:root {
  --bg: #05070d;
  --bg-2: #0a1220;
  --ink: #e9f6ff;
  --muted: #8aa0b8;
  --cyan: #64f0ff;
  --magenta: #ff5ca8;
  --line: rgba(100, 240, 255, 0.18);
  --glass: rgba(8, 16, 28, 0.72);
  --radius: 18px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

section[id] { scroll-margin-top: 92px; }

body {
  min-height: 100vh;
  color: var(--ink);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(255, 92, 168, 0.16), transparent 55%),
              radial-gradient(900px 500px at -10% 20%, rgba(100, 240, 255, 0.12), transparent 50%),
              var(--bg);
  font-family: "Noto Sans SC", sans-serif;
  overflow-x: hidden;
}

#field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.scanlines,
.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.scanlines {
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 2px,
    rgba(0, 0, 0, 0.12) 2px 3px
  );
  opacity: 0.25;
}

.vignette {
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, 0.55) 100%);
}

.nav,
main,
.foot {
  position: relative;
  z-index: 2;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 7vw;
  background: linear-gradient(to bottom, rgba(5, 7, 13, 0.96), rgba(5, 7, 13, 0.78) 70%, rgba(5, 7, 13, 0.35));
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  border-bottom-color: var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  transform: rotate(45deg);
}

.brand-text {
  font-family: Oxanium, sans-serif;
  font-weight: 700;
  letter-spacing: 0.28em;
  font-size: 14px;
}

.brand-text span { color: var(--cyan); }

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.18em;
  padding: 10px 14px;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
}

.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  box-shadow: 0 0 8px var(--cyan);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 48px 7vw 88px;
}

.kicker {
  display: flex;
  gap: 16px;
  font-family: "Share Tech Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  margin-bottom: 18px;
}

.kicker span + span { color: var(--magenta); }

.hero h1,
.panel h2 {
  font-family: Oxanium, "Noto Sans SC", sans-serif;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.hero-line { white-space: nowrap; display: block; }
.hero h1 {
  font-size: clamp(32px, 4.4vw, 58px);
  margin-bottom: 22px;
  text-wrap: balance;
}

.lede {
  max-width: 36em;
  font-size: 18px;
  line-height: 1.9;
  color: #c5d7ea;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
  letter-spacing: 0.12em;
  background: transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn.primary {
  background: linear-gradient(90deg, rgba(100, 240, 255, 0.16), rgba(255, 92, 168, 0.16));
  box-shadow: 0 0 24px rgba(100, 240, 255, 0.12);
}

.btn:hover { transform: translateY(-1px); }

.hero-stage {
  position: relative;
  height: min(72vh, 620px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 18, 32, 0.6), rgba(5, 7, 13, 0.2));
  overflow: hidden;
}

.hero-beauty {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 12%;
  filter: saturate(1.08) contrast(1.05);
}

.hero-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(5, 7, 13, 0.18), transparent 22%, transparent 68%, rgba(5, 7, 13, 0.42)),
    radial-gradient(ellipse at center, transparent 42%, rgba(5, 7, 13, 0.28) 100%);
  pointer-events: none;
}

.orbit {
  position: absolute;
  inset: 8%;
  border: 1px dashed rgba(100, 240, 255, 0.18);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.55;
}

.orbit-b { inset: 20%; border-color: rgba(255, 92, 168, 0.25); animation: spin 18s linear infinite; }
.orbit-c { inset: 28%; animation: spin 26s linear infinite reverse; }
.orbit-a { animation: spin 32s linear infinite; }

.radar {
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background: conic-gradient(from 180deg, transparent, rgba(100, 240, 255, 0.12), transparent 32%);
  animation: spin 7s linear infinite;
  pointer-events: none;
  opacity: 0.4;
}

.hud,
.scan-bar,
.orbit,
.radar {
  z-index: 2;
}

.scan-bar {
  position: absolute;
  left: 18%;
  right: 18%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--magenta), var(--cyan), transparent);
  box-shadow: 0 0 18px var(--cyan);
  animation: scan 3.6s ease-in-out infinite;
}

.hud {
  position: absolute;
  font-family: "Share Tech Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.hud-tl { top: 16px; left: 16px; }
.hud-tr { top: 16px; right: 16px; color: var(--cyan); }
.hud-bl { bottom: 16px; left: 16px; }
.hud-br { bottom: 16px; right: 16px; color: var(--magenta); }

.panel {
  margin: 0 7vw 72px;
  padding: 48px 40px;
  border: 1px solid var(--line);
  background: var(--glass);
}

.panel h2 { font-size: 32px; margin-bottom: 16px; }

.panel h3 {
  font-family: Oxanium, "Noto Sans SC", sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.panel-note {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.feature-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-card {
  border: 1px solid var(--line);
  padding: 22px 20px;
  background: rgba(255, 255, 255, 0.02);
}

.feature-card p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.panel-note {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.mail-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(100, 240, 255, 0.35);
  word-break: break-all;
}

.mail-link:hover {
  color: var(--ink);
  box-shadow: 0 0 12px rgba(100, 240, 255, 0.25);
}

.foot {
  display: flex;
  justify-content: space-between;
  padding: 24px 7vw 40px;
  color: var(--muted);
  font-family: "Share Tech Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
}

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes scan {
  0%, 100% { top: 18%; opacity: 0.3; }
  50% { top: 78%; opacity: 1; }
}

@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    right: 7vw;
    left: 7vw;
    flex-direction: column;
    padding: 12px;
    background: var(--glass);
    border: 1px solid var(--line);
  }
  .nav-links.is-open { display: flex; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 28px; }
  .hero-stage { height: 380px; }
  .panel { padding: 32px 22px; }
  .feature-grid,
  .feature-grid.two { grid-template-columns: 1fr; }
}