/* =====================
   PORTFOLIO SECTION - restyling ispirato a servizi.css
   ===================== */
:root {
    --primary: #d32f2f; /* Rosso aziendale */
    --primary-light: #e53935; /* Rosso chiaro per hover */
    --accent: #b71c1c; /* Rosso scuro per enfasi */
    --bg: #f8f9fa; /* Grigio chiaro per sfondi */
    --bg-dark: #ececec; /* Grigio medio per sezioni */
    --text: #181a1b; /* Nero per testi principali */
    --text-light: #6c757d; /* Grigio per testi secondari */
    --white: #fff;
    --black: #181a1b;
    --shadow: 0 2px 16px 0 rgba(30,41,59,0.08);
    --radius: 16px;
    --transition: 0.2s cubic-bezier(.4,0,.2,1);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
    text-align: center;
    padding: 24px 0;
}
.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 22px;
    box-shadow: 0 6px 32px rgba(211,47,47,0.10);
    background: var(--white);
    transition: box-shadow 0.35s, transform 0.25s, border 0.25s;
    border: 2px solid transparent;
}
.portfolio-item:hover {
    box-shadow: 0 16px 48px rgba(211,47,47,0.18);
    transform: translateY(-10px) scale(1.035);
    border: 2px solid var(--primary);
    z-index: 2;
}

.portfolio-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s, filter 0.2s;
    border-radius: 18px 18px 0 0;
}
.portfolio-item .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s;
    padding: 32px 18px 22px 18px;
    font-size: 1.08em;
}
.portfolio-item:hover .overlay {
    opacity: 1;
}
.portfolio-item:hover img {
    transform: scale(1.05);
    filter: brightness(0.95) saturate(1.1);
    filter: blur(4px);
}
.overlay h3 {
    color: var(--white);
    margin-bottom: 10px;
    font-size: 1.8em;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.overlay p {
    font-size: 1.1em;
    margin-bottom: 20px;
    color: var(--white);
}
.view-project {
    color: var(--primary);
    background: var(--white);
    border: 1.5px solid var(--primary);
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 700;
    transition: all 0.3s;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(211,47,47,0.08);
}
.view-project:hover {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    text-decoration: underline;
}

@media (max-width: 900px) {
    .portfolio-grid {
        gap: 28px;
        padding: 10px 0;
    }
    .portfolio-item {
        padding: 0;
    }
}
@media (max-width: 600px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }
    .portfolio-item {
        border-radius: 12px;
    }
    .portfolio-item img {
        border-radius: 12px 12px 0 0;
    }
}