:root {
  color-scheme: dark;
  --ink: #eef7f7;
  --muted: #9db1b7;
  --faint: #687d84;
  --surface: #0d1e26;
  --surface-2: #112831;
  --line: rgba(166, 204, 207, 0.16);
  --accent: #55dfc5;
  --accent-2: #9cf3df;
  --deep: #071219;
  --max: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { background: var(--deep); scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 18%, rgba(34, 110, 104, 0.19), transparent 34rem),
    linear-gradient(180deg, #071219 0%, #091820 60%, #071219 100%);
  line-height: 1.6;
}

a { color: inherit; }

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.site-header,
footer {
  width: min(calc(100% - 48px), var(--max));
  margin-inline: auto;
  display: flex;
  align-items: center;
}

.site-header {
  min-height: 84px;
  border-bottom: 1px solid var(--line);
  gap: 44px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border: 1px solid rgba(85, 223, 197, 0.6);
  border-radius: 8px;
  display: grid;
  place-items: center;
  transform: rotate(45deg);
}

.brand-mark span {
  width: 11px;
  height: 11px;
  border: 2px solid var(--accent);
  border-left-color: transparent;
  border-radius: 3px;
}

.site-header nav {
  display: flex;
  gap: 30px;
  margin-left: auto;
}

.site-header nav a,
footer nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.87rem;
}

.site-header nav a:hover,
footer nav a:hover { color: var(--accent-2); }

.header-login {
  border: 1px solid rgba(85, 223, 197, 0.45);
  border-radius: 8px;
  padding: 9px 16px;
  color: var(--accent-2);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
}

main { overflow: hidden; }

.hero {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  min-height: 690px;
  padding: 105px 0 90px;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 80px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 { margin: 0; line-height: 1.06; letter-spacing: -0.045em; }

h1 { font-size: clamp(3.2rem, 6vw, 5.65rem); font-weight: 650; }
h1 span { color: var(--accent-2); }
h2 { font-size: clamp(2rem, 3vw, 3rem); font-weight: 620; }

.lede {
  max-width: 650px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 750;
}

.button-primary { background: var(--accent); color: #05211e; }
.button-primary:hover { background: var(--accent-2); }
.button-secondary { border: 1px solid var(--line); color: var(--ink); background: rgba(255,255,255,0.02); }
.button-secondary:hover { border-color: rgba(85, 223, 197, 0.4); }

.access-note { margin: 22px 0 0; color: var(--faint); font-size: 0.78rem; }
.access-note span { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(85,223,197,.1); }

.system-card {
  position: relative;
  background: linear-gradient(145deg, rgba(20, 49, 59, 0.92), rgba(9, 27, 34, 0.94));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.34);
}

.system-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(85,223,197,.28), transparent 32%, transparent 70%, rgba(85,223,197,.12));
  pointer-events: none;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  padding: 1px;
}

.card-topline { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 0.72rem; letter-spacing: .1em; text-transform: uppercase; }
.status { display: inline-flex; align-items: center; gap: 7px; color: var(--accent-2); }
.status i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.pack-visual {
  min-height: 285px;
  display: grid;
  place-items: center;
  perspective: 700px;
  position: relative;
}

.pack-shell {
  width: 78%;
  aspect-ratio: 1.55;
  position: relative;
  transform: rotateX(56deg) rotateZ(-22deg);
  border: 2px solid rgba(156, 243, 223, 0.7);
  border-radius: 12px;
  background: rgba(4, 19, 23, 0.82);
  box-shadow: 18px 24px 0 rgba(3, 13, 17, 0.82), 0 0 35px rgba(85,223,197,.08);
  padding: 14px;
}

.module-grid { height: 100%; display: grid; grid-template-columns: repeat(4,1fr); grid-template-rows: repeat(3,1fr); gap: 7px; }
.module-grid span { border: 1px solid rgba(126, 210, 198, 0.28); border-radius: 4px; background: linear-gradient(135deg, rgba(46, 104, 103, 0.55), rgba(12, 37, 44, 0.75)); }
.module-grid span:nth-child(3n + 1) { background: linear-gradient(135deg, rgba(65, 138, 126, .65), rgba(13, 42, 48, .7)); }
.busbar { position: absolute; width: 88%; height: 4px; top: 49%; left: 6%; background: var(--accent); box-shadow: 0 0 10px rgba(85,223,197,.5); }
.axis { position: absolute; color: var(--faint); font: 700 .62rem ui-monospace, monospace; }
.axis-x { bottom: 45px; right: 24px; }
.axis-y { top: 44px; left: 35px; }

