:root {
  --verde: #2E7D5B;
  --verde-chiaro: #F0F8F4;
  --blu-scuro: #1A2E45;
  --giallo: #F5B14C;
  --bianco-caldo: #FAF9F5;
  --grigio-chiaro: #E5E5E5;
  --grigio-scuro: #5F5E5A;
  --testo: #1A1A1A;
}

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

body {
  font-family: 'Inter', sans-serif;
  color: var(--testo);
  background: var(--bianco-caldo);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

h1, h2, h3, h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
}

a {
  color: var(--verde);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* HEADER */
.header {
  padding: 24px 0;
  border-bottom: 1px solid var(--grigio-chiaro);
  background: white;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo {
  height: 85px;
  width: auto;
}

/* HERO */
.hero {
  padding: 100px 0 80px;
  background: linear-gradient(135deg, var(--bianco-caldo) 0%, #F0F4F0 100%);
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--blu-scuro);
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-title-accent {
  color: var(--verde);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--grigio-scuro);
  max-width: 700px;
  margin: 0 auto 36px;
}

.btn-primary {
  display: inline-block;
  background: var(--verde);
  color: white;
  padding: 16px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.05rem;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}

.btn-primary:hover {
  background: #266B4D;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary:disabled {
  background: var(--grigio-chiaro);
  color: var(--grigio-scuro);
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-block;
  background: var(--blu-scuro);
  color: white;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: #243A5C;
}

.btn-secondary:disabled {
  background: var(--grigio-chiaro);
  color: var(--grigio-scuro);
  cursor: not-allowed;
}

.btn-outline {
  display: inline-block;
  background: white;
  color: var(--grigio-scuro);
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  border: 2px solid var(--grigio-chiaro);
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
}

.btn-outline:hover {
  border-color: var(--grigio-scuro);
}

/* SECTIONS */
.problem, .solution, .configurator, .how-it-works, .faq {
  padding: 80px 0;
}

.problem { background: white; }
.solution { background: var(--bianco-caldo); }
.configurator { background: white; }
.how-it-works { background: var(--bianco-caldo); }
.faq { background: white; }

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--blu-scuro);
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--grigio-scuro);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 40px;
}

/* PROBLEM */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.problem-card {
  background: var(--bianco-caldo);
  padding: 32px 24px;
  border-radius: 12px;
  text-align: center;
}

.problem-number {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--giallo);
  margin-bottom: 12px;
}

/* SOLUTION */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.solution-card {
  background: white;
  padding: 32px 24px;
  border-radius: 12px;
  text-align: center;
}

.solution-icon {
  font-size: 2.5rem;
  color: var(--verde);
  margin-bottom: 12px;
}

.solution-card h3 {
  color: var(--blu-scuro);
  font-size: 1.3rem;
  margin-bottom: 8px;
}

/* CONFIGURATOR */
.configurator-box {
  max-width: 900px;
  margin: 0 auto;
  background: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.progress-bar {
  background: var(--grigio-chiaro);
  border-radius: 4px;
  height: 6px;
  margin-bottom: 32px;
  overflow: hidden;
}

.progress-fill {
  background: var(--verde);
  height: 100%;
  width: 0;
  transition: width 0.3s;
}

.step {
  display: none;
}

.step.active {
  display: block;
}

.step-title {
  font-size: 1.5rem;
  color: var(--blu-scuro);
  margin-bottom: 8px;
}

.step-subtitle {
  color: var(--grigio-scuro);
  margin-bottom: 24px;
}

.options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.option-card {
  display: block;
  padding: 16px;
  border: 2px solid var(--grigio-chiaro);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.option-card:hover {
  border-color: var(--verde);
}

.option-card input {
  display: none;
}

.option-card input:checked + .option-content {
  color: var(--verde);
}

.option-card:has(input:checked) {
  border-color: var(--verde);
  background: var(--verde-chiaro);
}

.option-content {
  display: block;
}

.option-content strong {
  display: block;
  color: var(--blu-scuro);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.option-content small {
  color: var(--grigio-scuro);
  font-size: 0.85rem;
}

/* FEATURES (Step 3) */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 24px;
}

.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border: 2px solid var(--grigio-chiaro);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.feature-card:hover {
  border-color: var(--verde);
}

.feature-card input {
  margin-top: 2px;
  flex-shrink: 0;
}

.feature-card:has(input:checked) {
  border-color: var(--verde);
  background: var(--verde-chiaro);
}

.feature-text {
  display: block;
}

.feature-text strong {
  color: var(--blu-scuro);
  display: block;
  margin-bottom: 2px;
}

.feature-text small {
  color: var(--grigio-scuro);
  font-size: 0.88rem;
}

.feature-text em {
  color: var(--verde);
  font-style: normal;
  font-weight: 600;
}

.saving-summary {
  background: var(--blu-scuro);
  color: white;
  padding: 18px 24px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.saving-summary strong {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.5rem;
  color: var(--giallo);
}

.step-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
}

.step-nav button {
  flex-shrink: 0;
}

/* FORM */
.form-row {
  margin-bottom: 16px;
}

.form-row label {
  display: block;
  font-weight: 600;
  color: var(--blu-scuro);
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--grigio-chiaro);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--verde);
}

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 20px 0;
  font-size: 0.9rem;
  color: var(--grigio-scuro);
}

