body {
    font-family: Arial, sans-serif;
    background-color: #1e1e1e;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #2c2c2c;
    padding: 20px;
    border-radius: 10px;
    width: 360px;
    box-shadow: 0 0 15px rgba(0,0,0,0.5);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.generator {
    display: flex;
    margin-bottom: 20px;
}

#password {
    flex: 1;
    padding: 10px;
    font-size: 16px;
    border: none;
    border-radius: 5px 0 0 5px;
}

#generate {
    padding: 10px 20px;
    background-color: #4caf50;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 0 5px 5px 0;
    font-weight: bold;
}

#generate:hover {
    background-color: #45a049;
}

.options label {
    display: block;
    margin-bottom: 10px;
    cursor: pointer;
    font-size: 14px;
}

.options input[type=checkbox], .options input[type=number] {
    margin-right: 10px;
}

.strength {
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
}

#strength-result {
    color: #ffb400;
}

.copy-message {
    display: none;
    background-color: #4caf50;
    padding: 10px;
    margin-top: 10px;
    text-align: center;
    border-radius: 5px;
    font-weight: bold;
}