:root {
  --accent: #1B3F6E;
  --black:  #000000;
  --white:  #FFFFFF;
  --bg:     #F5F5F5;
  --mono:   'Courier New', monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  background-color: var(--bg);
  color: var(--black);
  font-family: Arial, sans-serif;
  margin: 0;
  line-height: 1.5;
}

h1, h2, h3, .btn, nav a {
  font-family: var(--mono);
  text-transform: uppercase;
  font-weight: bold;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- HEADER --- */

header {
  padding: 20px 0;
  border-bottom: 3px solid var(--black);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo {
  font-size: 1.6em;
  font-family: var(--mono);
  font-weight: bold;
  text-transform: uppercase;
  flex-shrink: 0;
}

.logo .li {
  background-color: var(--black);
  color: var(--white);
  padding: 0 3px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--black);
  text-decoration: none;
  font-size: 0.95em;
  transition: background-color 0.15s;
  padding: 4px 6px;
}

nav a:hover {
  background-color: var(--accent);
  color: var(--white);
}

/* --- BUTTON --- */

.btn {
  background-color: var(--accent);
  color: var(--white);
  padding: 12px 20px;
  text-decoration: none;
  border: 3px solid var(--black);
  transition: background-color 0.15s, color 0.15s;
  display: inline-block;
  cursor: pointer;
  font-family: var(--mono);
  font-weight: bold;
  text-transform: uppercase;
  font-size: 1em;
  line-height: 1.3;
}

.btn:hover {
  background-color: var(--black);
  color: var(--white);
}

/* --- HERO --- */

.hero {
  text-align: center;
  padding: 70px 0;
  border-bottom: 3px solid var(--black);
}

.hero h1 {
  font-size: 3.6em;
  margin: 0 0 20px 0;
  line-height: 1.05;
}

.hero p {
  font-size: 1.15em;
  max-width: 720px;
  margin: 0 auto 24px;
}

.ai-mark {
  color: var(--accent);
  font-weight: bold;
}

.hero-cta {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 20px;
  flex-wrap: wrap;
  max-width: 680px;
  margin: 0 auto;
}

.hero-cta .btn,
.hero-cta .link-esempio {
  flex: 1 1 220px;
  text-align: center;
}

.link-esempio {
  font-family: var(--mono);
  font-size: 1em;
  font-weight: bold;
  text-transform: uppercase;
  color: var(--black);
  text-decoration: none;
  display: inline-block;
  padding: 12px 20px;
  border: 3px solid var(--black);
  line-height: 1.3;
  transition: background-color 0.15s, color 0.15s;
}

.link-esempio:hover {
  background-color: var(--black);
  color: var(--white);
}

@media (max-width: 480px) {
  .hero-cta .btn,
  .hero-cta .link-esempio {
    flex: 1 1 100%;
  }
}

.platforms-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
}

.platform-tag {
  font-family: var(--mono);
  font-size: 0.75em;
  font-weight: bold;
  text-transform: uppercase;
  padding: 5px 11px;
  border: 2px solid var(--black);
  background-color: var(--white);
  letter-spacing: 0.04em;
}

/* --- SECTIONS --- */

.section {
  padding: 60px 0;
  border-bottom: 3px solid var(--black);
}

.section-title {
  font-size: 2em;
  margin: 0 0 40px 0;
  text-align: center;
}

/* --- CARDS --- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background-color: var(--white);
  border: 3px solid var(--black);
  padding: 24px;
}

.card h3 {
  font-size: 1.1em;
  margin: 0 0 12px 0;
  background-color: var(--accent);
  color: var(--white);
  display: inline;
  padding: 3px 8px;
}

.card p {
  margin: 14px 0 0 0;
  font-size: 0.95em;
}

.section-note {
  margin-top: 32px;
  font-size: 0.88em;
  color: #555;
  text-align: center;
}

/* --- STATS --- */

.stats-section {
  padding: 60px 0;
  border-bottom: 3px solid var(--black);
  background-color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 3px solid var(--black);
}

.stat-cell {
  padding: 32px 20px;
  border-right: 3px solid var(--black);
  text-align: center;
}