.checkbox-row input {
  margin-top: 4px;
  flex-shrink: 0;
}

/* THANK YOU */
.thank-you {
  text-align: center;
  padding: 40px 20px;
}

.thank-you-icon {
  width: 80px;
  height: 80px;
  background: var(--verde);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto 24px;
}

.thank-you h3 {
  color: var(--blu-scuro);
  font-size: 2rem;
  margin-bottom: 16px;
}

.thank-you p {
  color: var(--grigio-scuro);
  margin-bottom: 12px;
}

/* HOW IT WORKS */
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.how-step {
  background: white;
  padding: 32px 24px;
  border-radius: 12px;
  text-align: center;
}

.how-number {
  width: 50px;
  height: 50px;
  background: var(--verde);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 16px;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.how-step h3 {
  color: var(--blu-scuro);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 40px auto 0;
}

.faq-item {
  background: var(--bianco-caldo);
  border-radius: 8px;
  margin-bottom: 12px;
  padding: 18px 24px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--blu-scuro);
  list-style: none;
}

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

.faq-item summary::before {
  content: '+ ';
  color: var(--verde);
  font-weight: 800;
  margin-right: 8px;
}

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

.faq-item p {
  margin-top: 12px;
  color: var(--grigio-scuro);
}

/* FOOTER */
.footer {
  background: var(--blu-scuro);
  color: white;
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  height: 60px;
  width: auto;
  margin-bottom: 12px;
  filter: brightness(0) invert(1);
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.85);
}

.footer h4 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--giallo);
}

.footer p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
}

.footer a {
  color: rgba(255, 255, 255, 0.95);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* === KIT CARDS (Step 4) === */
.kit-cards-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.kit-card {
  background: white;
  border: 2px solid var(--grigio-chiaro);
  border-radius: 12px;
  padding: 20px;
  position: relative;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

.kit-card:hover {
  border-color: var(--verde);
  box-shadow: 0 4px 12px rgba(46, 125, 91, 0.1);
}

.kit-raccomandato {
  border-color: var(--giallo);
  border-width: 3px;
  background: #FFFBF2;
}

.kit-selezionato {
  border-color: var(--verde) !important;
  border-width: 3px !important;
  background: #F0F8F4 !important;
}

.kit-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--giallo);
  color: var(--blu-scuro);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 16px;
  white-space: nowrap;
}

.kit-nome {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.4rem;
  color: var(--blu-scuro);
  margin: 8px 0 4px;
  font-weight: 700;
}

.kit-tagline {
  color: var(--grigio-scuro);
  font-size: 0.9rem;
  margin-bottom: 16px;
  min-height: 36px;
}

.kit-prezzo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--verde);
  margin: 8px 0 0;
}

.kit-spedizione {
  font-size: 0.85rem;
  color: var(--grigio-scuro);
  margin: 0 0 16px;
}

.kit-sezione {
  margin: 12px 0;
  font-size: 0.9rem;
}

.kit-sezione strong {
  color: var(--blu-scuro);
  display: block;
  margin-bottom: 6px;
}

.kit-sezione ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.kit-sezione li {
  padding: 4px 0;
  color: var(--grigio-scuro);
  font-size: 0.88rem;
  line-height: 1.4;
}

.btn-kit-select {
  margin-top: auto;
  padding: 12px 16px;
  border: 2px solid var(--verde);
  background: white;
  color: var(--verde);
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  font-size: 0.95rem;
}

.btn-kit-select:hover {
  background: var(--verde);
  color: white;
}

.kit-selezionato .btn-kit-select {
  background: var(--verde);
  color: white;
}

/* === ROI BOX === */
.roi-box {
  background: var(--blu-scuro);
  color: white;
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
}

.roi-header {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 16px;
  text-align: center;
  color: var(--giallo);
}

.roi-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.roi-item {
  display: flex;
  flex-direction: column;
  text-align: center;
}

.roi-label {
  font-size: 0.85rem;
  opacity: 0.85;
  margin-bottom: 4px;
}

.roi-value {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: white;
}

.roi-highlight {
  color: var(--giallo);
}

.kit-riepilogo-form {
  background: #F0F8F4;
  border-left: 4px solid var(--verde);
  padding: 14px 18px;
  border-radius: 6px;
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.kit-riepilogo-form strong {
  color: var(--blu-scuro);
}

.info-richiesta {
  background: #FFF9EC;
  border: 1px solid var(--giallo);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--grigio-scuro);
  line-height: 1.5;
  margin: 16px 0 24px;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .kit-cards-container {
    grid-template-columns: 1fr;
  }
  .roi-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1rem; }
  .section-title { font-size: 1.8rem; }
  .problem-grid, .solution-grid, .how-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .options {
    grid-template-columns: 1fr;
  }
  .configurator-box {
    padding: 24px 20px;
  }
}

@media (max-width: 600px) {
  .hero { padding: 60px 0; }
  .problem, .solution, .configurator, .how-it-works, .faq { padding: 60px 0; }
  .step-nav { flex-direction: column-reverse; }
  .step-nav button { width: 100%; }
  .saving-summary { flex-direction: column; gap: 8px; text-align: center; }
  .section-subtitle { font-size: 1rem; padding: 0 10px; }
  .logo { height: 65px; }
  .hero-title { font-size: 2rem; }
}