/* RESET E BASI */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #ffffff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

/* NAVIGAZIONE */
nav {
    margin-bottom: 20px;
}

nav a {
    color: #007bff;
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    transition: color 0.2s;
}

nav a:hover {
    color: #0056b3;
}

/* TITOLI */
h1 {
    color: #1a202c;
    font-size: 2.2rem;
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

p {
    margin-bottom: 25px;
    color: #4a5568;
}

/* BOX CALCOLATORE (naspi-app) */
#naspi-app {
    background: #f1f5f9 !important; /* Grigio chiarissimo professionale */
    border: 1px solid #e2e8f0;
    padding: 30px !important;
    border-radius: 12px !important;
}

/* INPUT E BOTTONI */
input[type="number"] {
    border: 2px solid #cbd5e0 !important;
    transition: border-color 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: #007bff !important;
}

button {
    background-color: #007bff !important;
    transition: transform 0.1s, background-color 0.2s !important;
}

button:hover {
    background-color: #0056b3 !important;
}

button:active {
    transform: scale(0.98);
}

/* FOOTER E DISCLAIMER */
footer {
    border-top: 1px solid #e2e8f0 !important;
    margin-top: 40px !important;
    padding-top: 25px !important;
    color: #718096 !important;
}

footer strong {
    color: #2d3748;
}

/* MOBILE OPTIMIZATION */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }
    h1 {
        font-size: 1.8rem;
    }
}