/**
 * NextStep Landing Page Styles
 * Optimized with Design System + Micro-interactions + Performance
 * 
 * Performance Optimizations:
 * - Lazy loading images
 * - Scroll-triggered animations with IntersectionObserver
 * - CSS will-change for smooth animations
 * - Debounced scroll handlers
 * - Optimized transitions
 */

/* ========================================
   HERO SECTION - Responsive & Modern
   ======================================== */

.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    padding: var(--space-16) 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 217, 163, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.hero > .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: var(--font-extrabold);
    line-height: 1.1;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-cta .btn {
    min-height: 52px;
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.hero-cta .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.hero-cta .btn:hover::before {
    width: 300px;
    height: 300px;
}

.hero-cta .btn-primary {
    background: var(--primary-gradient, linear-gradient(135deg, #6EA8FF 0%, #5A8FE6 100%)) !important;
    background-color: var(--primary, #6EA8FF) !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 14px rgba(110, 168, 255, 0.4) !important;
    font-weight: 600 !important;
}

.hero-cta .btn-primary:hover {
    background: var(--primary-hover, #5A8FE6) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(110, 168, 255, 0.5) !important;
    color: white !important;
}

.hero-cta .btn-primary svg {
    color: white !important;
    fill: white !important;
}

.hero-cta .btn-secondary {
    background: var(--surface-elevated);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

.hero-cta .btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* Quick Login Card */
.hero .card {
    animation: fadeInRight 0.8s ease-out 0.6s both;
    backdrop-filter: blur(10px);
}

/* ========================================
   TRUST BADGES SECTION
   ======================================== */

.trust-badges {
    padding: var(--space-12) 0;
    background: var(--bg-secondary, #F3F2EE);
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

.trust-stat {
    text-align: center;
    padding: var(--space-4);
    transition: transform var(--transition-base);
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

.trust-stat:hover {
    transform: translateY(-4px);
}

.trust-stat h3 {
    font-size: var(--text-3xl, 2rem);
    font-weight: var(--font-bold, 700);
    color: var(--primary, #6EA8FF) !important;
    margin-bottom: var(--space-2);
    opacity: 1 !important;
}

.trust-stat small {
    color: var(--text-secondary, #4a5568) !important;
    font-size: var(--text-sm, 0.875rem);
    opacity: 1 !important;
}

/* Forza la visibilità immediata dei trust-stat */
.trust-stat.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

.trust-stat.fade-in-on-scroll.visible,
.trust-stat.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

/* Assicura che il testo nella sezione trust-badges sia visibile */
.trust-badges .text-muted,
.trust-badges p.text-muted {
    color: #4b5563 !important;
    opacity: 1 !important;
}

/* Final CTA Section - Forza visibilità */
section.py-5 .card.card-elevated.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

section.py-5 .card.card-elevated.fade-in-on-scroll.visible,
section.py-5 .card.card-elevated.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

/* Assicura che i testi nella Final CTA siano visibili */
.card.card-elevated h2,
.card.card-elevated p,
.card.card-elevated .btn {
    opacity: 1 !important;
    visibility: visible !important;
}

.card.card-elevated h2 {
    color: white !important;
}

.card.card-elevated p {
    color: rgba(255, 255, 255, 0.9) !important;
}

/* Assicura che il pulsante nella Final CTA sia visibile */
.card.card-elevated .btn-primary {
    background: white !important;
    color: var(--primary, #6EA8FF) !important;
    border: none !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.card.card-elevated .btn-primary svg {
    fill: var(--primary, #6EA8FF) !important;
    color: var(--primary, #6EA8FF) !important;
}

/* ========================================
   FEATURES SECTION - Scroll Animations
   ======================================== */

.features {
    padding: var(--space-16) 0;
    background: var(--bg-primary);
}

.feature-card {
    height: 100%;
    padding: var(--space-8);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: var(--border-radius-xl, 20px);
    background: var(--surface-elevated, #ffffff);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    color: var(--text-primary, #1a202c) !important;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    background: var(--primary-light);
    border-radius: var(--border-radius-xl);
    margin-bottom: var(--space-6);
    transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card .card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-4);
    color: var(--text-primary) !important;
}

