:root {
  --c-primary: #0D3B66;
  --c-primary-dark: #092a4a;
  --c-primary-light: #1a5490;
  --c-accent: #F4A261;
  --c-bg: #F7F9FC;
  --c-surface: #FFFFFF;
  --c-text: #1a2330;
  --c-muted: #5b6b80;
  --c-border: #e3e8ef;
  --shadow-sm: 0 2px 6px rgba(13,59,102,.06);
  --shadow-md: 0 8px 20px rgba(13,59,102,.08);
  --shadow-lg: 0 18px 40px rgba(13,59,102,.14);
}

html, body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ============ NAVBAR (bianca, minimale) ============ */
.navbar-compito {
  background: #fff;
  border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
}
.navbar-compito .navbar-brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  color: var(--c-primary) !important;
  font-weight: 700;
  letter-spacing: -.01em;
}
.navbar-compito .navbar-brand img {
  height: 38px;
  width: auto;
}
.navbar-compito .navbar-brand .brand-sub {
  color: var(--c-muted);
  font-weight: 500;
  font-size: .82rem;
  margin-left: .35rem;
}

/* ============ HERO con immagine di sfondo + overlay ============ */
.hero {
  position: relative;
  min-height: 480px;
  padding: 6rem 0 8rem;
  color: #fff;
  background-image:
    linear-gradient(135deg, rgba(13,59,102,.88) 0%, rgba(26,84,144,.78) 100%),
    url('https://images.unsplash.com/photo-1571260899304-425eee4c7efc?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  background-attachment: scroll;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--c-bg));
  pointer-events: none;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.28);
  padding: .35rem .85rem;
  border-radius: 999px;
  color: #fff;
  font-size: .85rem;
  letter-spacing: .02em;
  margin-bottom: 1.1rem;
  backdrop-filter: blur(6px);
}
.hero-eyebrow strong { font-weight: 700; }
.hero h1 {
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.08;
}
.hero-subjects {
  display: flex; flex-wrap: wrap; gap: .4rem .55rem;
  align-items: center;
}
.hero-subjects-label {
  color: rgba(255,255,255,.85);
  font-size: .85rem;
  margin-right: .25rem;
}
.subject-pill {
  background: transparent;
  border: 1px dashed rgba(255,255,255,.45);
  color: rgba(255,255,255,.92);
  padding: .25rem .7rem;
  border-radius: 999px;
  font-size: .8rem;
}
.hero .lead {
  opacity: .94;
  font-size: 1.15rem;
  max-width: 36rem;
}
.hero-badges {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin-top: 1.75rem;
}
.hero-badges .badge {
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  font-weight: 500;
  padding: .5rem .85rem;
  font-size: .85rem;
  backdrop-filter: blur(6px);
}
.hero-badges .badge i { margin-right: .35rem; }

/* ============ ACCESS CARD (galleggia sopra l'hero) ============ */
.access-card {
  background: var(--c-surface);
  border-radius: 1.25rem;
  box-shadow: var(--shadow-lg);
  padding: 2.25rem;
  margin-top: -5rem;
  position: relative;
  z-index: 3;
  border: 1px solid var(--c-border);
}
.access-card .access-header {
  display: flex; align-items: center; gap: .85rem; margin-bottom: 1.5rem;
}
.access-card .access-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.35rem;
}
.access-card h2 {
  color: var(--c-primary);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
}
.access-card .access-sub {
  color: var(--c-muted);
  font-size: .9rem;
  margin: .2rem 0 0;
}
.form-control-lg {
  border-radius: .65rem;
  border-color: var(--c-border);
  padding: .8rem 1rem;
}
.form-control-lg:focus {
  border-color: var(--c-primary-light);
  box-shadow: 0 0 0 .2rem rgba(13,59,102,.12);
}

/* ============ BOTTONI ============ */
.btn-primary-compito {
  background: var(--c-primary);
  border: 1px solid var(--c-primary);
  color: #fff;
  font-weight: 600;
  padding: .8rem 1.5rem;
  border-radius: .65rem;
  transition: all .2s ease;
}
.btn-primary-compito:hover,
.btn-primary-compito:focus {
  background: var(--c-primary-dark);
  border-color: var(--c-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ============ STATS BAR ============ */
.stats {
  margin-top: 4rem;
}
.stat {
  text-align: center;
  padding: 1.5rem 1rem;
}
.stat .stat-value {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: -.02em;
  line-height: 1;
}
.stat .stat-label {
  color: var(--c-muted);
  font-size: .9rem;
  margin-top: .35rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ============ FEATURE CARDS ============ */
.section-title {
  color: var(--c-primary);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .35rem;
}
.section-subtitle {
  color: var(--c-muted);
  margin-bottom: 2.25rem;
  font-size: 1.05rem;
}
.feature {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 1rem;
  padding: 1.75rem;
  height: 100%;
  transition: all .25s ease;
}
.feature:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.feature .feature-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(13,59,102,.10), rgba(26,84,144,.06));
  color: var(--c-primary);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.55rem;
  margin-bottom: 1.1rem;
}
.feature h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: .5rem;
}
.feature p {
  color: var(--c-muted);
  margin: 0;
  font-size: .95rem;
  line-height: 1.55;
}
.step-num {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: .35rem;
}

/* ============ FOOTER ============ */
footer.site-footer {
  background: var(--c-primary-dark);
  color: rgba(255,255,255,.85);
  padding: 2.5rem 0 1.75rem;
  margin-top: 5rem;
  font-size: .9rem;
}
footer.site-footer a { color: #fff; text-decoration: none; }
footer.site-footer a:hover { text-decoration: underline; }
footer.site-footer .footer-brand {
  display: flex; align-items: center; gap: .6rem;
  font-weight: 600;
}
footer.site-footer .footer-brand img {
  height: 30px; background: #fff; padding: 4px 8px; border-radius: 6px;
}

@media (max-width: 768px) {
  .hero { padding: 4rem 0 6rem; min-height: 380px; }
  .hero h1 { font-size: 2rem; }
  .access-card { margin-top: -3rem; padding: 1.5rem; }
  .stat .stat-value { font-size: 1.9rem; }
}