/* Reset e base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #1e3c72, #2a5298);
    color: #fff;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 90%;
    max-width: 600px;
    background-color: rgba(0, 0, 0, 0.6);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    text-align: center;
}

header h1 {
    font-size: 2em;
    margin-bottom: 20px;
}

.istruzioni {
    margin-bottom: 20px;
    font-size: 1.1em;
    line-height: 1.4;
}

.conversione-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.binario-display {
    font-size: 1.5em;
    font-weight: bold;
    background-color: #222;
    padding: 10px 15px;
    border-radius: 8px;
    border: 2px solid #fff;
}

.uguale {
    font-size: 1.5em;
}

input[type="number"] {
    padding: 10px;
    font-size: 1em;
    border-radius: 8px;
    border: none;
    outline: none;
    width: 150px;
}

#Invio {
    padding: 10px 20px;
    background-color: #00b894;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: background 0.3s ease;
}

#Invio:hover {
    background-color: #019875;
}

.risultato {
    margin-top: 15px;
    font-size: 1.2em;
    font-weight: bold;
}

footer {
    margin-top: 30px;
    font-size: 0.9em;
    color: #ccc;
}