/*
 * roi-solaire.css — Calculateur ROI Solaire Québec
 * @package OFFGRID.QC
 * @version 1.1 — 1 mars 2026
 * V1.1 — Tuiles hero uniformisées (bordure néon subtile, cohérent site)
 * Dépend de style.css (variables CSS --menu-color, --menu-glow, etc.)
 */

/* ════════════════════════════════════════
   VARIABLES LOCALES
════════════════════════════════════════ */
.roi-section,
.roi-hero {
  --roi-accent:       #00ff88;
  --roi-accent-dim:   rgba(0, 255, 136, 0.12);
  --roi-accent-glow:  rgba(0, 255, 136, 0.35);
  --roi-bg:           #0a0a0a;
  --roi-bg-alt:       #111111;
  --roi-card:         #1a1a1a;
  --roi-card-border:  #2a2a2a;
  --roi-text:         #ffffff;
  --roi-text-muted:   #a0a0a0;
  --roi-hydro:        #4a9eff;
  --roi-hybride:      #00ff88;
  --roi-offgrid:      #ffc107;
  --roi-radius:       12px;
  --roi-gap:          1.5rem;
}

/* ════════════════════════════════════════
   HERO
════════════════════════════════════════ */
.roi-hero {
  background: linear-gradient(135deg, #0a0a0a 0%, #0f1a0f 50%, #0a0a0a 100%);
  padding: 5rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.roi-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,255,136,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.roi-hero-content {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.roi-hero-badge {
  display: inline-block;
  background: var(--roi-accent-dim);
  border: 1px solid var(--roi-accent);
  color: var(--roi-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.35rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.roi-hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin: 0 0 1rem;
  text-shadow:
    0 0 2px #fff,
    0 0 8px rgba(0,255,136,0.2),
    0 0 20px rgba(0,255,136,0.1);
}

.roi-accent {
  color: var(--roi-accent);
}

.roi-hero-sub {
  font-size: 1.1rem;
  color: var(--roi-text-muted);
  margin: 0 0 2rem;
  line-height: 1.6;
}

.roi-disclaimer {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: rgba(255, 193, 7, 0.08);
  border: 1px solid rgba(255, 193, 7, 0.3);
  border-radius: var(--roi-radius);
  padding: 1rem 1.25rem;
  text-align: left;
  margin: 0 auto 2rem;
  max-width: 680px;
}

.roi-disclaimer-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }

.roi-disclaimer p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
  margin: 0;
  line-height: 1.5;
}

.roi-hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--roi-accent);
  color: #000;
  font-weight: 800;
  font-size: 1rem;
  padding: 0.9rem 2.5rem;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 0 20px var(--roi-accent-glow);
  letter-spacing: 0.03em;
}

.roi-hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 30px var(--roi-accent-glow);
}

.roi-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 700px;
  margin: 3rem auto 0;
}

.roi-stat-card {
  background: var(--roi-card);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: var(--roi-radius);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.roi-stat-card.roi-stat-highlight {
  border-color: rgba(0, 255, 136, 0.15);
  background: var(--roi-card);
}

.roi-stat-card:hover {
  border-color: rgba(0, 255, 136, 0.45);
  box-shadow: 0 0 18px rgba(0, 255, 136, 0.12);
}

.roi-stat-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--roi-accent);
  line-height: 1;
}

.roi-stat-unit {
  font-size: 0.9rem;
  color: var(--roi-accent);
  font-weight: 700;
}

.roi-stat-label {
  font-size: 0.72rem;
  color: var(--roi-text-muted);
  text-align: center;
  line-height: 1.3;
  margin-top: 0.2rem;
}

.roi-divider {
  margin: 0;
}

/* ════════════════════════════════════════
   SECTIONS
════════════════════════════════════════ */
.roi-section {
  background: var(--roi-bg);
  padding: 4rem 2rem;
}

.roi-section-alt {
  background: var(--roi-bg-alt);
}

.roi-section-cta {
  background: linear-gradient(135deg, #0a0a0a 0%, #0f1a0f 100%);
  padding: 5rem 2rem;
}

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

.roi-section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.roi-step-badge {
  display: inline-block;
  background: var(--roi-accent-dim);
  border: 1px solid var(--roi-accent);
  color: var(--roi-accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.25rem 0.85rem;
  border-radius: 100px;
  margin-bottom: 0.75rem;
}

