/* ROI Calculator — styled to match the rest of the site: same tokens
   (--sc-canvas/surface/ink/accent), same type pair (Archivo/IBM Plex Sans),
   single accent colour. No separate palette, no separate fonts. */

.calc-section { background: var(--ground-cover); }

.calc {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2rem);
  align-items: start;
}

.calc__panel {
  background: var(--sc-surface);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: clamp(1.75rem, 3.5vw, 2.75rem);
}

/* ---- input panel --------------------------------------------------- */

.calc__panel--inputs { display: grid; gap: clamp(1.5rem, 3vw, 2rem); }
.calc__field { display: grid; gap: 0.6rem; }
.calc__row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }

.calc__label { font-family: var(--sc-font-text); font-weight: 600; font-size: 0.9375rem; color: var(--sc-ink); }
.calc__help { font-size: 0.8125rem; color: var(--sc-ink-soft); margin: 0; }
.calc__value { font-family: var(--font-mono); font-weight: 500; font-size: 1rem; color: var(--sc-accent); font-variant-numeric: tabular-nums; }

.calc__currency { display: inline-flex; border: 1px solid var(--hairline); border-radius: 4px; overflow: hidden; width: fit-content; }
.calc__currency-btn {
  border: 0; background: transparent; color: var(--sc-ink-soft);
  font-family: var(--font-mono); font-weight: 500; font-size: 0.9375rem;
  padding: 0.5em 1.1em; cursor: pointer;
  transition: background 140ms var(--sc-ease-out), color 140ms var(--sc-ease-out);
  border-right: 1px solid var(--hairline);
}
.calc__currency-btn:last-child { border-right: 0; }
.calc__currency-btn.is-active { background: var(--sc-accent); color: var(--sc-accent-ink); }
.calc__currency-btn:focus-visible { outline: 2px solid var(--sc-accent); outline-offset: 2px; }

.calc__number {
  display: flex; align-items: center; gap: 0.5rem;
  background: color-mix(in oklab, var(--sc-canvas) 40%, transparent);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 0.7em 0.9em;
}
.calc__prefix { font-family: var(--font-mono); color: var(--sc-ink-soft); }
.calc__number input {
  border: 0; background: transparent; outline: none;
  font-family: var(--sc-font-display); font-weight: 700; font-size: 1.125rem;
  color: var(--sc-ink); width: 100%;
  font-variant-numeric: tabular-nums;
}
.calc__number:focus-within { border-color: var(--sc-accent); }

.calc__field input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px; border-radius: 2px;
  background: var(--hairline);
  margin: 0.3rem 0;
}
.calc__field input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--sc-accent);
  border: 3px solid var(--sc-surface);
  box-shadow: 0 1px 4px rgba(0,0,0,0.35);
  cursor: pointer;
}
.calc__field input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--sc-accent);
  border: 3px solid var(--sc-surface);
  cursor: pointer;
}
.calc__field input[type="range"]:focus-visible { outline: 2px solid var(--sc-accent); outline-offset: 4px; }

/* ---- result panel ---------------------------------------------------- */

.calc__panel--results { position: sticky; top: clamp(1rem, 4vh, 3rem); }

.calc__result-label { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--sc-ink-soft); margin: 0; }
.calc__hero {
  font-family: var(--sc-font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--sc-accent);
  margin: 0.2rem 0 clamp(1.5rem, 3vw, 2rem);
  font-variant-numeric: tabular-nums;
  transition: color 200ms var(--sc-ease-out);
}
.calc__hero.is-negative { color: color-mix(in oklab, var(--sc-accent) 55%, #B3453A 45%); }

.calc__bars { display: grid; gap: 0.9rem; margin-bottom: clamp(1.5rem, 3vw, 2rem); }
.calc__bar-row { display: grid; gap: 0.4rem; }
.calc__bar-track { height: 10px; border-radius: 5px; background: color-mix(in oklab, var(--sc-canvas) 55%, transparent); overflow: hidden; }
.calc__bar { height: 100%; border-radius: 5px; width: 0%; transition: width 260ms var(--sc-ease-out); }
.calc__bar--value { background: var(--sc-accent); }
.calc__bar--cost { background: var(--sc-ink-soft); }
.calc__bar-text { display: flex; justify-content: space-between; font-size: 0.875rem; color: var(--sc-ink-soft); }
.calc__bar-text b { font-family: var(--sc-font-display); font-weight: 600; color: var(--sc-ink); font-variant-numeric: tabular-nums; }

.calc__stats {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1rem;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding-block: clamp(1.25rem, 3vw, 1.75rem);
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
}
.calc__stat { display: grid; gap: 0.25rem; }
.calc__stat b { font-family: var(--sc-font-display); font-weight: 700; font-size: 1.375rem; color: var(--sc-ink); font-variant-numeric: tabular-nums; }
.calc__stat span { font-size: 0.8125rem; color: var(--sc-ink-soft); }

.calc__flat {
  background: color-mix(in oklab, var(--sc-canvas) 45%, transparent);
  border-left: 2px solid var(--sc-accent);
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  color: var(--sc-ink);
  border-radius: 2px;
  margin: 0 0 clamp(1.5rem, 3vw, 2rem);
}
.calc__flat b { color: var(--sc-accent); font-family: var(--sc-font-display); }

.calc__verdict { font-size: 1rem; color: var(--sc-ink-soft); margin: 0 0 clamp(1.5rem, 3vw, 2rem); }
.calc__verdict b { color: var(--sc-ink); }

.calc__cta { display: grid; gap: 0.6rem; }
.calc__btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--sc-accent);
  color: var(--sc-accent-ink);
  font-family: var(--sc-font-text);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.9em 1.5em;
  border-radius: 2px;
  text-decoration: none;
  width: fit-content;
  box-shadow: 0 8px 24px -8px color-mix(in oklab, var(--sc-accent) 60%, transparent);
  transition: transform 140ms var(--sc-ease-out), box-shadow 140ms var(--sc-ease-out);
}
.calc__btn:hover { transform: translateY(-1px); box-shadow: 0 12px 28px -8px color-mix(in oklab, var(--sc-accent) 70%, transparent); }
.calc__btn:focus-visible { outline: 2px solid var(--sc-accent); outline-offset: 3px; }
.calc__fine { font-size: 0.75rem; color: var(--sc-ink-soft); margin: 0; }

/* ---- responsive: stacked, result first ---------------------------------- */

@media (max-width: 860px) {
  .calc { grid-template-columns: 1fr; }
  .calc__panel--results { position: static; order: -1; }
}

@media (prefers-reduced-motion: reduce) {
  .calc__bar, .calc__hero, .calc__btn, .calc__currency-btn, .calc__number { transition: none; }
}