:root {
  --text: rgb(31, 41, 55);
  --text-dim: rgb(107, 114, 128);
  --accent: rgb(47, 107, 230);
  --accent-soft: rgb(226, 235, 252);
  --panel: rgb(255, 255, 255);
  --bg: rgb(240, 243, 249);
  --border: rgb(217, 223, 234);
  --grid: rgb(232, 236, 244);
  --grid-major: rgb(210, 217, 230);
  --canvas: rgb(251, 252, 254);
  --good: rgb(22, 150, 90);
  --bad: rgb(205, 55, 55);
  --warn: rgb(214, 130, 20);

  --r-lg: 16px;
  --r-md: 10px;
  --r-sm: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(47,107,230,0.08), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(90,60,220,0.07), transparent 55%),
    var(--bg);
  line-height: 1.5;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
header.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(240, 243, 249, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.brand img { width: 32px; height: 32px; border-radius: 8px; }

.nav-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14.5px;
  color: var(--text-dim);
}

.nav-links a:hover { color: var(--text); }

.nav-main-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid rgba(47,107,230,0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.nav-main-link svg { width: 16px; height: 16px; }

.nav-main-link:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(47,107,230,0.3);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.05);
  box-shadow: 0 6px 16px rgba(47,107,230,0.28);
}

.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  padding: 84px 0 60px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(34px, 5.5vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  font-weight: 800;
}

.hero h1 span { color: var(--accent); }

.hero p.lead {
  max-width: 620px;
  margin: 0 auto 36px;
  font-size: 18px;
  color: var(--text-dim);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 30px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 17px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:active { transform: translateY(1px) scale(0.99); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 28px rgba(47,107,230,0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary:hover { box-shadow: 0 14px 34px rgba(47,107,230,0.42); }

.btn-primary svg { width: 20px; height: 20px; }

.btn-secondary {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--accent-soft); border-color: var(--accent); }

.hero-note {
  font-size: 13px;
  color: var(--text-dim);
}

.hero-shot {
  margin: 56px auto 0;
  max-width: 980px;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 30px 70px -20px rgba(30, 40, 70, 0.28), 0 2px 8px rgba(30,40,70,0.06);
  overflow: hidden;
  background: var(--panel);
}

.hero-shot img { width: 100%; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 46px;
}

.section-tag {
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(26px, 3.6vw, 36px);
  margin: 0 0 14px;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.section-head p {
  color: var(--text-dim);
  font-size: 16.5px;
  margin: 0;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-grid p {
  color: var(--text-dim);
  font-size: 16px;
  margin: 0 0 16px;
}

.about-grid strong { color: var(--text); }

.stat-row {
  display: flex;
  gap: 28px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.stat b {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: var(--accent);
}

.stat span {
  font-size: 13.5px;
  color: var(--text-dim);
}

.about-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  box-shadow: 0 18px 40px -16px rgba(30,40,70,0.18);
}

.about-card img {
  border-radius: var(--r-md);
  border: 1px solid var(--grid-major);
}

/* ---------- Features grid (labs) ---------- */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.lab-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.lab-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px -14px rgba(30,40,70,0.22);
  border-color: var(--accent);
}

.lab-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
  background: var(--accent-soft);
  color: var(--accent);
}

.lab-card h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
}

.lab-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

/* ---------- Showcase / screenshots ---------- */
.showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, auto);
  gap: 22px;
}

.shot-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 14px 30px -16px rgba(30,40,70,0.2);
}

.shot-card img { border-bottom: 1px solid var(--border); }

.shot-cap {
  padding: 16px 20px;
}

.shot-cap h4 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
}

.shot-cap p {
  margin: 0;
  font-size: 13.5px;
  color: var(--text-dim);
}

/* ---------- Open source band ---------- */
.oss {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  box-shadow: 0 20px 50px -20px rgba(30,40,70,0.2);
}

.oss h2 {
  font-size: 26px;
  margin: 0 0 10px;
  font-weight: 800;
}

.oss p {
  margin: 0;
  color: var(--text-dim);
  max-width: 520px;
}

.oss-badges {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.badge {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 999px;
}

/* ---------- Download section ---------- */
.download {
  text-align: center;
}

.download-box {
  background: linear-gradient(180deg, var(--panel), var(--accent-soft));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 56px 32px;
  box-shadow: 0 24px 60px -24px rgba(47,107,230,0.35);
}

.download-box h2 {
  font-size: clamp(24px, 3.4vw, 32px);
  margin: 0 0 14px;
  font-weight: 800;
}

.download-box p {
  color: var(--text-dim);
  margin: 0 0 30px;
  font-size: 16px;
}

.platform-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.platform-row span {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 48px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.footer-brand img { width: 24px; height: 24px; border-radius: 6px; }

footer .fine {
  font-size: 13px;
  color: var(--text-dim);
}

footer .links {
  display: flex;
  gap: 20px;
  font-size: 13.5px;
  color: var(--text-dim);
}

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .lab-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase { grid-template-columns: 1fr; }
  .oss { grid-template-columns: 1fr; text-align: center; }
  .oss p { margin: 0 auto; }
}

@media (max-width: 620px) {
  .nav-links { display: none; }
  .nav-main-link span, .nav-main-link { font-size: 13px; padding: 8px 12px; }
  .nav-cta { font-size: 13px; padding: 8px 14px; }
  .stat-row { gap: 10px 24px; }
  .stat { flex: 1 1 28%; }
  .brand span.full { display: none; }
  .lab-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 56px 0 40px; }
  .btn { width: 100%; justify-content: center; }
  .hero-actions { flex-direction: column; }
  section { padding: 52px 0; }
  .oss { padding: 32px 22px; }
  .download-box { padding: 40px 20px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 420px) {
  .lab-grid { grid-template-columns: 1fr; }
}

/* ---------- 404 ---------- */
.notfound { padding: 90px 0 140px; display: flex; justify-content: center; }

.notfound-card {
  max-width: 560px;
  width: 100%;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 64px 48px;
  box-shadow: 0 20px 44px -24px rgba(31,41,55,0.18);
}

.notfound-tag {
  font-weight: 800;
  font-size: 72px;
  margin: 0 0 8px;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.notfound-card h1 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
}

.notfound-card p {
  color: var(--text-dim);
  font-size: 16px;
  max-width: 44ch;
  margin: 0 auto 22px;
}

.notfound-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.notfound-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}

.notfound-link-dim {
  font-weight: 600;
  color: var(--text-dim);
}

@media (max-width: 560px) {
  .notfound-card { padding: 44px 26px; }
  .notfound-tag { font-size: 56px; }
}