:root{
  --ink:#0d151d; --deep:#131e28; --line:#1f2d3a; --paper:#f4f7fb; --white:#fff;
  --text:#0d151d; --mute:#5a6b7d; --rule:#d6dfea; --cyan:#00d2e8; --violet:#6350ff;
  --peach:#f0b088; --tip:#e9fbfd; --tipline:#00a9bd; --note:#fdf0e6; --noteline:#d98a52;
  --grad:linear-gradient(135deg,#00d2e8 0%,#6350ff 100%);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--paper);color:var(--text);font-family:Montserrat,"Helvetica Neue",Arial,sans-serif;font-size:16.5px;line-height:1.7;font-weight:500;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:4px}
.in{max-width:1180px;margin-inline:auto;padding-inline:24px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:8px 12px;border-radius:8px;z-index:20}
.skip:focus{left:8px}
[hidden]{display:none!important}

.btn{display:inline-block;background:var(--grad);color:#fff;font:700 15px Montserrat,sans-serif;text-decoration:none;padding:13px 22px;border-radius:12px;border:0;cursor:pointer}
.btn-sm{padding:9px 16px;font-size:14px}

/* header */
.top{background:var(--ink);color:#fff;position:relative;overflow:hidden;overflow:clip;padding-block:48px 56px}
.top::before{content:"";position:absolute;width:640px;height:640px;right:-200px;top:-300px;border-radius:50%;background:radial-gradient(circle,rgba(99,80,255,.5),transparent 62%)}
.top::after{content:"";position:absolute;width:520px;height:520px;left:-240px;bottom:-340px;border-radius:50%;background:radial-gradient(circle,rgba(0,210,232,.26),transparent 62%)}
.top .in{position:relative;z-index:1}
.sitebar{position:sticky;top:0;z-index:50;background:rgba(13,21,29,.92);-webkit-backdrop-filter:saturate(1.4) blur(12px);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line);color:#fff}
.bar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-block:12px}
.brand img{display:block;height:40px;width:auto}
.bar nav{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:600;color:#b7c6d1}
.bar nav a:not(.btn){text-decoration:none}
.bar nav a:not(.btn):hover{color:#fff}
.hero h1{font-size:clamp(34px,5.5vw,60px);font-weight:800;letter-spacing:-.04em;line-height:1}
.hero>p:not(.status){margin-top:14px;color:#b7c6d1;font-size:19px}
#searchform{position:relative;margin-top:28px;max-width:640px}
#q{width:100%;font:600 18px Montserrat,sans-serif;padding:18px 54px 18px 22px;border-radius:14px;border:2px solid #2b3d4d;background:#0a1118;color:#fff}
#q::placeholder{color:#6f8394;font-weight:500}
#q:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 4px rgba(0,210,232,.18)}
#searchform kbd{position:absolute;right:16px;top:50%;transform:translateY(-50%);font:600 13px Montserrat,sans-serif;color:#8ea3b0;border:1px solid #2b3d4d;border-radius:6px;padding:2px 8px}
.status{margin-top:12px;min-height:1.7em;color:var(--cyan);font-weight:600;font-size:15px}

/* layout */
.layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:56px;padding-block:48px 96px;align-items:start}
.side{position:sticky;top:88px;max-height:calc(100vh - 104px);overflow:auto;padding-right:8px;font-size:14px;line-height:1.45}
.navtoggle{display:none}
.navcat{margin-bottom:18px}
.navhead{display:block;font-weight:800;text-decoration:none;margin-bottom:6px}
.navcat ul{border-left:2px solid var(--rule)}
.navcat li a{display:block;padding:5px 0 5px 14px;margin-left:-2px;border-left:2px solid transparent;text-decoration:none;color:var(--mute)}
.navcat li a:hover{color:var(--text)}
.navcat li a.here{color:var(--text);font-weight:700;border-left-color:var(--violet)}

/* topic tiles */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin-bottom:72px}
.tile{display:flex;flex-direction:column;gap:6px;background:var(--white);border:1px solid var(--rule);border-radius:14px;padding:20px;text-decoration:none;transition:border-color .15s,transform .15s}
.tile:hover{border-color:var(--violet);transform:translateY(-2px)}
.tile b{font-size:18px;font-weight:800;letter-spacing:-.02em}
.tile span{color:var(--mute);font-size:14px;line-height:1.5}
.tile em{margin-top:auto;padding-top:6px;font-style:normal;font-size:13px;font-weight:700;color:var(--violet)}

