:root {
    --primary: #00ff9d;
    --secondary: #00b8ff;
    --accent: #ff00aa;
    --bg: #0f0f1a;
    --text: #ffffff;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--bg);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 0 20px var(--primary), 
                0 0 40px var(--secondary);
    border: 1px solid var(--accent);
}

h1 {
    color: var(--secondary);
    text-align: center;
    border-radius: 1rem;
    padding: 0.5rem 0.5rem;
    margin: 0.5rem 0;
    box-shadow: 0 0 10px var(--secondary);
}

label {
    color: var(--text);
    background-color: transparent;
    font-size: 1.5rem;
    border-radius: 1rem;
    padding: 0.5rem 1rem;
    margin: 0.5rem;
    text-shadow: 0 0 5px var(--primary);
    border: 1px solid var(--secondary);
}

input {
    text-align: center;
    max-width: 5rem;
    border-radius: 1rem;
    font-size: 1.5rem;
    background-color: rgba(0,0,0,0.5);
    color: var(--primary);
    border: 1px solid var(--secondary);
    box-shadow: 0 0 10px var(--primary);
}

button {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    color: var(--bg);
    border: none;
    padding: 0.8rem 1.5rem;
    margin: 0.5rem;
    border-radius: 2rem;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 0 15px var(--primary);
    transition: all 0.3s ease;
}

button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px var(--accent);
}

#passwordGenerado {
    font-family: monospace;
    font-size: 1.8rem;
    margin: 0.8rem 0;
    padding: 0.5rem 1rem;
    background-color: rgba(0,0,0,0.3);
    border-radius: 1rem;
    border: 1px dashed var(--secondary);  
    text-align: center;
    word-break: break-all;
}

input[type="checkbox"] {
    width: 1.7rem;
    height: 1.7rem;
    vertical-align: middle;
    margin-left: 0.5rem;
}