:root {
  --bg: #090c12;
  --surface: #0f141d;
  --text: #edf1f6;
  --soft: #9aa8b9;
  --muted: #5c6b7e;
  --accent: #40c4ff;
  --line: rgba(154, 168, 185, 0.12);
  --sans: "Segoe UI", system-ui, sans-serif;
  --mono: "Cascadia Mono", Consolas, monospace;
  --max: 1040px;
  --pad: clamp(1.25rem, 4vw, 2rem);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 17px;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: var(--sans);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--bg); }

a { color: inherit; }

a:focus-visible, summary:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip {
  position: absolute; left: -9999px; top: 0;
  padding: 0.5rem 1rem; background: var(--accent); color: var(--bg); z-index: 100;
}
.skip:focus { left: 0; }

.ambient {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 80% 10%, rgba(64, 196, 255, 0.07), transparent),
    radial-gradient(ellipse 60% 40% at 10% 80%, rgba(99, 102, 241, 0.05), transparent);
}

.ambient__orb, .ambient__grid { display: none; }

.masthead {
  position: sticky; top: 0; z-index: 50;
  background: rgba(9, 12, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.masthead__inner {
  max-width: var(--max); margin: 0 auto;
  padding: 1rem var(--pad);
  display: flex; align-items: center; justify-content: space-between;
}

.mark {
  font-family: var(--mono); font-size: 0.9rem; font-weight: 500;
  text-decoration: none; color: var(--text);
}
.mark:hover { color: var(--accent); }

.masthead__nav {
  display: flex; align-items: center; gap: 1.5rem;
}

.masthead__nav a {
  font-size: 0.8rem; text-decoration: none; color: var(--muted);
  transition: color 0.15s;
}
.masthead__nav a:hover { color: var(--text); }

.masthead__cta {
  color: var(--accent) !important;
  font-weight: 600;
}

.page {
  position: relative; z-index: 1;
  max-width: var(--max); margin: 0 auto;
  padding: 0 var(--pad) 4rem;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  min-height: min(88vh, 720px);
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(3rem, 8vw, 5rem);
  border-bottom: 1px solid var(--line);
}

.hero__eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--mono); font-size: 0.7rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
}

.hero__title {
  margin: 0 0 1.5rem;
  font-size: clamp(2.5rem, 5.5vw, 4.25rem);
  font-weight: 700; line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero__accent { color: var(--accent); }

.hero__lede {
  margin: 0 0 1rem;
  font-size: 1.1rem; line-height: 1.55;
  color: var(--soft); max-width: 36ch;
}

.hero__note {
  margin: 0 0 2rem;
  font-size: 0.95rem; color: var(--muted); max-width: 34ch;
}

.hero__cta {
  display: inline-block;
  font-family: var(--mono); font-size: 0.95rem;
  color: var(--accent); text-decoration: none;
  border-bottom: 1px solid rgba(64, 196, 255, 0.4);
  padding-bottom: 0.15rem;
  transition: border-color 0.15s, color 0.15s;
}
.hero__cta:hover {
  color: var(--text);
  border-color: var(--text);
}

.hero__visual {
  display: flex; justify-content: center; align-items: center;
}

.network {
  width: 100%; max-width: 380px; height: auto;
  opacity: 0.9;
}

.network__line {
  stroke: url(#line-grad); stroke-width: 1.5;
  stroke-dasharray: 4 6;
  animation: flow 5s linear infinite;
}
.network__line:nth-child(2) { animation-delay: -1s; }
.network__line:nth-child(3) { animation-delay: -2s; }
.network__line:nth-child(4) { animation-delay: -3s; }
.network__line:nth-child(5) { animation-delay: -4s; }

@keyframes flow { to { stroke-dashoffset: -20; } }

.network__hub {
  fill: var(--surface); stroke: var(--accent); stroke-width: 2;
}
.network__node {
  fill: var(--bg); stroke: rgba(64, 196, 255, 0.5); stroke-width: 1.5;
}
.network__pulse { opacity: 0.5; }
.network__label {
  font-family: var(--mono); font-size: 11px; fill: var(--accent);
}
.network__label--sm {
  font-size: 9px; fill: var(--muted);
}

