:root {
  --ink: #102a43;
  --ink-soft: #243b53;
  --slate: #627d98;
  --line: #d9e2ec;
  --surface: #ffffff;
  --canvas: #f7fafc;
  --teal: #087f8c;
  --teal-dark: #065c67;
  --teal-soft: #e6fffb;
  --amber: #b45309;
  --amber-soft: #fff7ed;
  --danger: #b42318;
  --danger-soft: #fff1f0;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(16, 42, 67, .08);
  --content: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--canvas); font: 16px/1.6 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
img, svg { max-width: 100%; }
a { color: var(--teal-dark); text-decoration-thickness: .08em; text-underline-offset: .16em; }
a:hover { color: var(--ink); }
button, input, select { font: inherit; }
button, select, input { min-height: 44px; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid #f59e0b; outline-offset: 3px; }
.skip-link { position: absolute; left: 1rem; top: -4rem; z-index: 20; padding: .65rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.97); }
.nav-shell, .container { width: min(calc(100% - 2rem), var(--content)); margin-inline: auto; }
.nav-shell { display: flex; align-items: center; min-height: 72px; gap: 1rem; }
.brand { display: inline-flex; gap: .62rem; align-items: center; color: var(--ink); font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 9px; color: white; background: var(--teal); box-shadow: inset 0 -5px 0 rgba(0,0,0,.12); font-size: .8rem; }
.site-nav { display: flex; align-items: center; gap: .3rem; margin-left: auto; }
.site-nav a { padding: .45rem .7rem; color: var(--ink-soft); text-decoration: none; font-size: .94rem; }
.site-nav a[aria-current="page"] { color: var(--teal-dark); font-weight: 750; }
.nav-toggle { display: none; margin-left: auto; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); background: white; padding: .4rem .65rem; }
.site-footer { margin-top: 4rem; border-top: 1px solid var(--line); background: var(--ink); color: #d9e2ec; }
.footer-grid { display: grid; grid-template-columns: 1.45fr 1fr 1fr; gap: 2rem; padding: 2.7rem 0 1.5rem; }
.site-footer h2 { margin: 0 0 .5rem; color: white; font-size: 1rem; }
.site-footer p, .site-footer li { margin: 0; font-size: .92rem; }
.site-footer ul { display: grid; gap: .25rem; padding: 0; margin: 0; list-style: none; }
.site-footer a { color: #d9e2ec; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 0 1.7rem; border-top: 1px solid rgba(255,255,255,.16); font-size: .82rem; }
.footer-slot { min-height: 2.5rem; border: 1px dashed rgba(255,255,255,.24); border-radius: 8px; margin-top: 1.25rem; padding: .45rem .65rem; color: #9fb3c8; font-size: .75rem; }
main { min-height: 58vh; }
.hero { padding: clamp(3.25rem, 8vw, 6.5rem) 0 3.2rem; background: radial-gradient(circle at 86% 18%, #d5f5f6 0, transparent 31%), linear-gradient(180deg, #fff 0%, #f7fafc 100%); }
.hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: clamp(1.5rem, 5vw, 5rem); align-items: center; }
.eyebrow { display: inline-flex; margin: 0 0 .8rem; color: var(--teal-dark); font-size: .78rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
h1, h2, h3 { color: var(--ink); line-height: 1.13; letter-spacing: -.03em; }
h1 { max-width: 19ch; margin: 0; font-size: clamp(2.35rem, 6vw, 4.5rem); }
h2 { margin: 0 0 .85rem; font-size: clamp(1.55rem, 3vw, 2.35rem); }
h3 { margin: 0 0 .35rem; font-size: 1.12rem; }
.hero p { max-width: 62ch; margin: 1.25rem 0; color: var(--ink-soft); font-size: 1.12rem; }
.hero-actions, .button-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 46px; padding: .65rem 1rem; border: 1px solid var(--teal); border-radius: 8px; color: white; background: var(--teal); font-weight: 750; text-decoration: none; }
.button:hover { color: white; background: var(--teal-dark); }
.button.secondary { color: var(--teal-dark); background: white; }
.button.ghost { color: var(--ink-soft); border-color: var(--line); background: transparent; }
.hero-note { margin-top: 1rem; color: var(--slate); font-size: .88rem; }
.signal-card, .card, .result-card, .info-panel, .form-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.signal-card { padding: 1.25rem; }
.signal-card h2 { font-size: 1rem; letter-spacing: 0; }
