:root {
  --bg: #ffffff;
  --bg-alt: #f3f5f8;
  --text: #1c2430;
  --muted: #5a6575;
  --accent: #2f6fae;
  --accent-text: #ffffff;
  --border: #d9dee6;
  --code-bg: #10161f;
  --code-text: #e3e8ef;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b;
    --bg-alt: #161d27;
    --text: #e3e8ef;
    --muted: #9aa5b4;
    --accent: #6aa8e6;
    --accent-text: #0f141b;
    --border: #2a3442;
    --code-bg: #0a0e14;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; border-radius: 6px; }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

.top { border-bottom: 1px solid var(--border); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px;
       min-height: 56px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--text); }

.hero { padding: 56px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); line-height: 1.1; margin: 0 0 16px; }
h2 { font-size: 1.7rem; margin: 48px 0 20px; }
h3 { margin: 0 0 6px; font-size: 1.1rem; }
.lead { color: var(--muted); font-size: 1.1rem; }
.meta { color: var(--muted); font-size: 0.9rem; }
figure { margin: 0; }
.hero-img img { box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18); }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 24px 0 12px; }
.btn { display: inline-block; padding: 9px 18px; border: 1px solid var(--border);
       border-radius: 6px; color: var(--text); text-decoration: none; font-weight: 600; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cards article { border: 1px solid var(--border); border-radius: 8px; padding: 18px; }
.cards p { margin: 0; color: var(--muted); }

.gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 40px; }
.gallery .wide { grid-column: span 2; }
figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 8px; }

.band { background: var(--bg-alt); margin-top: 56px; padding: 8px 0 40px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
pre { background: var(--code-bg); color: var(--code-text); padding: 18px; border-radius: 8px;
      overflow-x: auto; margin: 0; }

.steps { padding-left: 22px; }
.steps li { margin-bottom: 10px; }

.foot { border-top: 1px solid var(--border); margin-top: 56px; padding: 24px 0;
        color: var(--muted); font-size: 0.9rem; }

@media (max-width: 820px) {
  .hero-grid, .two, .cards, .gallery { grid-template-columns: 1fr; }
  .gallery .wide { grid-column: auto; }
  .hero { padding-top: 32px; }
}