/* ── Design tokens ──────────────────────────────────────────
   Minimal palette: one ink, a few grays, a single accent. No
   gradients; depth comes from 1px borders and generous space. */
:root {
  --ink: #e7eaee;       /* primary text */
  --ink-soft: #aab2bd;  /* secondary text */
  --muted: #7c828c;     /* tertiary text */
  --line: #24282e;      /* hairline borders */
  --bg: #0d0f12;        /* page background */
  --bg-soft: #15181d;   /* cards / panels */
  --elevated: #1b1f25;  /* hover surface */
  --accent: #22d3ee;    /* cyan accent (buttons, highlights) */
  --accent-ink: #5fdcf0;/* accent text on dark (links, eyebrow) */
  --on-accent: #062028; /* text/icons on top of the accent color */
  --radius: 12px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

::selection { background: rgba(34, 211, 238, 0.25); }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.125rem); font-weight: 700; }
h3 { font-size: 1.0625rem; font-weight: 650; }
p { margin: 0; }

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

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 650;
  color: var(--accent-ink);
  margin-bottom: 14px;
}

/* ── Header ───────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 15, 18, 0.8);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.0625rem;
}
.brand-mark { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--ink-soft); font-size: 0.9375rem; font-weight: 500; }
.nav a:hover { color: var(--ink); }
.nav .nav-cta {
  color: var(--accent-ink);
  font-weight: 600;
}
.nav .nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav .nav-github svg { display: block; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.mobile-nav {
  display: none; /* shown only when toggled open (hidden attr removed) on mobile */
  flex-direction: column;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.mobile-nav:not([hidden]) { display: flex; }
.mobile-nav a {
  padding: 14px 24px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-weight: 500;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn small { font-weight: 500; opacity: 0.7; font-size: 0.75rem; }
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover { background: #3ad9f0; }
.btn-primary small { opacity: 0.85; }
.btn-secondary {
  background: var(--bg-soft);
  color: var(--ink);
  border-color: var(--line);
}
.btn-secondary:hover { border-color: #343a42; background: var(--elevated); }
.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: #343a42; color: var(--ink); background: var(--bg-soft); }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding-top: 88px;
  padding-bottom: 88px;
}
.lede {
  font-size: 1.125rem;
  color: var(--ink-soft);
  margin-top: 18px;
  max-width: 30em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.hero-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.875rem;
}
.hero-note a {
  color: var(--accent-ink);
  font-weight: 600;
  white-space: nowrap;
}
.hero-note a:hover { text-decoration: underline; }

/* Hero illustration — flat, monochrome with one accent line. */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.device .screen {
  border: 1.5px solid var(--line);
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.device .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.device .bar {
  height: 8px;
  border-radius: 4px;
  background: #2b3138;
}
.device .bar.short { width: 55%; }
.laptop .screen { width: 230px; height: 150px; }
.laptop .base {
  height: 10px;
  width: 270px;
  margin: 6px 0 0 -20px;
  background: #2b3138;
  border-radius: 0 0 8px 8px;
}
.phone .screen { width: 92px; height: 175px; border-radius: 16px; }
.phone .bar { height: 6px; }

.link {
  display: flex;
  gap: 6px;
  align-items: center;
  margin: 0 4px;
}
.link span {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.35;
  animation: flow 1.4s infinite ease-in-out;
}
.link span:nth-child(2) { animation-delay: 0.2s; }
.link span:nth-child(3) { animation-delay: 0.4s; }
@keyframes flow {
  0%, 100% { opacity: 0.25; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1); }
}

/* ── Quick facts ──────────────────────────────────────────── */
.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 28px;
  padding-bottom: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.fact { display: flex; flex-direction: column; }
.fact strong { font-size: 1.0625rem; font-weight: 700; }
.fact span { color: var(--muted); font-size: 0.875rem; }

/* ── Sections ─────────────────────────────────────────────── */
.section { padding-top: 80px; padding-bottom: 80px; }
.section-head { max-width: 36em; margin-bottom: 44px; }
.section-head h2 { margin-bottom: 12px; }
.section-head p { color: var(--ink-soft); font-size: 1.0625rem; }

/* ── Feature grid ─────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--bg);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: #343a42; transform: translateY(-2px); }
.card-icon {
  width: 42px; height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--accent-ink);
  margin-bottom: 16px;
}
.card h3 { margin-bottom: 8px; }
.card p { color: var(--ink-soft); font-size: 0.9375rem; }

