:root {
  color-scheme: light;
  --ink: #101d35;
  --navy: #071a36;
  --navy-soft: #102c55;
  --red: #ed1c2f;
  --red-dark: #c91526;
  --paper: #ffffff;
  --wash: #f3f5f8;
  --muted: #5d6879;
  --line: #d9dee7;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

section[id] {
  scroll-margin-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid #ff6b77;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: var(--navy);
  background: var(--paper);
  font-weight: 800;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  color: var(--paper);
  background: var(--navy);
  border-bottom: 1px solid rgba(255, 255, 255, .15);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand img {
  width: 154px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: #e5ebf4;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.nav a:hover {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 5px;
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 12px;
  color: var(--paper);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .4);
  border-radius: 4px;
}

.menu-toggle span {
  display: block;
  font-size: 27px;
  line-height: 1;
}

.hero {
  color: var(--paper);
  background: var(--navy);
  border-bottom: 6px solid var(--red);
}

.hero-grid {
  display: grid;
  min-height: 560px;
  grid-template-columns: minmax(0, 1.05fr) minmax(400px, .95fr);
  align-items: center;
  gap: 72px;
  padding-block: 72px;
}

.hero-copy {
  max-width: 650px;
}

.hero h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(46px, 5.2vw, 68px);
  line-height: 1.04;
  letter-spacing: -.045em;
}

.hero-lead {
  max-width: 610px;
  margin: 24px 0 0;
  color: #d5deeb;
  font-size: 19px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 32px;
}

.cta-primary {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  color: var(--paper);
  background: var(--red);
  border: 1px solid var(--red);
  border-radius: 4px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
}

.cta-primary:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
}

.text-link {
  font-weight: 700;
  text-underline-offset: 5px;
}

.hero-note {
  max-width: 610px;
  margin-top: 20px;
  padding-left: 15px;
  color: #aebbd0;
  border-left: 2px solid #72829a;
  font-size: 13px;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  width: 100%;
  height: auto;
  border: 1px solid #536985;
  border-radius: 8px;
}

.answer-strip {
  padding-block: 50px;
  background: var(--wash);
  border-bottom: 1px solid var(--line);
}

.answer-grid {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 70px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.answer-strip h2 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.14;
  letter-spacing: -.03em;
}

.answer-copy > p {
  margin: 0;
  font-size: 18px;
}

.answer-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.answer-facts li {
  padding: 18px 14px 0 0;
}

.answer-facts strong,
.answer-facts span {
  display: block;
}

.answer-facts strong {
  font-size: 17px;
}

.answer-facts span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.route-visual {
  max-width: 720px;
  margin: 42px auto 0;
}

.route-visual svg {
  width: 100%;
  height: auto;
}

.route-visual figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.section {
  padding-block: 88px;
}

.section-alt {
  background: var(--wash);
}

.section h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: -.035em;
}

.section-intro {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.purpose-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.purpose-copy {
  border-top: 2px solid var(--ink);
}

.editorial-note {
  grid-column: 2;
  margin: -52px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.purpose-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.purpose-row h3 {
  margin: 0;
  font-size: 16px;
}

.purpose-row p {
  margin: 0;
  color: var(--muted);
}

.steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin: 52px 0 0;
  padding: 0;
  list-style: none;
}

.steps::before {
  position: absolute;
  top: 23px;
  right: 16.66%;
  left: 16.66%;
  height: 2px;
  content: "";
  background: #aeb6c3;
}

.steps li {
  position: relative;
  padding-top: 68px;
  text-align: center;
}

.step-number {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 50%;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  color: var(--paper);
  background: var(--navy);
  border: 5px solid var(--wash);
  font-weight: 800;
  transform: translateX(-50%);
}

.steps h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.steps p {
  margin: 10px 0 0;
  color: var(--muted);
}

.section-visual {
  margin: 42px 0 0;
}

.section-visual img {
  width: 100%;
  height: auto;
  border: 1px solid #c8ced8;
  border-radius: 8px;
}

.section-visual figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.device-visual {
  max-width: 980px;
}

.table-wrap {
  margin-top: 36px;
  overflow-x: auto;
  border-top: 2px solid var(--ink);
}

.table-hint {
  display: none;
}

.access-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  text-align: left;
}

.access-table th,
.access-table td {
  padding: 18px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.access-table thead th {
  color: var(--paper);
  background: var(--navy);
  font-size: 14px;
}

.access-table tbody th {
  width: 22%;
  font-size: 15px;
}

.access-table td {
  color: var(--muted);
}

.support-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.support-grid h2 {
  font-size: clamp(30px, 3.4vw, 42px);
}

.security-visual {
  margin: 0 0 32px;
}

.security-visual img {
  width: 100%;
  height: auto;
  border: 1px solid #c8ced8;
  border-radius: 8px;
}

