:root {
  --bg: #f7fbff;
  --surface: #ffffff;
  --surface-soft: #edf8ff;
  --text: #071323;
  --muted: #5a6b7f;
  --primary: #235cff;
  --primary-dark: #1038b8;
  --cyan: #00d4c6;
  --border: rgba(7, 19, 35, 0.1);
  --shadow: 0 24px 80px rgba(20, 55, 110, 0.14);
  --radius: 28px;
  --container: 1160px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(0, 212, 198, 0.16), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(35, 92, 255, 0.14), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

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

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

.narrow {
  width: min(100% - 40px, 820px);
}

.section {
  padding: 92px 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(247, 251, 255, 0.78);
  border-bottom: 1px solid var(--border);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 1.08rem;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background:
    linear-gradient(135deg, var(--primary), var(--cyan));
  box-shadow: 0 0 32px rgba(0, 212, 198, 0.5);
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 50%;
  background: var(--surface);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 600;
}

.nav-links a:hover { color: var(--primary); }

.nav-cta {
  color: var(--primary) !important;
  border: 1px solid rgba(35, 92, 255, 0.18);
  border-radius: 999px;
  padding: 10px 16px;
  background: rgba(35, 92, 255, 0.06);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
}

.hero {
  padding-top: 118px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 64px;
  align-items: center;
}

.eyebrow {
  color: var(--primary);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin: 0 0 14px;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  font-size: clamp(3rem, 7vw, 5.9rem);
  line-height: 0.94;
  letter-spacing: -0.075em;
  margin-bottom: 28px;
}

h2 {
  font-size: clamp(2.1rem, 4vw, 3.65rem);
  line-height: 1;
  letter-spacing: -0.055em;
  margin-bottom: 20px;
}

h3 {
  font-size: 1.28rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.hero-text, .intro p, .section-heading p, .research p, .newsletter p, .site-footer p {
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid transparent;
  cursor: pointer;
}

.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 16px 40px rgba(35, 92, 255, 0.28);
}

.button.secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-row span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.hero-visual {
  min-height: 540px;
  border-radius: 48px;
  position: relative;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.85), rgba(237,248,255,0.78));
  border: 1px solid rgba(255,255,255,0.8);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(8px);
}

.orb-one {
  width: 250px;
  height: 250px;
  left: -70px;
  top: 40px;
  background: rgba(0, 212, 198, 0.34);
}

.orb-two {
  width: 320px;
  height: 320px;
  right: -100px;
  bottom: -80px;
  background: rgba(35, 92, 255, 0.28);
}

.dna-card {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(72%, 340px);
  min-height: 350px;
  background: rgba(255,255,255,0.82);
  border: 1px solid rgba(255,255,255,0.9);
  border-radius: 34px;
  box-shadow: 0 30px 90px rgba(15, 35, 80, 0.18);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 34px;
  text-align: center;
}

.dna-card p { color: var(--muted); font-weight: 700; margin-bottom: 6px; }
.dna-card strong { font-size: 3.8rem; letter-spacing: -0.06em; line-height: 1; }
.dna-card small { color: var(--muted); }

.dna-strand {
  width: 90px;
  height: 150px;
  display: grid;
  gap: 7px;
  margin-bottom: 28px;
}

.dna-strand span {
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  transform: rotate(var(--angle));
}

.dna-strand span:nth-child(odd) { --angle: 18deg; }
.dna-strand span:nth-child(even) { --angle: -18deg; }

.intro {
  text-align: center;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 42px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.topic-card,
.article-grid article,
.seo-list div,
.newsletter-box {
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow: 0 16px 60px rgba(20, 55, 110, 0.08);
}

.topic-card {
  border-radius: var(--radius);
  padding: 30px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
}

.card-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--surface-soft);
  color: var(--primary);
  font-weight: 900;
  margin-bottom: 26px;
}

.topic-card p {
  color: var(--muted);
  flex: 1;
}

.topic-card a {
  color: var(--primary);
  font-weight: 800;
}

.research {
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.55), transparent);
}

.split {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 48px;
  align-items: start;
}

.seo-list {
  display: grid;
  gap: 14px;
}

.seo-list div {
  border-radius: 22px;
  padding: 22px;
  display: grid;
  gap: 4px;
}

.seo-list strong { font-size: 1.05rem; }
.seo-list span { color: var(--muted); }

.article-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.article-grid article {
  border-radius: 24px;
  padding: 24px;
  min-height: 220px;
}

.article-grid p {
  color: var(--primary);
  font-weight: 800;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.article-grid span { color: var(--muted); }

.accordion {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.accordion-item {
  text-align: left;
  padding: 22px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}

.accordion-item span {
  display: block;
  font-weight: 800;
  font-size: 1rem;
}

.accordion-item small {
  display: none;
  color: var(--muted);
  margin-top: 10px;
  font-size: 0.95rem;
}

.accordion-item.is-open small { display: block; }

.newsletter-box {
  border-radius: 36px;
  padding: 42px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: center;
}

.newsletter-form {
  display: flex;
  gap: 10px;
  background: var(--surface);
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.newsletter-form input {
  border: 0;
  outline: 0;
  min-width: 250px;
  padding: 0 14px;
  font: inherit;
  background: transparent;
}

.site-footer {
  padding: 54px 0 28px;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.5);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr 0.6fr;
  gap: 40px;
}

.site-footer h3 {
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.site-footer a:not(.brand) {
  display: block;
  color: var(--muted);
  margin: 8px 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 38px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }

  .nav-links {
    position: absolute;
    top: 76px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    border-radius: 20px;
    background: var(--surface);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
  }

  .nav-links.is-open { display: flex; }

  .hero-grid,
  .split,
  .newsletter-box,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero { padding-top: 72px; }
  .hero-visual { min-height: 420px; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .newsletter-form { width: 100%; }
  .newsletter-form input { min-width: 0; width: 100%; }
}

@media (max-width: 620px) {
  .section { padding: 66px 0; }
  .container, .narrow { width: min(100% - 28px, var(--container)); }
  .card-grid, .article-grid { grid-template-columns: 1fr; }
  .hero-actions, .newsletter-form, .footer-bottom { flex-direction: column; }
  .newsletter-form { border-radius: 24px; }
  .newsletter-form input { min-height: 48px; }
  .button { width: 100%; }
  .newsletter-box { padding: 28px; }
}