:root {
    /* Palette colori e variabili */
    --primary-blue: #1a365d;
    --secondary-blue: #2a528a;
    --whatsapp-green: #25D366;
    --whatsapp-hover: #1ebd5a;
    --bg-light: #f4f7f6;
    --text-dark: #2d3748;
    
    /* Ombre moderne stratificate */
    --shadow-sm: 0 4px 6px -1px rgba(26, 54, 93, 0.05), 0 2px 4px -1px rgba(26, 54, 93, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(26, 54, 93, 0.1), 0 4px 6px -2px rgba(26, 54, 93, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(26, 54, 93, 0.15), 0 10px 10px -5px rgba(26, 54, 93, 0.04);
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Effetto Glass sulla Navbar */
.blur-navbar {
    background-color: rgba(255, 255, 255, 0.9) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar-brand, .text-primary-blue {
    color: var(--primary-blue) !important;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.bg-primary-blue {
    background-color: var(--primary-blue) !important;
}

/* Hero Section (riportata allo stile semplice senza immagine) */
.hero-section {
    padding: clamp(4rem, 10vw, 6rem) 0 clamp(3rem, 8vw, 4rem) 0;
    position: relative;
}

/* Sezione Loghi */
.logos-section {
    background-color: rgba(255, 255, 255, 0.95);
    padding: clamp(1.5rem, 4vw, 2.5rem) 0;
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 10;
}

.partner-logo {
    max-height: clamp(50px, 6vw, 70px);
    object-fit: contain;
    filter: grayscale(20%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), filter 0.4s;
}

.partner-logo:hover {
    transform: scale(1.1);
    filter: grayscale(0%);
}

/* Card Servizi */
.service-card {
    background: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card-header-icon {
    font-size: clamp(2.5rem, 4vw, 3.2rem);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    background-clip: text; /* Versione standard universale */
    -webkit-background-clip: text; /* Versione per Chrome/Safari/Edge */
    color: transparent; /* Standard per nascondere il colore del testo */
    -webkit-text-fill-color: transparent; /* Supporto retroattivo per WebKit */
    margin-bottom: 1rem;
    display: inline-block;
}

/* Pulsanti */
.whatsapp-btn {
    background: linear-gradient(135deg, var(--whatsapp-green) 0%, var(--whatsapp-hover) 100%);
    color: white;
    font-weight: 700;
    border-radius: 50px;
    padding: clamp(10px, 2vw, 14px) clamp(20px, 4vw, 35px);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
    transition: all 0.3s ease;
}

.whatsapp-btn:hover, .btn-success:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
    color: white;
}

.whatsapp-btn:active, .btn-success:active {
    transform: translateY(1px);
}

/* Liste e Tipografia interna */
.list-group-item {
    background-color: transparent;
    border-color: rgba(26, 54, 93, 0.08);
    padding: 1rem 1.25rem;
    color: var(--text-dark);
    transition: background-color 0.2s ease, padding-left 0.2s ease;
}

.list-group-item:hover {
    background-color: rgba(26, 54, 93, 0.02);
    padding-left: 1.5rem;
}

footer a:hover {
    color: #2a528a !important; /* Richiama il blu del sito */
    border-color: #2a528a !important;
}

/* --- OTTIMIZZAZIONE RESPONSIVE --- */

/* Per dispositivi mobili piccoli */
@media (max-width: 576px) {
    .hero-section {
        padding: 3rem 0;
    }
    .hero-section h1 {
        font-size: 2rem !important;
    }
    .card.service-card {
        margin: 0 10px;
    }
}

/* Tablet e schermi medi */
@media (max-width: 991px) {
    .navbar-collapse {
        background: white;
        padding: 15px;
        border-radius: 10px;
        box-shadow: var(--shadow-md);
        margin-top: 10px;
    }
    .hero-section {
        padding: 4rem 0;
    }
}

/* Desktop e schermi grandi */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
    .service-card {
        padding: 2.5rem !important; /* Più respiro nelle card su desktop */
    }
}

/* Micro-aggiustamento per le icone dei servizi */
@media (max-width: 768px) {
    .card-header-icon {
        font-size: 2.5rem;
    }
    #contatti .ratio {
        margin-top: 2rem;
    }
}