:root {
  --ink: #17252d;
  --muted: #53656e;
  --paper: #fbfaf6;
  --white: #ffffff;
  --line: #dfe5e3;
  --teal: #0b6b64;
  --teal-dark: #074e49;
  --mint: #dcefeb;
  --orange: #c95e27;
  --orange-soft: #f8e7dc;
  --shadow: 0 14px 36px rgba(23, 37, 45, .10);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.62;
}
img { max-width: 100%; height: auto; }
a { color: var(--teal-dark); text-underline-offset: .18em; }
h1, h2, h3 { margin: 0 0 .7rem; line-height: 1.12; letter-spacing: -.025em; }
h1 { max-width: 18ch; font-size: clamp(2.35rem, 6vw, 4.8rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.7rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1.2rem; padding-left: 1.2rem; }
li + li { margin-top: .42rem; }
.shell { width: min(1120px, calc(100% - 2.25rem)); margin-inline: auto; }
.narrow { width: min(760px, calc(100% - 2.25rem)); margin-inline: auto; }
.section { padding: clamp(3.5rem, 7vw, 6.5rem) 0; }
.section-tight { padding: 2.2rem 0; }
.section-alt { background: var(--white); border-block: 1px solid var(--line); }
.eyebrow { color: var(--teal); font-weight: 800; letter-spacing: .1em; text-transform: uppercase; font-size: .78rem; }
.lede { max-width: 64ch; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.28rem); }
.muted { color: var(--muted); }
.skip-link { position: absolute; left: -999px; top: 0; padding: .8rem 1rem; background: var(--ink); color: white; z-index: 99; }
.skip-link:focus { left: .5rem; top: .5rem; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(223,229,227,.9); background: rgba(251,250,246,.94); backdrop-filter: blur(14px); }
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--ink); font-weight: 850; text-decoration: none; letter-spacing: -.02em; }
.brand img { border-radius: 10px; }
.site-nav { display: flex; align-items: center; gap: 1.25rem; }
.site-nav a { color: var(--ink); font-weight: 700; text-decoration: none; }
.site-nav a:hover { color: var(--teal); }
.site-nav .nav-cta { padding: .62rem .9rem; color: white; background: var(--teal); border-radius: 999px; }
.nav-toggle { display: none; border: 1px solid var(--line); background: var(--white); padding: .6rem .8rem; border-radius: 9px; font: inherit; font-weight: 750; }
.hero { padding: clamp(4rem, 9vw, 8rem) 0 clamp(3.5rem, 7vw, 6rem); }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.hero h1 span { color: var(--teal); }
.hero-actions, .button-row { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.5rem; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: .74rem 1.05rem; border: 1px solid transparent; border-radius: 10px; background: var(--teal); color: white; font: inherit; font-weight: 800; text-decoration: none; cursor: pointer; }
.button:hover { background: var(--teal-dark); }
.button-secondary { color: var(--ink); background: var(--white); border: 1px solid var(--line); }
.button-secondary:hover { background: var(--mint); }
.hero-visual { position: relative; padding: 1rem; border: 1px solid var(--line); border-radius: 24px; background: var(--white); box-shadow: var(--shadow); }
.hero-visual img { display: block; border-radius: 14px; }
.proof-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; border: 1px solid var(--line); background: var(--line); border-radius: var(--radius); overflow: hidden; }
.proof-strip div { padding: 1.25rem; background: var(--white); }
.proof-strip strong { display: block; margin-bottom: .2rem; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-top: 2rem; }
.card { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); overflow: hidden; box-shadow: 0 8px 24px rgba(23,37,45,.05); }
.card-image { aspect-ratio: 5 / 4; width: 100%; object-fit: cover; border-bottom: 1px solid var(--line); }
.card-body { display: flex; flex: 1; flex-direction: column; padding: 1.35rem; }
.card-body .button { margin-top: auto; align-self: flex-start; }
.tag { display: inline-flex; align-self: flex-start; margin-bottom: .75rem; padding: .27rem .58rem; border-radius: 999px; color: var(--teal-dark); background: var(--mint); font-size: .78rem; font-weight: 800; }
.price { font-size: 1.15rem; font-weight: 850; }
.comparison { width: 100%; border-collapse: collapse; background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.comparison th, .comparison td { padding: .9rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison th { background: var(--mint); }
.comparison tr:last-child td { border-bottom: 0; }
.mobile-hint { display: none; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 3rem; align-items: start; }
.article { font-size: 1.04rem; }
.article h2 { margin-top: 2.7rem; font-size: 1.75rem; }
.article h3 { margin-top: 1.8rem; }
.article-callout { margin: 1.5rem 0; padding: 1.2rem 1.35rem; border-left: 4px solid var(--orange); border-radius: 0 12px 12px 0; background: var(--orange-soft); }
.formula { margin: 1.25rem 0; padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: 12px; background: var(--white); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; overflow-x: auto; }