.checklist {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.checklist li {
  position: relative;
  padding: 18px 0 18px 32px;
  border-bottom: 1px solid var(--line);
}

.checklist li::before {
  position: absolute;
  top: 20px;
  left: 0;
  width: 16px;
  height: 8px;
  content: "";
  border-bottom: 2px solid var(--red);
  border-left: 2px solid var(--red);
  transform: rotate(-45deg);
}

.recovery {
  padding: 32px;
  color: var(--paper);
  background: var(--navy);
  border-top: 6px solid var(--red);
}

.recovery h3 {
  margin: 0;
  font-size: 26px;
}

.recovery p {
  margin: 16px 0 0;
  color: #cbd5e3;
}

.recovery ol {
  margin: 22px 0 0;
  padding-left: 22px;
}

.recovery li + li {
  margin-top: 12px;
}

.troubleshooting-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 2px solid var(--ink);
  border-left: 1px solid var(--line);
}

.troubleshooting-visual {
  max-width: 980px;
}

.troubleshooting-item {
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.troubleshooting-item h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.troubleshooting-item p {
  margin: 10px 0 0;
  color: var(--muted);
}

.inline-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 32px;
  padding: 24px 28px;
  color: var(--paper);
  background: var(--navy);
  border-left: 6px solid var(--red);
}

.inline-cta p {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.definition-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 2px solid var(--ink);
  border-left: 1px solid var(--line);
}

.definition-grid article {
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.definition-grid h3 {
  margin: 0;
  font-size: 20px;
}

.definition-grid p {
  margin: 12px 0 0;
  color: var(--muted);
}

.responsible {
  padding-block: 54px;
  color: var(--paper);
  background: var(--red);
}

.responsible-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 70px;
  align-items: start;
}

.responsible h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -.03em;
}

.responsible p {
  margin: 0;
  font-size: 18px;
}

.responsible-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin-top: 20px;
}

.responsible a {
  font-weight: 800;
  text-underline-offset: 4px;
}

.faq-list {
  max-width: 880px;
  margin-top: 42px;
  border-top: 2px solid var(--ink);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 22px 48px 22px 0;
  cursor: pointer;
  font-size: 19px;
  font-weight: 800;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 21px;
  right: 4px;
  content: "+";
  color: var(--red);
  font-size: 26px;
  line-height: 1;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list p {
  max-width: 760px;
  margin: 0;
  padding: 0 48px 24px 0;
  color: var(--muted);
}

.site-footer {
  padding-block: 46px;
  color: #bdc8d7;
  background: #041228;
}

.footer-grid {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 56px;
  align-items: start;
}

.footer-brand {
  display: inline-block;
  line-height: 0;
}

.footer-brand img {
  width: 180px;
  height: auto;
}

.site-footer p {
  max-width: 800px;
  margin: 0;
  font-size: 13px;
}

.site-footer p + p {
  margin-top: 12px;
}

@media (max-width: 900px) {
  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 48px;
    padding-block: 60px;
  }

  .hero-visual {
    max-width: 580px;
  }

  .purpose-grid,
  .support-grid,
  .responsible-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .answer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .answer-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .definition-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .header-inner {
    min-height: 64px;
  }

  .brand img {
    width: 136px;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    z-index: 99;
    top: 64px;
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    align-items: stretch;
    padding: 22px 16px;
    background: var(--navy);
  }

  .nav.is-open {
    display: block;
  }

  .nav a {
    display: block;
    padding: 16px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, .15);
    font-size: 17px;
  }

  .hero-grid {
    gap: 38px;
    padding-block: 46px 52px;
  }

  .hero h1 {
    font-size: clamp(40px, 12vw, 54px);
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 17px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 16px;
    margin-top: 26px;
  }

  .cta-primary {
    width: 100%;
  }

  .section {
    padding-block: 64px;
  }

  .section h2 {
    font-size: 34px;
  }

  .purpose-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .editorial-note {
    grid-column: auto;
    margin: -22px 0 0;
  }

  .troubleshooting-grid {
    grid-template-columns: 1fr;
  }

  .inline-cta {
    align-items: stretch;
    flex-direction: column;
    padding: 24px 20px;
  }

  .answer-strip {
    padding-block: 42px;
  }

  .table-hint {
    display: block;
    margin: 28px 0 8px;
    color: var(--muted);
    font-size: 13px;
  }

  .table-wrap {
    margin-top: 0;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 38px;
  }

  .steps::before {
    top: 24px;
    bottom: 30px;
    left: 23px;
    width: 2px;
    height: auto;
  }

  .steps li {
    min-height: 132px;
    padding: 4px 0 34px 72px;
    text-align: left;
  }

  .step-number {
    left: 0;
    transform: none;
  }

  .recovery {
    padding: 26px 22px;
  }

  .responsible {
    padding-block: 44px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

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