.feature-card .card-text {
    color: var(--text-secondary) !important;
    line-height: 1.7;
    margin-bottom: var(--space-4);
    opacity: 1 !important;
}

.feature-card ul li {
    color: var(--text-secondary) !important;
    padding-left: var(--space-2);
    position: relative;
    opacity: 1 !important;
}

/* ========================================
   PRICING SECTION
   ======================================== */

.pricing-card {
    padding: var(--space-8);
    border: 2px solid var(--border-color, #e2e8f0);
    border-radius: var(--border-radius-2xl, 24px);
    background: var(--surface-elevated, #ffffff);
    transition: all var(--transition-base);
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    opacity: 1 !important;
    visibility: visible !important;
    color: var(--text-primary, #1a202c) !important;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, var(--surface-elevated) 0%, rgba(0, 217, 163, 0.05) 100%);
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-2xl) var(--border-radius-2xl) 0 0;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: var(--space-6);
    background: var(--primary-gradient);
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--border-radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-card h3 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.price {
    font-size: var(--text-5xl);
    font-weight: var(--font-extrabold);
    color: var(--text-primary);
    line-height: 1;
}

.price-period {
    font-size: var(--text-base);
    color: var(--text-secondary);
    margin-left: var(--space-2);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: var(--space-6) 0;
    flex-grow: 1;
}

.pricing-features li {
    padding: var(--space-3) 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    padding-left: var(--space-6);
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: var(--font-bold);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */

.testimonial {
    padding: var(--space-8);
    border-radius: var(--border-radius-xl, 20px);
    background: var(--surface-elevated, #ffffff);
    border: 1px solid var(--border-color, #e2e8f0);
    height: 100%;
    transition: all var(--transition-base);
    position: relative;
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    color: var(--text-primary, #1a202c) !important;
}

.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.testimonial-text {
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    font-style: italic;
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-full);
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.testimonial-author {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

/* ========================================
   FAQ SECTION
   ======================================== */

.accordion-item {
    background: var(--surface-elevated);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-4);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.accordion-button {
    background: var(--surface-elevated);
    color: var(--text-primary);
    font-weight: var(--font-semibold);
    border: none;
    padding: var(--space-5);
}

.accordion-button:not(.collapsed) {
    background: var(--primary-light);
    color: var(--primary);
}

.accordion-button:focus {
    box-shadow: 0 0 0 3px rgba(0, 217, 163, 0.1);
    border-color: var(--primary);
}

.accordion-body {
    padding: var(--space-5);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   ANIMATIONS - Scroll Triggered
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scroll-triggered animations */
.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    /* Fallback: mostra gli elementi dopo 0.5s se l'animazione non si attiva */
    animation: forceVisible 0.1s ease-out 0.5s forwards;
}

.fade-in-on-scroll.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
    animation: none !important;
}

@keyframes forceVisible {
    to {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }
}

/* Assicura che le feature cards siano sempre visibili */
.feature-card.fade-in-on-scroll {
    min-height: 300px;
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

.feature-card.fade-in-on-scroll.visible,
.feature-card.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

/* Forza la visibilità immediata delle feature cards */
.card.feature-card {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

/* Forza la visibilità immediata delle pricing cards */
.pricing-card.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: flex !important;
    transform: translateY(0) !important;
}

.pricing-card.fade-in-on-scroll.visible,
.pricing-card.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: flex !important;
    transform: translateY(0) !important;
}

/* Forza la visibilità immediata dei testimonial */
.testimonial.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

.testimonial.fade-in-on-scroll.visible,
.testimonial.fade-in-on-scroll {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
    transform: translateY(0) !important;
}

/* Assicura che i testi nelle pricing cards siano visibili */
.pricing-card h3,
.pricing-card .price,
.pricing-card .price-period,
.pricing-card .pricing-features li {
    color: var(--text-primary, #1a202c) !important;
    opacity: 1 !important;
}

.pricing-card .pricing-features li {
    color: var(--text-secondary, #4a5568) !important;
}

/* Assicura che i testi nei testimonial siano visibili */
.testimonial-text,
.testimonial-author {
    color: var(--text-primary, #1a202c) !important;
    opacity: 1 !important;
}

