/* ============================================================
   VERIDIS ENERGIE — Calculateur live
   Style : instrument de précision (Bloomberg/Patek terminal)
   ============================================================ */

.calc-section {
  background: var(--ink);
  color: var(--cream);
  padding-block: clamp(var(--space-8), 10vw, var(--space-9));
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.calc-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 75% 25%, rgba(181, 115, 74, 0.16), transparent 50%),
    radial-gradient(circle at 25% 75%, rgba(14, 110, 58, 0.12), transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.calc-head {
  text-align: left;
  margin-bottom: var(--space-7);
  max-width: 720px;
}
.calc-eyebrow {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: var(--fw-semi);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper-soft);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-4);
}
.calc-eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--copper-soft);
}
.calc-head h2 {
  font-family: var(--font-display);
  font-size: var(--fs-4xl);
  font-weight: var(--fw-semi);
  letter-spacing: -0.035em;
  line-height: 1.02;
  color: var(--cream);
  margin-bottom: var(--space-3);
}
.calc-head h2 .accent { color: var(--copper-soft); }
.calc-head p {
  font-size: var(--fs-md);
  color: rgba(250, 250, 245, 0.65);
  max-width: 580px;
  line-height: var(--lh-relaxed);
}

/* GRID : inputs gauche, résultats droite */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
@media (max-width: 980px) {
  .calc-grid { grid-template-columns: 1fr; }
}

/* === INPUTS (gauche) === */
.calc-inputs {
  background: var(--ink);
  padding: var(--space-6);
}

.calc-field {
  margin-bottom: var(--space-5);
}
.calc-field:last-child { margin-bottom: 0; }

.calc-field-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-3);
}
.calc-field-name {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: var(--fw-semi);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(250, 250, 245, 0.55);
}
.calc-field-value {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-semi);
  color: var(--copper-soft);
  letter-spacing: -0.01em;
}

/* Slider — surface */
.calc-slider {
  position: relative;
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
}
.calc-slider input[type="range"] {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  border-radius: 0;
  cursor: pointer;
  margin: 0;
}
.calc-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--copper-soft);
  cursor: pointer;
  border: 3px solid var(--ink);
  box-shadow: 0 0 0 1px var(--copper-soft), 0 0 0 12px transparent; /* hit area étendue 48px */
  transition: transform var(--duration-fast);
}
.calc-slider input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.calc-slider input[type="range"]::-webkit-slider-thumb:focus {
  outline: 2px solid var(--green-accent);
  outline-offset: 2px;
}
.calc-slider input[type="range"]::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--copper-soft);
  cursor: pointer;
  border: 3px solid var(--ink);
}
/* Hauteur de la zone interactive du slider lui-même → ≥ 44px sur mobile */
.calc-slider input[type="range"] {
  padding: 16px 0; /* augmente la hit area verticale */
  background-clip: content-box;
}

/* Options (boutons radio stylés) */
.calc-options {
  display: grid;
  grid-template-columns: repeat(var(--cols, 4), 1fr);
  gap: 6px;
}
.calc-option {
  position: relative;
  padding: 12px 10px;
  min-height: 44px; /* a11y : touch target minimum */
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: 0.8rem;
  color: rgba(250, 250, 245, 0.7);
  text-align: center;
  transition: all var(--duration-base);
  line-height: 1.3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.calc-option:focus-visible {
  outline: 2px solid var(--green-accent);
  outline-offset: 2px;
}
.calc-option:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--cream);
  border-color: rgba(255, 255, 255, 0.2);
}
.calc-option.is-active {
  background: var(--copper-soft);
  color: var(--ink);
  border-color: var(--copper-soft);
}
.calc-option-small {
  display: block;
  font-size: 0.65rem;
  font-weight: var(--fw-regular);
  letter-spacing: 0.05em;
  margin-top: 2px;
  opacity: 0.7;
}

/* === RÉSULTATS (droite) === */
.calc-results {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, rgba(181, 115, 74, 0.04) 100%);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  position: relative;
}

.calc-result-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-shrink: 0;
}
.calc-result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 38px;
}
.calc-result-row:last-child { border-bottom: none; padding-bottom: 0; }

.calc-result-label {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: var(--fw-medium);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(250, 250, 245, 0.55);
  flex-shrink: 0;
  white-space: nowrap;
}
.calc-result-value {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semi);
  color: var(--cream);
  letter-spacing: -0.02em;
  transition: color var(--duration-base);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60%;
}

/* Highlight final — reste à charge énorme */
.calc-result-final {
  background: rgba(0, 0, 0, 0.3);
  padding: var(--space-5);
  margin-inline: calc(var(--space-6) * -1);
  margin-bottom: calc(var(--space-6) * -1);
  margin-top: var(--space-3);
  border-top: 1px solid rgba(181, 115, 74, 0.3);
  display: flex;
  flex-direction: column;
}
.calc-result-final-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: var(--fw-semi);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin-bottom: 6px;
}
.calc-result-final-value {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: var(--fw-semi);
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: var(--cream);
  margin-bottom: var(--space-4);
}
.calc-result-final-value .currency {
  font-size: 0.5em;
  color: var(--copper-soft);
  margin-left: 6px;
}
.calc-result-final-sub {
  font-size: 0.82rem;
  color: rgba(250, 250, 245, 0.55);
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

.calc-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 16px 24px;
  background: var(--copper-soft);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all var(--duration-base);
  text-decoration: none;
}
.calc-cta:hover {
  background: var(--cream);
  transform: translateY(-2px);
}

.calc-foot {
  margin-top: var(--space-4);
  font-size: 0.72rem;
  color: rgba(250, 250, 245, 0.45);
  text-align: center;
  line-height: 1.5;
}