#roi-calculator {
  --sf: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --sf-mono: "SF Mono", "SFMono-Regular", ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  --blue: #0EA5E9;
  --blue-dim: rgba(14,165,233,0.10);
  --blue-mid: rgba(14,165,233,0.22);
  --offwhite: #F5F3EE;
  --offwhite-dim: #EAE7E0;
  --offwhite-deeper: #D8D4CB;
  --text-dark: #1A1814;
  --text-mid: #5A564F;
  --text-light: #9A968F;
  --border: rgba(26,24,20,0.09);
  
  font-family: var(--sf);
  color: var(--text-dark);
}

#roi-calculator .header {
  text-align: center;
  margin-bottom: 3rem;
}

#roi-calculator .eyebrow {
  font-family: var(--sf-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.9rem;
  font-weight: 500;
}

#roi-calculator h2.roi-title {
  font-family: var(--sf);
  font-size: clamp(28px, 5vw, 50px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-dark);
  margin: 0;
}

#roi-calculator h2.roi-title span { color: var(--blue); }

#roi-calculator .subtitle {
  margin-top: 0.85rem;
  font-size: 15px;
  font-weight: 400;
  color: var(--text-mid);
  letter-spacing: -0.01em;
}

#roi-calculator .wrapper {
  max-width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

#roi-calculator .calc-section {
  background: #fff;
  border: 0.5px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  padding: 0;
  margin: 0;
}

#roi-calculator .section-header {
  padding: 0.9rem 1.75rem;
  background: var(--offwhite);
  border-bottom: 0.5px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

#roi-calculator .section-header.blue-bg { background: var(--blue); }
#roi-calculator .section-header.black-bg {
    background: #0a0a0a;
    border-bottom: none;
}
#roi-calculator .text-blue {
    color: var(--blue) !important;
}

#roi-calculator .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}

#roi-calculator .dot.white { background: #fff; }

#roi-calculator .sec-title {
  font-family: var(--sf);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-mid);
}

#roi-calculator .sec-title.white { color: rgba(255,255,255,0.9); }

#roi-calculator .sec-hint {
  margin-left: auto;
  font-family: var(--sf);
  font-size: 11px;
  font-weight: 400;
  color: var(--text-light);
}

#roi-calculator .sec-hint.white { color: rgba(255,255,255,0.55); }

/* Input rows */
#roi-calculator .field-row {
  display: grid;
  grid-template-columns: 1fr 220px;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.75rem;
  border-bottom: 0.5px solid var(--offwhite-dim);
  transition: background 0.15s;
}

#roi-calculator .field-row:last-child { border-bottom: none; }
#roi-calculator .field-row:hover { background: var(--offwhite); }

#roi-calculator .f-name {
  font-family: var(--sf);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-dark);
  margin-bottom: 2px;
}

#roi-calculator .f-hint {
  font-family: var(--sf);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-light);
}

#roi-calculator .f-control {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

#roi-calculator .f-input-wrap {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--offwhite);
  border: 1px solid var(--offwhite-deeper);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.15s;
}

#roi-calculator .f-input-wrap:focus-within {
  border-color: var(--blue);
  background: #fff;
}

#roi-calculator .f-prefix {
  font-family: var(--sf);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  padding: 5px 0 5px 10px;
  pointer-events: none;
  line-height: 1;
}

#roi-calculator .f-suffix {
  font-family: var(--sf);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  padding: 5px 10px 5px 0;
  pointer-events: none;
  line-height: 1;
}

#roi-calculator .f-number {
  font-family: var(--sf-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--blue);
  background: transparent;
  border: none;
  outline: none;
  width: 80px;
  padding: 5px 6px;
  text-align: right;
  -moz-appearance: textfield;
}

#roi-calculator .f-number::-webkit-inner-spin-button,
#roi-calculator .f-number::-webkit-outer-spin-button { -webkit-appearance: none; }

#roi-calculator input[type="range"] {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  height: 3px;
  background: var(--offwhite-deeper);
  border-radius: 99px;
  outline: none;
  border: none;
  cursor: pointer;
}

#roi-calculator input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--blue);
  border: 2.5px solid #fff;
  box-shadow: 0 0 0 1.5px var(--blue);
  cursor: pointer;
  transition: transform 0.15s;
}

#roi-calculator input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

#roi-calculator input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--blue);
  border: 2.5px solid #fff;
  cursor: pointer;
}

/* Calculated result rows */
#roi-calculator .calc-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.75rem;
  border-bottom: 0.5px solid var(--offwhite-dim);
}

#roi-calculator .calc-row:last-child { border-bottom: none; }

#roi-calculator .c-name {
  font-family: var(--sf);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-mid);
}

#roi-calculator .c-formula {
  font-family: var(--sf);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--text-light);
  margin-top: 2px;
}

#roi-calculator .c-val {
  font-family: var(--sf-mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-dark);
  min-width: 70px;
  text-align: right;
}

/* Revenue block */
#roi-calculator .revenue-block {
  background: var(--blue);
  padding: 2.25rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

#roi-calculator .rev-label {
  font-family: var(--sf);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-bottom: 0.5rem;
}

#roi-calculator .rev-value {
  font-family: var(--sf);
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #fff;
  line-height: 1;
}

#roi-calculator .rev-sub {
  margin-top: 0.45rem;
  font-family: var(--sf);
  font-size: 12.5px;
  font-weight: 400;
  color: rgba(255,255,255,0.6);
}

#roi-calculator .rev-right {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  align-items: flex-end;
}

#roi-calculator .rev-stat {
  font-family: var(--sf);
  font-size: 13px;
  font-weight: 400;
  color: rgba(255,255,255,0.65);
  text-align: right;
}

#roi-calculator .rev-stat strong {
  color: #fff;
  font-weight: 600;
}

#roi-calculator .footer-note {
  text-align: center;
  font-family: var(--sf);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-light);
  margin-top: 1.25rem;
  line-height: 1.7;
}

@media (max-width: 560px) {
  #roi-calculator .field-row { grid-template-columns: 1fr; }
  #roi-calculator .f-control { align-items: flex-start; }
  #roi-calculator .rev-right { align-items: flex-start; }
}

/* Side by Side Grid */
#roi-calculator .calc-grid-2 {
    display: grid;
    gap: 1.25rem;
}

#roi-calculator .sec-title-lg {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-dark);
    text-transform: none;
    letter-spacing: -0.01em;
}

@media (min-width: 992px) {
    #roi-calculator .calc-grid-2 {
        grid-template-columns: 1fr 1fr;
        gap: 2.5rem;
    }
    #roi-calculator .calc-grid-2 .field-row {
        grid-template-columns: 1fr 180px;
        gap: 1rem;
        padding: 1.25rem 1.5rem;
    }
}