.calc-hero { padding: var(--space-10) 0 var(--space-8); text-align: center; position: relative; overflow: hidden; }
.calc-hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(ellipse 700px 320px at 50% -20%, color-mix(in srgb, var(--brand) 10%, transparent), transparent 70%);
}
.calc-hero__eyebrow {
  display: inline-block; padding: 5px 14px; border-radius: var(--radius-full);
  background: var(--accent-soft); color: var(--brand);
  font-size: var(--fs-xs); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}
.calc-hero h1 { margin-bottom: var(--space-3); font-size: clamp(28px, 4.5vw, 48px); }
.calc-hero p { max-width: 620px; margin: 0 auto; font-size: var(--fs-md); color: var(--text-muted); }

.calc-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-6);
  align-items: start;
}

.calc-inputs { position: sticky; top: 84px; }

@media (max-width: 1024px) {
  .calc-layout { grid-template-columns: 1fr; }
  .calc-inputs { position: static; }
  .chart-wrap { height: 240px; }
}
.calc-inputs .stack > * + * { margin-top: var(--space-5); }

.calc-results__big {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: var(--space-5);
}
.calc-results__label {
  font-size: 13px; color: var(--text-muted); font-weight: 500;
}
.calc-results__amount {
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  line-height: 1;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.calc-insight {
  font-size: var(--fs-sm); color: var(--text-muted); line-height: 1.5;
  padding: 12px 16px; margin-top: var(--space-4);
  background: var(--bg-muted); border-radius: var(--radius-sm);
  border-left: 3px solid var(--brand);
}
.calc-insight:empty { display: none; }

.chart-wrap { position: relative; height: 280px; margin-top: var(--space-4); }
.chart-wrap-tall { height: 340px; }
@media (max-width: 720px) {
  .chart-wrap-tall { height: 260px; }
}

.action-bar {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  margin-top: var(--space-5); padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}
@media (max-width: 720px) {
  .action-bar .btn { font-size: 12px; padding: 8px 12px; }
  .action-bar .btn svg { width: 14px; height: 14px; }
}

/* Scroll anchor for mobile */
.calc-results { scroll-margin-top: 80px; }

/* SEO content section */
.seo-content {
  margin-top: var(--space-16);
  padding: var(--space-10) 0 0;
}
.seo-content .seo-container {
  max-width: 800px;
}
.seo-content .seo-container > * + * { margin-top: var(--space-3); }

/* Section cards */
.seo-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-6);
  margin-top: var(--space-5);
}
.seo-section:first-child { margin-top: 0; }
.seo-section h2 {
  font-size: clamp(18px, 2.5vw, 22px);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
  color: var(--text);
}
.seo-section p {
  color: var(--text-muted); line-height: var(--lh-loose);
  font-size: var(--fs-sm); margin: 0;
}
.seo-section p + p { margin-top: var(--space-2); }
.seo-section p strong { color: var(--text); }

/* Formula highlight box */
.formula-box {
  background: var(--bg-muted);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-3);
  border-left: 3px solid var(--brand);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text);
  line-height: 1.6;
  overflow-x: auto;
}
.formula-box strong { color: var(--brand); }
.formula-label {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  display: block;
  margin-bottom: var(--space-1);
}

/* Example callout */
.seo-example {
  display: flex; gap: var(--space-4); align-items: flex-start;
  background: color-mix(in srgb, var(--brand) 4%, var(--bg-card));
  border: 1px solid color-mix(in srgb, var(--brand) 12%, var(--border));
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-3);
}
.seo-example__icon {
  flex-shrink: 0; width: 36px; height: 36px;
  display: grid; place-items: center;
  background: var(--brand); color: white;
  border-radius: var(--radius-sm);
  font-size: 16px; font-weight: 700;
}
.seo-example p { margin: 0; }

@media (max-width: 720px) {
  .seo-section { padding: var(--space-4) var(--space-4); }
}

