:root {
    --primary: #2563EB; /* Blu educativo e tecnologico */
    --primary-hover: #1D4ED8;
    --dark: #0F172A;
    --light: #F8FAFC;
    --surface: #FFFFFF;
    --text: #1E293B;
    --text-muted: #64748B;
    --border: #E2E8F0;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.05);
    --transition: all 0.3s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: var(--light); color: var(--text); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; height: auto; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 2.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 2.5rem; }
.w-100 { width: 100%; }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-700 { max-width: 700px; }
.d-flex { display: flex; }
.d-inline-block { display: inline-block; }
.d-block { display: block; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-center { align-items: center; }
.gap-3 { gap: 1rem; }
.gap-4 { gap: 1.5rem; }
.bg-light { background-color: #F1F5F9; }
.bg-primary { background-color: var(--primary); }
.text-white { color: #FFFFFF; }
.text-primary { color: var(--primary); }
.text-success { color: #16A34A; }
.border-radius { border-radius: var(--radius); }
.border-circle { border-radius: 50%; }
.border-bottom { border-bottom: 1px solid var(--border); }
.py-5 { padding-top: 3rem; padding-bottom: 3rem; }
.py-lg { padding-top: 5rem; padding-bottom: 5rem; }
.p-0 { padding: 0; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.overflow-hidden { overflow: hidden; }
.flex-grow { flex-grow: 1; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }

/* Buttons & Badges */
.btn { display: inline-block; padding: 0.6rem 1.25rem; border-radius: 6px; font-weight: 600; cursor: pointer; text-align: center; border: 2px solid transparent; font-size: 0.95rem; font-family:inherit; transition: var(--transition); }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--border); }
.btn-outline:hover { background: var(--light); border-color: var(--primary); }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
.btn-lg { padding: 0.8rem 1.8rem; font-size: 1.1rem; }
.badge { background: #DBEAFE; color: var(--primary); padding: 0.3rem 0.8rem; border-radius: 20px; font-size: 0.8rem; font-weight: bold; }
.badge-outline { border: 1px solid var(--border); color: var(--text-muted); padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.75rem; }

/* Form Controls */
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--text); }
.form-control, .form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.75rem; border: 1px solid var(--border); border-radius: 6px; font-family: inherit; font-size: 0.95rem; }
.form-control:focus, .form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2); }

/* Header & Nav */
.navbar { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; padding: 1rem 0; box-shadow: 0 1px 3px rgba(0,0,0,0.02); }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 800; font-size: 1.25rem; color: var(--dark); }
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--text); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-actions { display: flex; gap: 0.8rem; }
.mobile-menu-btn { display: none; background: transparent; border: none; cursor: pointer; color: var(--text); }

/* Cards & Components */
.card { background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s; }
.card:hover { box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); transform: translateY(-2px); }
.icon-wrapper { background: #EFF6FF; border-radius: 12px; display: flex; align-items: center; justify-content: center; width: 80px; height: 80px; }
.check-list { list-style: none; }
.check-list li { position: relative; padding-left: 1.5rem; margin-bottom: 0.5rem; font-size: 0.9rem; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: #16A34A; font-weight: bold; }
.cross-list { list-style: none; }
.cross-list li { position: relative; padding-left: 1.5rem; margin-bottom: 0.5rem; font-size: 0.9rem; }
.cross-list li::before { content: "✕"; position: absolute; left: 0; color: #DC2626; font-weight: bold; }
.styled-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; background: var(--surface); border-radius: 8px; overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.styled-table th, .styled-table td { padding: 12px 15px; border-bottom: 1px solid var(--border); text-align: left; }
.styled-table th { background: var(--light); font-weight: 600; color: var(--dark); }
.alert { padding: 1rem; border-radius: 6px; }
.alert-warning { background: #FEF3C7; color: #92400E; border: 1px solid #FDE68A; }

/* Pricing */
.pricing-card { cursor: pointer; }
.pricing-card.selected { border-color: var(--primary); background: #F8FAFC; }

/* Modals */
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.6); z-index: 1000; justify-content: center; align-items: center; padding: 1rem; }
.modal.active { display: flex; }
.modal-content { background: var(--surface); padding: 2.5rem; border-radius: var(--radius); width: 100%; max-width: 450px; position: relative; box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); }
.modal-lg { max-width: 700px; }
.close-btn { position: absolute; top: 1rem; right: 1rem; background: transparent; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text-muted); }

/* Cookie Banner */
.cookie-banner { display: none; position: fixed; bottom: 0; left: 0; width: 100%; background: var(--surface); padding: 1.5rem 0; z-index: 999; border-top: 1px solid var(--border); box-shadow: 0 -4px 10px rgba(0,0,0,0.05); }
.cookie-container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.cookie-actions { display: flex; gap: 0.5rem; }

/* Trust Strip */
.trust-strip { background: var(--surface); padding: 1.5rem 0; border-bottom: 1px solid var(--border); border-top: 1px solid var(--border); }
.trust-flex { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem; }
.trust-item { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; font-size: 0.9rem; color: var(--dark); }
.trust-item svg { color: var(--primary); }

/* Footer */
.footer { background: var(--dark); color: #CBD5E1; padding: 4rem 0 2rem; font-size: 0.9rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.footer h4 { color: #FFFFFF; margin-bottom: 1rem; }
.footer a { color: #94A3B8; display: block; margin-bottom: 0.5rem; }
.footer a:hover { color: #FFFFFF; }
.footer-logo { color: #FFFFFF; }
.compliance-disclaimer { border: 1px solid #334155; padding: 1.5rem; border-radius: 8px; background: rgba(255,255,255,0.02); }
.compliance-disclaimer ul { margin-top: 0.5rem; padding-left: 1.5rem; }
.footer-bottom { border-top: 1px solid #334155; padding-top: 1.5rem; text-align: center; }

@media (max-width: 850px) {
    .nav-links, .nav-actions { display: none; }
    .mobile-menu-btn { display: block; }
    .nav-links.active-menu, .nav-actions.active-menu { display: flex; flex-direction: column; position: absolute; left: 0; width: 100%; background: var(--surface); padding: 1rem; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
    .nav-links.active-menu { top: 60px; }
    .nav-actions.active-menu { top: calc(60px + 280px); flex-direction: row; justify-content: center; }
    .footer-grid { grid-template-columns: 1fr; }
    .trust-flex { flex-direction: column; align-items: flex-start; }
}