.signal-row { display: flex; align-items: center; gap: .7rem; padding: .7rem 0; border-top: 1px solid var(--line); }
.signal-row:first-of-type { border-top: 0; }
.signal-icon { display: grid; place-items: center; flex: 0 0 2.1rem; width: 2.1rem; height: 2.1rem; border-radius: 50%; color: var(--teal-dark); background: var(--teal-soft); font-weight: 800; }
.signal-row strong, .signal-row span { display: block; }
.signal-row span { color: var(--slate); font-size: .84rem; }
.section { padding: clamp(2.8rem, 6vw, 5rem) 0; }
.section.tint { background: #edf4f7; }
.section-heading { display: grid; grid-template-columns: minmax(0, 650px) auto; justify-content: space-between; gap: 1.5rem; align-items: end; margin-bottom: 1.7rem; }
.section-heading p { max-width: 60ch; margin: 0; color: var(--ink-soft); }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { padding: 1.2rem; }
.card p { margin: .45rem 0 0; color: var(--ink-soft); }
.card .text-link { display: inline-flex; margin-top: .75rem; font-weight: 750; }
.step-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .85rem; counter-reset: step; }
.step { position: relative; padding: 1rem 1rem 1rem 3.25rem; border-left: 1px solid var(--line); background: white; }
.step::before { content: counter(step); counter-increment: step; position: absolute; left: .9rem; top: .95rem; display: grid; place-items: center; width: 1.55rem; height: 1.55rem; border-radius: 50%; color: white; background: var(--teal); font-size: .78rem; font-weight: 800; }
.step strong, .step span { display: block; }
.step span { margin-top: .25rem; color: var(--slate); font-size: .9rem; }
.scenario-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: .75rem; }
.scenario { padding: 1rem; border-top: 3px solid var(--teal); background: white; }
.scenario strong { display: block; }
.scenario p { margin: .35rem 0 0; color: var(--slate); font-size: .88rem; }
.callout { padding: 1.2rem 1.25rem; border-left: 4px solid var(--amber); background: var(--amber-soft); }
.callout h2 { margin-bottom: .3rem; font-size: 1.1rem; }
.callout p { margin: 0; color: #78350f; }
.page-hero { padding: 3.4rem 0 2rem; background: white; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 24ch; font-size: clamp(2.2rem, 5vw, 3.5rem); }
.page-hero p { max-width: 66ch; margin-bottom: 0; color: var(--ink-soft); font-size: 1.08rem; }
.breadcrumb { margin-bottom: 1rem; color: var(--slate); font-size: .88rem; }
.breadcrumb a { color: var(--slate); }
.prose { max-width: 780px; }
.prose > * + * { margin-top: 1.05rem; }
.prose ul, .prose ol { padding-left: 1.2rem; }
.prose li + li { margin-top: .45rem; }
.tool-layout { display: grid; grid-template-columns: minmax(0, .93fr) minmax(360px, 1.07fr); gap: 1.25rem; align-items: start; }
.form-card { padding: clamp(1.1rem, 3vw, 1.7rem); }
.form-card h2, .results h2 { font-size: 1.35rem; }
.form-intro { margin-top: -.25rem; color: var(--slate); font-size: .92rem; }
.fieldsets { display: grid; gap: 1rem; }
fieldset { min-width: 0; margin: 0; padding: 1rem; border: 1px solid var(--line); border-radius: 10px; }
legend { padding: 0 .35rem; color: var(--ink); font-size: .93rem; font-weight: 800; }
.field-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .8rem; }
.field { min-width: 0; }
.field.full { grid-column: 1 / -1; }
label { display: block; margin-bottom: .3rem; color: var(--ink-soft); font-size: .88rem; font-weight: 700; }
.help { margin: .3rem 0 0; color: var(--slate); font-size: .76rem; }
.input-wrap { position: relative; }
.input-wrap span { position: absolute; top: 50%; right: .7rem; transform: translateY(-50%); color: var(--slate); font-size: .82rem; pointer-events: none; }
input, select { width: 100%; border: 1px solid #bcccdc; border-radius: 8px; color: var(--ink); background: white; padding: .58rem .7rem; }
.input-wrap input { padding-right: 3.65rem; }
input[aria-invalid="true"] { border-color: var(--danger); background: var(--danger-soft); }
.error { min-height: 1.15rem; margin: .2rem 0 0; color: var(--danger); font-size: .78rem; font-weight: 650; }
.form-actions { margin-top: 1rem; }
.results { display: grid; gap: 1rem; }
.results[hidden] { display: none; }
.result-card { padding: 1.15rem; }
