:root {
  --precision-bg: #101010;
  --precision-panel: #171717;
  --precision-panel-soft: #1d1d1d;
  --precision-border: rgba(212, 175, 55, 0.22);
  --precision-border-strong: rgba(212, 175, 55, 0.42);
  --precision-gold: #d4af37;
  --precision-gold-soft: rgba(212, 175, 55, 0.14);
  --precision-text: #f4f1ea;
  --precision-muted: #b8b3a7;
  --precision-subtle: #8f897d;
  --precision-error: #ffb4a8;
  --precision-radius: 22px;
  --precision-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --page-gutter: clamp(1.25rem, 4vw, 4rem);
  --content-max: 1180px;
}

body {
  background: var(--precision-bg);
  color: var(--precision-text);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.precision-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(212, 175, 55, 0.1), transparent 34rem),
    linear-gradient(180deg, #111 0%, #151515 48%, #101010 100%);
}

.precision-container {
  width: min(100% - (var(--page-gutter) * 2), var(--content-max));
  margin-inline: auto;
}

.precision-hero {
  padding: clamp(5.5rem, 9vw, 8rem) 0 clamp(2.5rem, 6vw, 4.75rem);
}

.precision-eyebrow,
.section-kicker {
  margin: 0 0 0.85rem;
  color: var(--precision-gold);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.precision-hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  line-height: 0.94;
  letter-spacing: -0.07em;
}

.precision-lede {
  max-width: 700px;
  margin: 1.4rem 0 0;
  color: var(--precision-muted);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.75;
}

.precision-notice {
  max-width: 850px;
  margin-top: 2rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--precision-border);
  border-radius: 16px;
  background: rgba(212, 175, 55, 0.075);
  color: var(--precision-muted);
  line-height: 1.65;
}

.precision-notice strong {
  color: var(--precision-text);
}

.precision-tool-section {
  padding: 0 0 clamp(3rem, 6vw, 5rem);
}

.precision-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 0.75fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}

.precision-card {
  border: 1px solid var(--precision-border);
  border-radius: var(--precision-radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent),
    var(--precision-panel);
  box-shadow: var(--precision-shadow);
}

.precision-form,
.precision-results {
  padding: clamp(1.25rem, 3vw, 2rem);
}

.card-heading {
  margin-bottom: 1.75rem;
}

.card-heading h2 {
  margin: 0;
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  letter-spacing: -0.04em;
}

.field-group {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.25rem;
}

.field-group label {
  color: var(--precision-text);
  font-size: 0.9rem;
  font-weight: 700;
}

.input-shell {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 58px;
  border: 1px solid rgba(212, 175, 55, 0.28);
  border-radius: 16px;
  background: #101010;
  overflow: hidden;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.input-shell:focus-within {
  border-color: var(--precision-border-strong);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.08);
}

.input-shell input {
  width: 100%;
  border: 0;
  outline: 0;
  padding: 1rem;
  background: transparent;
  color: var(--precision-text);
  font: inherit;
  font-size: 1.05rem;
  font-weight: 700;
}

.input-shell input::placeholder {
  color: rgba(244, 241, 234, 0.32);
}

.input-shell span {
  padding: 0 1rem;
  color: var(--precision-gold);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.field-note {
  margin: 0;
  color: var(--precision-subtle);
  font-size: 0.84rem;
  line-height: 1.55;
}

.toggle-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin: 1.5rem 0;
  padding: 1rem;
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: 16px;
  background: var(--precision-panel-soft);
}

.toggle-row strong,
.toggle-row span {
  display: block;
}

.toggle-row strong {
  font-size: 0.92rem;
}

.toggle-row span {
  margin-top: 0.25rem;
  color: var(--precision-subtle);
  font-size: 0.8rem;
}

.switch {
  position: relative;
  flex: 0 0 auto;
  width: 52px;
  height: 30px;
}

.switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.switch span {
  position: absolute;
  inset: 0;
  cursor: pointer;
  border: 1px solid var(--precision-border);
  border-radius: 999px;
  background: #0d0d0d;
}

.switch span::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 5px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--precision-subtle);
  transition: transform 180ms ease, background 180ms ease;
}

.switch input:checked + span::before {
  transform: translateX(21px);
  background: var(--precision-gold);
}

