:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-2: #edf4ff;
  --text: #14213d;
  --muted: #5f6f89;
  --line: #dce4ef;
  --brand: #1769e0;
  --brand-dark: #0f4eac;
  --success: #177b55;
  --shadow: 0 18px 45px rgba(20, 33, 61, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
code {
  padding: .12rem .35rem;
  border-radius: .35rem;
  background: #eef2f7;
  font-size: .92em;
}
.container { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }
.narrow { width: min(820px, 100%); }
.skip-link { position: absolute; left: -9999px; top: 0; }
.skip-link:focus {
  left: 20px; top: 20px; z-index: 999;
  background: var(--surface); padding: 10px 14px; border-radius: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 249, 252, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { text-decoration: none; font-weight: 650; color: #34445e; }
.nav a:hover { color: var(--brand); }
.nav-cta {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--brand);
  color: white !important;
}
.menu-button {
  display: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  padding: 10px 14px;
  font: inherit;
  font-weight: 700;
}

.hero { padding: 78px 0 64px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.eyebrow { margin: 0 0 12px; color: var(--brand); font-size: .78rem; font-weight: 850; letter-spacing: .12em; }
h1, h2, h3 { line-height: 1.13; margin-top: 0; }
h1 { font-size: clamp(2.4rem, 6vw, 4.7rem); letter-spacing: -.045em; margin-bottom: 22px; }
h2 { font-size: clamp(2rem, 4vw, 3.15rem); letter-spacing: -.035em; margin-bottom: 16px; }
h3 { font-size: 1.25rem; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 760px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 0;
  border-radius: 12px;
  padding: 0 18px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
}
.button.primary { background: var(--brand); color: white; }
.button.primary:hover { background: var(--brand-dark); }
.button.secondary { background: var(--surface); border: 1px solid var(--line); }
.check-list { display: flex; flex-wrap: wrap; gap: 12px 24px; padding: 0; margin: 0; list-style: none; color: var(--muted); }
.check-list li::before { content: "✓"; color: var(--success); font-weight: 900; margin-right: 8px; }

.hero-card {
  background: linear-gradient(145deg, #ffffff, #eaf2ff);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.hero-card img { border-radius: 16px; width: 100%; }
.status-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 18px; }
.status-grid div { background: rgba(255,255,255,.82); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.status-grid span { display: block; color: var(--muted); font-size: .8rem; }
.status-grid strong { font-size: 1rem; }

.metric-strip { border-block: 1px solid var(--line); background: var(--surface); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); }
.metrics div { padding: 24px; border-right: 1px solid var(--line); }
.metrics div:last-child { border-right: 0; }
.metrics strong { display: block; font-size: 1.8rem; }
.metrics span { color: var(--muted); }

.section { padding: 82px 0; }
.section.alt { background: var(--surface-2); }
.section-heading { max-width: 760px; margin-bottom: 36px; }
.section-heading p:last-child { color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card, .article-card, .test-panel, .contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.card { padding: 28px; }
.card p { color: var(--muted); margin-bottom: 0; }
.icon {
  width: 46px; height: 46px; display: grid; place-items: center;
  border-radius: 12px; background: var(--surface-2); color: var(--brand); font-weight: 900;
  margin-bottom: 22px;
}

.feature-grid { display: grid; grid-template-columns: 1fr .8fr; gap: 44px; align-items: center; }
.feature-list { display: grid; gap: 12px; margin-top: 26px; }
.feature-list div { display: flex; gap: 14px; align-items: flex-start; }
.feature-list strong { color: var(--brand); }
.test-panel { padding: 30px; }
.panel-label { color: var(--brand); font-weight: 800; font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; }
.test-result { color: var(--success); font-weight: 750; min-height: 1.6em; }

.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
.contact-form { padding: 28px; display: grid; gap: 18px; }
.contact-form label { display: grid; gap: 7px; font-weight: 700; }
.contact-form input, .contact-form textarea {
  width: 100%; border: 1px solid #cfd9e6; border-radius: 10px;
  padding: 12px 14px; font: inherit; color: var(--text); background: #fff;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: 3px solid rgba(23,105,224,.15); border-color: var(--brand);
}
.form-result { min-height: 1.5em; color: var(--success); font-weight: 700; margin: 0; }

.page-hero { padding: 80px 0 36px; }
.article-card { padding: 36px; }
.detail-list { display: grid; gap: 12px; padding-left: 20px; }
.callout { margin: 28px 0; padding: 18px; border-left: 4px solid var(--brand); background: var(--surface-2); border-radius: 8px; }
.callout p { margin-bottom: 0; color: var(--muted); }

.site-footer { border-top: 1px solid var(--line); background: #111b2d; color: #dbe5f5; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr auto; gap: 32px; align-items: start; padding: 38px 0; }
.footer-grid p { color: #aebbd0; margin: 5px 0 0; }
.footer-grid > div:nth-child(2) { display: grid; gap: 6px; }
.footer-grid a { color: #dbe5f5; }
.copyright { white-space: nowrap; }

@media (max-width: 860px) {
  .hero-grid, .feature-grid, .contact-grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metrics div:nth-child(2) { border-right: 0; }
  .menu-button { display: inline-flex; }
  .nav:not(.nav-static) {
    display: none; position: absolute; top: 76px; left: 20px; right: 20px;
    background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
    padding: 14px; box-shadow: var(--shadow); flex-direction: column; align-items: stretch;
  }
  .nav.is-open { display: flex; }
  .nav-static { gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
  .footer-grid { grid-template-columns: 1fr; }
  .copyright { white-space: normal; }
}

@media (max-width: 520px) {
  .container { width: min(100% - 28px, 1120px); }
  .hero { padding-top: 48px; }
  .status-grid { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr; }
  .metrics div { border-right: 0; border-bottom: 1px solid var(--line); }
  .metrics div:last-child { border-bottom: 0; }
  .nav-static { display: none; }
}