/* 1. VARIABILI E BASE - LIGHT MODE CON COLORI LOGO */
:root {
  --primary: #1b2a53;       /* Blu navy scuro del logo (auto e ingranaggi) */
  --primary-dark: #020a1c;  /* Versione più scura per gli hover */
  --accent: #a30b0b;        /* Rosso scuro del logo (scritta DI.P.A.) */
  --bg: #e5e5e5;            /* Sfondo generale grigio neutro scuro */
  --surface: #ffffff;       /* Bianco puro per le card */
  --text: #072143;          /* Testo principale grigio scuro neutro */
  --text-light: #0e1b6397;    /* Testo secondario */
  --border: #d4d4d4;        
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* 2. NAVIGATION */
nav {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  padding: 20px 0; transition: var(--transition);
}

nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}

/* PROPORZIONI E GESTIONE LOGO PNG */
.logo { 
  display: flex;
  align-items: center;
}
.logo img {
  height: 50px; /* Altezza fissa leggermente aumentata per far leggere bene il PNG */
  width: auto;  
  max-width: 100%;
  object-fit: contain; /* Previene la deformazione dei file raster come i PNG */
}

.nav-links { display: flex; list-style: none; gap: 10px; }
.nav-links a {
  padding: 8px 16px; font-size: 0.9rem; font-weight: 600;
  text-decoration: none; color: var(--text-light); border-radius: 50px;
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { 
    color: var(--primary); 
    background: rgba(5, 22, 56, 0.05); /* Effetto hover basato sul blu del logo */
}

.nav-actions { display: flex; align-items: center; gap: 15px; }

.nav-cta {
  background: var(--primary); color: var(--surface); padding: 10px 22px;
  border-radius: 50px; font-size: 0.85rem; font-weight: 600;
  text-decoration: none; transition: var(--transition);
}
.nav-cta:hover { background: var(--primary-dark); }

/* HAMBURGER MENU */
.hamburger {
  display: none; width: 30px; height: 20px;
  flex-direction: column; justify-content: space-between;
  background: none; border: none; cursor: pointer; z-index: 1001;
}

.hamburger span {
  width: 100%; height: 3px; background: var(--primary);
  border-radius: 4px; transition: var(--transition);
}

/* 3. HERO */
#home {
  min-height: 100vh; display: flex; align-items: center;
  padding: 120px 24px 60px;
  background: radial-gradient(circle at 90% 10%, #f5f5f5 0%, var(--bg) 100%);
}

.hero-content {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 60px; align-items: center;
}

.hero-title { 
  font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; 
  line-height: 1.1; margin-bottom: 24px; color: var(--primary);
}
.hero-title span { color: var(--accent); } /* La scritta "Milano" ora richiama il rosso del logo */

.hero-tag {
  background: var(--surface); color: var(--accent); display: inline-block;
  padding: 6px 14px; border-radius: 50px; font-size: 0.75rem;
  font-weight: 700; text-transform: uppercase; margin-bottom: 24px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
}

.hero-desc { font-size: 1.1rem; color: var(--text-light); margin-bottom: 32px; max-width: 500px; }
.hero-btns { display: flex; gap: 16px; }

.btn-primary {
  background: var(--primary); color: var(--surface); padding: 16px 32px;
  border-radius: var(--radius-md); font-weight: 700; text-decoration: none; transition: var(--transition);
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-ghost {
  background: var(--surface); border: 1px solid var(--border); color: var(--primary);
  padding: 16px 32px; border-radius: var(--radius-md); font-weight: 700; text-decoration: none;
  transition: var(--transition);
}
.btn-ghost:hover { background: #f0f0f0; }

.glass-card {
  background: rgba(255, 255, 255, 0.8); backdrop-filter: blur(10px);
  padding: 30px; border-radius: var(--radius-lg); border: 1px solid var(--surface);
  box-shadow: var(--shadow); margin-bottom: 20px;
}
.notice-card { border-left: 5px solid var(--accent); }
.badge { background: var(--accent); color: var(--surface); padding: 4px 8px; border-radius: 5px; font-size: 0.65rem; font-weight: 800; margin-bottom: 10px; display: inline-block;}

