:root {
    --blu: #1b4e7b;
    --grigio-chiaro: #f2f4f6;
    --grigio-bordo: #e0e0e0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Montserrat', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* HEADER */
.header {
    background: #fff;
    border-bottom: 1px solid var(--grigio-bordo);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--blu);
}

.nav a {
    margin-left: 22px;
    font-size: 15px;
}

/* HERO */
.hero {
    background: linear-gradient(rgba(27,78,123,0.75), rgba(27,78,123,0.75)),
                url("../img/hero.jpg") center/cover no-repeat;
    color: #fff;
    padding: 90px 0;
}

.hero h1 {
    font-size: 38px;
    font-weight: 600;
    margin-bottom: 15px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 25px;
}

.btn {
    display: inline-block;
    background: #fff;
    color: var(--blu);
    padding: 12px 28px;
    font-weight: 600;
}

/* SEZIONI */
.section {
    padding: 70px 0;
}

.section.light {
    background: var(--grigio-chiaro);
}

.section h2 {
    font-size: 30px;
    font-weight: 600;
    color: var(--blu);
    margin-bottom: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background: #fff;
    border: 1px solid var(--grigio-bordo);
    padding: 35px;
}

.card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    margin-bottom: 15px;
}

.card h3 {
    color: var(--blu);
    margin-bottom: 10px;
}

/* FOOTER */
.footer {
    background: var(--blu);
    color: #fff;
    padding: 45px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    g