.kv-calculator {
  --kv-ink: #171717;
  --kv-muted: #68645f;
  --kv-paper: #f6f3ed;
  --kv-accent: #75502d;
  --kv-accent-hover: #5f3f24;
  --kv-line: #ded8ce;
  --kv-error: #8d2828;
  --kv-error-bg: #fff2f1;
  --kv-success: #2e6542;
  color: var(--kv-ink);
  font-size: 16px;
  line-height: 1.55;
  margin: 24px 0;
  max-width: 100%;
}

.kv-calculator *,
.kv-calculator *::before,
.kv-calculator *::after { box-sizing: border-box; }

.kv-calculator h2,
.kv-calculator h3,
.kv-calculator h4 { color: var(--kv-ink); line-height: 1.2; }
.kv-calculator h2 { font-size: clamp(26px, 4vw, 42px); margin: 6px 0 14px; }
.kv-calculator h3 { font-size: clamp(22px, 3vw, 30px); margin: 0 0 10px; }
.kv-calculator h4 { font-size: 20px; margin: 0 0 12px; }

.kv-calculator__intro,
.kv-calculator__form,
.kv-calculator__result-header,
.kv-result,
.kv-calculator__cta {
  border: 1px solid var(--kv-line);
  border-radius: 16px;
  margin-bottom: 22px;
  padding: clamp(20px, 4vw, 34px);
}

.kv-calculator__intro {
  background: linear-gradient(135deg, #fbfaf7, var(--kv-paper));
  border-top: 4px solid var(--kv-accent);
}

.kv-calculator__eyebrow {
  color: var(--kv-accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  margin: 0 0 4px;
  text-transform: uppercase;
}

.kv-calculator__source,
.kv-calculator__help,
.kv-field__help { color: var(--kv-muted); font-size: 14px; }

.kv-calculator__step { align-items: center; display: flex; gap: 12px; margin-bottom: 6px; }
.kv-calculator__step > span,
.kv-result__type {
  background: var(--kv-paper);
  border-radius: 999px;
  color: var(--kv-accent);
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  padding: 5px 10px;
}
.kv-calculator__step h3 { margin: 0; }

.kv-calculator__rows { display: grid; gap: 14px; margin: 22px 0; }
.kv-calculator__row { border: 1px solid var(--kv-line); border-radius: 12px; margin: 0; padding: 16px; }
.kv-calculator__row legend { font-weight: 800; padding: 0 6px; }
.kv-calculator__row-grid { align-items: end; display: grid; gap: 14px; grid-template-columns: minmax(180px, 1.2fr) minmax(160px, .8fr) auto; }

.kv-field { display: grid; font-weight: 700; gap: 6px; }
.kv-field input {
  background: #fff;
  border: 1px solid #aaa39a;
  border-radius: 8px;
  color: var(--kv-ink);
  font: inherit;
  min-height: 46px;
  padding: 9px 12px;
  width: 100%;
}
.kv-field input:focus { border-color: var(--kv-accent); box-shadow: 0 0 0 3px rgba(117, 80, 45, .16); outline: none; }
.kv-field input.is-invalid { border-color: var(--kv-error); }
.kv-field__help { font-weight: 400; }
.kv-field__with-unit { align-items: center; display: grid; gap: 8px; grid-template-columns: 1fr auto; }
.kv-field__with-unit > span { color: var(--kv-muted); }

.kv-calculator__form-actions { align-items: center; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.kv-button {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 800;
  justify-content: center;
  min-height: 44px;
  padding: 10px 17px;
  text-decoration: none !important;
}
.kv-button--primary { background: var(--kv-accent); color: #fff !important; }
.kv-button--primary:hover { background: var(--kv-accent-hover); }
.kv-button--secondary { background: #fff; border-color: var(--kv-accent); color: var(--kv-accent) !important; }
.kv-button--text { background: transparent; color: var(--kv-error); padding-inline: 8px; }
.kv-button:disabled { cursor: wait; opacity: .55; }

.kv-calculator__notice,
.kv-calculator__disclaimer,
.kv-calculator__errors {
  border-left: 4px solid var(--kv-accent);
  border-radius: 8px;
  margin-top: 22px;
  padding: 14px 16px;
}
.kv-calculator__notice { background: var(--kv-paper); }
.kv-calculator__notice p:last-child,
.kv-calculator__disclaimer p:last-child { margin-bottom: 0; }
.kv-calculator__notice--warning { border-left-color: #986900; }
.kv-calculator__errors { background: var(--kv-error-bg); border-left-color: var(--kv-error); color: var(--kv-error); }
.kv-calculator__errors ul { margin: 0; padding-left: 20px; }
.kv-calculator__disclaimer { background: #f3f5f7; border-left-color: #697480; }

