@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* --- CUSTOM VARIABLES & RESET --- */
:root {
  --bg-color: #F4F7FB;
  --surface-color: #FFFFFF;
  --text-primary: #0F1E36;
  --text-secondary: #4A5F73;
  --border-color: #E2E8F0;
  --accent-primary: #FF6B35;
  --accent-hover: #E85B29;
  --technical-color: #2563EB;
  --error-color: #D93025;
  --error-bg: #FCE8E6;
  --success-color: #188038;
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-sm: 8px;
  --shadow-airbnb: 0 6px 20px rgba(15, 30, 54, 0.04);
  --shadow-active: 0 10px 30px rgba(15, 30, 54, 0.08);
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*:focus-visible {
  outline: 3px solid var(--technical-color);
  outline-offset: 3px;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  background-image: 
    linear-gradient(rgba(11, 34, 64, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 34, 64, 0.02) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* --- GENERAL UTILITIES & LAYOUT --- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 6rem 0;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- STICKY NAVIGATION HEADER --- */
header.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background-color: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition-smooth);
}

header.site-nav .nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--accent-primary);
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  display: inline-block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--accent-primary);
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 30px;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-smooth);
  border: none;
  outline: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--surface-color);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.25);
}

.btn-secondary {
  background-color: var(--surface-color);
  color: var(--text-primary);
  border: 1px solid var(--text-primary);
}

.btn-secondary:hover {
  background-color: #F7F7F7;
  border-color: var(--text-primary);
}

/* --- HERO SECTION --- */
.hero-section {
  padding-top: 180px; /* Offset per header */
  padding-bottom: 6rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-content .tagline {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
  max-width: 520px;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-media {
  position: relative;
  background-color: #FFFFFF;
  padding: 16px 16px 64px 16px;
  border-radius: 8px;
  box-shadow: 0 15px 35px rgba(15, 30, 54, 0.08);
  border: 1px solid rgba(15, 30, 54, 0.05);
  transform: rotate(-1.5deg);
  transition: var(--transition-smooth);
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
}

.hero-media:hover {
  transform: translateY(-8px) rotate(1.5deg);
  box-shadow: 0 25px 50px rgba(15, 30, 54, 0.12);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  border-radius: 4px;
  display: block;
}

.hero-media::after {
  content: "Nicolò Tristano";
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  text-align: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* --- METODO SECTION --- */
.method-section {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  max-width: 650px;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.section-header .subtitle {
  font-size: 1.1rem;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.method-card {
  padding: 2.5rem;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  transition: var(--transition-smooth);
}

.method-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-airbnb);
  border-color: transparent;
  background-color: #FFFFFF;
}

.method-icon-wrapper {
  width: 48px;
  height: 48px;
  background-color: rgba(44, 94, 75, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.method-card h3 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

/* --- ABOUT SECTION --- */
.about-section {
  background-color: var(--bg-color);
}

.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 4rem;
  align-items: center;
}

.about-media {
  position: relative;
}

.about-frame {
  position: relative;
  background-color: #FFFFFF;
  padding: 16px;
  border-radius: 24px;
  box-shadow: 0 20px 45px rgba(15, 30, 54, 0.08);
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
  transform: rotate(-1.2deg);
}

.about-frame:hover {
  transform: translateY(-6px) rotate(0deg);
  box-shadow: 0 28px 55px rgba(15, 30, 54, 0.12);
}

.about-frame img {
  width: 100%;
  height: auto;
  border-radius: 14px;
  display: block;
  border: 1px solid rgba(15, 30, 54, 0.06);
}

.about-experience-badge {
  position: absolute;
  bottom: -15px;
  right: -15px;
  background-color: #0F1E36;
  color: #FFFFFF;
  padding: 12px 18px;
  border-radius: 18px;
  box-shadow: 0 10px 25px rgba(15, 30, 54, 0.25);
  display: flex;
  align-items: center;
  gap: 10px;
  border: 3px solid #FFFFFF;
  transition: var(--transition-smooth);
}

.about-frame:hover .about-experience-badge {
  transform: scale(1.05);
}

.about-experience-badge .badge-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1;
}

.about-experience-badge .badge-text {
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.25;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #F4F7FB;
}

.about-content h2 {
  font-size: 2.25rem;
  margin-bottom: 1.25rem;
}

.about-content p {
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
}

.about-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 2rem;
}

.about-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.about-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(37, 99, 235, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.about-item strong {
  display: block;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.about-item p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* --- LEAD MAGNET SECTION --- */
.lead-section {
  background-color: var(--bg-color);
}

.lead-card-container {
  background-color: var(--surface-color);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 4rem;
  box-shadow: var(--shadow-airbnb);
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 4rem;
  align-items: center;
}

.lead-preview-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 420px;
  width: 100%;
}

.material-preview-stack {
  position: relative;
  width: 100%;
  height: 100%;
}

.lead-cover {
  position: absolute;
  z-index: 2;
  left: 5%;
  top: 5%;
  max-width: 60%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(15, 30, 54, 0.15);
  transform: rotate(-5deg);
  transition: var(--transition-smooth);
}

.lead-blackboard-preview {
  position: absolute;
  z-index: 1;
  right: 5%;
  bottom: 10%;
  max-width: 70%;
  height: auto;
  border-radius: 12px;
  border: 4px solid #FFFFFF;
  box-shadow: 0 10px 30px rgba(15, 30, 54, 0.15);
  transform: rotate(5deg);
  transition: var(--transition-smooth);
}

.lead-cover:hover {
  transform: translateY(-8px) rotate(-2deg) scale(1.03);
  z-index: 3;
  box-shadow: 0 20px 45px rgba(15, 30, 54, 0.25);
}