.metric-grid { display: grid; grid-template-columns: repeat(2,1fr); margin: 0; border-top: 1px solid var(--line); }
.metric-grid div { padding: 16px 14px 10px; border-bottom: 1px solid var(--line); }
.metric-grid div:nth-child(odd) { border-right: 1px solid var(--line); }
.metric-grid dt { color: var(--faint); font-size: .68rem; text-transform: uppercase; letter-spacing: .12em; }
.metric-grid dd { margin: 4px 0 0; color: var(--ink); font-size: .9rem; }

.scope {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto 90px;
  padding: 72px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 90px;
  align-items: start;
}

.scope > p { margin: 30px 0 0; color: var(--muted); }

footer {
  min-height: 110px;
  gap: 30px;
  color: var(--faint);
  font-size: .8rem;
}

.brand-small { color: var(--ink); font-size: .68rem; }
.brand-small .brand-mark { width: 24px; height: 24px; border-radius: 6px; }
.brand-small .brand-mark span { width: 8px; height: 8px; }
footer p { margin-right: auto; }
footer nav { display: flex; gap: 22px; }

.page-hero {
  width: min(calc(100% - 48px), 900px);
  margin: 0 auto;
  padding: 92px 0 54px;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 { font-size: clamp(2.8rem, 6vw, 4.8rem); }

.page-hero .lede { max-width: 760px; }

.content {
  width: min(calc(100% - 48px), 900px);
  margin: 0 auto;
  padding: 58px 0 96px;
}

.content h2 {
  margin-top: 56px;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  letter-spacing: -0.025em;
}

.content h2:first-child { margin-top: 0; }
.content p,
.content li { color: var(--muted); }
.content ul { padding-left: 1.2rem; }
.content li + li { margin-top: 10px; }

.content-card,
.notice {
  margin: 32px 0;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(17, 40, 49, 0.58);
}

.content-card h2,
.notice h2 { margin-top: 0; font-size: 1.35rem; }
.content-card p:last-child,
.notice p:last-child { margin-bottom: 0; }
.notice { border-left: 3px solid var(--accent); }

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 34px 0;
}

.feature-list article {
  min-height: 150px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.018);
}

.feature-list h2 { margin: 0; font-size: 1.12rem; letter-spacing: -0.01em; }
.feature-list p { margin-bottom: 0; font-size: .92rem; }
.meta-line { margin-top: 30px; color: var(--faint); font-size: .78rem; }

@media (max-width: 900px) {
  .site-header { gap: 20px; }
  .site-header nav { display: none; }
  .header-login { margin-left: auto; }
  .hero { grid-template-columns: 1fr; gap: 58px; padding-top: 78px; }
  .system-card { width: min(100%, 600px); }
  .scope { grid-template-columns: 1fr; gap: 12px; }
}

@media (max-width: 560px) {
  .site-header,
  footer,
  .hero,
  .scope { width: min(calc(100% - 32px), var(--max)); }
  .site-header { min-height: 72px; }
  .header-login { padding: 8px 11px; font-size: .72rem; }
  h1 { font-size: clamp(2.75rem, 14vw, 4rem); }
  .hero { padding-top: 60px; }
  .system-card { padding: 18px; }
  .pack-visual { min-height: 225px; }
  .metric-grid { grid-template-columns: 1fr; }
  .metric-grid div:nth-child(odd) { border-right: 0; }
  footer { align-items: flex-start; flex-wrap: wrap; padding: 28px 0; }
  footer p { width: 100%; margin: 0; }
  .page-hero,
  .content { width: min(calc(100% - 32px), 900px); }
  .page-hero { padding-top: 60px; }
  .feature-list { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}