:root {
  color-scheme: light;
  --ink: #17233d;
  --muted: #55627a;
  --surface: #ffffff;
  --surface-soft: #f4f7fb;
  --line: #cfd8e8;
  --brand: #1557d5;
  --brand-dark: #0a368f;
  --accent: #55e4b6;
  --error: #a1252a;
  --warning: #875700;
  --success: #17673d;
  --info: #255da8;
  --shadow: 0 18px 48px rgba(31, 50, 87, 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: linear-gradient(160deg, #eef5ff 0, #fff 35rem);
  line-height: 1.6;
}
a { color: var(--brand-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 3px;
}
.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  padding: .75rem 1rem;
  background: var(--ink);
  color: #fff;
}
.skip-link:focus { top: 1rem; }
.site-header, main, footer { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
}
.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); font-weight: 750; text-decoration: none; }
.brand__mark {
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: .7rem;
  background: var(--ink);
  color: var(--accent);
  letter-spacing: -.04em;
}
.header-link { font-weight: 700; }
.hero { padding: clamp(3rem, 9vw, 7rem) 0 3rem; max-width: 880px; }
.eyebrow { margin: 0 0 .5rem; color: var(--brand-dark); font-weight: 800; text-transform: uppercase; letter-spacing: .09em; font-size: .78rem; }
h1, h2, h3 { line-height: 1.15; margin-top: 0; }
h1 { margin-bottom: 1.2rem; font-size: clamp(2.55rem, 7vw, 5.5rem); letter-spacing: -.055em; }
h2 { font-size: clamp(1.7rem, 4vw, 2.65rem); letter-spacing: -.035em; }
h3 { font-size: 1.08rem; }
.hero__lead { color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.3rem); max-width: 730px; }
.boundary { margin-top: 2rem; padding: 1rem 1.2rem; border-left: 5px solid var(--accent); background: rgba(255, 255, 255, .8); border-radius: 0 .75rem .75rem 0; }
.diagnostic, .offers, .privacy, .explanation {
  margin: 2rem 0;
  padding: clamp(1.25rem, 4vw, 3rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
}
.section-heading { max-width: 760px; }
label { display: block; margin: 1.5rem 0 .45rem; font-weight: 750; }
.input-row { display: grid; grid-template-columns: minmax(12rem, 1fr) auto auto; gap: .65rem; }
input, button, .contact-button { min-height: 3.2rem; border-radius: .7rem; font: inherit; }
input { min-width: 0; border: 2px solid #8594ae; padding: .65rem .85rem; font-size: 1.05rem; }
input[aria-invalid="true"] { border-color: var(--error); }
button, .contact-button {
  border: 2px solid var(--brand);
  padding: .65rem 1rem;
  background: var(--brand);
  color: #fff;
  font-weight: 750;
  cursor: pointer;
}
button:hover, .contact-button:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
button:disabled { opacity: .65; cursor: wait; }
.button-secondary { background: transparent; color: var(--brand-dark); }
.field-help, .field-error, .evidence-meta { margin: .5rem 0 0; color: var(--muted); font-size: .92rem; }
.field-error { min-height: 1.5rem; color: var(--error); font-weight: 700; }
.progress { padding: .75rem 0 0; color: var(--brand-dark); font-weight: 700; }
.results { margin-top: 1.5rem; border-top: 1px solid var(--line); padding-top: 1.5rem; }
.summary { padding: 1rem 1.15rem; border-radius: .75rem; background: var(--surface-soft); font-size: 1.3rem; }
.summary--error { border-left: 5px solid var(--error); }
.summary--warning { border-left: 5px solid var(--warning); }
.summary--pass { border-left: 5px solid var(--success); }
.summary--info { border-left: 5px solid var(--info); }
.checks { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.check { padding: 1rem; border: 1px solid var(--line); border-left-width: 5px; border-radius: .75rem; }
.check--error { border-left-color: var(--error); }
.check--warning { border-left-color: var(--warning); }
.check--pass { border-left-color: var(--success); }
.check--info { border-left-color: var(--info); }
.check__title { margin-bottom: .35rem; }
.check__detail { margin: 0; color: var(--muted); }
.raw-evidence { margin-top: 1.25rem; padding: 1rem; background: var(--surface-soft); border-radius: .75rem; }
.raw-evidence summary { font-weight: 800; cursor: pointer; }
.evidence-row { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); overflow-wrap: anywhere; }
.evidence-row__title { margin-bottom: .35rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92rem; }
.evidence-row__list, .evidence-row__empty { margin: 0; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .82rem; }
.explanation__grid, .offer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.explanation article, .offer-card { padding: 1.2rem; background: var(--surface-soft); border-radius: .85rem; }
.explanation p, .offer-card p { color: var(--muted); }
.offer-card { border: 1px solid var(--line); }
.offer-card--primary { border: 2px solid var(--brand); }
.offer-card__price { margin: 0 0 .25rem; color: var(--brand-dark) !important; font-weight: 850; font-size: 1.8rem; }
.offer-card__time { font-size: .92rem; }
.contact-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1rem; margin-top: 1.25rem; padding: 1.2rem; border: 1px solid var(--line); border-radius: .85rem; }
.contact-panel h3, .contact-panel p { margin-bottom: .3rem; }
.contact-button { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; text-align: center; }
.privacy li + li { margin-top: .7rem; }
footer { display: flex; justify-content: space-between; gap: 1rem; padding: 2rem 0 3rem; color: var(--muted); }

@media (max-width: 720px) {
  .site-header { align-items: flex-start; }
  .input-row, .checks, .explanation__grid, .offer-grid, .contact-panel { grid-template-columns: 1fr; }
  .input-row button { width: 100%; }
  footer { flex-direction: column; }
}

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