* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', Arial, Helvetica, sans-serif;
  background: #05070D;
  color: #E6EDF3;
  line-height: 1.65;
  min-height: 100vh;
}

body,
button,
input,
textarea,
select {
  font-family: 'Inter', system-ui, sans-serif;
}

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

button,
.button {
  font-family: 'Inter', system-ui, sans-serif;
}

.site-header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(5, 7, 13, 0.88);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.05em;
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: rgba(230,237,243,0.8);
}

.nav-links a {
  transition: color 180ms ease;
}

.nav-links a:hover {
  color: #00C2FF;
}

.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  background: radial-gradient(circle at 20% 20%, rgba(0,194,255,0.12), transparent 24%),
              radial-gradient(circle at 80% 15%, rgba(0,194,255,0.08), transparent 18%),
              linear-gradient(180deg, #05070D 0%, #070B14 100%);
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px),
                    linear-gradient(180deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 120px 120px;
  pointer-events: none;
  opacity: 0.18;
}

.hero-content {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  padding: 100px 24px;
}

.eyebrow {
  color: #00C2FF;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 22px;
}

h1 {
  font-size: clamp(44px, 5vw, 70px);
  line-height: 1.03;
  letter-spacing: -0.05em;
  max-width: 760px;
  margin-bottom: 28px;
}

.hero-text {
  max-width: 720px;
  font-size: 18px;
  color: rgba(230,237,243,0.84);
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.button.primary {
  background: #00C2FF;
  color: #05070D;
  border: 1px solid transparent;
}

.button.primary:hover {
  background: #4fe0ff;
  transform: translateY(-2px);
}

.button.secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.18);
  color: #E6EDF3;
}

.button.secondary:hover {
  border-color: #00C2FF;
  color: #00C2FF;
  transform: translateY(-2px);
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 96px 24px;
}

.dark-section {
  background: linear-gradient(180deg, #070B14 0%, #09111B 100%);
  border-radius: 24px;
  padding: 96px 24px;
  margin-top: 18px;
  margin-bottom: 18px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-heading h2 {
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 18px;
}

.section-heading p {
  color: rgba(230,237,243,0.82);
  font-size: 16px;
  line-height: 1.85;
}

.grid {
  display: grid;
  gap: 22px;
}

.overview-grid,
.use-case-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.frequency-grid,
.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 28px;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(0,194,255,0.25);
  box-shadow: 0 10px 30px rgba(0,194,255,0.04);
}

.card h3 {
  font-size: 20px;
  letter-spacing: -0.04em;
  margin-bottom: 14px;
}

.card p {
  color: rgba(230,237,243,0.8);
  font-size: 15px;
  line-height: 1.8;
}

.field-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.field-item {
  padding: 20px 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  color: rgba(230,237,243,0.95);
  font-size: 14px;
  letter-spacing: -0.02em;
}

.quality-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.quality-item {
  padding: 20px 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
}

.quality-item h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: #E6EDF3;
}

.quality-item p {
  color: rgba(230,237,243,0.78);
  font-size: 15px;
  line-height: 1.8;
}

.access-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.access-copy p {
  color: rgba(230,237,243,0.8);
  line-height: 1.8;
}

.response-note {
  margin-top: 12px;
  color: rgba(230,237,243,0.65);
  font-size: 14px;
}

.contact-section {
  text-align: center;
}

.contact-section .section-heading {
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.email {
  margin-top: 22px;
  font-size: 20px;
  font-weight: 700;
}

.email a {
  color: #00C2FF;
}

.footer {
  padding: 30px 24px;
  text-align: center;
  color: rgba(230,237,243,0.52);
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 14px;
}

@media (max-width: 960px) {
  .overview-grid,
  .use-case-grid,
  .frequency-grid,
  .grid.three,
  .field-list,
  .quality-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding: 80px 20px;
  }

  .access-box {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 620px) {
  .site-header {
    position: static;
  }

  .nav {
    padding: 18px 18px;
  }

  .nav-links {
    gap: 16px;
    justify-content: center;
  }

  h1 {
    font-size: 42px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .section {
    padding: 80px 20px;
  }

  .dark-section {
    padding: 80px 20px;
  }
}