/* ── Performance ──────────────────────────────────────────── */
.perf {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 44px;
  background: var(--bg-soft);
}
.perf-copy h2 { margin-bottom: 14px; }
.perf-copy > p { color: var(--ink-soft); }
.perf-points {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.perf-points li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-soft);
  font-size: 0.9375rem;
}
.perf-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}
.perf-stats {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.stat {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.stat-num {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  min-width: 64px;
}
.stat-label { color: var(--muted); font-size: 0.875rem; }

/* ── Steps ────────────────────────────────────────────────── */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.step-num {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 16px;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--ink-soft); font-size: 0.9375rem; }

/* ── Download ─────────────────────────────────────────────── */
.download-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 56px 40px;
  text-align: center;
  background: var(--bg-soft);
}
.download-card h2 { margin-bottom: 10px; }
.download-card > p { color: var(--ink-soft); font-size: 1.0625rem; }
.download-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 22px;
}
.download-actions .btn { padding: 14px 24px; }
.req { color: var(--muted); font-size: 0.875rem; }
.download-more { margin-top: 14px; font-size: 0.9375rem; }
.download-more a { color: var(--accent-ink); text-decoration: none; }
.download-more a:hover { text-decoration: underline; }
.download-releases { margin-top: 20px; }

/* ── Download page ────────────────────────────────────────── */
.dl-head {
  padding-top: 72px;
  padding-bottom: 20px;
  max-width: 760px;
}
.dl-head h1 { font-size: 2.5rem; margin: 6px 0 14px; }
.version-chip {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--ink-soft);
  font-size: 0.8125rem;
  font-weight: 600;
}
.dl-head-actions { margin-top: 22px; }
.dl-head-actions .btn { padding: 11px 20px; }
.dl-platform {
  padding-top: 28px;
  padding-bottom: 4px;
}
.dl-platform-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
  color: var(--ink);
}
.dl-platform-head h2 { font-size: 1.375rem; margin: 0; }
.dl-platform-head .dl-req {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.8125rem;
}
.dl-list { display: grid; gap: 14px; }
.dl-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  padding: 22px 24px;
  transition: border-color 0.2s ease;
}
.dl-item:hover { border-color: #343a42; }
.dl-item-main { flex: 1 1 300px; min-width: 0; }
.dl-item-title { display: flex; align-items: center; gap: 10px; }
.dl-item-title h3 { font-size: 1.0625rem; margin: 0; }
.badge {
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.dl-item-desc {
  color: var(--ink-soft);
  font-size: 0.9375rem;
  margin: 8px 0 12px;
  max-width: 52ch;
}
.dl-file {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.875rem;
}
.dl-file code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color: var(--ink-soft);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 0.8125rem;
  word-break: break-all;
}
.dl-size { color: var(--muted); }
.dl-item-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  flex: 0 0 auto;
  text-align: center;
}
.dl-item-actions .btn { padding: 11px 28px; justify-content: center; }
.dl-mirror {
  color: var(--muted);
  font-size: 0.8125rem;
  text-decoration: none;
}
.dl-mirror:hover { color: var(--ink-soft); text-decoration: underline; }
.dl-notes {
  padding-top: 32px;
  padding-bottom: 72px;
  max-width: 760px;
}
.dl-notes p { color: var(--ink-soft); font-size: 0.9375rem; }
.dl-notes a { color: var(--accent-ink); text-decoration: none; }
.dl-notes a:hover { text-decoration: underline; }

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}
.footer-note { color: var(--ink-soft); font-size: 0.9375rem; }
.footer-links { margin: 4px 0 2px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-soft);
  font-size: 0.9375rem;
  font-weight: 500;
}
.footer-links a:hover { color: var(--ink); }
.copyright { color: var(--muted); font-size: 0.8125rem; }

/* ── Reveal-on-scroll (subtle) ────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.in { opacity: 1; transform: none; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 56px; padding-bottom: 56px; }
  .hero-visual { order: -1; margin-bottom: 8px; }
  .grid, .steps { grid-template-columns: 1fr 1fr; }
  .facts { grid-template-columns: 1fr 1fr; gap: 22px 16px; }
  .perf { grid-template-columns: 1fr; padding: 32px; gap: 32px; }
}

@media (max-width: 560px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .grid, .steps, .facts { grid-template-columns: 1fr; }
  .section { padding-top: 56px; padding-bottom: 56px; }
  .hero h1 { font-size: 2rem; }
  .download-card { padding: 40px 22px; }
  .btn { width: 100%; justify-content: center; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .dl-head h1 { font-size: 2rem; }
  .dl-item { flex-direction: column; align-items: stretch; }
  .dl-item-actions { width: 100%; }
  .dl-platform-head { flex-wrap: wrap; }
  .dl-platform-head .dl-req { margin-left: 0; flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .link span { animation: none; opacity: 0.6; }
}