:root{--bg:#fff;--fg:#111;--mut:#555;--line:#ddd;--acc:#1f3864;--sim:#a33;--tile:#f6f6f6}
@media (prefers-color-scheme:dark){:root{--bg:#111;--fg:#eee;--mut:#aaa;--line:#333;--acc:#9db4e0;--sim:#f08080;--tile:#1b1b1b}}
*{box-sizing:border-box}body{margin:0;font:16px/1.55 system-ui,sans-serif;background:var(--bg);color:var(--fg)}
.top{display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:.8rem 1.2rem;border-bottom:1px solid var(--line)}
.brand{font-weight:700;color:var(--fg);text-decoration:none}.tag{font-weight:400;color:var(--mut);font-size:.8em;margin-left:.4rem}
nav a{margin-left:.9rem;color:var(--acc);text-decoration:none}nav a:hover{text-decoration:underline}
.wrap{max-width:1100px;margin:0 auto;padding:1.5rem 1.2rem}.lead{font-size:1.1rem;max-width:60rem}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin:1.5rem 0}
.tile{background:var(--tile);border:1px solid var(--line);border-radius:8px;padding:1rem}.tile .n{font-size:1.8rem;font-weight:700}.tile .l{color:var(--mut)}
.sim{color:var(--sim);font-weight:700;font-size:.75em;letter-spacing:.05em;margin-left:.3rem}
.banner{background:var(--sim);color:#fff;padding:.5rem 1rem;border-radius:6px;font-weight:700;margin:1rem 0}
.btn{display:inline-block;border:1px solid var(--acc);color:var(--acc);padding:.4rem .8rem;border-radius:6px;text-decoration:none;margin-right:.5rem}
table{border-collapse:collapse;width:100%}th,td{border:1px solid var(--line);padding:.35rem .5rem;text-align:left;vertical-align:top;font-size:.92rem}
.scroll{overflow-x:auto;max-width:100%}pre{background:var(--tile);padding:.8rem;border-radius:6px;overflow-x:auto}
.md table{margin:1rem 0}.md h1{font-size:1.6rem}.md h2{font-size:1.25rem;margin-top:1.6rem}
.foot{color:var(--mut);border-top:1px solid var(--line);padding:1rem 1.2rem;font-size:.85rem}
textarea{width:100%;font-family:ui-monospace,monospace;font-size:.9rem}
.charts{display:grid;grid-template-columns:repeat(auto-fit,minmax(420px,1fr));gap:1.2rem}.chart{background:var(--tile);border:1px solid var(--line);border-radius:8px;padding:.6rem;overflow-x:auto}
.chart h3{margin:.2rem 0 .4rem;font-size:1rem}.chart .fn{color:var(--mut);font-size:.8rem}
.inline{display:inline}.linkbtn{background:none;border:0;color:var(--acc);cursor:pointer;font:inherit;margin-left:.9rem;padding:0}
.form{max-width:40rem}.form label{display:block;margin:.7rem 0 .2rem;font-weight:600}.form input[type=text],.form input[type=email],.form input[type=password],.form input[type=number],.form input[type=date],.form input[type=datetime-local],.form input[type=url],.form select,.form textarea{width:100%;padding:.45rem;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg);font:inherit}
.form .help{color:var(--mut);font-size:.85rem;margin:.15rem 0 0}.form .err{color:var(--sim);font-size:.9rem}.note{background:var(--tile);border-left:3px solid var(--acc);padding:.6rem .9rem;margin:1rem 0;font-size:.92rem}
button.primary{background:var(--acc);color:#fff;border:0;padding:.55rem 1rem;border-radius:6px;font:inherit;cursor:pointer}button.secondary{background:none;border:1px solid var(--line);padding:.5rem 1rem;border-radius:6px;font:inherit;cursor:pointer;color:var(--fg)}
.steps{display:flex;gap:.4rem;flex-wrap:wrap;margin:1rem 0}.steps span{padding:.2rem .6rem;border-radius:999px;background:var(--tile);border:1px solid var(--line);font-size:.8rem}.steps .cur{background:var(--acc);color:#fff;border-color:var(--acc)}.steps .done{opacity:.7}
.badge{display:inline-block;padding:.1rem .5rem;border-radius:999px;font-size:.75rem;font-weight:700;color:#fff}.badge.green{background:#2e7d32}.badge.amber{background:#c77700}.badge.red{background:#b3261e}.badge.grey{background:#666}
.subnav a{margin-right:1rem;color:var(--acc);text-decoration:none}.subnav{margin:.5rem 0 1.2rem;border-bottom:1px solid var(--line);padding-bottom:.6rem}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:.3rem 1rem}.kv dt{color:var(--mut)}