.roi-section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  margin: 0 0 0.5rem;
}

.roi-section-sub {
  font-size: 0.95rem;
  color: var(--roi-text-muted);
  margin: 0;
  max-width: 600px;
  margin: 0 auto;
}

/* ════════════════════════════════════════
   MODE TOGGLE RAPIDE / DÉTAILLÉ
════════════════════════════════════════ */
.roi-mode-toggle {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.roi-mode-btn {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  color: var(--roi-text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.roi-mode-btn.active {
  background: var(--roi-accent-dim);
  border-color: var(--roi-accent);
  color: var(--roi-accent);
}

.roi-mode-btn:hover:not(.active) {
  border-color: #444;
  color: #fff;
}

.roi-mode-panel { display: block; }
.roi-mode-panel.hidden { display: none; }

/* ════════════════════════════════════════
   INPUTS
════════════════════════════════════════ */
.roi-input-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--roi-gap);
  margin-bottom: 2rem;
}

.roi-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.roi-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
}

.roi-input-wrap {
  display: flex;
  align-items: center;
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.roi-input-wrap:focus-within {
  border-color: var(--roi-accent);
}

.roi-input-prefix,
.roi-input-suffix {
  padding: 0 0.75rem;
  font-size: 0.85rem;
  color: var(--roi-text-muted);
  background: #222;
  align-self: stretch;
  display: flex;
  align-items: center;
  border-right: 1px solid var(--roi-card-border);
}

.roi-input-suffix {
  border-right: none;
  border-left: 1px solid var(--roi-card-border);
}

.roi-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  outline: none;
  font-family: inherit;
}

.roi-select {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  color: #fff;
  font-size: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
  font-family: inherit;
  width: 100%;
}

.roi-select:focus {
  border-color: var(--roi-accent);
}

.roi-input-hint {
  font-size: 0.75rem;
  color: var(--roi-text-muted);
  font-style: italic;
}

/* ════════════════════════════════════════
   MODE DÉTAILLÉ — APPAREILS
════════════════════════════════════════ */
.roi-detail-intro {
  font-size: 0.9rem;
  color: var(--roi-text-muted);
  margin-bottom: 1.5rem;
}

.roi-appareils-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.roi-appareil-item {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.roi-appareil-item.active {
  border-color: var(--roi-accent);
  background: var(--roi-accent-dim);
}

.roi-appareil-check {
  width: 18px;
  height: 18px;
  accent-color: var(--roi-accent);
  cursor: pointer;
  flex-shrink: 0;
}

.roi-appareil-info {
  flex: 1;
}

.roi-appareil-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
}

.roi-appareil-watts {
  font-size: 0.72rem;
  color: var(--roi-text-muted);
}

.roi-appareil-heures {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.roi-appareil-heures input {
  width: 45px;
  background: #222;
  border: 1px solid #333;
  color: #fff;
  font-size: 0.8rem;
  padding: 0.3rem 0.4rem;
  border-radius: 4px;
  text-align: center;
  font-family: inherit;
}

.roi-appareil-heures span {
  font-size: 0.72rem;
  color: var(--roi-text-muted);
}

.roi-appareils-total {
  background: var(--roi-card);
  border: 1px solid var(--roi-accent);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--roi-text-muted);
}

.roi-appareils-total strong {
  font-size: 1.2rem;
  color: var(--roi-accent);
}

/* ════════════════════════════════════════
   RÉSULTAT CONSOMMATION
════════════════════════════════════════ */
.roi-result-card {
  background: linear-gradient(135deg, #1a1a1a, #0f1a0f);
  border: 1px solid var(--roi-accent);
  border-radius: var(--roi-radius);
  padding: 1.5rem 2rem;
  box-shadow: 0 0 30px rgba(0,255,136,0.08);
}

.roi-result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  text-align: center;
}

.roi-result-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.roi-result-label {
  font-size: 0.75rem;
  color: var(--roi-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.roi-result-value {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}

.roi-result-value.roi-accent {
  color: var(--roi-accent);
  font-size: 1.5rem;
}

/* ════════════════════════════════════════
   SYSTÈME RECOMMANDÉ — CARDS
════════════════════════════════════════ */
.roi-systeme-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--roi-gap);
  margin-bottom: 2rem;
}