/* FAQ */
.faq-section { margin-top: var(--space-5); }
.faq-section h2 {
  font-size: clamp(18px, 2.5vw, 22px);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
  color: var(--text);
}
.faq details {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5); margin-bottom: var(--space-3);
  transition: border-color var(--transition-fast);
}
.faq details[open] { border-color: var(--brand); }
.faq summary {
  font-weight: 600; cursor: pointer; list-style: none; color: var(--text);
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; flex-shrink: 0;
  font-size: 22px; line-height: 1; color: var(--text-subtle);
  transition: transform var(--transition);
}
.faq details[open] summary::after { content: "\2212"; }
.faq details > *:not(summary) { margin-top: var(--space-3); }
.faq details p { color: var(--text-muted); line-height: var(--lh-loose); font-size: var(--fs-sm); margin: 0; }

/* Related calculators carousel */
.related-section {
  margin-top: var(--space-8);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
}
.related-section h2 {
  font-size: clamp(18px, 2.5vw, 22px);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-2);
  color: var(--text);
}
.related-section__sub {
  font-size: var(--fs-sm); color: var(--text-subtle); margin: 0 0 var(--space-5);
}
.related-track-wrap {
  position: relative;
}
.related-track-wrap::before,
.related-track-wrap::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 48px;
  z-index: 2; pointer-events: none;
}
.related-track-wrap::before {
  left: 0;
  background: linear-gradient(to right, var(--bg), transparent);
}
.related-track-wrap::after {
  right: 0;
  background: linear-gradient(to left, var(--bg), transparent);
}
.related-track {
  display: flex; gap: var(--space-4);
  overflow-x: auto; scrollbar-width: none;
  scroll-behavior: smooth;
  padding: 4px 0;
  -webkit-overflow-scrolling: touch;
}
.related-track::-webkit-scrollbar { display: none; }

/* Carousel nav row (below the track) */
.related-nav-row {
  display: flex; justify-content: center; align-items: center;
  gap: 10px; margin-top: 16px;
}
.related-nav {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer; font-size: 13px; font-weight: 500;
  transition: border-color .15s, color .15s, background .15s;
}
.related-nav:hover { border-color: var(--brand); color: var(--brand); background: var(--bg-muted); }
.related-nav svg { width: 14px; height: 14px; flex-shrink: 0; }
@media (max-width: 720px) { .related-nav-row { display: none; } }
.related-card {
  flex: 0 0 260px;
  display: flex; flex-direction: column; gap: 8px;
  padding: var(--space-5); border: 1px solid var(--border);
  border-radius: var(--radius-md); background: var(--bg-card);
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  color: var(--text); text-decoration: none;
}
.related-card:hover {
  border-color: var(--brand); transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  text-decoration: none;
}
.related-card__icon {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: var(--bg-muted); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); transition: all .15s;
}
.related-card__icon svg { width: 16px; height: 16px; }
.related-card:hover .related-card__icon {
  background: var(--brand); color: white; border-color: var(--brand);
}
.related-card__title { font-weight: 600; font-size: var(--fs-sm); }
.related-card__desc { font-size: var(--fs-xs); color: var(--text-muted); line-height: 1.4; }
.related-card__cta {
  font-size: var(--fs-xs); font-weight: 600; color: var(--brand);
  margin-top: auto; display: inline-flex; align-items: center; gap: 4px;
}
.related-card__cta svg { transition: transform .15s; }
.related-card:hover .related-card__cta svg { transform: translateX(3px); }

@media (max-width: 720px) {
  .related-card { flex: 0 0 220px; padding: var(--space-4); }
  .related-track-wrap::before,
  .related-track-wrap::after { width: 24px; }
}

/* Compare page styles */
.compare-hero { padding: var(--space-8) 0 var(--space-6); }
.compare-hero h1 { font-size: clamp(24px, 4vw, 36px); margin-bottom: var(--space-2); }
.compare-hero p { color: var(--text-muted); font-size: var(--fs-md); }

