:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1c2230;
  --muted: #5d6677;
  --line: #e4e1d8;
  --accent: #9a7536;        /* mosiądz – nawiązanie do instrumentów Heweliusza */
  --accent-soft: #f3ecdf;
  --code-bg: #141a26;
  --code-text: #e6e1d3;
  --code-muted: #8d95a6;
  --code-accent: #d8b46a;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e121b;
    --surface: #151b27;
    --text: #e7e4dc;
    --muted: #9ba3b4;
    --line: #262e3d;
    --accent: #d2ad66;
    --accent-soft: #231f17;
    --code-bg: #0a0d14;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* nagłówek */
header.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
header.top .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; }
.brand:hover { text-decoration: none; }
.brand span { font-family: var(--serif); font-size: 1.25rem; letter-spacing: .01em; }
nav { margin-left: auto; display: flex; gap: 22px; font-size: .93rem; }
nav a { color: var(--muted); }
nav a:hover { color: var(--text); text-decoration: none; }

/* hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero .sky { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; pointer-events: none; }
.hero .wrap > *, .steps > * { min-width: 0; }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; padding-top: 72px; padding-bottom: 72px; align-items: center; }
.status {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .82rem; color: var(--accent); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 20px;
}
.status::before { content: "✦"; font-size: .75rem; }
h1 {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(2.2rem, 4.2vw, 3.3rem); line-height: 1.12; margin: 0 0 18px;
  letter-spacing: -.01em;
}
.lead { color: var(--muted); font-size: 1.12rem; margin: 0 0 28px; max-width: 34em; }
.buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 8px; font-weight: 600; font-size: .95rem;
  border: 1px solid var(--line); color: var(--text); background: var(--surface);
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* kod */
.code {
  background: var(--code-bg); color: var(--code-text); border-radius: 12px;
  font: 13.5px/1.6 var(--mono); overflow: hidden;
  box-shadow: 0 18px 40px -20px rgba(0,0,0,.45);
}
.code .bar { display: flex; gap: 6px; padding: 12px 16px; border-bottom: 1px solid #222a39; color: var(--code-muted); font-size: 12px; }
.code .bar i { width: 10px; height: 10px; border-radius: 50%; background: #2a3243; display: inline-block; }
.code .bar b { margin-left: 8px; font-weight: 400; }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; }
.code .c { color: var(--code-muted); }
.code .k { color: var(--code-accent); }
.code .s { color: #a9c7a0; }
.code .out { border-top: 1px dashed #2a3243; color: #cfd6e4; }

/* sekcje */
section { padding: 80px 0; border-bottom: 1px solid var(--line); }
.eyebrow { font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
h2 { font-family: var(--serif); font-weight: 500; font-size: clamp(1.7rem, 3vw, 2.2rem); margin: 0 0 14px; line-height: 1.2; }
.intro { color: var(--muted); max-width: 46em; margin: 0 0 40px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: .94rem; }
.card .glyph { font-family: var(--serif); color: var(--accent); font-size: 1.3rem; margin-bottom: 6px; display: block; }

table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-size: .95rem; }
th, td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; background: var(--accent-soft); }
tr:last-child td { border-bottom: 0; }
td.num { font-family: var(--mono); white-space: nowrap; color: var(--text); }
.note { color: var(--muted); font-size: .9rem; margin-top: 16px; }

.steps { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.steps ol { margin: 0; padding-left: 20px; color: var(--muted); }
.steps li { margin-bottom: 12px; }
.steps li strong { color: var(--text); }
code.inline { font-family: var(--mono); font-size: .88em; background: var(--accent-soft); padding: 1px 6px; border-radius: 5px; color: var(--text); }

.sources { columns: 2; column-gap: 40px; padding: 0; margin: 0; list-style: none; }
.sources li { break-inside: avoid; margin: 0 0 18px; padding-left: 18px; position: relative; color: var(--muted); font-size: .94rem; }
.sources li::before { content: "✦"; position: absolute; left: 0; color: var(--accent); font-size: .7rem; top: .35em; }
.sources li strong { color: var(--text); display: block; }

.pro { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.pro .panel { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 26px; }
.pro .panel ul { margin: 0; padding-left: 18px; color: var(--muted); }
.pro .panel li { margin-bottom: 8px; }

.patron { display: grid; grid-template-columns: 120px 1fr; gap: 28px; align-items: center; }
.patron svg { width: 120px; height: 120px; }
.patron p { color: var(--muted); margin: 0; max-width: 44em; }

footer { padding: 36px 0 48px; color: var(--muted); font-size: .88rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: space-between; }

@media (max-width: 860px) {
  .hero .wrap, .steps, .pro, .patron { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
  .sources { columns: 1; }
  /* Na telefonie menu w drugim wierszu, przewijane w poziomie. */
  header.top .wrap { flex-wrap: wrap; height: auto; padding-top: 10px; gap: 6px 24px; }
  nav { margin-left: 0; width: 100%; overflow-x: auto; white-space: nowrap; gap: 18px; padding-bottom: 10px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  nav::-webkit-scrollbar { display: none; }
  nav a { flex: none; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  section { padding: 56px 0; }
}

/* --- dokumentacja --- */
.doc { display: grid; grid-template-columns: 220px 1fr; gap: 48px; padding-top: 48px; padding-bottom: 80px; }
.doc aside { position: sticky; top: 84px; align-self: start; font-size: .92rem; }
.doc aside p { margin: 18px 0 6px; font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.doc aside a { display: block; color: var(--muted); padding: 3px 0; }
.doc aside a:hover { color: var(--text); text-decoration: none; }
.doc article { min-width: 0; max-width: 760px; }
.doc article h1 { font-size: clamp(2rem, 3.4vw, 2.6rem); }
.doc article h2 { margin-top: 56px; padding-top: 8px; border-top: 1px solid var(--line); }
.doc article h3 { margin: 30px 0 8px; font-size: 1.1rem; }
.doc article p, .doc article li { color: var(--muted); }
.doc article strong { color: var(--text); }
.doc article .code { margin: 16px 0 24px; box-shadow: none; }
.doc article table { margin: 16px 0 24px; }
.doc .callout { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 12px 16px; border-radius: 0 8px 8px 0; color: var(--text); font-size: .94rem; margin: 18px 0; }
@media (max-width: 860px) { .doc { grid-template-columns: 1fr; } .doc aside { position: static; } }