/* ── CALCULATOR SECTION ─────────────────────── */
.calc-section {
  background: linear-gradient(180deg, transparent 0%, rgba(0,232,122,0.025) 40%, transparent 100%);
}

.calc-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.3);
  max-width: 100%;
  box-sizing: border-box;
}

@media (max-width: 800px) {
  .calc-card { grid-template-columns: 1fr; }
}

/* ── Inputs Panel ───────────────────────────── */
.calc-inputs {
  padding: var(--space-2xl);
  border-right: 1px solid var(--border);
  box-sizing: border-box;
  min-width: 0;
}

@media (max-width: 800px) {
  .calc-inputs { border-right: none; border-bottom: 1px solid var(--border); }
}

.calc-inputs-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: var(--space-xl);
}

.calc-field {
  margin-bottom: var(--space-xl);
}

.calc-field:last-child { margin-bottom: 0; }

.calc-field-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.calc-field-header label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.calc-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--green);
  font-weight: 500;
  white-space: nowrap;
}

/* ── Slider ─────────────────────────────────── */
.calc-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: var(--border-bright);
  outline: none;
  cursor: pointer;
  position: relative;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--green);
  cursor: pointer;
  border: 2px solid var(--bg-card);
  box-shadow: 0 0 12px var(--green-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.calc-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 20px var(--green-glow);
}

.calc-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--green);
  cursor: pointer;
  border: 2px solid var(--bg-card);
  box-shadow: 0 0 12px var(--green-glow);
}

.calc-range-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-faint);
  letter-spacing: 0.04em;
}

/* ── Results Panel ──────────────────────────── */
.calc-results {
  padding: var(--space-2xl);
  background: var(--bg-2);
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  min-width: 0;
}

.calc-results-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
}

.calc-result-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
}

.calc-result-row:first-of-type { border-top: 1px solid var(--border); }

.calc-result-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
  min-width: 0;
  overflow-wrap: break-word;
}

.calc-result-desc em {
  font-style: normal;
  color: var(--text-faint);
  font-size: 0.75rem;
  display: block;
  width: 100%;
}

.calc-result-val {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── ROI Summary Box ────────────────────────── */
.calc-roi-box {
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(0,232,122,0.08) 0%, rgba(0,232,122,0.03) 100%);
  border: 1px solid var(--border-green);
  border-radius: var(--radius-lg);
  text-align: center;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-xs);
}

.roi-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
}

.roi-multiple {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--green);
  line-height: 1;
  transition: all 0.3s ease;
}

.roi-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.roi-equiv {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  min-height: 20px;
}

.calc-note {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  letter-spacing: 0.06em;
  margin-top: var(--space-sm);
}

/* ── Tooltip ────────────────────────────────── */
.tooltip-wrap {
  position: relative;
  display: inline-flex;
}

.tooltip-icon {
  color: var(--text-faint);
  font-size: 0.75rem;
  cursor: help;
  transition: color var(--transition);
}

.tooltip-icon:hover { color: var(--text-muted); }

.tooltip-text {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-1);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  max-width: 240px;
  white-space: normal;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 10;
  line-height: 1.5;
}

.tooltip-wrap:hover .tooltip-text { opacity: 1; }

/* ── MOBILE RESPONSIVE FIXES ──────────────── */
@media (max-width: 800px) {
  .calc-inputs {
    padding: var(--space-xl);
  }
  .calc-results {
    padding: var(--space-xl);
  }
}

@media (max-width: 520px) {
  .calc-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
  }
  .calc-inputs {
    padding: var(--space-md);
  }
  .calc-results {
    padding: var(--space-md);
  }
  .calc-field-header {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  .calc-field-header label {
    font-size: 0.8rem;
  }
  .calc-result-row {
    flex-direction: column;
    gap: var(--space-xs);
  }
  .calc-result-val {
    font-size: 1rem;
  }
  .roi-multiple {
    font-size: 2.2rem;
  }
  .calc-roi-box {
    padding: var(--space-md);
  }
  .tooltip-text {
    left: auto;
    right: 0;
    transform: none;
    max-width: 200px;
  }
  .calc-slider {
    width: 100%;
    min-width: 0;
  }
}

@media (max-width: 360px) {
  .calc-inputs {
    padding: var(--space-sm) var(--space-md);
  }
  .calc-results {
    padding: var(--space-sm) var(--space-md);
  }
  .calc-inputs-label,
  .calc-results-label {
    font-size: 0.6rem;
    margin-bottom: var(--space-md);
  }
  .calc-field {
    margin-bottom: var(--space-md);
  }
  .calc-val {
    font-size: 0.75rem;
  }
  .calc-result-desc {
    font-size: 0.75rem;
  }
  .calc-result-val {
    font-size: 0.9rem;
  }
  .roi-multiple {
    font-size: 1.8rem;
  }
  .calc-roi-box {
    padding: var(--space-sm);
  }
  .calc-note {
    font-size: 0.6rem;
  }
}