/* articles */
.cat{margin-bottom:72px}
.cathead{padding-bottom:18px;border-bottom:2px solid var(--ink);margin-bottom:8px;scroll-margin-top:84px}
.cathead h2{font-size:clamp(26px,3.6vw,38px);font-weight:800;letter-spacing:-.04em;line-height:1.1}
.cathead p{margin-top:6px;color:var(--mute)}
.doc{padding-block:40px;border-bottom:1px solid var(--rule);scroll-margin-top:84px;max-width:760px}
.doc:last-child{border-bottom:0}
.doc h3{font-size:24px;font-weight:800;letter-spacing:-.03em;line-height:1.2}
.anchor{text-decoration:none}
.anchor:hover{text-decoration:underline;text-decoration-color:var(--violet);text-underline-offset:4px}
.lede{margin-top:8px;color:var(--mute);font-size:18px}
.doc h4{margin-top:26px;font-size:17px;font-weight:700}
.doc>p,.doc>ul,.doc>ol,.doc>.tablewrap,.doc>figure{margin-top:16px}
.doc h4+p,.doc h4+ul{margin-top:8px}
.doc code{background:#e6ecf4;padding:2px 7px;border-radius:5px;font-size:.9em}
.steps{counter-reset:s}
.steps li{counter-increment:s;position:relative;padding:0 0 14px 46px}
.steps li::before{content:counter(s);position:absolute;left:0;top:1px;width:30px;height:30px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;font-size:14px;display:grid;place-items:center}
.bullets li{position:relative;padding:3px 0 3px 22px}
.bullets li::before{content:"";position:absolute;left:3px;top:.85em;width:7px;height:7px;border-radius:50%;background:var(--violet)}
.callout{padding:14px 18px;border-radius:10px;border-left:4px solid}
.callout.tip{background:var(--tip);border-color:var(--tipline)}
.callout.note{background:var(--note);border-color:var(--noteline)}
figure{background:var(--ink);border-radius:14px;padding:10px;overflow:hidden}
figure .zoom{display:block;width:100%;padding:0;border:0;background:none;cursor:zoom-in;border-radius:8px;overflow:hidden}
figure img{display:block;width:100%;height:auto}
figcaption{padding:10px 6px 4px;color:#9db0bd;font-size:13.5px;line-height:1.5}
.tablewrap{overflow-x:auto;border:1px solid var(--rule);border-radius:12px;background:var(--white)}
table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.5}
th,td{text-align:left;vertical-align:top;padding:11px 16px;border-bottom:1px solid var(--rule)}
thead th{background:#e9eef5;font-weight:700;font-size:13.5px}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
tbody th{font-weight:700;white-space:nowrap}
.none{padding:40px 0;max-width:560px}
.none h2{font-size:28px;font-weight:800;letter-spacing:-.03em;margin-bottom:10px}
.none p{margin-top:10px}
.foot{margin-top:24px;color:var(--mute);font-size:14px}

/* lightbox */
dialog#lightbox{border:0;padding:0;background:transparent;max-width:min(1200px,94vw);max-height:92vh;overflow:visible}
dialog#lightbox::backdrop{background:rgba(5,9,13,.82)}
dialog#lightbox img{display:block;max-width:100%;max-height:86vh;margin-inline:auto;border-radius:12px}
#lbclose{display:block;margin:0 0 10px auto;background:#fff;color:#000;border:0;border-radius:8px;padding:7px 14px;font:700 14px Montserrat,sans-serif;cursor:pointer}

@media (max-width:900px){
  .layout{grid-template-columns:minmax(0,1fr);gap:24px;padding-top:28px}
  .side{position:static;max-height:none;overflow:visible}
  .navtoggle{display:block;width:100%;text-align:left;font:700 15px Montserrat,sans-serif;background:var(--white);border:1px solid var(--rule);border-radius:12px;padding:13px 16px;cursor:pointer}
  #sidenav{display:none;margin-top:10px;background:var(--white);border:1px solid var(--rule);border-radius:12px;padding:16px;max-height:60vh;overflow:auto}
  #sidenav.open{display:block}
  .bar nav a:not(.btn){display:none}
  .brand img{height:34px}
  .side{top:auto}
  .doc{padding-block:32px}
  .steps li{padding-left:42px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important}
}

/* search results mode */
.pill{display:none;margin-bottom:8px;font-size:13px;font-weight:700;color:var(--violet)}
.searching .pill{display:block}
.results .doc{background:var(--white);border:1px solid var(--rule);border-radius:16px;padding:28px 32px;margin-bottom:16px;max-width:none}
.results .doc:last-child{border-bottom:1px solid var(--rule)}
@media (max-width:900px){.results .doc{padding:22px 18px}}