.compare-tabs {
  display: none; gap: 0; background: var(--bg-muted); padding: 4px;
  border-radius: var(--radius-full); margin-bottom: var(--space-5);
}
.compare-tab {
  flex: 1; padding: 10px 16px; border-radius: var(--radius-full); border: 0;
  background: transparent; font-weight: 600; font-size: var(--fs-sm);
  color: var(--text-muted); cursor: pointer; text-align: center;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.compare-tab[aria-selected="true"] {
  background: var(--bg-card); color: var(--text); box-shadow: var(--shadow-sm);
}

.compare-columns {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5);
  align-items: start;
}
.compare-column .card { height: 100%; }
.compare-column__label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--fs-sm); font-weight: 600; margin-bottom: var(--space-4);
}
.compare-column__badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%;
  font-size: 12px; font-weight: 700;
}
.compare-column__badge--a { background: var(--chart-1); color: white; }
.compare-column__badge--b { background: var(--chart-2); color: white; }

.compare-summary {
  margin-top: var(--space-5);
}
.compare-summary__grid {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 0;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
}
.compare-summary__col {
  padding: var(--space-5); text-align: center;
}
.compare-summary__col--a { background: color-mix(in srgb, var(--chart-1) 5%, var(--bg-card)); }
.compare-summary__col--b { background: color-mix(in srgb, var(--chart-2) 5%, var(--bg-card)); }
.compare-summary__vs {
  display: flex; align-items: center; justify-content: center;
  padding: 0 var(--space-3);
  font-size: var(--fs-xs); font-weight: 700; color: var(--text-subtle);
  text-transform: uppercase; letter-spacing: 0.1em;
}
.compare-summary__big {
  font-family: var(--font-mono); font-size: clamp(24px, 4vw, 36px);
  font-weight: 600; font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em; line-height: 1.2;
}
.compare-summary__label {
  font-size: 11px; color: var(--text-subtle); text-transform: uppercase;
  letter-spacing: 0.06em; font-weight: 600; margin-bottom: 6px;
}
.compare-kpi-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px; background: var(--border); border: 1px solid var(--border);
  border-radius: var(--radius-md); overflow: hidden; margin-top: var(--space-4);
}
.compare-kpi-row .kpi { background: var(--bg-card); text-align: center; }
.compare-diff-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 14px; border-radius: var(--radius-full);
  font-family: var(--font-mono); font-size: var(--fs-sm); font-weight: 600;
  margin-top: var(--space-3);
}
.compare-diff-badge--better { background: color-mix(in srgb, var(--success) 12%, transparent); color: var(--success); }
.compare-diff-badge--worse { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }

.compare-final-result {
  display: flex; justify-content: center; margin-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.compare-final-result .compare-diff-badge {
  font-size: var(--fs-md); padding: 12px 24px;
}

.compare-sticky-bar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
  background: var(--bg-card); border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08); padding: 12px var(--space-4);
}
.compare-sticky-bar__inner {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-3);
  align-items: center; max-width: var(--container-max); margin: 0 auto;
}
.compare-sticky-bar__val {
  font-family: var(--font-mono); font-size: 18px; font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.compare-sticky-bar__label {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-subtle); font-weight: 600;
}
.compare-sticky-bar__diff {
  text-align: center; font-family: var(--font-mono); font-size: 13px; font-weight: 600;
}

@media (max-width: 720px) {
  .compare-tabs { display: flex; }
  .compare-columns { grid-template-columns: 1fr; }
  .compare-column[data-scenario] { display: none; }
  .compare-column[data-scenario].is-active { display: block; }
  .compare-summary__grid { grid-template-columns: 1fr 1fr; }
  .compare-summary__vs { display: none; }
  .compare-sticky-bar { display: block; }
  .compare-summary__big { font-size: clamp(20px, 4vw, 28px); }
  .site-footer--compact { padding-bottom: 80px; }
}

/* Ensure both charts are visible on mobile for view and export */
@media (max-width: 720px) {
  .compare-charts .compare-column[data-scenario] {
    display: block !important;
  }
}