.kv-calculator__progress { align-items: center; display: flex; gap: 12px; margin-top: 20px; }
.kv-calculator__spinner { animation: kv-spin .8s linear infinite; border: 3px solid var(--kv-line); border-radius: 50%; border-top-color: var(--kv-accent); height: 24px; width: 24px; }
@keyframes kv-spin { to { transform: rotate(360deg); } }

.kv-calculator__result-header { background: var(--kv-paper); }
.kv-calculator__total { align-items: baseline; display: flex; flex-wrap: wrap; gap: 10px 20px; margin: 18px 0; }
.kv-calculator__total strong { font-size: clamp(25px, 4vw, 38px); }

.kv-result__title { align-items: start; display: grid; gap: 18px; grid-template-columns: 1fr auto; }
.kv-result__title p { color: var(--kv-muted); margin: 0 0 8px; }
.kv-confidence { border: 1px solid var(--kv-line); border-radius: 10px; display: grid; min-width: 130px; padding: 10px 13px; }
.kv-confidence span,
.kv-confidence small { color: var(--kv-muted); font-size: 12px; }
.kv-confidence strong { font-size: 18px; }
.kv-confidence--high { border-left: 4px solid var(--kv-success); }
.kv-confidence--medium { border-left: 4px solid #9a6a00; }
.kv-confidence--reduced,
.kv-confidence--low { border-left: 4px solid var(--kv-error); }

.kv-result__metrics { display: grid; gap: 1px; grid-template-columns: 1.25fr 1fr .5fr; margin: 24px 0; }
.kv-metric { background: var(--kv-paper); display: grid; gap: 6px; padding: 17px; }
.kv-metric:first-child { border-radius: 10px 0 0 10px; }
.kv-metric:last-child { border-radius: 0 10px 10px 0; }
.kv-metric span { color: var(--kv-muted); font-size: 13px; }
.kv-metric strong { font-size: 18px; line-height: 1.3; }
.kv-metric--primary strong { font-size: clamp(23px, 3.5vw, 34px); }

.kv-result__section { border-top: 1px solid var(--kv-line); padding-top: 22px; margin-top: 24px; }
.kv-result__facts { display: grid; gap: 10px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.kv-fact { border: 1px solid var(--kv-line); border-radius: 8px; display: grid; gap: 5px; padding: 12px; }
.kv-fact span { color: var(--kv-muted); font-size: 12px; }
.kv-fact strong { font-size: 15px; }
.kv-result__flags { display: grid; gap: 10px; }
.kv-result__flag { background: var(--kv-paper); border-radius: 8px; padding: 13px 15px; }
.kv-result__flag p { color: var(--kv-muted); margin: 4px 0 0; }

.kv-result__details { border-top: 1px solid var(--kv-line); margin-top: 24px; padding-top: 20px; }
.kv-result__details summary { color: var(--kv-accent); cursor: pointer; font-weight: 800; }
.kv-table-wrap { margin-top: 14px; overflow-x: auto; }
.kv-table { border-collapse: collapse; font-size: 14px; min-width: 650px; width: 100%; }
.kv-table th,
.kv-table td { border: 1px solid var(--kv-line); padding: 9px; text-align: left; }
.kv-table th { background: var(--kv-paper); }

.kv-calculator__cta { background: var(--kv-accent); color: #fff; }
.kv-calculator__cta h3,
.kv-calculator__cta .kv-calculator__eyebrow { color: #fff; }
.kv-calculator__cta .kv-button--primary { background: #fff; color: var(--kv-accent) !important; }
.kv-calculator__cta .kv-button--secondary { background: transparent; border-color: #fff; color: #fff !important; }

@media (max-width: 720px) {
  .kv-calculator__row-grid,
  .kv-result__title,
  .kv-result__metrics { grid-template-columns: 1fr; }
  .kv-result__facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kv-metric:first-child,
  .kv-metric:last-child { border-radius: 8px; }
  .kv-confidence { width: 100%; }
  .kv-calculator__form-actions .kv-button { width: 100%; }
}

@media (max-width: 430px) {
  .kv-result__facts { grid-template-columns: 1fr; }
  .kv-calculator__intro,
  .kv-calculator__form,
  .kv-calculator__result-header,
  .kv-result,
  .kv-calculator__cta { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .kv-calculator__spinner { animation-duration: 1.8s; }
  .kv-calculator { scroll-behavior: auto; }
}