:root {
  color-scheme: light;
  --ink: #17272c;
  --graphite: #26353a;
  --deep: #153f4a;
  --blue: #266e7f;
  --teal: #3a817b;
  --green: #3f7d57;
  --amber: #f0a23b;
  --mist: #e2eee9;
  --paper: #f7faf9;
  --white: #ffffff;
  --line: #c9d8d5;
  --muted: #607278;
  --shadow: 0 18px 45px rgba(21, 63, 74, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-size: 16px; line-height: 1.55; }
a { color: var(--blue); }
a:hover { color: var(--deep); }
button, input, select { font: inherit; }
button, .button { min-height: 44px; }

.site-header {
  position: sticky; top: 0; z-index: 30; color: var(--white); background: rgba(21, 63, 74, 0.97);
  border-bottom: 3px solid var(--amber); backdrop-filter: blur(12px);
}
.header-inner, .page-shell, .footer-inner { width: min(1180px, calc(100% - 32px)); margin-inline: auto; }
.header-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--white); text-decoration: none; font-weight: 850; letter-spacing: -0.02em; font-size: 1.12rem; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border: 2px solid var(--amber); border-radius: 8px 2px 8px 2px; color: var(--amber); font-size: 0.82rem; letter-spacing: -0.06em; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: #e9f2ef; text-decoration: none; font-weight: 650; font-size: 0.92rem; }
.nav a:hover { color: var(--amber); }
.menu-button { display: none; border: 1px solid rgba(255,255,255,.35); background: transparent; color: white; border-radius: 8px; padding: 8px 12px; }

.blueprint {
  background-color: var(--deep);
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 24px 24px;
}
.hero { color: white; padding: 54px 0 48px; border-bottom: 1px solid #0c333c; }
.hero-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 48px; align-items: end; }
.eyebrow { margin: 0 0 10px; color: var(--amber); text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 850; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.035em; }
h1 { margin: 0; font-size: clamp(2.35rem, 6vw, 5.4rem); max-width: 900px; }
.hero p { max-width: 720px; margin: 18px 0 0; color: #dbeae6; font-size: 1.08rem; }
.hero-note { border-left: 4px solid var(--amber); padding: 8px 0 8px 18px; color: #dbeae6; }
.hero-note strong { display: block; color: white; font-size: 1.2rem; }

.page-shell { padding-block: 44px 72px; }
.search-row { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 24px; }
.search-row h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.7rem); }
.search-box { width: min(390px, 100%); }
.search-box label { display: block; margin-bottom: 7px; font-weight: 750; }
.search-box input { width: 100%; border: 1px solid var(--line); border-radius: 9px; background: white; padding: 12px 14px; color: var(--ink); }
.search-box input:focus, input:focus, select:focus, button:focus-visible, a:focus-visible { outline: 3px solid rgba(240,162,59,.55); outline-offset: 2px; }

.tool-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.tool-card { position: relative; min-height: 220px; display: flex; flex-direction: column; color: var(--ink); text-decoration: none; background: white; border: 1px solid var(--line); border-radius: 14px 4px 14px 4px; padding: 23px; box-shadow: 0 7px 22px rgba(21,63,74,.05); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.tool-card:hover { transform: translateY(-3px); border-color: var(--teal); box-shadow: var(--shadow); color: var(--ink); }
.tool-index { color: var(--blue); font-size: .76rem; font-weight: 850; letter-spacing: .13em; }
.tool-card h3 { margin: 22px 0 8px; font-size: 1.35rem; }
.tool-card p { margin: 0 0 18px; color: var(--muted); }
.tool-link { margin-top: auto; color: var(--green); font-weight: 800; }
.search-empty { grid-column: 1 / -1; padding: 30px; background: white; border: 1px dashed var(--line); text-align: center; }

.section-band { background: var(--mist); border-block: 1px solid var(--line); }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; padding-block: 45px; }
.value-grid h3 { margin: 0 0 8px; }
.value-grid p { margin: 0; color: var(--muted); }

.calculator-page { background: linear-gradient(180deg, var(--deep) 0 390px, var(--paper) 390px); }
.calculator-head { color: white; padding: 44px 0 26px; }
.breadcrumb { margin-bottom: 18px; color: #bdd6d1; font-size: .9rem; }
.breadcrumb a { color: #e6f3f0; }
.calculator-head h1 { font-size: clamp(2.2rem, 5vw, 4.2rem); }
.calculator-head .lede { max-width: 760px; color: #dcebe8; font-size: 1.08rem; }
.calculator-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(330px, .75fr); gap: 24px; align-items: start; }
.panel { background: white; border: 1px solid var(--line); border-radius: 16px 4px 16px 4px; box-shadow: var(--shadow); }
.form-panel { padding: 26px; }
.form-panel h2, .result-panel h2 { margin: 0 0 20px; font-size: 1.35rem; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field label { display: block; margin-bottom: 7px; font-weight: 750; font-size: .92rem; }
.field small { display: block; margin-top: 6px; color: var(--muted); font-size: .78rem; line-height: 1.35; }
.input-shell { display: flex; align-items: center; border: 1px solid #b8cac6; border-radius: 8px; overflow: hidden; background: white; }
.input-shell:focus-within { outline: 3px solid rgba(240,162,59,.42); border-color: var(--amber); }
.input-shell input { min-width: 0; width: 100%; border: 0; outline: 0; padding: 11px 10px; color: var(--ink); background: transparent; }
.prefix, .suffix { padding: 0 0 0 12px; color: var(--muted); font-weight: 700; }
.suffix { padding: 0 12px 0 0; }
select { width: 100%; border: 1px solid #b8cac6; border-radius: 8px; padding: 11px 10px; color: var(--ink); background: white; }
.calculate-button { width: 100%; margin-top: 22px; border: 0; border-radius: 9px 2px 9px 2px; padding: 12px 18px; color: #17272c; background: var(--amber); font-weight: 850; cursor: pointer; }
.calculate-button:hover { background: #f4b258; }
.error { min-height: 24px; margin: 8px 0 0; color: #a92b2b; font-weight: 650; }

