    padding: 10px;
    background: #333;
    border-radius: 4px;
    word-break: break-all;
    color: #00e676;
}

.copy-message {
    display: none;
    margin-bottom: 10px;
    font-size: 16px;
    color: #00e676;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.copy-message.show {
    display: block;
    opacity: 1;
}

.options {
    margin-bottom: 20px;
}

label {
    display: block;
    margin: 5px 0;
    color: #00e676;
}

input[type="range"] {
    width: 100%;
    margin: 10px 0;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: #00e676;
    color: #000;
    transition: background 0.3s, color 0.3s;
}

button:hover {
    background: #00c853;
    color: #fff;
}

.strength-meter {
    margin-top: 20px;
}

.strength-bar {
    height: 10px;
    width: 100%;
    background: #ddd;
    border-radius: 5px;
    margin-bottom: 10px;
    transition: background 0.3s;
}

.strength-message {
    font-size: 14px;
    color: #00e676;
}