.lead-blackboard-preview:hover {
  transform: translateY(-8px) rotate(2deg) scale(1.03);
  z-index: 3;
  box-shadow: 0 20px 45px rgba(15, 30, 54, 0.25);
}

.lead-content-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.lead-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.lead-content p {
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

.lead-tag {
  display: inline-block;
  padding: 6px 12px;
  background-color: rgba(44, 94, 75, 0.08);
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.8rem;
  border-radius: 20px;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- FORMS & VALIDATION (Modern Web Guidance) --- */
.form-group {
  position: relative;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-hint {
  display: block;
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  font-weight: 400;
}

.form-control {
  width: 100%;
  padding: 16px 20px;
  font-family: var(--font-family);
  font-size: 1rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-smooth);
}

.form-control:focus {
  border-color: var(--accent-primary);
  background-color: var(--surface-color);
  box-shadow: 0 0 0 4px rgba(44, 94, 75, 0.1);
}

/* Messaggi di errore form */
.error-msg {
  display: none;
  color: var(--error-color);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 0.5rem;
  align-items: center;
  gap: 4px;
}

/* Classi di validazione (Modern HTML5 :user-valid / :user-invalid) */
.form-control:user-invalid {
  border-color: var(--error-color);
  background-color: var(--error-bg);
}

.form-control:user-invalid + .error-msg {
  display: flex;
}

.form-control:user-valid {
  border-color: var(--success-color);
}

/* Fallback classes per JS */
.form-control.user-invalid-fallback {
  border-color: var(--error-color);
  background-color: var(--error-bg);
}

.form-control.user-invalid-fallback + .error-msg {
  display: flex;
}

.form-control.user-valid-fallback {
  border-color: var(--success-color);
}

.form-feedback {
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  margin-top: 1rem;
  display: none;
  line-height: 1.4;
  animation: fadeIn 0.3s ease;
}

.form-feedback.success {
  background-color: #E6F4EA;
  color: var(--success-color);
  border: 1px solid #A3CFBB;
  display: block;
}

.form-feedback.error {
  background-color: var(--error-bg);
  color: var(--error-color);
  border: 1px solid #F1AEB5;
  display: block;
}

/* --- SOCIAL PROOF (Testimonials Grid) --- */
.testimonials-section {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* Stile chat bubble anonimizzato di messaggi reali (whatsapp/telegram style) */
.chat-testimonial {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition-smooth);
}

.chat-testimonial:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-airbnb);
}

.chat-bubble-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 1.5rem;
}

.chat-bubble {
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 0.95rem;
  line-height: 1.4;
  max-width: 90%;
  position: relative;
}

.chat-bubble.student {
  background-color: #EBF1FF;
  color: #1E40AF;
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.chat-bubble.teacher {
  background-color: #FFF0EB;
  color: #C2410C;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.chat-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
}

.student-avatar-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  color: #FFFFFF;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.student-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.student-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- BOOKING SECTION --- */
.booking-section {
  background-color: var(--bg-color);
}

.booking-container {
  background-color: var(--surface-color);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-airbnb);
  padding: 4rem;
  max-width: 800px;
  margin: 0 auto;
}

.booking-header {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 3rem auto;
}

.scarcity-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 1.25rem;
  padding: 6px 16px;
  background-color: #FFF3EB;
  color: #C2410C;
  border: 1px solid #FFD8C2;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
}

.booking-header h2 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.service-modalities {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 2.25rem;
  text-align: left;
}

.modality-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background-color: #F8FAFC;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: var(--transition-smooth);
}

.modality-item:hover {
  background-color: #FFFFFF;
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 8px 24px rgba(15, 30, 54, 0.05);
}

.modality-icon {
  width: 44px;
  height: 44px;
  background-color: #EBF1FF;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.modality-item strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.modality-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.35;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 rgba(255, 107, 53, 0.4);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.7);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(255, 107, 53, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 107, 53, 0);
  }
}

.booking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.booking-full-width {
  grid-column: span 2;
}

.booking-submit-container {
  margin-top: 1rem;
  text-align: center;
}

/* --- FOOTER --- */
footer.site-footer {
  background-color: #FFFFFF;
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: var(--accent-primary);
}

/* --- ANIMATIONS --- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.scroll-reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* --- RESPONSIVE BREAKPOINTS --- */
@media (max-width: 991px) {
  section {
    padding: 4rem 0;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .lead-card-container {
    grid-template-columns: 1fr;
    padding: 2.5rem;
    gap: 2.5rem;
  }
  
  .lead-preview-container {
    height: 320px;
    order: -1; /* Metti l'anteprima in alto rispetto al form su schermi piccoli */
  }

  .lead-cover {
    max-width: 50%;
  }

  .lead-blackboard-preview {
    max-width: 60%;
  }
  
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.mobile-menu-toggle {
  display: none;
}

@media (max-width: 768px) {
  .scroll-reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  header.site-nav {
    height: 70px;
  }

  .mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
  }

  .mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  
  .nav-menu {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(15, 30, 54, 0.08);
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
    display: none;
  }

  .nav-menu.active {
    display: flex;
    animation: fadeIn 0.3s ease;
  }

  .nav-link {
    font-size: 1.1rem;
    padding: 8px 0;
  }

  .nav-cta {
    text-align: center;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .method-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .booking-grid {
    grid-template-columns: 1fr;
  }
  
  .service-modalities {
    grid-template-columns: 1fr;
  }
  
  .booking-full-width {
    grid-column: span 1;
  }
  
  .booking-container {
    padding: 2rem;
  }
  
  .footer-container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}