:root {
  color-scheme: dark;
  --background: #101214;
  --foreground: #fafafa;
  --surface: #191b1f;
  --surface-2: #24272c;
  --card: #1b1d21;
  --border: #2b3036;
  --muted: #272b31;
  --muted-foreground: #aab3bf;
  --primary: #fafafa;
  --primary-foreground: #2b2d2f;
  --valid: #2fda72;
  --invalid: #ff3045;
  --info: #14a8ff;
  --warn: #ff9f1c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 68% 18%, rgba(20,168,255,.07), transparent 26%),
    var(--background);
  color: var(--foreground);
  font-family: "Space Grotesk", "Inter", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
svg { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--border);
  background: rgba(16, 18, 20, .86);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1152px;
  min-height: 74px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  letter-spacing: -0.01em;
}
.brand svg { width: 28px; height: 28px; }
.brand span span { color: var(--muted-foreground); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted-foreground);
  font-size: 14px;
  font-weight: 650;
}
.nav-links a:not(.button):hover { color: var(--foreground); }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 6px;
  background: var(--primary);
  color: var(--primary-foreground);
  font-weight: 800;
  box-shadow: none;
}
.button:hover { filter: brightness(.94); }
.button.small {
  min-height: 46px;
  margin-left: 8px;
  padding: 10px 16px;
}
.button.ghost {
  background: var(--surface);
  color: var(--foreground);
  border: 1px solid var(--border);
}
.button.ghost:hover { background: var(--surface-2); filter: none; }

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.grid-bg {
  position: absolute;
  inset: 0;
  opacity: .72;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 32px 32px;
}
.hero-fade {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 74% 24%, rgba(20,168,255,.12), transparent 34%),
    linear-gradient(to bottom, transparent 0%, transparent 56%, var(--background) 100%);
}
.hero-inner {
  position: relative;
  max-width: 1152px;
  margin: 0 auto;
  padding: 112px 24px;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 40px;
  align-items: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 12px;
  border: 1px solid rgba(20,168,255,.30);
  border-radius: 999px;
  background: rgba(20,168,255,.10);
  color: var(--info);
  font-size: 12px;
  font-weight: 750;
}
.badge svg { width: 14px; height: 14px; }
h1 {
  margin: 20px 0 0;
  max-width: 760px;
  font-size: clamp(48px, 6.2vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
h1 span, .invalid { color: var(--invalid); }
.valid { color: var(--valid); }
.info { color: var(--info); }
.lead {
  margin: 20px 0 0;
  max-width: 610px;
  color: var(--muted-foreground);
  font-size: 18px;
  line-height: 1.55;
}
.lead strong { color: var(--foreground); }
.lead em {
  font-style: normal;
  font-weight: 800;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: 520px;
  margin: 40px 0 0;
}
.stats dt {
  color: var(--muted-foreground);
  font-size: 14px;
}
.stats dd {
  margin: 4px 0 0;
  font-size: 26px;
  font-weight: 850;
  letter-spacing: -0.02em;
}

.demo-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  padding: 20px;
  box-shadow: 0 28px 70px rgba(0,0,0,.42);
}
.demo-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted-foreground);
  font-size: 12px;
}
.demo-top span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.demo-top i {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--info);
  animation: pulse 1.6s ease-in-out infinite;
}
.demo-valid {
  margin-top: 16px;
  padding: 20px;
  border: 1px solid rgba(47,218,114,.40);
  border-radius: 12px;
  background: rgba(47,218,114,.10);
}
.demo-valid small {
  display: block;
  color: var(--valid);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  font-weight: 850;
}
.demo-valid strong {
  display: block;
  margin-top: 8px;
  font-family: "JetBrains Mono", Consolas, ui-monospace, monospace;
  font-size: clamp(54px, 5.5vw, 72px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: .08em;
  font-variant-numeric: tabular-nums;
}
.demo-valid p {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  color: var(--valid);
  font-size: 14px;
}
.demo-valid svg { width: 16px; height: 16px; }
.demo-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  font-size: 14px;
}
.demo-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 8px 0;
  border-top: 1px solid var(--border);
}
.demo-list li:first-child { border-top: 0; }
.demo-list span {
  display: flex;
  align-items: center;
  gap: 13px;
}
.demo-list strong {
  font-family: "JetBrains Mono", Consolas, ui-monospace, monospace;
  font-size: 20px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: .08em;
}
.demo-list small {
  color: var(--muted-foreground);
  font-size: 14px;
}
.row-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  stroke-width: 2.8;
}
.row-icon.x {
  color: var(--invalid);
}
.row-icon.check {
  color: var(--valid);
}

