:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --surface-2: #f3f1ee;
  --text: #1b1a1f;
  --muted: #5b5866;
  --border: #e3e0dc;
  --accent: #0a7d3b;
  --accent-2: #0b6b8a;
  --accent-ink: #ffffff;
  --code-bg: #f1eff5;
  --warn-bg: #fff5e6;
  --warn-border: #e8a33a;
  --ok: #1e7d45;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0f17;
    --surface: #111a26;
    --surface-2: #16212f;
    --text: #eef3f8;
    --muted: #9fb0c2;
    --border: #2b3d52;
    --accent: #3dff7a;
    --accent-2: #6aa1ff;
    --accent-ink: #061020;
    --code-bg: #121c28;
    --warn-bg: #261c0c;
    --warn-border: #c9862a;
    --ok: #5fd48f;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0f17;
  --surface: #111a26;
  --surface-2: #16212f;
  --text: #eef3f8;
  --muted: #9fb0c2;
  --border: #2b3d52;
  --accent: #3dff7a;
  --accent-2: #6aa1ff;
  --accent-ink: #061020;
  --code-bg: #121c28;
  --warn-bg: #261c0c;
  --warn-border: #c9862a;
  --ok: #5fd48f;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent-2); text-underline-offset: 2px; }
a:hover { color: var(--accent); }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }

header.hero { padding: 2.5rem 0 1.5rem; border-bottom: 1px solid var(--border); }
.hero img {
  display: block; width: 100%; height: auto; border-radius: 14px;
  border: 1px solid var(--border); margin-bottom: 1.75rem;
}
.eyebrow {
  font-size: .8rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 .5rem;
}
h1 { font-size: clamp(1.9rem, 5vw, 2.7rem); line-height: 1.15; margin: 0 0 1rem; letter-spacing: -.01em; }
h2 { font-size: 1.6rem; line-height: 1.25; margin: 3rem 0 .75rem; padding-top: .5rem; }
h3 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
p, ul, ol { margin: 0 0 1rem; }
li { margin: .3rem 0; }
.lede { font-size: 1.15rem; color: var(--text); }

.cta { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.5rem 0 1rem; }
.btn {
  display: inline-block; padding: .65rem 1.1rem; border-radius: 9px;
  font-weight: 600; text-decoration: none; border: 1px solid var(--border);
  color: var(--text); background: var(--surface);
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn:hover { filter: brightness(1.08); color: inherit; }
.btn.primary:hover { color: var(--accent-ink); }

.facts { display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; list-style: none; margin: 1rem 0 0; }
.facts li {
  margin: 0; font-size: .85rem; padding: .25rem .65rem; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
}

nav.toc {
  margin: 2rem 0 0; padding: 1rem 1.25rem; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
}
nav.toc h2 { font-size: 1rem; margin: 0 0 .5rem; padding: 0; }
nav.toc ol { columns: 2; column-gap: 2rem; margin: 0; padding-left: 1.2rem; font-size: .95rem; }
@media (max-width: 600px) { nav.toc ol { columns: 1; } }

.note {
  border-left: 4px solid var(--warn-border); background: var(--warn-bg);
  padding: .9rem 1.1rem; border-radius: 0 10px 10px 0; margin: 1.25rem 0;
}
.note p:last-child { margin-bottom: 0; }

pre, code { font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace; }
code { font-size: .88em; background: var(--code-bg); padding: .1em .35em; border-radius: 5px; }
.codeblock { position: relative; margin: 1rem 0 1.25rem; }
pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem 1.1rem; overflow-x: auto; font-size: .87rem; line-height: 1.55; margin: 0;
}
pre code { background: none; padding: 0; font-size: inherit; }
.copy {
  position: absolute; top: .5rem; right: .5rem; font: 600 .75rem/1 system-ui, sans-serif;
  padding: .4rem .6rem; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface); color: var(--muted); cursor: pointer;
}
.copy:hover { color: var(--text); }

.table-scroll { overflow-x: auto; margin: 1rem 0 1.25rem; border: 1px solid var(--border); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; background: var(--surface); }
th, td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

.chain { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin: 1rem 0; font-size: .9rem; }
.chain span {
  padding: .35rem .65rem; border-radius: 7px; background: var(--surface);
  border: 1px solid var(--border); font-family: ui-monospace, Menlo, monospace;
}
.chain span.hot { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.chain i { color: var(--muted); font-style: normal; }

ol.steps { counter-reset: s; list-style: none; padding: 0; }
ol.steps > li {
  counter-increment: s; position: relative; padding: 0 0 0 3rem; margin: 0 0 1.75rem;
}
ol.steps > li::before {
  content: counter(s); position: absolute; left: 0; top: .1rem;
  width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: .95rem;
}
ol.steps > li > h3 { margin-top: 0; }

figure { margin: 1.5rem 0; }
figure img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--border); display: block; margin: 0 auto; }
figcaption { font-size: .88rem; color: var(--muted); text-align: center; margin-top: .5rem; }

details {
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
  margin: .6rem 0; padding: 0 1rem;
}
details[open] { padding-bottom: .5rem; }
summary { cursor: pointer; font-weight: 600; padding: .85rem 0; list-style-position: outside; }
details p { margin: .25rem 0 .75rem; }

.ok { color: var(--ok); font-weight: 600; }

footer {
  margin-top: 4rem; padding: 2rem 0 3rem; border-top: 1px solid var(--border);
  color: var(--muted); font-size: .9rem;
}
footer p { margin: 0 0 .5rem; }

.sitenav { border-bottom: 1px solid var(--border); background: var(--surface); }
.sitenav .wrap { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; align-items: center; padding-top: .7rem; padding-bottom: .7rem; font-size: .92rem; }
.sitenav .brand { font-weight: 700; color: var(--text); text-decoration: none; margin-right: auto; }
.sitenav a { text-decoration: none; }
.crumbs { font-size: .85rem; color: var(--muted); margin: 1.5rem 0 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin: 1rem 0 1.5rem; }
.card { display: block; padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); text-decoration: none; color: var(--text); }
.card:hover { border-color: var(--accent); color: var(--text); }
.card strong { display: block; margin-bottom: .3rem; color: var(--accent); }
.card span { font-size: .92rem; color: var(--muted); }
.tool { border: 1px solid var(--accent); border-radius: 12px; padding: 1rem 1.2rem; margin: 2rem 0; background: var(--surface); }
.tool p:last-child { margin-bottom: 0; }
small { color: var(--muted); }