:root {
  --bg: #0b1220;
  --bg-elevated: #101a2b;
  --panel: #121f30;
  --panel-alt: #0d1728;
  --line: rgba(148, 163, 184, 0.24);
  --text: #edf2ff;
  --muted: #a9b7d0;
  --accent: #67e8f9;
  --accent-strong: #3dd9ff;
  --success: #34d399;
  --warning-bg: rgba(14, 116, 144, 0.16);
  --warning-line: rgba(103, 232, 249, 0.45);
  --shadow: rgba(2, 6, 23, 0.42);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

.container {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
}

.narrow {
  max-width: 820px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 18, 32, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 72px;
}

.brand {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: flex-end;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.96rem;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.hero {
  padding: 5.5rem 0 4.25rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.9fr);
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
}

h1, h2, h3 {
  line-height: 1.15;
  margin: 0 0 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  letter-spacing: -0.045em;
  max-width: 12ch;
}

h2 {
  font-size: clamp(2rem, 3vw, 2.7rem);
  letter-spacing: -0.04em;
}

h3 {
  font-size: 1.1rem;
}

.lede {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 62ch;
  margin: 0;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.82rem 1.2rem;
  border-radius: 0.9rem;
  border: 1px solid var(--line);
  font-weight: 700;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.button:hover,
.button:focus-visible {
  text-decoration: none;
  transform: translateY(-1px);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #051827;
  border-color: transparent;
  box-shadow: 0 10px 22px rgba(61, 217, 255, 0.3);
}

.button.secondary {
  background: rgba(15, 23, 42, 0.5);
  color: var(--text);
}

.hero-panel {
  background: linear-gradient(180deg, rgba(17, 25, 39, 0.95), rgba(9, 16, 26, 0.96));
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  box-shadow: 0 22px 48px var(--shadow);
  padding: 1.4rem;
}

.hero-panel dl {
  margin: 0;
  display: grid;
  gap: 1rem;
}

.hero-panel div {
  padding: 0.9rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(13, 23, 40, 0.5);
}

.hero-panel dt {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-panel dd {
  margin: 0.3rem 0 0;
  color: var(--text);
  font-weight: 600;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: rgba(17, 24, 39, 0.78);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-header {
  margin-bottom: 1.5rem;
}

.section p {
  color: var(--muted);
  font-size: 1.05rem;
  margin-top: 0;
}

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

.feature-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.2rem 1.1rem;
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.18);
}

.feature-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.feature-item p {
  margin: 0;
  font-size: 0.96rem;
}

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

.card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: linear-gradient(180deg, rgba(18, 31, 48, 0.95), rgba(13, 23, 40, 0.92));
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.25rem 1.15rem;
  color: var(--text);
  box-shadow: 0 12px 28px rgba(2, 6, 23, 0.18);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.card:hover,
.card:focus-visible {
  text-decoration: none;
  transform: translateY(-2px);
  border-color: rgba(103, 232, 249, 0.5);
}

.card-label {
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}

.card strong {
  font-size: 1.08rem;
  line-height: 1.3;
}

.card small {
  color: var(--muted);
  font-size: 0.9rem;
}

.warning-box {
  background: var(--warning-bg);
  border: 1px solid var(--warning-line);
  border-radius: 1.1rem;
  padding: 1.5rem;
}

.warning-box p:last-child {
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 0.9rem;
}

.faq-list details {
  background: rgba(17, 24, 39, 0.76);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  padding: 1rem 1.1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

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

.faq-list p {
  margin: 0.8rem 0 0;
  font-size: 0.98rem;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.4rem;
  margin-top: 1.25rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(8, 13, 22, 0.9);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
  color: var(--muted);
  font-size: 0.95rem;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .hero-inner,
  .feature-grid,
  .cards {
    grid-template-columns: 1fr 1fr;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 679px) {
  .header-inner {
    padding-top: 10px;
    padding-bottom: 10px;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .header-inner,
  .site-nav,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 4rem;
  }

  .feature-grid,
  .cards {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}