:root {
  --bg: #060a13;
  --surface: #0d1424;
  --surface-2: #121b31;
  --border: #1f2a44;
  --text: #e6ebf5;
  --muted: #a3afc7;
  --cyan: #38d5ff;
  --violet: #8b7bff;
  --focus: #ffd166;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(56, 213, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 213, 255, .035) 1px, transparent 1px);
  background-size: 48px 48px;
}

a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: #8fe8ff; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip { position: absolute; left: -999px; top: 0; background: var(--cyan); color: #04101c; padding: 12px 16px; z-index: 10; font-weight: 600; }
.skip:focus { left: 8px; top: 8px; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

header.site {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(6, 10, 19, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0 24px; }
.logo { display: inline-flex; align-items: center; gap: 10px; min-height: 60px; font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; letter-spacing: .01em; }
.logo:hover { color: var(--text); }
.logo svg { width: 32px; height: 32px; }

nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0 2px; margin: 0; padding: 0; }
nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 500; }
nav a:hover { color: var(--cyan); }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 72px 0 80px; }
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(139, 123, 255, .22), transparent 65%);
  pointer-events: none;
}
.hero .wrap { position: relative; display: grid; gap: 32px; grid-template-columns: 1.1fr .9fr; align-items: center; }
.eyebrow { font-family: var(--mono); font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; color: var(--cyan); margin: 0 0 16px; }
.hero h1 { font-size: clamp(2rem, 5.5vw, 3.2rem); line-height: 1.1; margin: 0 0 20px; letter-spacing: -.02em; }
.grad { background: linear-gradient(90deg, var(--cyan), var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--muted); max-width: 540px; margin: 0 0 28px; font-size: 1.15rem; }
.net { width: 100%; height: auto; max-width: 440px; justify-self: center; }
.net line { stroke: rgba(56, 213, 255, .35); stroke-width: 1.2; }
.net circle { fill: var(--cyan); }
.net circle.v { fill: var(--violet); }
.net circle.pulse { animation: pulse 3.2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.net circle.d2 { animation-delay: .8s; }
.net circle.d3 { animation-delay: 1.6s; }
@keyframes pulse { 0%, 100% { opacity: .55; transform: scale(1); } 50% { opacity: 1; transform: scale(1.5); } }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 26px;
  background: linear-gradient(90deg, var(--cyan), #7fa8ff);
  color: #04101c; font-weight: 700; text-decoration: none; border-radius: 8px;
  box-shadow: 0 0 24px rgba(56, 213, 255, .25);
}
.btn:hover { color: #04101c; filter: brightness(1.1); }

section { padding: 64px 0; }
section.alt { background: rgba(13, 20, 36, .7); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin: 0 0 20px; line-height: 1.2; letter-spacing: -.01em; }
h3 { font-size: 1.1rem; margin: 0 0 8px; }
.kicker { font-family: var(--mono); font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; color: var(--violet); margin: 0 0 8px; }
.kicker-bright { color: #b3a8ff; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 24px; transition: border-color .2s, box-shadow .2s; }
.card:hover { border-color: rgba(56, 213, 255, .5); box-shadow: 0 0 28px rgba(56, 213, 255, .08); }
.card p { margin: 0; color: var(--muted); }
.card .idx { font-family: var(--mono); font-size: .8rem; color: var(--cyan); display: block; margin-bottom: 10px; }

.product {
  background: linear-gradient(135deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border); border-radius: 16px; padding: 36px;
}
.product p { color: var(--muted); max-width: 720px; margin: 0; }
.tag { display: inline-block; font-family: var(--mono); font-size: .8rem; color: var(--cyan); border: 1px solid rgba(56, 213, 255, .4); border-radius: 999px; padding: 2px 12px; margin-bottom: 14px; }

.mail { font-family: var(--mono); font-size: clamp(1rem, 4vw, 1.35rem); display: inline-block; padding: 10px 0; min-height: 44px; word-break: break-all; }

footer.site { border-top: 1px solid var(--border); padding: 36px 0; font-size: .95rem; color: var(--muted); }
footer.site p { margin: 0 0 6px; }
footer.site strong { color: var(--text); }
footer.site a { display: inline-block; padding: 10px 0; min-height: 44px; }

.prose { max-width: 740px; padding: 48px 0; }
.prose h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 16px; }
.prose h2 { font-size: 1.3rem; margin-top: 32px; }
.prose p { color: var(--muted); }
.notice { border-left: 4px solid var(--focus); background: rgba(255, 209, 102, .08); padding: 12px 16px; margin: 0 0 24px; color: var(--text); }
.notice, .prose p.notice { color: var(--text); }

@media (max-width: 800px) {
  .grid.two { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 48px; }
  .hero .wrap { grid-template-columns: 1fr; }
  .net { max-width: 300px; }
  .product { padding: 24px; }
  section { padding: 48px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .net circle.pulse { animation: none; }
  .card { transition: none; }
}
.prose li { color: var(--muted); margin-bottom: 6px; }
.prose strong { color: var(--text); }