.roi-systeme-card {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s;
}

.roi-systeme-card.recommande {
  border-color: var(--roi-accent);
  background: linear-gradient(135deg, #1a1a1a, #0f1a0f);
  box-shadow: 0 0 25px rgba(0,255,136,0.1);
  position: relative;
}

.roi-systeme-card.recommande::before {
  content: '⭐ RECOMMANDÉ';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--roi-accent);
  color: #000;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.75rem;
  border-radius: 100px;
  white-space: nowrap;
}

.roi-systeme-icon {
  font-size: 2rem;
  text-align: center;
}

.roi-systeme-name {
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
  text-align: center;
}

.roi-systeme-desc {
  font-size: 0.8rem;
  color: var(--roi-text-muted);
  text-align: center;
  line-height: 1.4;
}

.roi-systeme-specs {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.roi-systeme-specs li {
  font-size: 0.8rem;
  color: #ccc;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
}

.roi-systeme-specs li::before {
  content: '→';
  color: var(--roi-accent);
  flex-shrink: 0;
}

.roi-systeme-price {
  text-align: center;
  margin-top: auto;
}

.roi-systeme-price-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--roi-accent);
}

.roi-systeme-price-sub {
  font-size: 0.72rem;
  color: var(--roi-text-muted);
  display: block;
  margin-top: 0.1rem;
}

.roi-calcul-btn-wrap {
  text-align: center;
}

.roi-calcul-btn {
  background: var(--roi-accent);
  color: #000;
  font-weight: 800;
  font-size: 1.05rem;
  padding: 1rem 3rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 0 20px var(--roi-accent-glow);
  letter-spacing: 0.05em;
  font-family: inherit;
}

.roi-calcul-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 35px var(--roi-accent-glow);
}

/* ════════════════════════════════════════
   TABLEAU COMPARATIF
════════════════════════════════════════ */
.roi-table-wrap {
  overflow-x: auto;
  margin-bottom: 2.5rem;
  border-radius: var(--roi-radius);
  border: 1px solid var(--roi-card-border);
}

.roi-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.roi-table thead tr {
  background: #1a1a1a;
}

.roi-table th {
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-align: center;
  border-bottom: 2px solid var(--roi-card-border);
  color: #fff;
}

.roi-table th:first-child { text-align: left; }

.roi-col-hydro { color: var(--roi-hydro) !important; }
.roi-col-hybride { color: var(--roi-hybride) !important; }
.roi-col-offgrid { color: var(--roi-offgrid) !important; }

.roi-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid #1e1e1e;
  color: #ccc;
  text-align: center;
  vertical-align: middle;
}

.roi-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: #fff;
}

.roi-table tbody tr:hover {
  background: rgba(255,255,255,0.02);
}

.roi-table tbody tr:last-child td {
  border-bottom: none;
  font-weight: 700;
  color: #fff;
  font-size: 1rem;
  background: #1a1a1a;
}

.roi-td-best {
  color: var(--roi-accent) !important;
  font-weight: 700 !important;
}

.roi-td-hydro { color: var(--roi-hydro) !important; }
.roi-td-hybride { color: var(--roi-hybride) !important; }
.roi-td-offgrid { color: var(--roi-offgrid) !important; }

/* ════════════════════════════════════════
   GRAPHIQUE
════════════════════════════════════════ */
.roi-graph-section {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  padding: 2rem;
  margin-bottom: 2rem;
}

.roi-graph-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  text-align: center;
  margin: 0 0 1.5rem;
}

.roi-graph-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
}

#roi-canvas {
  width: 100% !important;
  height: auto !important;
  display: block;
}

.roi-graph-legend {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
}

.roi-legend-item {
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.roi-legend-item::before {
  content: '';
  width: 20px;
  height: 3px;
  border-radius: 2px;
  display: inline-block;
}

.roi-legend-hydro::before { background: var(--roi-hydro); }
.roi-legend-hybride::before { background: var(--roi-hybride); }
.roi-legend-offgrid::before { background: var(--roi-offgrid); }

/* ════════════════════════════════════════
   RECOMMANDATION PERSONNALISÉE
════════════════════════════════════════ */
.roi-recommandation {
  border-radius: var(--roi-radius);
  padding: 1.75rem 2rem;
  border-left: 4px solid var(--roi-accent);
  background: var(--roi-accent-dim);
  font-size: 0.95rem;
  line-height: 1.6;
  color: #fff;
}

