:root {
  --primary: #4169e1;
  --accent: #8b5cf6;
  --bg: #f7f8fa;
  --white: #fff;
  --dark: #10172a;
  --gray: #727e97;
  --light-gray: #e2e6ee;
  --card: #f4f6fb;
  --shadow: 0 8px 24px rgba(30,41,59,0.07), 0 1.5px 3px rgba(30,41,59,0.03);
  --radius: 1.2rem;
  --transition: 0.18s cubic-bezier(.4,0,.2,1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.55;
  min-height: 100vh;
}

/* === NAVBAR DESKTOP === */
header {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 30;
}
.navbar {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0.7rem 2.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-weight: 700;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--primary);
  letter-spacing: 1px;
}
.nav-links {
  display: flex;
  gap: 2.1rem;
  list-style: none;
}
.nav-links li a {
  text-decoration: none;
  color: var(--gray);
  font-weight: 500;
  transition: color var(--transition);
  font-size: 1rem;
  position: relative;
}
.nav-links li a:hover,
.nav-links li a:focus {
  color: var(--primary);
}
.nav-toggle {
  display: none;
}

/* === SECTION BASE === */
.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 2rem;
  background: var(--bg);
  position: relative;
}

.hero {
  background: linear-gradient(100deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--white);
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 4rem;
  padding-bottom: 2rem;
}
.hero-content {
  max-width: 540px;
  z-index: 2;
}
.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  line-height: 1.13;
  letter-spacing: -1.5px;
}
.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  font-weight: 400;
  color: rgba(255,255,255,0.92);
}
.cta-btn {
  display: inline-block;
  background: var(--white);
  color: var(--primary);
  padding: 0.85rem 2.1rem;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.1rem;
  box-shadow: var(--shadow);
  transition: background var(--transition), color var(--transition), transform 0.12s;
  border: none;
  outline: none;
  cursor: pointer;
}
.cta-btn:hover,
.cta-btn:focus {
  background: var(--accent);
  color: var(--white);
  transform: translateY(-2px) scale(1.04);
}
.hero-graphic {
  font-size: 5.5rem;
  color: var(--white);
  opacity: 0.16;
  user-select: none;
  pointer-events: none;
}

.about {
  background: var(--white);
  box-shadow: var(--shadow);
}
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 2.2rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}
.about-content {
  max-width: 560px;
}
.about-content h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1.1rem;
  color: var(--primary);
}
.about-content p {
  color: var(--gray);
  font-size: 1.08rem;
  margin-bottom: 1.2rem;
}
.about-features {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  margin-top: 1.2rem;
}
.about-features li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1rem;
  color: var(--dark);
}
.about-features i {
  color: var(--accent);
  font-size: 1.2rem;
}
.about-image {
  font-size: 6rem;
  color: var(--primary);
  opacity: 0.11;
  user-select: none;
}

.solutions {
  background: var(--bg);
}
.solutions h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  text-align: center;
  color: var(--primary);
}
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 2.5rem;
  width: 100%;
  margin: 0 auto;
}
.solution-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.7rem;
  text-align: left;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  min-height: 310px;
}
.solution-card i {
  font-size: 2.3rem;
  color: var(--primary);
  margin-bottom: 0.6rem;
}
.solution-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--dark);
}
.solution-card p {
  color: var(--gray);
  font-size: 1rem;
  margin-bottom: 0.7rem;
}
.solution-card ul {
  list-style: none;
  color: var(--accent);
  font-size: 0.97rem;
  padding-left: 0;
}
.solution-card ul li {
  margin-bottom: 0.25rem;
  color: var(--dark);
}
.solution-card:hover {
  box-shadow: 0 8px 28px rgba(60,100,210,0.14);
  transform: translateY(-5px) scale(1.025);
}

.stats {
  background: var(--white);
}
.stats h2 {
  font-size: 2.15rem;
  font-weight: 700;
  text-align: center;
  color: var(--primary);
  margin-bottom: 2.2rem;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 2.2rem;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
  width: 100%;
  max-width: 900px;
}
.stat-card {
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  padding: 2rem 0.7rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.1rem;
  letter-spacing: 1px;
}
.stat-label {
  font-size: 1.08rem;
  color: var(--gray);
  font-weight: 500;
}