.section {
  border-bottom: 1px solid var(--border);
}
.surface { background: rgba(25,27,31,.54); }
.section-inner {
  max-width: 1152px;
  margin: 0 auto;
  padding: 80px 24px;
}
h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.025em;
}
.section-lead {
  margin: 12px 0 0;
  max-width: 700px;
  color: var(--muted-foreground);
  font-size: 17px;
  line-height: 1.55;
}
.steps {
  list-style: none;
  padding: 0;
  margin: 40px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.steps li {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
}
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
}
.icon svg { width: 20px; height: 20px; }
.icon.info { background: rgba(20,168,255,.15); color: var(--info); }
.icon.warn { background: rgba(255,159,28,.16); color: var(--warn); }
.icon.valid { background: rgba(47,218,114,.15); color: var(--valid); }
.icon.invalid { background: rgba(255,48,69,.16); color: var(--invalid); }
.steps h3 {
  margin: 16px 0 0;
  font-size: 18px;
}
.steps p {
  margin: 6px 0 0;
  color: var(--muted-foreground);
  font-size: 14px;
  line-height: 1.55;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.feature-list {
  display: grid;
  gap: 16px;
}
.feature-list article {
  display: flex;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
}
.feature-icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--surface-2);
}
.feature-icon svg { width: 20px; height: 20px; }
.feature-list h3 {
  margin: 0;
  font-size: 18px;
}
.feature-list p {
  margin: 6px 0 0;
  color: var(--muted-foreground);
  font-size: 14px;
  line-height: 1.55;
}

.integration-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px;
  align-items: start;
  padding-top: 64px;
  padding-bottom: 64px;
}
.integration h3 {
  margin: 0;
  font-size: 24px;
}
.integration p {
  margin: 8px 0 0;
  color: var(--muted-foreground);
  font-size: 14px;
}
.tags {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.tag {
  display: block;
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid currentColor;
  font-weight: 750;
  background: color-mix(in srgb, currentColor 10%, transparent);
}
.tag.info { color: var(--info); }
.tag.valid { color: var(--valid); }
.tag.warn { color: var(--warn); }

.contact { text-align: center; }
.contact .section-inner {
  max-width: 896px;
  padding-top: 96px;
  padding-bottom: 96px;
}
.contact-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted-foreground);
  font-size: 12px;
}
.contact-badge svg { width: 14px; height: 14px; }
.contact h2 { margin-top: 20px; }
.contact .section-lead {
  margin-left: auto;
  margin-right: auto;
  font-size: 18px;
}
.mail-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  padding: 16px 24px;
  border: 1px solid rgba(20,168,255,.40);
  border-radius: 12px;
  background: rgba(20,168,255,.10);
  color: var(--info);
  font-size: 20px;
  font-weight: 800;
}
.mail-button:hover { background: rgba(20,168,255,.15); }
.mail-button svg { width: 20px; height: 20px; }
.company {
  margin: 24px 0 0;
  color: var(--muted-foreground);
  font-size: 14px;
}

footer { padding: 32px 0; }
.footer-inner {
  max-width: 1152px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted-foreground);
  font-size: 12px;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-brand svg { width: 18px; height: 18px; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}

@media (max-width: 900px) {
  .nav-links a:not(.button) { display: none; }
  .hero-inner,
  .feature-grid,
  .integration-grid {
    grid-template-columns: 1fr;
  }
  .steps,
  .tags {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .nav-inner { min-height: 64px; padding: 0 16px; }
  .brand svg { width: 24px; height: 24px; }
  .button.small { padding: 9px 12px; }
  .hero-inner { padding: 64px 16px; }
  .section-inner { padding: 56px 16px; }
  .stats,
  .steps,
  .tags {
    grid-template-columns: 1fr;
  }
  .demo-card { padding: 16px; }
  .demo-valid strong { font-size: 44px; }
  .footer-inner {
    flex-direction: column;
    justify-content: center;
  }
}