.sidebar { position: sticky; top: 96px; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.sidebar img { border-radius: 10px; }
.checklist { list-style: none; padding: 0; }
.checklist li { position: relative; padding-left: 1.7rem; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 900; }
.breadcrumbs { padding: 1rem 0; font-size: .88rem; color: var(--muted); }
.breadcrumbs a { color: inherit; }
.notice { padding: 1rem 1.2rem; border: 1px solid #ebcbb8; border-radius: 12px; background: #fff8f3; }
.product-free-notice { margin: 1.5rem 0 0; }
.sidebar-button { width: 100%; margin-bottom: 1.2rem; }
.sidebar hr { margin: .4rem 0 1.3rem; border: 0; border-top: 1px solid var(--line); }

.calculator-hero { padding-bottom: 3.5rem; }
.calculator-hero h1 { max-width: 20ch; }
.calculator-hero .notice { max-width: 900px; margin-top: 1.5rem; }
.calculator-shell { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(310px, .65fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.calculator-inputs, .calculator-results, .calculator-errors { border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: 0 8px 24px rgba(23,37,45,.05); }
.calculator-inputs { padding: clamp(1.2rem, 3vw, 2rem); }
.calculator-heading { display: flex; justify-content: space-between; gap: 1.5rem; align-items: end; }
.input-note { color: var(--muted); font-size: .92rem; }
.calculator-inputs fieldset { min-width: 0; margin: 1.4rem 0 0; padding: 0; border: 0; }
.calculator-inputs legend { width: 100%; margin-bottom: .8rem; padding-bottom: .45rem; border-bottom: 1px solid var(--line); font-weight: 850; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.field-grid-two { max-width: 650px; }
.field { display: grid; gap: .38rem; color: var(--ink); font-weight: 750; }
.field span { display: flex; justify-content: space-between; gap: .7rem; align-items: end; }
.field small { color: var(--muted); font-size: .72rem; font-weight: 650; text-align: right; }
.field input, .field select { width: 100%; min-height: 48px; padding: .65rem .75rem; border: 1px solid #bcc9c6; border-radius: 9px; color: var(--ink); background: var(--white); font: inherit; }
.field input:focus, .field select:focus { outline: 3px solid rgba(11,107,100,.2); border-color: var(--teal); }
.field-compact { width: 125px; flex: 0 0 auto; }
.field-compact span { font-size: .82rem; }
.calculator-actions { margin-bottom: 0; }
.calculator-results-wrap { position: sticky; top: 96px; }
.calculator-results { overflow: hidden; }
.calculator-results > .eyebrow { padding: 1.25rem 1.4rem 0; }
.primary-result { padding: .25rem 1.4rem 1.4rem; border-bottom: 1px solid var(--line); }
.primary-result span, .result-grid span { display: block; color: var(--muted); font-size: .84rem; font-weight: 700; }
.primary-result strong { display: block; margin-top: .18rem; color: var(--teal-dark); font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1; letter-spacing: -.04em; overflow-wrap: anywhere; }
.result-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.result-grid div { min-width: 0; padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); }
.result-grid div:nth-child(odd) { border-right: 1px solid var(--line); }
.result-grid strong { display: block; margin-top: .12rem; font-size: 1.13rem; overflow-wrap: anywhere; }
.result-note { margin: 0; padding: 1rem 1.2rem; color: var(--muted); background: var(--mint); font-size: .86rem; }
.calculator-errors { padding: 1.2rem 1.3rem; border-color: #c94f45; background: #fff5f3; box-shadow: none; }
.calculator-errors ul { margin: .6rem 0 0; }
.upgrade-cards .card-body { min-height: 310px; }
.site-footer { padding: 3.5rem 0 1.3rem; color: #dbe7e5; background: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.4fr .7fr 1.2fr; gap: 2rem; }
.footer-grid a { display: block; margin-bottom: .45rem; color: white; }
.brand-line, .footer-heading { color: white; font-weight: 850; }
.footer-bottom { margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,.16); font-size: .86rem; }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; inset: 72px 1rem auto; flex-direction: column; align-items: stretch; padding: 1rem; border: 1px solid var(--line); border-radius: 14px; background: var(--white); box-shadow: var(--shadow); }
  .site-nav.is-open { display: flex; }
  .hero-grid, .article-layout, .calculator-shell { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .sidebar { position: static; }
  .cards { grid-template-columns: 1fr; }
  .proof-strip, .footer-grid { grid-template-columns: 1fr; }
  .comparison { display: block; overflow-x: auto; }
  table.comparison { display: table; min-width: 720px; }
  .mobile-hint { display: block; color: var(--muted); font-size: .9rem; }
  .calculator-results-wrap { position: static; }
  .calculator-heading { align-items: start; }
}

@media (max-width: 560px) {
  .field-grid { grid-template-columns: 1fr; }
  .calculator-heading { display: grid; }
  .field-compact { width: 100%; }
  .result-grid { grid-template-columns: 1fr; }
  .result-grid div:nth-child(odd) { border-right: 0; }
  .primary-result strong { font-size: 2.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}