.calculator {
  position: relative;
  isolation: isolate;
  padding: 4rem 0;
  overflow: hidden;
  background: #090d0b url("images/calculator/biochar-section-background.webp") center / cover no-repeat;
  color: #fff;
}

.calculator::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(90deg, rgba(4, 9, 7, .76) 0%, rgba(4, 9, 7, .7) 58%, rgba(4, 9, 7, .62) 100%);
}

.calculator > .wrap {
  position: relative;
  z-index: 1;
}

.calculator > .wrap > .kicker {
  color: #70dd70;
}

.calculator .display {
  font-size: clamp(2.9rem, 5.2vw, 5rem);
  color: #fff;
  text-shadow: 0 .2rem 1.1rem rgba(0, 0, 0, .35);
}

.calculator-shell {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(18rem, 1fr);
  margin-top: 1.75rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 1.25rem;
  background: #101713 url("images/calculator/biochar-section-background.webp") center / cover no-repeat;
  box-shadow: 0 1.25rem 3.5rem rgba(0, 0, 0, .32);
  backdrop-filter: blur(7px);
}

.calculator-shell .calculator-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(1.5rem, 3vw, 2rem);
  border-bottom: 0;
  color: #fff;
  background: linear-gradient(90deg, rgba(8, 14, 11, .76), rgba(8, 14, 11, .64));
  backdrop-filter: blur(2px);
}

.calculator-shell .calculator-top p {
  max-width: 38rem;
  color: rgba(255, 255, 255, .9);
}

.calculator-shell .calculator-top strong {
  display: inline-block;
  margin-bottom: .25rem;
  font-family: var(--condensed);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1;
  color: #fff;
}

.calculator-benefits-title {
  margin: 1.65rem 0 .7rem;
  font-family: var(--condensed);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #fff;
}

.calculator-benefits {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .6rem 1.25rem;
  width: 100%;
  max-width: 46rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.calculator-benefits li {
  position: relative;
  padding-left: 1.2rem;
  color: rgba(255, 255, 255, .9);
  font-size: .94rem;
  line-height: 1.35;
}

.calculator-benefits li::before {
  content: "";
  position: absolute;
  top: .48em;
  left: 0;
  width: .48rem;
  height: .48rem;
  border-radius: 50%;
  background: #00a800;
}

.calculator-open {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-top: 1.35rem;
  margin-right: 4.5rem;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
}

.calculator-open::after {
  content: "";
  position: absolute;
  left: calc(100% + 1rem);
  top: 50%;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: #00a800 url("images/ui/carousel-arrow-compact.png") center / 108% 108% no-repeat;
  box-shadow: 0 .45rem 1.25rem rgba(0, 0, 0, .18);
  transform: translate(0, -50%) rotate(180deg);
  transform-origin: center;
  animation: silvachar-calculator-arrow-pulse 1.35s ease-in-out infinite;
  pointer-events: none;
}

@keyframes silvachar-calculator-arrow-pulse {
  0%, 100% { transform: translate(0, -50%) rotate(180deg); }
  50% { transform: translate(-.35rem, -50%) rotate(180deg); }
}

.calculator-visual {
  min-height: 16rem;
  margin: 0;
  overflow: hidden;
  background: #101713;
}

.calculator-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.has-scroll-reveal .calculator-visual.reveal-on-scroll {
  opacity: 0;
  transform: scale(.9);
  transform-origin: center;
  transition: opacity .7s ease, transform 1s cubic-bezier(.2, .7, .2, 1);
  will-change: opacity, transform;
}

.has-scroll-reveal .calculator-visual.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: scale(1);
}

.calculator-dialog[hidden] { display: none; }

.calculator-dialog {
  position: fixed;
  z-index: 2147483000;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  display: grid;
  place-items: center;
  padding: clamp(.75rem, 2.5vw, 2rem);
  background: rgba(6, 18, 14, .78);
  backdrop-filter: blur(8px);
  overscroll-behavior: contain;
}

.calculator-dialog-panel {
  display: flex;
  flex-direction: column;
  width: min(1080px, 100%);
  height: min(88vh, 900px);
  overflow: hidden;
  background: #fff;
  border-radius: 1.25rem;
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, .35);
}

.calculator-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: #f9f7f1;
}

.calculator-dialog-header strong {
  font-family: var(--condensed);
  font-size: 1.35rem;
  line-height: 1;
}

.calculator-close {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  font: 700 1.5rem/1 var(--sans);
  cursor: pointer;
}

.calculator-close:hover { background: #e4ddce; }

.calculator-dialog .calculator-frame {
  flex: 1;
  width: 100%;
  height: auto;
  min-height: 0;
  border: 0;
  background: #fff;
}

html.calculator-modal-open,
body.calculator-modal-open {
  overflow: hidden;
  overscroll-behavior: none;
}

@media (max-width: 620px) {
  .calculator {
    padding: 3.25rem 0;
  }

  .calculator-shell {
    grid-template-columns: 1fr;
  }

  .calculator-shell .calculator-top {
    padding: 1.7rem;
  }

  .calculator-open {
    max-width: calc(100% - 3.75rem);
    margin-right: 3.75rem;
    white-space: normal;
  }

  .calculator-open::after {
    left: calc(100% + .65rem);
    width: 2.75rem;
    height: 2.75rem;
  }

  .calculator-visual {
    min-height: 0;
    aspect-ratio: 1 / 1;
  }

  .calculator-benefits {
    grid-template-columns: 1fr;
    gap: .55rem;
  }

  .calculator-dialog { padding: max(.35rem, env(safe-area-inset-top)) .35rem max(.35rem, env(safe-area-inset-bottom)); }
  .calculator-dialog-panel { width: 100%; height: calc(100dvh - max(.7rem, env(safe-area-inset-top) + env(safe-area-inset-bottom))); border-radius: .9rem; }
}

@media (prefers-reduced-motion: reduce) {
  .calculator-dialog { backdrop-filter: none; }
  .calculator-open::after { animation: none; }
  .has-scroll-reveal .calculator-visual.reveal-on-scroll,
  .has-scroll-reveal .calculator-visual.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
}