.block {
  padding: clamp(3.5rem, 8vw, 5rem) 0;
  border-bottom: 1px solid var(--line);
}

.block__head {
  margin-bottom: 2rem;
}

.block__head h2 {
  margin: 0;
  font-size: 0.72rem; font-family: var(--mono);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); font-weight: 500;
}

.block__intro {
  margin: 0.75rem 0 0;
  font-size: 1rem; color: var(--soft); max-width: 40ch;
}

.services {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 3rem;
}

.service h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem; font-weight: 600;
  letter-spacing: -0.01em;
}

.service p {
  margin: 0;
  font-size: 0.95rem; line-height: 1.6;
  color: var(--muted);
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}

.stack-item {
  display: flex; flex-direction: column; gap: 0.25rem;
  padding: 1rem 1.1rem;
  background: var(--surface);
}

.stack-item strong {
  font-family: var(--mono); font-size: 0.65rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); font-weight: 500;
}

.stack-item span {
  font-size: 0.88rem; color: var(--soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.step__n {
  display: block;
  margin-bottom: 0.75rem;
  font-family: var(--mono); font-size: 0.75rem;
  color: var(--muted);
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem; font-weight: 600;
}

.step p {
  margin: 0;
  font-size: 0.9rem; color: var(--muted); line-height: 1.55;
}

.faq details {
  border-bottom: 1px solid var(--line);
}
.faq details:first-child {
  border-top: 1px solid var(--line);
}

.faq summary {
  padding: 1.1rem 0;
  font-weight: 600; font-size: 0.95rem;
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-family: var(--mono); font-weight: 400;
  color: var(--accent); font-size: 1.1rem;
}
.faq details[open] summary::after { content: "−"; }

.faq p {
  margin: 0 0 1.1rem;
  font-size: 0.92rem; color: var(--muted); line-height: 1.6;
  max-width: 60ch;
}
.faq a { color: var(--accent); }

.block--contact {
  border-bottom: none;
  text-align: center;
  padding-bottom: 2rem;
}

.contact-lead {
  margin: 0 0 2rem;
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  color: var(--soft);
}

.contact-form {
  max-width: 32rem;
  margin: 0 auto;
  text-align: left;
}

.contact-form label {
  display: block;
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-form .optional {
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  opacity: 0.7;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  margin: 0 0 1.1rem;
  padding: 0.7rem 0.8rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.contact-form textarea {
  min-height: 9rem;
  resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: rgba(64, 196, 255, 0.45);
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.contact-submit {
  appearance: none;
  background: none;
  border: 0;
  padding: 0 0 0.15rem;
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--accent);
  border-bottom: 1px solid rgba(64, 196, 255, 0.4);
  cursor: pointer;
}
.contact-submit:hover { color: var(--text); border-color: var(--text); }
.contact-submit:disabled { opacity: 0.5; cursor: wait; }

.contact-status {
  min-height: 1.4em;
  margin: 1rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}
.contact-status--ok { color: var(--accent); }
.contact-status--error { color: #f0a0a0; }

.foot {
  position: relative; z-index: 1;
  max-width: var(--max); margin: 0 auto;
  padding: 1.5rem var(--pad) 2.5rem;
  border-top: 1px solid var(--line);
}

.foot p {
  margin: 0;
  font-family: var(--mono); font-size: 0.7rem;
  color: var(--muted);
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 2rem;
  }
  .hero__visual { order: -1; max-width: 280px; margin: 0 auto; }
  .services { grid-template-columns: 1fr; gap: 2rem; }
  .stack-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; gap: 1.5rem; }
}

@media (max-width: 600px) {
  html { font-size: 16px; }
  .masthead__nav { gap: 1rem; font-size: 0.75rem; }
  .masthead__nav a:not(.masthead__cta) { display: none; }
  .stack-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}