:root {
  --navy: #04152b;
  --navy-soft: #092441;
  --blue: #1688f8;
  --ice: #e9f5ff;
  --white: #ffffff;
  --muted: #aabbd0;
  --line: rgba(255, 255, 255, 0.14);
  --shell: min(1120px, calc(100vw - 40px));
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 320px;
  color: var(--white);
  background:
    radial-gradient(circle at 85% 10%, rgba(22, 136, 248, 0.18), transparent 28rem),
    var(--navy);
  font-family: "DM Sans", sans-serif;
  line-height: 1.65;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.seo-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(4, 21, 43, 0.92);
}

.seo-header .shell {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.seo-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.seo-brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.seo-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.seo-nav a:hover,
.seo-nav a[aria-current="page"] {
  color: var(--white);
}

.seo-hero {
  padding: clamp(6rem, 13vw, 10rem) 0 clamp(4rem, 8vw, 7rem);
}

.eyebrow {
  margin: 0 0 1.2rem;
  color: #76bfff;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.seo-hero h1 {
  max-width: 930px;
  margin: 0;
  font-family: "Bricolage Grotesque", sans-serif;
  font-size: clamp(3.4rem, 8.8vw, 7.8rem);
  font-weight: 610;
  letter-spacing: -0.07em;
  line-height: 0.88;
}

.seo-hero .lead {
  max-width: 700px;
  margin: 2.2rem 0 0;
  color: var(--ice);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.seo-actions {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.seo-button {
  min-height: 50px;
  padding: 0.8rem 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  font-size: 0.86rem;
  font-weight: 700;
}

.seo-button.primary {
  border-color: var(--blue);
  background: var(--blue);
}

.seo-section {
  padding: clamp(4.5rem, 9vw, 7rem) 0;
  border-top: 1px solid var(--line);
}

.seo-section.alt {
  background: var(--navy-soft);
}

.seo-section h2 {
  max-width: 800px;
  margin: 0 0 1.8rem;
  font-family: "Bricolage Grotesque", sans-serif;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.seo-section > .shell > p,
.prose p {
  max-width: 780px;
  color: var(--muted);
}

.seo-grid {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.seo-card {
  min-height: 250px;
  padding: clamp(1.5rem, 3vw, 2.4rem);
  background: var(--navy);
}

.seo-card small {
  color: #75bdff;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.seo-card h3 {
  margin: 2.5rem 0 0.8rem;
  font-family: "Bricolage Grotesque", sans-serif;
  font-size: 1.55rem;
}

.seo-card p {
  margin: 0;
  color: var(--muted);
}

.seo-list {
  max-width: 780px;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.seo-list li {
  padding: 1rem 0;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 0.7rem;
  border-top: 1px solid var(--line);
  color: var(--ice);
}

.seo-list li::before {
  content: ">";
  color: var(--blue);
}

.seo-callout {
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid rgba(117, 189, 255, 0.32);
  background: linear-gradient(135deg, rgba(22, 136, 248, 0.16), rgba(255, 255, 255, 0.02));
}

.seo-callout p {
  max-width: 740px;
  color: var(--ice);
  font-size: 1.1rem;
}

.seo-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.seo-footer .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
}

.seo-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 760px) {
  .seo-header .shell {
    min-height: 70px;
  }

  .seo-brand span {
    font-size: 0.75rem;
  }

  .seo-nav a:not([aria-current="page"]) {
    display: none;
  }

  .seo-hero {
    padding-top: 5rem;
  }

  .seo-hero h1 {
    overflow-wrap: anywhere;
    font-size: clamp(2.7rem, 13vw, 3.4rem);
  }

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

  .seo-card {
    min-height: 0;
  }

  .seo-footer .shell {
    align-items: flex-start;
    flex-direction: column;
  }
}