.roi-recommandation h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--roi-accent);
  margin: 0 0 0.75rem;
}

/* ════════════════════════════════════════
   CO2 & SUBVENTIONS
════════════════════════════════════════ */
.roi-two-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--roi-gap);
}

.roi-card {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.roi-card-icon { font-size: 2.5rem; text-align: center; }

.roi-card-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  text-align: center;
  margin: 0;
}

.roi-co2-result {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.roi-co2-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.75rem;
  background: #222;
  border-radius: 6px;
}

.roi-co2-val {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--roi-accent);
}

.roi-co2-label {
  font-size: 0.78rem;
  color: var(--roi-text-muted);
}

.roi-co2-note {
  font-size: 0.78rem;
  color: var(--roi-text-muted);
  font-style: italic;
  line-height: 1.5;
  padding: 0.75rem;
  background: rgba(255,193,7,0.05);
  border: 1px solid rgba(255,193,7,0.15);
  border-radius: 6px;
}

.roi-subventions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.roi-subvention-item {
  background: #222;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.roi-subvention-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.roi-subvention-flag { font-size: 1rem; }

.roi-subvention-name {
  font-size: 0.83rem;
  font-weight: 600;
  color: #fff;
}

.roi-subvention-amount {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--roi-accent);
}

.roi-subvention-link {
  font-size: 0.75rem;
  color: var(--roi-text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.roi-subvention-link:hover { color: var(--roi-accent); }

.roi-subvention-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1rem;
  background: var(--roi-accent-dim);
  border: 1px solid var(--roi-accent);
  border-radius: 8px;
  font-size: 0.88rem;
  color: #fff;
}

.roi-subvention-total strong {
  color: var(--roi-accent);
  font-size: 1rem;
}

/* ════════════════════════════════════════
   MÉSURAGE NET
════════════════════════════════════════ */
.roi-mesurage-wrap {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.roi-mesurage-steps {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.roi-mesurage-step {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 160px;
  max-width: 220px;
}

.roi-mesurage-step.roi-step-final {
  border-color: var(--roi-accent);
  background: var(--roi-accent-dim);
}

.roi-step-num {
  width: 32px;
  height: 32px;
  background: var(--roi-accent);
  color: #000;
  font-weight: 900;
  font-size: 0.9rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.roi-step-text {
  font-size: 0.78rem;
  color: #ccc;
  line-height: 1.4;
}

.roi-mesurage-arrow {
  font-size: 1.2rem;
  color: var(--roi-accent);
  font-weight: 700;
}

.roi-mesurage-notes {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-start;
}

.roi-note {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: #ccc;
  line-height: 1.5;
  padding: 0.75rem 1rem;
  background: #1a1a1a;
  border-radius: 8px;
  border: 1px solid #2a2a2a;
  width: 100%;
}

.roi-note.roi-note-warning {
  border-color: rgba(255,193,7,0.3);
  background: rgba(255,193,7,0.05);
}

.roi-link-btn {
  display: inline-flex;
  align-items: center;
  background: var(--roi-accent-dim);
  border: 1px solid var(--roi-accent);
  color: var(--roi-accent);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.roi-link-btn:hover {
  background: var(--roi-accent);
  color: #000;
}

/* ════════════════════════════════════════
   FAQ
════════════════════════════════════════ */
.roi-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.roi-faq-item {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  overflow: hidden;
}

.roi-faq-question {
  width: 100%;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 1.1rem 1.25rem;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: inherit;
  transition: color 0.2s;
}

.roi-faq-question:hover { color: var(--roi-accent); }

.roi-faq-chevron {
  font-size: 0.7rem;
  color: var(--roi-accent);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.roi-faq-item.open .roi-faq-chevron {
  transform: rotate(180deg);
}

.roi-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.2s ease;
  padding: 0 1.25rem;
}

.roi-faq-item.open .roi-faq-answer {
  max-height: 300px;
  padding: 0 1.25rem 1.25rem;
}

.roi-faq-answer p {
  font-size: 0.88rem;
  color: var(--roi-text-muted);
  line-height: 1.6;
  margin: 0;
  border-top: 1px solid #2a2a2a;
  padding-top: 1rem;
}

/* ════════════════════════════════════════
   RÉFÉRENCES
════════════════════════════════════════ */
.roi-refs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--roi-gap);
  margin-bottom: 2rem;
}

