:root {
  color-scheme: light;
  --ink: #101828;
  --muted: #5f6b7a;
  --paper: #ffffff;
  --soft: #f3f6fb;
  --line: #dbe4ef;
  --blue: #1646a0;
  --cyan: #22b8cf;
  --lime: #b8ef4f;
  --navy: #0b1730;
  --shadow: 0 24px 80px rgba(16, 24, 40, 0.16);
  font-family: Inter, Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--soft); color: var(--ink); }
a { color: inherit; text-decoration: none; }

.site-header {
  align-items: center;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 22px;
  justify-content: space-between;
  min-height: 76px;
  padding: 14px clamp(18px, 5vw, 72px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { align-items: baseline; display: flex; gap: 8px; min-width: 150px; }
.brand span { color: var(--blue); font-size: 26px; font-weight: 950; }
.brand strong { color: var(--cyan); font-size: 18px; font-weight: 950; letter-spacing: .16em; }
nav { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; }
nav a, .eyebrow { font-size: 12px; font-weight: 950; letter-spacing: .12em; text-transform: uppercase; }
nav a { color: var(--muted); }
.header-action { background: var(--navy); color: white; font-weight: 950; padding: 13px 18px; }

.hero {
  align-items: center;
  background:
    linear-gradient(135deg, rgba(11, 23, 48, .97), rgba(22, 70, 160, .92)),
    radial-gradient(circle at 78% 22%, rgba(34,184,207,.45), transparent 31%);
  color: white;
  display: grid;
  gap: 42px;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .78fr);
  min-height: calc(100vh - 76px);
  padding: clamp(52px, 7vw, 92px) clamp(18px, 5vw, 72px);
}

.hero-copy { max-width: 780px; }
.eyebrow { color: var(--blue); margin: 0 0 12px; }
.hero .eyebrow { color: var(--lime); }
h1,h2,h3,p { margin: 0; }
h1 { font-size: clamp(44px, 6vw, 82px); letter-spacing: 0; line-height: .96; }
h2 { font-size: clamp(30px, 4vw, 54px); letter-spacing: 0; line-height: 1.05; }
h3 { font-size: 22px; }
p { color: var(--muted); font-size: 17px; line-height: 1.68; }
.hero p { color: rgba(255,255,255,.82); margin-top: 20px; max-width: 720px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { align-items: center; border: 1px solid transparent; cursor: pointer; display: inline-flex; font: inherit; font-weight: 950; justify-content: center; min-height: 52px; padding: 0 22px; }
.button.primary { background: var(--lime); color: var(--navy); }
.button.secondary { background: white; color: var(--navy); }
.button.light { border-color: rgba(255,255,255,.36); color: white; }
.button.wide { width: 100%; }

.diagnostic-panel { background: rgba(255,255,255,.97); box-shadow: var(--shadow); color: var(--ink); overflow: hidden; padding: 22px; }
.panel-top { display: flex; gap: 8px; margin-bottom: 20px; }
.panel-top span { background: #d8e2ef; border-radius: 50%; display: block; height: 11px; width: 11px; }
.scan-card { background: var(--navy); color: white; display: grid; gap: 10px; padding: 22px; }
.scan-card span { color: rgba(255,255,255,.72); font-weight: 800; }
.meter { background: rgba(255,255,255,.15); height: 10px; overflow: hidden; }
.meter i { background: var(--lime); display: block; height: 100%; width: 72%; }
.module-grid { display: grid; gap: 10px; grid-template-columns: repeat(3, 1fr); margin-top: 16px; }
.module-grid div { background: var(--soft); border: 1px solid var(--line); color: var(--blue); font-weight: 950; padding: 16px; text-align: center; }
.support-line { border: 1px solid var(--line); display: grid; gap: 4px; margin-top: 16px; padding: 16px; }
.support-line small { color: var(--muted); font-weight: 800; }

