:root {
  --bg: #0a0d12;
  --bg-soft: #11151c;
  --bg-card: #161b24;
  --bg-card-hover: #1c2230;
  --border: #232a39;
  --border-soft: #1b2231;
  --text: #e6e9ef;
  --text-dim: #8a93a4;
  --text-mute: #5e6878;
  --accent: #5b8ed9;
  --accent-2: #6fbfa1;
  --accent-3: #b8d4e8;
  --grid-line: rgba(91, 142, 217, 0.04);
  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1180px;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

/* subtle molecular grid background across the entire site */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

main, section, header, footer { position: relative; z-index: 1; }

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--accent-3); text-decoration: none; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(91, 142, 217, 0.06);
}

/* ---------- Nav + Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse 70% 50% at 80% 0%, rgba(91, 142, 217, 0.18), transparent 70%),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(111, 191, 161, 0.10), transparent 70%);
  padding-bottom: 110px;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.2px;
}
.brand a { color: inherit; }

.logo-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
}
.nav-links a {
  margin-left: 28px;
  color: var(--text-dim);
  font-size: 13.5px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }

.hero-grid {
  max-width: var(--maxw);
  margin: 50px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 70px;
  align-items: center;
}

.hero-text h1 {
  font-size: 56px;
  line-height: 1.05;
  letter-spacing: -1.5px;
  margin: 0 0 24px;
  font-weight: 800;
}

.accent {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 18px;
  color: var(--text-dim);
  margin: 0 0 30px;
  max-width: 560px;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14.5px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  cursor: pointer;
  letter-spacing: 0.2px;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(91, 142, 217, 0.35);
}
.btn-primary:hover { background: #6fa0e6; box-shadow: 0 6px 18px rgba(91, 142, 217, 0.45); color: white; }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-3); }

.btn .btn-icon { width: 16px; height: 16px; }

.hero-meta {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  font-family: var(--mono);
  font-size: 11px;
  padding: 4px 10px;
  background: var(--bg-soft);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  letter-spacing: 0.05em;
}

/* hero artwork */
.hero-art {
  position: relative;
  padding: 20px;
  display: flex;
  justify-content: center;
}
.hero-art img {
  width: 100%;
  max-width: 460px;
  height: auto;
  /* PNG already contains a transparent background and a round dish; no
     border-radius needed — it would clip the soft outer glow baked into
     the image. */
  filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.55))
          drop-shadow(0 0 80px rgba(91, 142, 217, 0.22));
  animation: float 9s ease-in-out infinite;
}

/* decorative scan ring */
.hero-art::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 520px;
  height: 520px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px dashed rgba(91, 142, 217, 0.18);
  animation: spin 60s linear infinite;
  pointer-events: none;
}
.hero-art::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px dashed rgba(111, 191, 161, 0.10);
  animation: spin 120s linear infinite reverse;
  pointer-events: none;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes spin {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to   { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-art-caption {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 18px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
  font-family: var(--mono);
}
.count { font-size: 22px; font-weight: 700; color: var(--accent-2); }
.count-label { font-size: 12px; color: var(--text-dim); }

/* ---------- Section base ---------- */
.how, .features, .download, .for-labs {
  padding: 110px 0;
  position: relative;
}

.how h2,
.features h2,
.download h2,
.for-labs h2 {
  font-size: 36px;
  margin: 0 0 12px;
  letter-spacing: -0.6px;
  font-weight: 800;
}

.section-lead {
  font-size: 17px;
  color: var(--text-dim);
  margin: 0 0 56px;
  max-width: 620px;
}

/* ---------- How it works ---------- */
.how { background: var(--bg-soft); border-top: 1px solid var(--border); }

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  counter-reset: step;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.step:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0a0d12;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  font-family: var(--mono);
  flex-shrink: 0;
}

.step-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.2px;
}
.step-body p {
  margin: 0;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.55;
}

.step-art {
  width: 100%;
  height: 110px;
  margin-top: auto;
  opacity: 0.9;
}

/* ---------- Features ---------- */
.features { background: var(--bg); border-top: 1px solid var(--border); }
.features h2 { margin-bottom: 14px; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 48px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.card:hover {
  border-color: rgba(91, 142, 217, 0.4);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.card:hover::before { opacity: 1; }

.feat-icon {
  width: 28px;
  height: 28px;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.1px;
}
.card p {
  margin: 0;
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.55;
}

/* ---------- Download ---------- */
.download { background: var(--bg-soft); border-top: 1px solid var(--border); }
.download .lead { font-size: 17px; margin-bottom: 28px; }

.code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  color: #cfd6e3;
  margin: 0 0 24px;
  line-height: 1.7;
  position: relative;
}
.code::before {
  content: "$ shell";
  position: absolute;
  top: 10px;
  right: 16px;
  font-size: 10px;
  color: var(--text-mute);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- For labs ---------- */
.for-labs { background: var(--bg); border-top: 1px solid var(--border); }
.for-labs p { max-width: 720px; color: var(--text-dim); font-size: 16px; }
.for-labs a { color: var(--accent-2); font-weight: 500; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 56px;
  background: var(--bg);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 24px;
}

.footer-row > div:last-child {
  display: flex;
  gap: 24px;
}

.footer-row a {
  color: var(--text-dim);
  font-size: 13.5px;
  margin-right: 0;
}
.footer-row a:hover { color: var(--text); }

.muted { color: var(--text-dim); margin-top: 6px; font-size: 14px; }
.small { font-size: 12px; color: var(--text-mute); }

/* ---------- Language dropdown ---------- */
.lang-dropdown {
  position: relative;
  margin-left: 28px;
  display: inline-block;
}
.lang-dropdown[open] .lang-caret { transform: rotate(180deg); }
.lang-dropdown > summary { list-style: none; }
.lang-dropdown > summary::-webkit-details-marker { display: none; }
.lang-dropdown > summary::marker { content: ""; display: none; }

.lang-current {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  font-size: 12.5px;
  font-weight: 600;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  user-select: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.lang-current:hover { border-color: var(--accent); background: rgba(91, 142, 217, 0.08); }
.lang-dropdown[open] .lang-current { border-color: var(--accent); }

.lang-caret {
  width: 10px;
  height: 6px;
  color: var(--text-dim);
  transition: transform 0.18s ease;
  flex-shrink: 0;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  box-shadow:
    0 12px 30px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(91, 142, 217, 0.08);
  z-index: 100;
  animation: lang-menu-in 0.16s ease-out;
}
@keyframes lang-menu-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 6px;
  color: var(--text) !important;
  font-size: 14px !important;
  margin: 0 !important;
  text-decoration: none !important;
  transition: background 0.12s ease;
}
.lang-option:hover { background: rgba(91, 142, 217, 0.12); }
.lang-label { flex: 1; }
.lang-check { width: 14px; height: 14px; color: var(--accent-2); flex-shrink: 0; }
.lang-active { background: rgba(111, 191, 161, 0.08); }
.lang-active .lang-label { color: var(--accent-2); }

/* ---------- Mobile ---------- */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 30px;
  }
  .hero-text h1 { font-size: 42px; }
  .hero-art img { max-width: 320px; }
  .hero-art::before, .hero-art::after { display: none; }
  .steps { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
  .nav-links a { margin-left: 16px; font-size: 13px; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 34px; }
  .nav-links a { margin-left: 12px; }
  .nav-links a:not(.lang-current):not(.lang-option) { display: none; }
  .lang-dropdown { margin-left: 0; }
}