/**
 * Stili per le sezioni informative della home (landing) sopra il questionario.
 * Riusa il design system definito in main.css.
 */

/* ============================================
   NAV
   ============================================ */
.landing-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.landing-nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--spacing-3) var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
}

.landing-nav .logo-brand {
    text-decoration: none;
    color: inherit;
}

.landing-nav-links {
    display: flex;
    gap: var(--spacing-6);
    align-items: center;
    margin: 0 auto;
}

.landing-nav-links a {
    color: var(--gray-300);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    padding: var(--spacing-2) 0;
    position: relative;
    transition: color var(--transition-base);
}

.landing-nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.landing-nav-links a:hover,
.landing-nav-links a:focus-visible {
    color: white;
}

.landing-nav-links a:hover::after,
.landing-nav-links a:focus-visible::after {
    width: 100%;
}

.landing-nav-cta {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

/* Mobile menu toggle (hamburger) */
.landing-nav-toggle {
    display: none;
    background: transparent;
    border: 0;
    width: 40px;
    height: 40px;
    padding: 8px;
    cursor: pointer;
    flex-direction: column;
    justify-content: space-between;
}

.landing-nav-toggle span {
    display: block;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.landing-nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}
.landing-nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.landing-nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

.landing-nav-mobile {
    display: none;
    flex-direction: column;
    padding: var(--spacing-2) var(--spacing-4) var(--spacing-4);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
}

.landing-nav-mobile[hidden] {
    display: none !important;
}

.landing-nav-mobile a {
    color: var(--gray-200);
    text-decoration: none;
    padding: var(--spacing-3) 0;
    font-size: var(--font-size-base);
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.landing-nav-mobile a:last-child {
    border-bottom: 0;
}

.landing-nav-mobile-cta {
    margin-top: var(--spacing-2);
    color: var(--primary-400) !important;
    font-weight: 600 !important;
}

@media (max-width: 768px) {
    .landing-nav-links {
        display: none;
    }
    .landing-nav-toggle {
        display: flex;
    }
    .landing-nav-cta {
        display: none;
    }
    .landing-nav-mobile.is-open {
        display: flex;
    }
}

/* ============================================
   CONTAINER
   ============================================ */
.landing-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.landing-container-narrow {
    max-width: 760px;
}

@media (max-width: 480px) {
    .landing-container {
        padding: 0 var(--spacing-4);
    }
}

/* ============================================
   SECTION BASE
   ============================================ */
.landing-section {
    padding: var(--spacing-16) 0;
}

.landing-section-alt {
    background: rgba(255, 255, 255, 0.02);
}

@media (max-width: 768px) {
    .landing-section {
        padding: var(--spacing-12) 0;
    }
}

.landing-eyebrow,
.landing-section-eyebrow {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--primary-400);
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-4);
}

.landing-h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: white;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 var(--spacing-6);
}

.landing-h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: white;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin: 0 0 var(--spacing-8);
}

.landing-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.landing-lede {
    font-size: clamp(1rem, 1.6vw, 1.25rem);
    color: var(--gray-300);
    max-width: 640px;
    line-height: 1.6;
    margin: 0 0 var(--spacing-8);
}

/* ============================================
   HERO
   ============================================ */
.landing-hero {
    padding: var(--spacing-16) 0 var(--spacing-12);
    text-align: left;
}

@media (max-width: 768px) {
    .landing-hero {
        padding: var(--spacing-10) 0 var(--spacing-8);
    }
}

.landing-hero-actions {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-8);
}

.landing-hero-pills {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.landing-hero-pills li {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--gray-300);
}

/* ============================================
   COME FUNZIONA — steps
   ============================================ */
.landing-steps {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-6);
}

.landing-steps li {
    position: relative;
    padding: var(--spacing-6);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
}

.landing-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    font-weight: 700;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-4);
    box-shadow: var(--shadow-glow);
}

.landing-steps h3 {
    font-size: var(--font-size-lg);
    color: white;
    margin: 0 0 var(--spacing-2);
}

.landing-steps p {
    color: var(--gray-400);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   VANTAGGI — cards
   ============================================ */
.landing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-5);
}

.landing-card {
    padding: var(--spacing-6);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    transition: transform var(--transition-base), border-color var(--transition-base);
}

.landing-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.4);
}

.landing-card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-3);
}

.landing-card h3 {
    font-size: var(--font-size-lg);
    color: white;
    margin: 0 0 var(--spacing-2);
}

.landing-card p {
    color: var(--gray-400);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   PER CHI è
   ============================================ */
.landing-audience {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-6);
}

.landing-audience-item {
    padding: var(--spacing-5);
    border-left: 3px solid var(--primary-500);
    background: rgba(255, 255, 255, 0.02);
}

.landing-audience-item h3 {
    font-size: var(--font-size-lg);
    color: white;
    margin: 0 0 var(--spacing-2);
}

.landing-audience-item p {
    color: var(--gray-400);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   FAQ
   ============================================ */
.landing-faq {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.landing-faq-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4) var(--spacing-5);
    transition: border-color var(--transition-base);
}

.landing-faq-item[open] {
    border-color: rgba(99, 102, 241, 0.4);
}

.landing-faq-item summary {
    cursor: pointer;
    list-style: none;
    color: white;
    font-weight: 600;
    font-size: var(--font-size-base);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3);
    min-height: 32px;
}

.landing-faq-item summary::-webkit-details-marker {
    display: none;
}

.landing-faq-item summary::after {
    content: '+';
    color: var(--primary-400);
    font-weight: 400;
    font-size: 1.5rem;
    line-height: 1;
    transition: transform var(--transition-base);
}

.landing-faq-item[open] summary::after {
    content: '−';
}

.landing-faq-item p {
    color: var(--gray-300);
    line-height: 1.7;
    margin: var(--spacing-3) 0 0;
}

.landing-faq-item p a {
    color: var(--primary-400);
}

/* ============================================
   CTA finale
   ============================================ */
.landing-cta {
    text-align: center;
}

.landing-cta .landing-h2 {
    margin-bottom: var(--spacing-4);
}

.landing-cta .landing-lede {
    margin: 0 auto var(--spacing-6);
}

/* ============================================
   SCROLL — smooth e correzione anchor con nav sticky
   ============================================ */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

#come-funziona,
#vantaggi,
#per-chi,
#faq {
    scroll-margin-top: 80px;
}

/* ============================================
   FOOTER landing
   ============================================ */
.landing-footer {
    padding: var(--spacing-8) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.landing-footer .footer-link {
    color: var(--gray-300);
    text-decoration: underline;
}