.signal-strip { background: var(--lime); color: var(--navy); display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: center; padding: 16px clamp(18px,5vw,72px); }
.signal-strip span { font-size: 13px; font-weight: 950; text-transform: uppercase; }

.section, .workflow, .payment-section, .contact { padding: clamp(46px, 7vw, 82px) clamp(18px, 5vw, 72px); }
.section-head { display: grid; gap: 10px; max-width: 820px; }
.solution-grid { display: grid; gap: 16px; grid-template-columns: repeat(4, minmax(0,1fr)); margin-top: 34px; }
.solution-grid article { background: white; border: 1px solid var(--line); display: grid; gap: 14px; min-height: 260px; padding: 24px; }
.solution-grid article span { color: var(--cyan); font-size: 13px; font-weight: 950; }

.workflow { align-items: start; background: white; display: grid; gap: 36px; grid-template-columns: minmax(0,.9fr) minmax(320px,1fr); }
.workflow ol { counter-reset: step; display: grid; gap: 12px; list-style: none; margin: 0; padding: 0; }
.workflow li { background: var(--soft); border: 1px solid var(--line); display: grid; gap: 6px; padding: 20px; }
.workflow li span { color: var(--muted); }

.payment-section { align-items: start; display: grid; gap: 42px; grid-template-columns: minmax(0,.86fr) minmax(430px,1fr); }
.payment-intro { display: grid; gap: 16px; position: sticky; top: 102px; }
.payment-notes { display: grid; gap: 12px; grid-template-columns: repeat(2,1fr); margin-top: 8px; }
.payment-notes div { background: white; border: 1px solid var(--line); display: grid; gap: 4px; padding: 18px; }
.payment-notes span { color: var(--muted); font-size: 14px; }

.checkout-panel { background: white; border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; gap: 18px; padding: clamp(22px,4vw,34px); }
.warning { background: #eff8ff; border: 1px solid #b9e6fe; color: #175cd3; font-weight: 900; padding: 14px; }
.checkout-label, .field-help { color: var(--muted); font-size: 14px; font-weight: 800; }
.checkout-head { border-bottom: 1px solid var(--line); display: grid; gap: 8px; padding-bottom: 16px; }
.amount-label, .card-fields label { color: var(--ink); font-size: 14px; font-weight: 950; }
.amount-input { border: 1px solid #b8c6d9; display: grid; grid-template-columns: 50px 1fr; min-height: 54px; }
.amount-input span { border-right: 1px solid var(--line); color: var(--blue); display: grid; font-size: 22px; font-weight: 950; place-items: center; }
input, .paypal-field { background: white; border: 1px solid #b8c6d9; color: var(--ink); font: inherit; min-height: 48px; padding: 12px 14px; width: 100%; }
.amount-input input { border: 0; min-height: 52px; }
.card-fields { display: grid; gap: 8px; }
.field-row { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
.field-row > div { display: grid; gap: 8px; }
.divider { align-items: center; color: var(--muted); display: grid; font-weight: 900; grid-template-columns: 1fr auto 1fr; gap: 12px; }
.divider:before, .divider:after { background: var(--line); content: ""; height: 1px; }
.result-message { font-weight: 900; min-height: 24px; }
.result-message.success { color: #067647; }
.result-message.error { color: #b42318; }

.contact { align-items: center; background: var(--navy); color: white; display: flex; gap: 24px; justify-content: space-between; }
.contact .eyebrow { color: var(--lime); }
.contact p { color: rgba(255,255,255,.78); margin-top: 10px; }

@media (max-width: 960px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  nav { justify-content: flex-start; }
  .hero, .workflow, .payment-section { grid-template-columns: 1fr; }
  .payment-intro { position: static; }
  .solution-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 620px) {
  .hero { min-height: auto; }
  .diagnostic-panel { margin-inline: -6px; }
  .module-grid, .solution-grid, .payment-notes, .field-row { grid-template-columns: 1fr; }
  .contact { align-items: flex-start; flex-direction: column; }
}