:root {
  --bg: #ffffff; --fg: #1d2333; --muted: #5a6275; --accent: #232b65; --accent2: #0f7c7a;
  --panel: #f3f5f9; --line: #dde2ea; --code: #f4f6f9; --ok: #2f7d32;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12151d; --fg: #e6e9f0; --muted: #a3abbd; --accent: #9fb0ff; --accent2: #5cc8c4;
    --panel: #1b2030; --line: #2c3346; --code: #1b2030; --ok: #7bc47f;
  }
}
:root[data-theme="dark"] {
  --bg: #12151d; --fg: #e6e9f0; --muted: #a3abbd; --accent: #9fb0ff; --accent2: #5cc8c4;
  --panel: #1b2030; --line: #2c3346; --code: #1b2030; --ok: #7bc47f;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 "Lato", system-ui, -apple-system, "Segoe UI", sans-serif; }
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 16px; }
.top { border-bottom: 1px solid var(--line); background: var(--panel); }
.top .wrap { display: flex; flex-wrap: wrap; align-items: baseline; gap: .4rem 1.4rem; padding-top: .8rem; padding-bottom: .8rem; }
.brand { font-weight: 700; color: var(--accent); text-decoration: none; font-size: 1.1rem; }
.brand span { font-weight: 400; color: var(--muted); }
nav { display: flex; flex-wrap: wrap; gap: .2rem 1rem; }
nav a { color: var(--fg); text-decoration: none; font-size: .95rem; }
nav a:hover { color: var(--accent2); }
h1 { color: var(--accent); font-size: 1.9rem; line-height: 1.25; margin: 1.6rem 0 .3rem; }
.subtitle { color: var(--muted); margin-top: 0; font-size: 1.05rem; }
h2 { color: var(--accent); font-size: 1.3rem; margin-top: 2rem; border-bottom: 1px solid var(--line); padding-bottom: .2rem; }
h3 { font-size: 1.08rem; margin-top: 1.4rem; }
a { color: var(--accent2); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em;
  background: var(--code); padding: .08em .3em; border-radius: 3px; }
pre { background: var(--code); border: 1px solid var(--line); border-radius: 6px; padding: .8rem 1rem;
  overflow-x: auto; line-height: 1.45; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .95rem; display: block; overflow-x: auto; }
th, td { border-bottom: 1px solid var(--line); padding: .45rem .6rem; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 700; }
blockquote { margin: 1rem 0; padding: .6rem 1rem; background: var(--panel); border-left: 4px solid var(--accent2); border-radius: 0 6px 6px 0; }
blockquote p { margin: .3rem 0; }
footer { color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); margin-top: 3rem; padding-top: 1rem; padding-bottom: 2rem; }
img { max-width: 100%; }

/* ---- hero, buttons, cards, badges ---- */
.hero { padding: 2.4rem 0 1.2rem; }
.hero .kicker { text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; color: var(--accent2); font-weight: 700; margin: 0; }
.hero h1 { font-size: 2.5rem; margin: .4rem 0 .5rem; letter-spacing: -.01em; }
.hero .lead { font-size: 1.15rem; color: var(--muted); margin: 0 0 1.3rem; max-width: 38rem; }
.buttons { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1rem 0 .4rem; }
.btn { display: inline-block; padding: .55rem 1rem; border-radius: 6px; text-decoration: none;
  font-weight: 700; font-size: .95rem; border: 1px solid var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--bg); }
.btn:hover { filter: brightness(1.12); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: .8rem; margin: 1rem 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: .9rem 1rem; }
.card p { margin: .25rem 0; font-size: .95rem; }
.card h3, .card strong:first-child { margin-top: 0; color: var(--accent); }
.badge { display: inline-block; font-size: .75rem; font-weight: 700; padding: .05rem .45rem; border-radius: 99px;
  border: 1px solid var(--line); color: var(--muted); white-space: nowrap; }
.badge.live { border-color: var(--ok); color: var(--ok); }
.principle { font-size: 1.05rem; border-left: 4px solid var(--accent); padding: .2rem 0 .2rem 1rem; color: var(--fg); margin: 1.6rem 0; }
pre { position: relative; }
button.copy { position: absolute; top: .4rem; right: .4rem; font: 600 .75rem "Lato", sans-serif;
  padding: .2rem .5rem; border-radius: 4px; border: 1px solid var(--line); background: var(--bg); color: var(--muted); cursor: pointer; }
button.copy:hover { color: var(--accent2); }
@media (max-width: 520px) { .hero h1 { font-size: 1.9rem; } body { font-size: 16px; } }

pre.text, pre.text code { white-space: pre-wrap; word-break: break-word; }