.form-error {
  min-height: 1.35rem;
  margin: 0 0 1rem;
  color: var(--precision-error);
  font-size: 0.88rem;
}

.precision-reset {
  width: 100%;
  min-height: 52px;
  border: 1px solid var(--precision-border);
  border-radius: 14px;
  background: transparent;
  color: var(--precision-gold);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.precision-reset:hover,
.precision-reset:focus-visible {
  border-color: var(--precision-gold);
  background: var(--precision-gold);
  color: #111;
}

.result-stack {
  display: grid;
  gap: 1rem;
}

.result-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.45rem;
  padding: 1.15rem;
  border: 1px solid rgba(212, 175, 55, 0.15);
  border-radius: 18px;
  background: #101010;
}

.result-row span {
  color: var(--precision-subtle);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.result-row strong {
  color: var(--precision-text);
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.result-row small {
  color: var(--precision-gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-emphasis {
  border-color: var(--precision-border-strong);
  background:
    linear-gradient(135deg, rgba(212, 175, 55, 0.13), transparent 70%),
    #101010;
}

.formula-panel {
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.035);
}

.formula-panel p {
  margin: 0 0 0.45rem;
  color: var(--precision-subtle);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.formula-panel code {
  color: var(--precision-text);
  font-family: "Inter", system-ui, sans-serif;
  font-size: 0.92rem;
  line-height: 1.55;
}

.precision-links {
  padding: 0 0 clamp(3rem, 6vw, 5rem);
}

.precision-links-card {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: var(--precision-radius);
  background:
    linear-gradient(135deg, rgba(212, 175, 55, 0.08), transparent 70%),
    var(--precision-panel);
}

.precision-links-card h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  letter-spacing: -0.04em;
}

.precision-links-card p {
  max-width: 850px;
  margin: 0;
  color: var(--precision-muted);
  line-height: 1.75;
}

.precision-links-card a {
  color: var(--precision-gold);
  text-decoration: none;
}

.precision-links-card a:hover,
.precision-links-card a:focus-visible {
  text-decoration: underline;
}

.precision-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.precision-link-row a {
  padding: 0.75rem 1rem;
  border: 1px solid var(--precision-border);
  border-radius: 999px;
  color: var(--precision-gold);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.precision-link-row a:hover,
.precision-link-row a:focus-visible {
  background: var(--precision-gold);
  color: #111;
  text-decoration: none;
}

.precision-education {
  padding: clamp(3rem, 6vw, 5.5rem) 0;
  border-top: 1px solid rgba(212, 175, 55, 0.12);
  background: #121212;
}

.education-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

.education-grid article,
.clinical-disclaimer {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid rgba(212, 175, 55, 0.16);
  border-radius: var(--precision-radius);
  background: var(--precision-panel);
}

.education-grid h2,
.clinical-disclaimer h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  letter-spacing: -0.04em;
}

.education-grid p,
.clinical-disclaimer p,
.education-grid li {
  color: var(--precision-muted);
  line-height: 1.75;
}

.education-grid p,
.clinical-disclaimer p {
  margin: 0 0 1rem;
}

.education-grid p:last-child,
.clinical-disclaimer p:last-child {
  margin-bottom: 0;
}

.education-grid ul {
  margin: 0;
  padding-left: 1.2rem;
}

.education-grid li + li {
  margin-top: 0.65rem;
}

.clinical-disclaimer {
  margin-top: clamp(1.25rem, 3vw, 2rem);
  background:
    linear-gradient(135deg, rgba(212, 175, 55, 0.08), transparent 70%),
    var(--precision-panel);
}

@media (max-width: 900px) {
  .precision-grid,
  .education-grid {
    grid-template-columns: 1fr;
  }

  .precision-results {
    position: static;
  }
}

@media (max-width: 560px) {
  .precision-hero {
    padding-top: 4.75rem;
  }

  .precision-form,
  .precision-results,
  .education-grid article,
  .clinical-disclaimer,
  .precision-links-card {
    padding: 1.1rem;
    border-radius: 18px;
  }

  .toggle-row {
    align-items: flex-start;
  }

  .result-row strong {
    font-size: 1.85rem;
  }

  .precision-link-row {
    flex-direction: column;
  }

  .precision-link-row a {
    width: 100%;
    text-align: center;
  }
}