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**/
/* ==========================================================================
   FEUILLE DE STYLE - CALCULATEUR ET GUIDE DE CHOIX (ELECTRO MARKET)
   ========================================================================== */

:root {
  --calc-navy: #0f4c81;
  --calc-blue: #327ab4;
  --calc-dark: #1e293b;
  --calc-slate: #334155;
  --calc-muted: #64748b;
  --calc-cream: #fbf9f6;
  --calc-white: #ffffff;
  --calc-border: #e2e8f0;
  --calc-border-dark: #cbd5e1;
  
  --font-calc: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --radius-lg: 24px;
  --radius-sm: 12px;
  --shadow-calc: 0 10px 30px rgba(15, 76, 129, 0.05);
}

.calculator-page-wrapper {
  font-family: var(--font-calc);
  color: var(--calc-dark);
  line-height: 1.8;
  background-color: var(--calc-cream);
  padding-bottom: 100px;
}

/* ===== HERO SECTION ===== */
.calculator-hero {
  position: relative;
  background: var(--calc-white);
  padding: 120px 24px 100px;
  text-align: center;
  border-bottom: 1px solid var(--calc-border);
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(50, 122, 180, 0.05) 0%, transparent 80%);
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--calc-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
  position: relative;
  padding-left: 30px;
}

.hero-tag::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 2px;
  background: var(--calc-blue);
}

.calculator-hero h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.5rem);
  font-weight: 850;
  color: var(--calc-navy);
  line-height: 1.15;
  margin: 0 0 24px;
  letter-spacing: -1.5px;
}

.hero-subtitle {
  font-size: clamp(1.4rem, 2.5vw, 1.65rem);
  color: var(--calc-slate);
  line-height: 1.6;
  font-weight: 400;
  margin: 0;
  max-width: 850px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== SECTION CALCULATEUR PRINCIPAL ===== */
.calculator-section {
  max-width: 1200px;
  margin: 60px auto 0;
  padding: 0 24px;
}

.calculator-container {
  display: grid;
  grid-template-columns: 55% 45%;
  background: var(--calc-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-calc);
  border: 1px solid var(--calc-border);
  overflow: hidden;
}

/* Formulaire (Gauche) */
.calculator-form-block {
  padding: 60px;
  border-right: 1px solid var(--calc-border);
}

.calculator-form-block h2 {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--calc-navy);
  margin-top: 0;
  margin-bottom: 12px;
}

.form-instructions {
  font-size: 1.25rem;
  color: var(--calc-slate);
  margin-bottom: 32px;
}

.calculator-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-row-three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group label {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--calc-dark);
}

.calc-input {
  height: 56px;
  border: 1px solid var(--calc-border-dark);
  border-radius: var(--radius-sm);
  padding: 0 16px;
  font-size: 1.2rem;
  font-family: inherit;
  color: var(--calc-dark);
  background-color: var(--calc-cream);
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.calc-input:focus {
  border-color: var(--calc-blue);
  box-shadow: 0 0 0 3px rgba(50, 122, 180, 0.15);
}

.select-input {
  appearance: none;
  cursor: pointer;
}

.action-container {
  margin-top: 16px;
}

.btn-calc {
  background-color: var(--calc-blue);
  color: var(--calc-white);
  border: none;
  font-size: 1.3rem;
  font-weight: 700;
  padding: 16px 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  width: 100%;
}

.btn-calc:hover {
  background-color: var(--calc-navy);
}

.btn-calc:active {
  transform: scale(0.98);
}

/* Résultats (Droite) */
.calculator-result-block {
  padding: 60px;
  background-color: var(--calc-cream);
  display: flex;
  align-items: center;
}

.result-placeholder {
  text-align: center;
  width: 100%;
}

.placeholder-icon {
  font-size: 4rem;
  color: var(--calc-blue);
  margin-bottom: 24px;
}

.result-placeholder h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--calc-navy);
  margin-top: 0;
  margin-bottom: 12px;
}

.result-placeholder p {
  font-size: 1.25rem;
  color: var(--calc-muted);
  max-width: 320px;
  margin: 0 auto;
}

