* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f5f5f5;
    color: #333;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
}

main {
    padding: 1rem;
}

.ocultar {
    display: none;
}

.desabilitar {
    pointer-events: none;
    opacity: 0.6;
    background-color: #eee;
    color: #555;
}