.result-card.primary { border: 2px solid var(--teal); background: linear-gradient(135deg, #fff 0%, var(--teal-soft) 100%); }
.result-kicker { margin: 0 0 .25rem; color: var(--teal-dark); font-size: .77rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .7rem; margin-top: 1rem; }
.metric { padding: .72rem; border-radius: 9px; background: rgba(255,255,255,.75); }
.metric span { display: block; color: var(--slate); font-size: .75rem; }
.metric strong { display: block; margin-top: .12rem; font-size: 1.05rem; }
.config-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: .75rem; }
.configuration { padding: .9rem; border-radius: 9px; background: #f7fafc; }
.configuration ul, .checklist { display: grid; gap: .45rem; margin: .6rem 0 0; padding: 0; list-style: none; }
.configuration li, .checklist li { position: relative; padding-left: 1.45rem; }
.configuration li::before, .checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 900; }
.bay-diagram { display: flex; align-items: end; gap: .45rem; padding: 1rem; border-radius: 9px; background: var(--ink); }
.bay { display: grid; place-items: center; flex: 1; min-width: 0; height: 88px; padding: .25rem; border: 1px solid #486581; border-radius: 5px 5px 2px 2px; color: #d9e2ec; font-size: .7rem; font-weight: 800; text-align: center; }
.bay.parity { color: #fed7aa; border-color: #b45309; background: rgba(180,83,9,.25); }
.bay.spare { color: #9fb3c8; border-style: dashed; }
.status { display: flex; gap: .65rem; align-items: flex-start; padding: .8rem .9rem; border-radius: 9px; }
.status.warning { background: var(--amber-soft); color: #78350f; }
.status.limit { background: var(--danger-soft); color: #7f1d1d; }
.status svg { flex: 0 0 1.2rem; width: 1.2rem; margin-top: .15rem; }
.ad-slot { min-height: 74px; display: grid; place-items: center; border: 1px dashed #bcccdc; border-radius: 8px; color: var(--slate); font-size: .75rem; text-align: center; }
.planner-copy-status { min-height: 1.2rem; margin: .3rem 0 0; color: var(--teal-dark); font-size: .82rem; font-weight: 700; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: white; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { padding: .8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--ink); background: #f7fafc; font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; }
tr:last-child td { border-bottom: 0; }
.empty-contact { padding: 1rem; border: 1px dashed #9fb3c8; border-radius: 10px; background: white; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 900px) {
  .hero-grid, .tool-layout { grid-template-columns: 1fr; }
  .signal-card { max-width: 680px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .step-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.4fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 700px) {
  .nav-shell { min-height: 63px; flex-wrap: wrap; }
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; flex-basis: 100%; flex-direction: column; align-items: stretch; padding: .2rem 0 .75rem; margin-left: 0; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .65rem .2rem; border-top: 1px solid var(--line); }
  .section-heading { display: block; }
  .section-heading h2 { margin-bottom: .65rem; }
  .card-grid, .scenario-grid { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .config-grid, .field-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
}
@media (max-width: 420px) {
  .nav-shell, .container { width: min(calc(100% - 1.25rem), var(--content)); }
  h1 { font-size: 2.35rem; }
  .hero { padding-top: 3.1rem; }
  .metric-grid { grid-template-columns: 1fr; }
  .step-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > :first-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .button-row .button { width: 100%; }
}
@media print {
  body { background: white; font-size: 10pt; }
  .site-header, .site-footer, .hero, .page-hero, .form-card, .no-print, .ad-slot { display: none !important; }
  main, .section { padding: 0; }
  .container { width: 100%; }
  .tool-layout { display: block; }
  .results { display: block; }
  .result-card { box-shadow: none; break-inside: avoid; margin-bottom: .5rem; }
  .results[hidden] { display: none !important; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; } }