:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #1d2025;
  --ink-soft: #5b616b;
  --line: #e3e3de;
  --accent: #1f9d55;
  --accent-ink: #ffffff;
  --accent-soft: #e6f4ec;
  --code-bg: #eeeeea;
  --shadow: 0 24px 60px -24px rgba(20, 22, 28, 0.35);
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, "JetBrains Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --surface: #181b21;
    --ink: #e8eaed;
    --ink-soft: #9aa1ab;
    --line: #2a2e36;
    --accent: #7ee787;
    --accent-ink: #0d1a10;
    --accent-soft: #1b2a1f;
    --code-bg: #20242b;
    --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding-inline: 24px;
}

/* Header */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font: 600 18px/1 var(--mono);
  text-decoration: none;
}
.brand img { width: 28px; height: 28px; }
.top nav { display: flex; align-items: center; gap: 20px; font-size: 14px; }
.top nav a { color: var(--ink-soft); text-decoration: none; }
.top nav a:hover { color: var(--ink); }
.top nav .lang { border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; }

/* Hero */
.hero {
  text-align: center;
  padding-block: 56px 32px;
}
.hero .badge {
  display: inline-block;
  font: 500 13px/1 var(--mono);
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 7px 12px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 auto 18px;
  max-width: 16ch;
}
.hero p.lead {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--ink-soft);
  max-width: 40em;
  margin: 0 auto 30px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--surface);
}
.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
}
.btn:hover { filter: brightness(1.05); }
.btn svg { width: 18px; height: 18px; }
.fineprint {
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* Demo */
.demo {
  margin: 28px auto 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: var(--surface);
  max-width: 100%;
}
.demo img { display: block; width: 100%; height: auto; }

/* Sections */
section { padding-block: 64px; }
section h2 {
  font-size: clamp(26px, 3.6vw, 34px);
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}
section p.sub { color: var(--ink-soft); margin: 0 0 32px; max-width: 46em; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.card h3 { font-size: 16px; margin: 0 0 6px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 15px; }
.card kbd { margin-left: 4px; }

kbd, code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--code-bg);
  border-radius: 6px;
  padding: 1px 6px;
}

.shot { margin-top: 32px; }
.shot picture img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.shot figcaption { text-align: center; color: var(--ink-soft); font-size: 14px; margin-top: 12px; }

/* Install */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 16px 18px 16px 58px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 15px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font: 600 13px/1 var(--mono);
  color: var(--accent-ink);
  background: var(--accent);
}
pre {
  font: 14px/1.5 var(--mono);
  background: var(--code-bg);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 10px 0 0;
}

.principles { columns: 2 280px; column-gap: 32px; padding-left: 1.1em; margin: 0; }
.principles li { break-inside: avoid; margin-bottom: 10px; color: var(--ink-soft); }
.principles strong { color: var(--ink); }

/* Footer */
footer {
  border-top: 1px solid var(--line);
  padding-block: 28px 40px;
  font-size: 13px;
  color: var(--ink-soft);
}
footer .row { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
footer a { color: var(--ink-soft); }
footer p { margin: 10px 0 0; }

@media (max-width: 560px) {
  .top nav a:not(.lang) { display: none; }
  section { padding-block: 44px; }
}