.stat-cell:last-child {
  border-right: none;
}

.stat-number {
  font-family: var(--mono);
  font-size: 3.6em;
  font-weight: bold;
  line-height: 1;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-family: var(--mono);
  font-size: 0.82em;
  font-weight: bold;
  text-transform: uppercase;
  display: block;
  margin-top: 10px;
  color: var(--black);
}

.stat-source {
  font-size: 0.76em;
  color: #666;
  display: block;
  margin-top: 8px;
  line-height: 1.4;
}

/* --- VALUE GRID --- */

.value-section {
  padding: 60px 0;
  border-bottom: 3px solid var(--black);
}

.value-section > .container > p {
  font-size: 1.05em;
  max-width: 700px;
  margin: 0 auto;
}

.value-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 3px solid var(--black);
  margin-top: 40px;
}

.value-cell {
  padding: 28px;
  border: 1px solid var(--black);
}

.value-cell .label {
  font-family: var(--mono);
  font-size: 0.82em;
  text-transform: uppercase;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 6px;
}

.value-cell .amount {
  font-family: var(--mono);
  font-size: 2em;
  font-weight: bold;
}

.value-cell p {
  margin: 8px 0 0 0;
  font-size: 0.92em;
  color: #333;
}

.value-cell.highlight {
  background-color: var(--accent);
  color: var(--white);
}

.value-cell.highlight .label {
  color: rgba(255,255,255,0.7);
}

.value-cell.highlight .amount {
  color: var(--white);
}

.value-cell.highlight p {
  color: rgba(255,255,255,0.8);
}

/* --- FORM SECTION --- */

.form-section {
  padding: 60px 0;
  background-color: var(--accent);
  border-bottom: 3px solid var(--black);
}

.form-section .section-title {
  color: var(--white);
}

.form-wrapper {
  max-width: 680px;
  margin: 0 auto;
  background-color: var(--white);
  border: 3px solid var(--black);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-family: var(--mono);
  font-weight: bold;
  text-transform: uppercase;
  font-size: 0.88em;
  margin-bottom: 6px;
}

.form-group .required {
  color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 3px solid var(--black);
  font-family: Arial, sans-serif;
  font-size: 1em;
  background-color: var(--bg);
  transition: border-color 0.15s, background-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--white);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23000' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-color: var(--bg);
  padding-right: 36px;
}

.form-note {
  font-size: 0.83em;
  color: #555;
  margin-top: 14px;
}

.alert {
  padding: 12px 16px;
  border: 3px solid var(--black);
  margin-bottom: 20px;
  font-weight: bold;
  font-family: var(--mono);
  font-size: 0.9em;
}

.alert-error {
  background-color: #FFEEEE;
  color: #CC0000;
}

.success-box {
  text-align: center;
  padding: 40px 20px;
}

.success-box h3 {
  font-size: 1.6em;
  margin: 0 0 14px 0;
}

.success-box p {
  font-size: 1em;
  max-width: 420px;
  margin: 0 auto;
}

/* --- FOOTER --- */

footer.main-footer {
  padding: 28px 0;
  text-align: center;
  font-size: 0.88em;
  background-color: var(--accent);
  color: var(--white);
  border-top: 3px solid var(--black);
}

/* --- RESPONSIVE --- */

@media (max-width: 900px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-cell:nth-child(2) {
    border-right: none;
  }
  .stat-cell:nth-child(3) {
    border-right: none;
    border-top: 3px solid var(--black);
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .hero h1 { font-size: 2.4em; }
  .hero p  { font-size: 1em; }
  .section-title { font-size: 1.6em; }

  nav ul { display: none; }

  .stats-grid { grid-template-columns: 1fr; }
  .stat-cell {
    border-right: none;
    border-top: none;
    border-bottom: 3px solid var(--black);
  }
  .stat-cell:last-child { border-bottom: none; }
  .stat-number { font-size: 2.8em; }

  .value-grid { grid-template-columns: 1fr; }

  .form-wrapper { padding: 24px 16px; }

  .hero { padding: 48px 0; }
  .section { padding: 40px 0; }
  .stats-section { padding: 40px 0; }
  .value-section { padding: 40px 0; }
  .form-section { padding: 40px 0; }
}

@media (max-width: 420px) {
  .hero h1 { font-size: 1.9em; }
  .logo { font-size: 1.3em; }
  .btn { font-size: 0.88em; padding: 10px 14px; }
}