:root {
  --bg: #0c0e11;
  --bg-raised: #14171c;
  --bg-panel: #1a1e25;
  --line: rgba(236, 242, 236, 0.1);
  --line-strong: rgba(236, 242, 236, 0.18);
  --ink: #f4f6f3;
  --muted: #a9b3ab;
  --faint: #7f8a83;
  --mint: #7dffe0;
  --mint-deep: #10382e;
  --blue: #8ebfff;
  --danger: #ff8d7a;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 12px;
  --sans: "Geist", "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Helvetica Neue", sans-serif;
  --mono: "Geist Mono", "Cascadia Mono", "SFMono-Regular", ui-monospace, monospace;
  --max: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background:
    radial-gradient(900px 520px at 8% -10%, rgba(125, 255, 224, 0.09), transparent 58%),
    radial-gradient(760px 420px at 100% 0%, rgba(142, 191, 255, 0.07), transparent 52%),
    var(--bg);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
::selection { background: #1a4a3c; color: #f3fff9; }

.skip {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 20;
  transform: translateY(-160%);
  padding: 8px 12px;
  background: var(--mint);
  color: #06241b;
  border-radius: 8px;
}
.skip:focus { transform: none; }

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: #0c0e11;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.brand-mark { width: auto; height: 36px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
.nav-links a:hover { color: var(--ink); }

.lang {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.lang a {
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-decoration: none;
}
.lang a[aria-current="page"] {
  background: var(--bg-panel);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--ink);
}
.nav-toggle .icon,
.nav-toggle .icon::before,
.nav-toggle .icon::after {
  display: block;
  width: 16px;
  height: 1.5px;
  margin: 0 auto;
  background: currentColor;
  position: relative;
}
.nav-toggle .icon::before,
.nav-toggle .icon::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle .icon::before { top: -5px; }
.nav-toggle .icon::after { top: 5px; }
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero { padding: 72px 0 36px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.kicker {
  margin: 0 0 14px;
  color: var(--mint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.045em;
  font-weight: 650;
  text-wrap: balance;
}

.lede {
  max-width: 38rem;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 10px;
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}
.btn-primary { background: var(--mint); color: #06241b; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}
.btn-ghost:hover { border-color: var(--mint); }
.btn:focus-visible,
.nav-links a:focus-visible,
.lang a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}
.metrics li {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.metrics strong {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.03em;
}
.metrics span {
  color: var(--faint);
  font-size: 13px;
}

.device {
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: linear-gradient(180deg, #171b21, #101318);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.device-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
}
.dots { display: flex; gap: 6px; }
.dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #2a3038;
}
.dots i:first-child { background: #6d3b36; }
.device-title { color: var(--ink); }
.device-meta { margin-left: auto; color: var(--mint); }
.device-body { display: grid; grid-template-columns: 148px 1fr; min-height: 360px; }
.rail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 10px;
  border-right: 1px solid var(--line);
}
.rail span {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
}
.rail .is-active {
  background: #1c2824;
  color: var(--mint);
}
.thread { padding: 18px 16px 20px; }
.thread-label {
  margin: 0 0 14px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.bubble {
  margin: 0 0 10px;
  padding: 12px 12px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
}
.bubble.user {
  background: #222831;
  color: var(--ink);
}
.bubble.agent {
  border: 1px solid var(--line);
  background: #12161b;
  color: var(--muted);
}
.openui {
  margin-top: 12px;
  padding: 10px;
  border-radius: 8px;
  background: #0d1412;
  border: 1px solid rgba(125, 255, 224, 0.2);
}
.openui em {
  display: block;
  margin-bottom: 8px;
  color: var(--mint);
  font-family: var(--mono);
  font-size: 10px;
  font-style: normal;
  letter-spacing: 0.12em;
}
.bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 64px;
}
.bars i {
  flex: 1;
  display: block;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--mint), #1d6d58);
}
.bars i:nth-child(2) { background: linear-gradient(180deg, var(--blue), #24507a); }
.bars i:nth-child(4) { background: linear-gradient(180deg, #d7ffe7, #3d8f74); }

.band {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.band-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.band-row span::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--mint);
  transform: translateY(-1px);
}

section { padding: 84px 0; scroll-margin-top: 84px; }
.section-head {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  margin-bottom: 32px;
}
.index {
  margin: 6px 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}
h2 {
  margin: 0;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.035em;
}
.section-head p { margin: 12px 0 0; max-width: 40rem; color: var(--muted); }

.grid-3, .grid-2 { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: 1.1fr 0.9fr; }

.card, .download-card, details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(20, 23, 28, 0.72);
}
.card { padding: 20px; }
.card h3, .download-card h3 {
  margin: 10px 0 8px;
  font-size: 18px;
  letter-spacing: -0.03em;
}
.card p, .download-card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .tag {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.split { align-items: start; }
.panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
}
.panel h3 { margin: 0 0 8px; letter-spacing: -0.03em; }
.panel p { margin: 0; color: var(--muted); }
.path {
  margin-top: 16px;
  padding: 14px;
  overflow: auto;
  border-radius: 10px;
  background: #0d1014;
  color: #d5e7df;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; padding: 0; list-style: none; }
.chips li {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: #12161b;
  font-size: 13px;
}

.download-card { display: flex; flex-direction: column; gap: 8px; padding: 20px; }
.download-solo {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 28px;
}
.download-card.download-solo .btn { flex: 0 0 auto; margin-top: 0; min-width: 220px; }
.download-card .os {
  color: var(--mint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.file {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
}
.download-card .btn { margin-top: auto; }
.pending {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.pending[hidden] { display: none; }

.faq { display: grid; gap: 10px; }
details { padding: 4px 18px; }
summary {
  cursor: pointer;
  padding: 14px 0;
  font-weight: 600;
  letter-spacing: -0.02em;
}
summary::-webkit-details-marker { display: none; }
details p { margin: 0 0 16px; color: var(--muted); }
details a { color: var(--mint); }

.site-footer {
  padding: 36px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 13px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.site-footer a { color: var(--muted); }
.site-footer strong { color: var(--ink); font-weight: 600; }
.site-footer p { margin: 8px 0 0; }
.legal { margin-top: 28px; }

@media (max-width: 980px) {
  .hero-grid, .grid-3, .grid-2, .footer-grid, .section-head {
    grid-template-columns: 1fr;
  }
  .section-head { gap: 8px; }
  .device-body { grid-template-columns: 118px 1fr; }
}

@media (max-width: 760px) {
  .wrap { width: min(var(--max), calc(100% - 28px)); }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 20;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 8px 20px 18px;
    border-bottom: 1px solid var(--line);
    background: #0c0e11;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { color: var(--ink); }
  .lang { margin-left: 0; }
  .hero { padding-top: 40px; }
  .download-solo { flex-direction: column; align-items: stretch; }
  .download-card.download-solo .btn { width: 100%; }
  .metrics { grid-template-columns: 1fr; }
  .device-body { grid-template-columns: 1fr; }
  .rail { flex-direction: row; overflow: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  section { padding: 56px 0; }
}

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