.testimonial-text {
    color: var(--text-secondary, #4a5568) !important;
}

/* ========================================
   PERFORMANCE OPTIMIZATIONS
   ======================================== */

/* Lazy loading images */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Will-change for animations */
.feature-card,
.pricing-card,
.testimonial {
    will-change: transform;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: var(--space-12) 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .feature-card,
    .pricing-card,
    .testimonial {
        margin-bottom: var(--space-6);
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .trust-stat {
        margin-bottom: var(--space-4);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .price {
        font-size: var(--text-4xl);
    }
}

/* ========================================
   LIGHT MODE OVERRIDES
   ======================================== */

/* Assicura che text-muted sia visibile in light mode */
.text-muted,
p.text-muted,
section .text-muted,
.container .text-muted,
#features .text-muted,
#pricing .text-muted,
#testimonials .text-muted {
    color: #4b5563 !important;
    opacity: 1 !important;
    font-size: 1.125rem !important;
}

/* Assicura che i paragrafi con text-muted siano visibili */
section p.text-muted {
    color: #4b5563 !important;
    opacity: 1 !important;
}

/* Assicura che le sezioni siano visibili */
#features,
#pricing,
#testimonials,
section.features,
section#pricing,
section#testimonials {
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

/* Assicura che i contenuti delle sezioni siano visibili */
#features .container,
#pricing .container,
#testimonials .container,
section.features .container,
section#pricing .container,
section#testimonials .container {
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

/* Assicura che tutti i testi nelle sezioni siano visibili */
#features p,
#pricing p,
#testimonials p,
section.features p,
section#pricing p,
section#testimonials p {
    color: var(--text-primary) !important;
    opacity: 1 !important;
}

#features p.text-muted,
#pricing p.text-muted,
#testimonials p.text-muted {
    color: #4b5563 !important;
    opacity: 1 !important;
}

/* Assicura che bg-light sia visibile */
.bg-light {
    background-color: #f9fafb !important;
}

/* Assicura che i pulsanti siano visibili */
.btn-primary {
    color: white !important;
    background: var(--primary-gradient) !important;
    border-color: var(--primary-color) !important;
}

.navbar .btn-primary {
    color: white !important;
    background: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

/* ========================================
   DARK MODE OVERRIDES
   ======================================== */

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

[data-theme="dark"] .hero::before {
    background: radial-gradient(circle at 20% 50%, rgba(0, 217, 163, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(102, 126, 234, 0.15) 0%, transparent 50%);
}

/* Testo nella hero section in modalità scura - deve essere bianco */
[data-theme="dark"] .hero .text-muted,
[data-theme="dark"] .hero p.text-muted,
[data-theme="dark"] .hero .text-muted.small,
[data-theme="dark"] .hero-cta + p.text-muted,
[data-theme="dark"] .hero-cta ~ p.text-muted,
[data-theme="dark"] .hero p.text-muted.small,
[data-theme="dark"] .hero p.mt-4.text-muted.small {
    color: rgba(255, 255, 255, 0.9) !important;
    opacity: 1 !important;
}

/* Testo nella sezione trust-badges in modalità scura - deve essere bianco */
[data-theme="dark"] .trust-badges .text-muted,
[data-theme="dark"] .trust-badges p.text-muted,
[data-theme="dark"] .trust-badges .text-muted.small,
[data-theme="dark"] .trust-badges p.text-muted.small {
    color: rgba(255, 255, 255, 0.9) !important;
    opacity: 1 !important;
}

/* Small text-muted in modalità scura - più chiaro ma non completamente bianco */
[data-theme="dark"] small.text-muted,
[data-theme="dark"] .testimonial small.text-muted,
[data-theme="dark"] .trust-stat small.text-muted,
[data-theme="dark"] #testimonials small.text-muted {
    color: rgba(255, 255, 255, 0.7) !important;
    opacity: 1 !important;
}

[data-theme="dark"] .feature-card,
[data-theme="dark"] .pricing-card,
[data-theme="dark"] .testimonial {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

[data-theme="dark"] .pricing-card.featured {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(0, 217, 163, 0.1) 100%);
}

[data-theme="dark"] .accordion-item {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

[data-theme="dark"] .accordion-button {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
    background: rgba(0, 217, 163, 0.2);
    color: var(--primary);
}