.result-panel { position: sticky; top: 92px; overflow: hidden; }
.result-top { padding: 25px; color: white; background: var(--deep); }
.result-row { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid #e3ece9; }
.result-row span { color: var(--muted); }
.result-row strong { text-align: right; }
.result-row .negative { color: #b32323; }
.result-primary { display: block; margin-bottom: 8px; padding: 0 0 19px; border-bottom: 2px solid var(--amber); }
.result-primary span { display: block; color: #bed5d0; font-size: .88rem; }
.result-primary strong { display: block; margin-top: 4px; color: white; text-align: left; font-size: clamp(1.9rem, 4vw, 2.65rem); }
.result-body { padding: 12px 25px 23px; }
.result-actions { display: flex; gap: 10px; margin-top: 18px; }
.ghost-button { flex: 1; border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; color: var(--deep); background: white; font-weight: 750; cursor: pointer; }
.ghost-button:hover { border-color: var(--blue); background: var(--mist); }

.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 42px; margin-top: 54px; }
.content-grid h2 { margin-top: 0; font-size: 1.8rem; }
.content-grid h3 { margin-top: 28px; }
.content-grid p, .content-grid li { color: #40545a; }
.formula { padding: 20px; border-left: 4px solid var(--blue); background: var(--mist); font-weight: 700; }
.faq details { border-top: 1px solid var(--line); padding: 15px 0; }
.faq summary { cursor: pointer; font-weight: 800; }
.faq details p { margin-bottom: 0; }
.cta-card { padding: 24px; border-radius: 14px 4px 14px 4px; color: white; background: var(--deep); }
.cta-card h3 { margin: 0 0 10px; }
.cta-card p { color: #d9e9e5; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 11px 16px; border-radius: 8px 2px 8px 2px; color: var(--ink); background: var(--amber); text-decoration: none; font-weight: 850; }
.button:hover { color: var(--ink); background: #f4b258; }
.disclosure { margin-top: 16px; color: var(--muted); font-size: .8rem; }
.ad-slot:empty, .affiliate-slot:empty { display: none; }

.prose { max-width: 820px; margin: 0 auto; }
.prose h1 { color: var(--deep); font-size: clamp(2.2rem, 5vw, 4rem); }
.prose h2 { margin-top: 34px; }
.prose p, .prose li { color: #40545a; }

.site-footer { color: #cfdfdb; background: #102f37; }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 32px; padding-block: 38px; }
.footer-inner p { max-width: 650px; margin: 10px 0 0; color: #adc5c0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; align-content: start; }
.footer-links a { color: #e1eeeb; }
.fine-print { margin-top: 18px; font-size: .82rem; color: #8eaaa4; }

@media (max-width: 900px) {
  .hero-grid, .calculator-layout, .content-grid { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-panel { position: static; }
  .content-grid aside { order: -1; }
}

@media (max-width: 650px) {
  .header-inner, .page-shell, .footer-inner { width: min(100% - 22px, 1180px); }
  .menu-button { display: inline-block; }
  .nav { position: absolute; top: 68px; inset-inline: 0; display: none; gap: 0; padding: 10px 16px 16px; background: var(--deep); border-bottom: 3px solid var(--amber); }
  .nav.is-open { display: grid; }
  .nav a { padding: 11px; }
  .hero { padding-block: 38px; }
  .hero-grid { gap: 26px; }
  .search-row { align-items: stretch; flex-direction: column; }
  .search-box { width: 100%; }
  .tool-grid, .value-grid, .field-grid, .footer-inner { grid-template-columns: 1fr; }
  .tool-card { min-height: 190px; }
  .calculator-page { background: linear-gradient(180deg, var(--deep) 0 500px, var(--paper) 500px); }
  .form-panel { padding: 19px; }
  .result-actions { flex-direction: column; }
}

@media print {
  .site-header, .calculator-head, .form-panel, .content-grid, .site-footer, .result-actions { display: none !important; }
  .calculator-page { background: white; }
  .page-shell { padding: 0; }
  .calculator-layout { display: block; }
  .result-panel { box-shadow: none; border: 1px solid #999; }
}