.result-content {
  width: 100%;
}

.result-tag {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--calc-blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.volume-badge {
  display: inline-block;
  background-color: var(--calc-white);
  border: 1px solid var(--calc-border-dark);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 32px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.metric-item {
  background-color: var(--calc-white);
  padding: 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--calc-border);
}

.metric-label {
  display: block;
  font-size: 1.15rem;
  color: var(--calc-muted);
  margin-bottom: 8px;
}

.metric-value {
  font-size: 1.85rem;
  font-weight: 850;
  color: var(--calc-navy);
}

.recommendation-divider {
  height: 1px;
  background: var(--calc-border-dark);
  margin-bottom: 32px;
}

/* Carte Produit Recommandé */
.product-recommendation-card h4 {
  font-size: 1.2rem;
  color: var(--calc-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0;
  margin-bottom: 16px;
}

.rec-product-detail {
  background-color: var(--calc-white);
  padding: 30px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--calc-blue);
}

.rec-product-detail h5 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--calc-navy);
  margin-top: 0;
  margin-bottom: 12px;
}

.rec-product-detail p {
  font-size: 1.25rem;
  color: var(--calc-slate);
  margin-bottom: 20px;
}

.rec-product-specs {
  display: flex;
  gap: 24px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--calc-blue);
  margin-bottom: 24px;
}

.btn-product-redirect {
  display: inline-block;
  background-color: var(--calc-navy);
  color: var(--calc-white);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  transition: background-color 0.2s;
  text-align: center;
}

.btn-product-redirect:hover {
  background-color: var(--calc-blue);
}

/* ===== TABLE D'ÉQUIVALENCE ===== */
.equivalence-section {
  max-width: 1200px;
  margin: 80px auto 0;
  padding: 0 24px;
}

.equivalence-section .section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

.equivalence-section h2 {
  font-size: 2.2rem;
  color: var(--calc-navy);
  font-weight: 850;
  margin-top: 0;
  margin-bottom: 12px;
}

.equivalence-section p {
  font-size: 1.35rem;
  color: var(--calc-muted);
}

.equivalence-table-container {
  background: var(--calc-white);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-calc);
  border: 1px solid var(--calc-border);
  overflow-x: auto;
}

.equivalence-table {
  width: 100%;
  border-collapse: collapse;
}

.equivalence-table th {
  padding: 18px 24px;
  text-align: left;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--calc-navy);
  border-bottom: 2px solid var(--calc-border);
}

.equivalence-table td {
  padding: 18px 24px;
  font-size: 1.25rem;
  color: var(--calc-slate);
  border-bottom: 1px solid var(--calc-border);
}

.equivalence-table tr:last-child td {
  border-bottom: none;
}

/* ===== COMPRENDRE LES TECHNOLOGIES ===== */
.tech-comparison {
  max-width: 1200px;
  margin: 80px auto 0;
  padding: 0 24px;
}

.tech-comparison h2 {
  text-align: center;
  font-size: 2.2rem;
  color: var(--calc-navy);
  font-weight: 850;
  margin-bottom: 12px;
}

.comparison-intro {
  text-align: center;
  font-size: 1.35rem;
  color: var(--calc-muted);
  margin-bottom: 50px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.comp-card {
  background: var(--calc-white);
  border-radius: var(--radius-lg);
  padding: 44px 30px;
  box-shadow: var(--shadow-calc);
  border: 1px solid var(--calc-border);
}

.comp-card h3 {
  font-size: 1.5rem;
  color: var(--calc-navy);
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 16px;
}

.comp-card p {
  font-size: 1.25rem;
  color: var(--calc-slate);
  margin: 0;
  line-height: 1.7;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 950px) {
  .calculator-container {
    grid-template-columns: 1fr;
  }
  
  .calculator-form-block {
    border-right: none;
    border-bottom: 1px solid var(--calc-border);
    padding: 40px 24px;
  }
  
  .calculator-result-block {
    padding: 40px 24px;
  }

  .equivalence-table th, 
  .equivalence-table td {
    padding: 14px 16px;
    font-size: 1.15rem;
  }
}

@media (max-width: 600px) {
  .form-row-three {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}
</style>