.roi-ref-group {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.roi-ref-group-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--roi-accent);
  margin: 0 0 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #2a2a2a;
}

.roi-ref-link {
  font-size: 0.82rem;
  color: var(--roi-text-muted);
  text-decoration: none;
  transition: color 0.2s;
  padding: 0.2rem 0;
}

.roi-ref-link:hover { color: var(--roi-accent); }

.roi-data-sources {
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  border-radius: var(--roi-radius);
  padding: 1.5rem 2rem;
}

.roi-data-sources h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--roi-accent);
  margin: 0 0 1rem;
}

.roi-sources-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.4rem;
}

.roi-sources-list li {
  font-size: 0.78rem;
  color: var(--roi-text-muted);
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  line-height: 1.4;
}

.roi-sources-list li::before {
  content: '•';
  color: var(--roi-accent);
  flex-shrink: 0;
}

/* ════════════════════════════════════════
   CTA FINAL
════════════════════════════════════════ */
.roi-cta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--roi-gap);
  margin-bottom: 2.5rem;
}

.roi-cta-card {
  background: var(--roi-card);
  border: 1px solid var(--roi-card-border);
  border-radius: var(--roi-radius);
  padding: 2rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  transition: border-color 0.2s;
}

.roi-cta-card.roi-cta-featured {
  border-color: var(--roi-accent);
  background: linear-gradient(135deg, #1a1a1a, #0f1a0f);
  box-shadow: 0 0 25px rgba(0,255,136,0.1);
}

.roi-cta-icon { font-size: 2.5rem; }

.roi-cta-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  margin: 0;
}

.roi-cta-card p {
  font-size: 0.82rem;
  color: var(--roi-text-muted);
  margin: 0;
  line-height: 1.5;
}

.roi-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
  margin-top: auto;
  letter-spacing: 0.02em;
}

.roi-cta-primary {
  background: transparent;
  border: 1px solid var(--roi-accent);
  color: var(--roi-accent);
}

.roi-cta-primary:hover {
  background: var(--roi-accent);
  color: #000;
}

.roi-cta-accent {
  background: var(--roi-accent);
  color: #000;
  border: 1px solid transparent;
  box-shadow: 0 0 15px var(--roi-accent-glow);
}

.roi-cta-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 25px var(--roi-accent-glow);
}

.roi-contact-cta {
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.roi-contact-cta p {
  color: var(--roi-text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* ════════════════════════════════════════
   LIEN NAV — ROI SOLAIRE (style.css injecte via functions.php)
════════════════════════════════════════ */
.nav-roi-link {
  color: var(--menu-color) !important;
  font-weight: 700 !important;
  border: 1px solid var(--menu-color) !important;
  border-radius: 6px !important;
  padding: 0.2rem 0.6rem !important;
}

/* ════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════ */
@media (max-width: 900px) {
  .roi-hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }

  .roi-systeme-cards {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto 2rem;
  }

  .roi-two-cols {
    grid-template-columns: 1fr;
  }

  .roi-refs-grid {
    grid-template-columns: 1fr;
  }

  .roi-cta-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto 2.5rem;
  }

  .roi-sources-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 650px) {
  .roi-hero { padding: 4rem 1.25rem 3rem; }
  .roi-section { padding: 3rem 1.25rem; }
  .roi-section-cta { padding: 3.5rem 1.25rem; }

  .roi-hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
  }

  .roi-stat-num { font-size: 1.2rem; }
  .roi-stat-label { font-size: 0.65rem; }

  .roi-input-grid { grid-template-columns: 1fr; }
  .roi-result-grid { grid-template-columns: 1fr; gap: 0.75rem; }

  .roi-mode-toggle { flex-direction: column; align-items: stretch; }

  .roi-mesurage-steps { flex-direction: column; align-items: stretch; }
  .roi-mesurage-step { max-width: 100%; }
  .roi-mesurage-arrow { text-align: center; transform: rotate(90deg); }

  .roi-table { font-size: 0.78rem; }
  .roi-table th, .roi-table td { padding: 0.65rem 0.6rem; }

  .roi-graph-legend { gap: 1rem; font-size: 0.72rem; }
}

@media (max-width: 400px) {
  .roi-hero-stats { gap: 0.4rem; }
  .roi-stat-card { padding: 0.85rem 0.5rem; }
  .roi-stat-num { font-size: 1rem; }
}