:root {
  --bg: #030406;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(255, 255, 255, 0.095);
  --text: #f3f5f7;
  --muted: #9ba4ad;
  --line: rgba(255, 255, 255, 0.14);
  --steel: #d8dde1;
  --blue: #79bfff;
  --blue-strong: #2f8cff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 70% 10%, rgba(47, 140, 255, 0.16), transparent 34rem),
    radial-gradient(circle at 15% 0%, rgba(255, 255, 255, 0.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 64px);
  background: rgba(3, 4, 6, 0.76);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.brand img {
  width: 165px;
  height: auto;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

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

.nav-cta {
  color: var(--text) !important;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
}

.menu-button {
  display: none;
  background: transparent;
  border: 0;
  width: 38px;
  height: 38px;
}

.menu-button span {
  display: block;
  height: 2px;
  background: var(--text);
  margin: 8px 0;
}

.hero {
  position: relative;
  min-height: 82vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 96px 20px 72px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(3, 4, 6, 0.25), rgba(3, 4, 6, 0.95)),
    radial-gradient(circle at 50% 35%, rgba(121, 191, 255, 0.16), transparent 32rem);
  pointer-events: none;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.24;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(circle at center, black, transparent 70%);
}

.hero-content {
  position: relative;
  width: min(920px, 100%);
  text-align: center;
}

.eyebrow {
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  font-weight: 700;
  margin: 0 0 14px;
}

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

h1 {
  font-size: clamp(52px, 8vw, 104px);
  line-height: 0.92;
  letter-spacing: -0.065em;
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1;
  letter-spacing: -0.045em;
  margin-bottom: 18px;
}

h3 {
  font-size: 22px;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.hero-copy {
  color: #cbd1d7;
  font-size: clamp(18px, 2.2vw, 24px);
  max-width: 760px;
  margin: 0 auto 30px;
}

.hero-note {
  color: var(--muted);
  max-width: 720px;
  margin: 24px auto 0;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: linear-gradient(135deg, var(--steel), #ffffff);
  color: #050607;
  box-shadow: 0 10px 36px rgba(255,255,255,0.12);
}

.button.secondary {
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--panel);
}

.trust-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: center;
  color: #dce2e8;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
}

.trust-strip span {
  padding: 20px 10px;
  border-right: 1px solid var(--line);
}

.trust-strip span:last-child {
  border-right: 0;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 96px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-copy {
  color: var(--muted);
  font-size: 18px;
  max-width: 620px;
}

.cards.three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card, .panel, .alert-shell, details {
  background: linear-gradient(180deg, var(--panel-strong), rgba(255,255,255,0.035));
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.card {
  padding: 26px;
  min-height: 260px;
}

.card-number {
  color: var(--blue);
  font-weight: 800;
  letter-spacing: 0.14em;
  margin-bottom: 44px;
}

.card p, .panel p, details p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 54px;
  align-items: center;
}

.split.reversed {
  grid-template-columns: 1fr 1fr;
}

.signal-list {
  display: grid;
  gap: 12px;
}

.signal-item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.045);
  color: #dce2e8;
}

.alert-shell {
  overflow: hidden;
}

.alert-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.alert-header strong {
  margin-left: auto;
  color: var(--blue);
}

.pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 8px rgba(121, 191, 255, 0.12);
}

.alert-body {
  padding: 30px;
}

.alert-body h3 {
  font-size: clamp(26px, 3vw, 38px);
  max-width: 850px;
}

.alert-body p {
  color: var(--muted);
  max-width: 820px;
  font-size: 17px;
}

.alert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.alert-grid div {
  padding: 18px;
  border-radius: 16px;
  background: rgba(0,0,0,0.28);
  border: 1px solid var(--line);
}

.alert-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.alert-grid strong {
  font-size: 18px;
}

.panel {
  padding: 34px;
}

.cta-section {
  width: min(1180px, calc(100% - 40px));
  margin: 40px auto;
  padding: 42px;
  border: 1px solid rgba(121, 191, 255, 0.26);
  border-radius: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background:
    radial-gradient(circle at 80% 20%, rgba(121, 191, 255, 0.2), transparent 22rem),
    var(--panel);
  box-shadow: var(--shadow);
}

.cta-section h2 {
  margin-bottom: 0;
}

.faq {
  padding-top: 70px;
}

details {
  padding: 20px 24px;
  margin-bottom: 14px;
}

summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 18px;
}

details p {
  margin: 14px 0 0;
}

.footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 38px 0 54px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
}

.footer strong {
  color: var(--text);
}

.footer p {
  margin: 5px 0 0;
}

.footer a {
  color: var(--text);
}

@media (max-width: 860px) {
  .brand img {
    width: 132px;
  }

  .menu-button {
    display: block;
  }

  .nav {
    position: absolute;
    inset: 74px 16px auto 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10, 12, 16, 0.96);
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 12px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 14px;
  }

  .hero {
    min-height: auto;
  }

  .trust-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-strip span:nth-child(2) {
    border-right: 0;
  }

  .cards.three,
  .split,
  .split.reversed,
  .alert-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 70px 0;
  }

  .cta-section {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 48px;
  }

  .hero-copy {
    font-size: 18px;
  }

  .card {
    min-height: auto;
  }
}