.contact {
  background: linear-gradient(105deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--white);
  flex-direction: column;
  justify-content: flex-start;
  padding-bottom: 0;
  position: relative;
}
.contact h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.9rem;
  color: var(--white);
}
.contact p {
  color: rgba(255,255,255,0.87);
  margin-bottom: 1.7rem;
}
.contact-form {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  background: rgba(255,255,255,0.06);
  padding: 2.2rem 1.6rem 1.4rem 1.6rem;
  border-radius: var(--radius);
  box-shadow: 0 4px 18px rgba(0,0,0,0.09);
  backdrop-filter: blur(2px);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.form-group label {
  font-weight: 500;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.form-group input,
.form-group textarea {
  padding: 0.9rem 1rem;
  border: none;
  border-radius: 0.7rem;
  font-size: 1rem;
  outline: none;
  background: rgba(255,255,255,0.85);
  color: var(--dark);
  font-family: inherit;
  resize: none;
  transition: box-shadow 0.12s;
}
.form-group input:focus,
.form-group textarea:focus {
  box-shadow: 0 0 0 2px var(--primary);
  background: var(--white);
}
.submit-btn {
  background: var(--accent);
  color: var(--white);
  border: none;
  padding: 1rem 2.5rem;
  border-radius: var(--radius);
  font-size: 1.08rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  align-self: flex-end;
  transition: background var(--transition), transform 0.13s;
}
.submit-btn:hover,
.submit-btn:focus {
  background: var(--primary);
  transform: translateY(-1.5px) scale(1.02);
}
.contact-info {
  margin-top: 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  color: var(--white);
  font-size: 1.05rem;
  opacity: 0.94;
}
.contact-info i {
  margin-right: 0.5rem;
  color: var(--accent);
}
footer {
  text-align: center;
  color: rgba(255,255,255,0.74);
  font-size: 0.97rem;
  margin-top: 3.5rem;
  padding: 1.5rem 0 0.2rem 0;
  border-top: 1px solid rgba(255,255,255,0.14);
}

/* === RESPONSIVE BREAKPOINTS === */
@media (min-width: 1101px) {
  .nav-toggle {
    display:none !important;
}
}
@media (max-width: 1100px) {
  .container {
    flex-direction: column;
    gap: 2.2rem;
    padding: 2rem 0;
    text-align: center;
  }
  .about-content, .about-image {
    max-width: 100%;
  }
  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 550px;
  }
}
@media (max-width: 900px) {
  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.3rem;
    max-width: 480px;
  }
}

/* === NAVBAR MOBILE: FINALE, CORRETTO === */
@media (max-width: 700px) {
  header {
    position: static !important;
    box-shadow: none !important;
  }
  .navbar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.1rem;
    position: relative;
    gap: 0;
  }
  .logo {
    font-size: 1.2rem;
  }
  .nav-toggle {
    display: flex !important;
    align-items: center;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--primary);
    cursor: pointer;
    z-index: 99;
  }
  .nav-links {
    display: flex;
    flex-direction: column;
    gap: 2.3rem;
    position: fixed;
    top: 0;
    right: 0;
    background: var(--white);
    height: 100vh;
    width: 82vw;
    max-width: 320px;
    box-shadow: -3px 0 18px rgba(40,40,100,0.12);
    padding: 6rem 2.2rem 2.2rem 2.2rem;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(.7,.2,.22,.97);
    z-index: 98;
  }
  .nav-links.open {
    transform: translateX(0%);
  }
  body.menu-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(30,41,59,0.23);
    z-index: 97;
  }
}

/* Hamburger hidden di default, solo mobile visibile */
.nav-toggle {
  display: none;
}
@media (max-width: 700px) {
  .nav-toggle {
    display: flex !important;
  }
}

/* === HERO E ABOUT CENTRATI MOBILE === */
@media (max-width: 700px) {
  .hero {
    flex-direction: column;
    gap: 1.5rem;
    padding: 3.5rem 1rem 1.5rem 1rem;
    min-height: 90vh;
    justify-content: center;
  }
  .hero-content {
    text-align: center;
    align-items: center;
    justify-content: center;
    display: flex;
    flex-direction: column;
  }
  .hero-content h1 {
    font-size: 2.1rem;
  }
  .container {
    flex-direction: column;
    gap: 1.6rem;
    padding: 1.4rem 0;
    text-align: center;
  }
  .about-content {
    text-align: center;
    align-items: center;
    display: flex;
    flex-direction: column;
  }
  .about-features {
    justify-content: center;
    align-items: center;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
  }
  .about-content h2,
  .solutions h2,
  .stats h2,
  .contact h2 {
    font-size: 1.5rem;
  }
  .about-image,
  .hero-graphic {
    display: none;
  }
  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }
  .stat-card {
    padding: 1.1rem 0.4rem;
  }
  .contact-form {
    padding: 1.2rem 0.5rem 0.9rem 0.5rem;
  }
}

/* === EXTRA MOBILE < 480px === */
@media (max-width: 480px) {
  .section {
    padding: 0 0.2rem;
  }
  .container {
    padding: 0.5rem 0;
    gap: 1rem;
  }
  .about-features {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1.1rem;
    max-width: 100%;
  }
  .stat-number {
    font-size: 1.45rem;
  }
}