/* 4. SERVIZI */
section { padding: 100px 24px; max-width: 1200px; margin: 0 auto; }
.s-tag { color: var(--text-light); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; margin-bottom: 10px; display: block; }
.s-title { font-size: 2.5rem; font-weight: 800; color: var(--primary); margin-bottom: 50px; }

.services-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px;
}

.srv {
  background: var(--surface); border-radius: var(--radius-lg);
  border: 1px solid var(--border); transition: var(--transition);
  overflow: hidden; cursor: pointer;
}
.srv:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.srv.open { border-color: var(--primary); }

.srv-header {
  display: flex; align-items: center; gap: 16px;
  padding: 28px 30px;
}
.srv-icon { font-size: 2rem; flex-shrink: 0; }
.srv-header h4 { font-size: 1.1rem; color: var(--primary); flex: 1; margin: 0; }

.srv-arrow {
  font-size: 0.75rem; color: var(--text-light);
  transition: transform 0.3s ease; display: inline-block;
}
.srv.open .srv-arrow { transform: rotate(180deg); color: var(--primary); }

.srv-body {
  max-height: 0; overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 30px;
}
.srv-body p { color: var(--text-light); font-size: 0.95rem; margin: 0; padding-bottom: 24px; }
.srv.open .srv-body { max-height: 500px; }

/* 4.5 MODULISTICA */
.downloads-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px;
}
.download-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.download-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.d-icon { font-size: 2rem; flex-shrink: 0; }
.d-info { flex: 1; }
.d-info h4 { font-size: 1.1rem; color: var(--primary); margin-bottom: 4px; }
.d-info p { font-size: 0.85rem; color: var(--text-light); margin: 0; }
.btn-download {
  background: var(--primary);
  color: var(--surface);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-download:hover { background: var(--primary-dark); }

/* 5. CHI SIAMO */
.about-container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.stats-row { display: flex; gap: 40px; margin-top: 30px; }
.stat-item strong { display: block; font-size: 2.2rem; color: var(--primary); }
.stat-item span { color: var(--text-light); }
.feat-card {
  background: var(--primary); color: var(--surface); padding: 25px;
  border-radius: var(--radius-md); margin-bottom: 15px; display: flex; gap: 15px; align-items: center;
}

/* 6. CONTATTI */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 60px; align-items: flex-start; }

.form-container {
  background: var(--surface);
  padding: 40px; border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.cd-item { margin-bottom: 20px; }
.cd-item label { color: var(--text-light); font-size: 0.85rem; text-transform: uppercase; font-weight: bold; }
.cd-item p { color: var(--text); font-size: 1.1rem; }

.modern-form { display: grid; gap: 12px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text);
  font-family: inherit; font-size: 0.95rem; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); background: var(--surface);
}
.form-group textarea { min-height: 100px; resize: none; }

.btn-submit {
  background: var(--accent); color: var(--surface); border: none;
  padding: 16px; border-radius: 10px; font-weight: 700;
  cursor: pointer; transition: var(--transition);
}
.btn-submit:hover { background: #820909; } /* Rosso ancora più scuro per l'hover */

/* 7. FOOTER */
footer { padding: 40px 24px; border-top: 1px solid var(--border); background: var(--surface); }
.footer-content {
  max-width: 1200px; margin: 0 auto; display: flex;
  justify-content: space-between; font-size: 0.85rem; color: var(--text-light);
}

/* 8. RESPONSIVE & MOBILE MENU */
@media (max-width: 968px) {
  .hamburger { display: flex; }

  .nav-links {
    position: fixed; top: 0; right: -100%;
    width: 80%; height: 100vh;
    background: var(--surface);
    flex-direction: column; align-items: center; justify-content: center;
    gap: 30px; transition: 0.4s ease;
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
  }

  .nav-links.active { right: 0; }
  .nav-cta { display: none; }

  /* Hamburger Animazione */
  .hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .hamburger.active span:nth-child(2) { opacity: 0; }
  .hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

  .hero-content, .about-container, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-left { order: -1; } 
  .hero-title, .hero-desc { text-align: center; margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .form-container { padding: 25px; }
  
  /* Aggiunta regola responsive per Modulistica per sicurezza (anche se il grid-template-columns fa già il suo lavoro) */
  .download-card { flex-direction: column; text-align: center; }
  
  .footer-content { flex-direction: column; text-align: center; gap: 15px; }
}