:root{--bg:#fbfcfe;--surface:#f1f5fa;--ink:#13233a;--ink-2:rgba(19,35,58,.7);--line:#d6dfec;--accent:#1f4e8c;--accent-deep:#163a6b;--accent-soft:#e9eff8;--on-accent:#fff;--r:10px;--shadow:0 1px 2px rgba(19,35,58,.06);--warn-bg:#fff4d6;--warn-ink:#6b4a00;--ok:#1f8a5b}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:17px;line-height:1.72}
h1,h2,h3,.m-brand{font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;color:var(--ink)}
a{color:var(--accent-deep);text-underline-offset:3px}
a:focus-visible,summary:focus-visible,.m-btn:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.m-skip{position:absolute;left:-9999px}.m-skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:50}
.m-wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.m-top{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.m-top .m-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.m-brand{font-weight:800;font-size:18px;letter-spacing:-.01em;text-decoration:none;color:var(--ink)}
.m-brand span{color:var(--accent)}
.m-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.m-nav a{font-size:14.5px;text-decoration:none;color:var(--ink-2);padding:8px 10px;border-radius:8px}
.m-nav a:hover{background:var(--accent-soft);color:var(--accent-deep)}
.m-nav a.m-cur{color:var(--accent-deep);font-weight:700}
.m-btn{display:inline-block;background:var(--accent);color:var(--on-accent);font-weight:700;text-decoration:none;border-radius:calc(var(--r) * .8);padding:12px 20px;font-size:15.5px;line-height:1.2;border:2px solid var(--accent)}
.m-btn:hover{background:var(--accent-deep);border-color:var(--accent-deep)}
.m-btn.m-ghost{background:transparent;color:var(--accent-deep)}
.m-btn.m-ghost:hover{background:var(--accent-soft)}
.m-btn.m-small{padding:9px 14px;font-size:14px;white-space:nowrap}
.m-kicker{text-transform:uppercase;letter-spacing:.13em;font-size:12px;font-weight:800;color:var(--accent-deep)}
h1{font-size:clamp(32px,4.8vw,52px);line-height:1.07;letter-spacing:-.025em;margin:.25em 0 .4em;text-wrap:balance}
h2{font-size:clamp(25px,3vw,33px);line-height:1.15;letter-spacing:-.018em;margin:0 0 14px;text-wrap:balance}
h3{font-size:19px;line-height:1.3;margin:0 0 6px}
p{margin:.65em 0;max-width:68ch}
.m-lead{font-size:clamp(18px,2vw,21px);color:var(--ink-2);max-width:60ch;line-height:1.6;margin:0}
.m-hero{padding:56px 0 44px;background:linear-gradient(180deg,#eaf0f9 0%,#fbfcfe 100%);}
.m-hero .m-wrap{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.m-hero .m-acts{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.m-trust{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;font-size:14px;color:var(--ink-2)}
.m-trust span::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:8px;vertical-align:middle}
.m-art svg{width:100%;height:auto;display:block;border-radius:calc(var(--r) * 1.6);overflow:hidden}
.m-page-head{padding:34px 0 8px}
.m-page-head .m-wrap{max-width:1120px}
.m-crumbs{font-size:14px;color:var(--ink-2);margin-bottom:10px}
.m-crumbs a{color:var(--ink-2)}.m-crumbs i{font-style:normal;margin:0 6px;opacity:.6}
.m-meta{display:flex;gap:6px 18px;flex-wrap:wrap;margin-top:18px;font-size:14px;color:var(--ink-2)}
.m-layout{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:56px;align-items:start;padding-top:36px;padding-bottom:40px}
.m-doc{min-width:0;max-width:780px}
.m-doc section{margin:0 0 46px;scroll-margin-top:84px}
.m-doc section:last-of-type{margin-bottom:24px}
.m-side{position:sticky;top:86px;display:grid;gap:16px}
.m-toc{border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;background:var(--surface)}
.m-toc b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-2);margin-bottom:8px}
.m-toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.m-toc li{counter-increment:t;margin:0}
.m-toc a{display:block;padding:6px 0 6px 26px;position:relative;font-size:14.5px;line-height:1.4;color:var(--ink-2);text-decoration:none}
.m-toc a::before{content:counter(t);position:absolute;left:0;top:6px;width:18px;height:18px;border-radius:50%;background:var(--accent-soft);color:var(--accent-deep);font-size:11px;font-weight:800;display:grid;place-items:center}
.m-toc a:hover{color:var(--accent-deep)}
.m-sidecta{border-radius:var(--r);background:var(--accent-deep);color:#fff;padding:20px}
.m-sidecta b{display:block;font-size:17px;line-height:1.3;margin-bottom:6px;font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif}
.m-sidecta p{font-size:14.5px;color:rgba(255,255,255,.82);margin:.3em 0 14px}
.m-sidecta .m-btn{background:#fff;color:var(--accent-deep);border-color:#fff;width:100%;text-align:center}
.m-summary{background:var(--accent-soft);border-radius:var(--r);padding:22px 26px;margin:0 0 42px}
.m-summary b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--accent-deep);margin-bottom:8px}
.m-summary ul{margin:0;padding-left:1.15em}.m-summary li{margin:.35em 0}
ul.m-clean,ol.m-rules{padding-left:1.25em;margin:.7em 0;max-width:68ch}
ul.m-clean li,ol.m-rules li{margin:.5em 0}
ol.m-rules li::marker{color:var(--accent);font-weight:800}
.m-callout{display:flex;gap:12px;border-radius:var(--r);padding:16px 20px;margin:20px 0;max-width:72ch;font-size:16px;line-height:1.6}
.m-callout strong{flex:0 0 auto;font-size:12px;text-transform:uppercase;letter-spacing:.1em;padding-top:3px;min-width:84px}
.m-callout p{margin:0}
.m-co-tip{background:var(--accent-soft)}.m-co-tip strong{color:var(--accent-deep)}
.m-co-warn{background:var(--warn-bg);color:var(--warn-ink)}
.m-co-key{background:var(--ink);color:#fff}.m-co-key strong{color:#fff;opacity:.8}.m-co-key a{color:#fff}
.m-steps{list-style:none;margin:24px 0;padding:0;counter-reset:s;max-width:72ch}
.m-steps li{counter-increment:s;position:relative;padding:0 0 26px 58px}
.m-steps li::before{content:counter(s);position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;display:grid;place-items:center;z-index:1}
.m-steps li::after{content:"";position:absolute;left:18px;top:42px;bottom:4px;width:2px;background:var(--line)}
.m-steps li:last-child::after{display:none}.m-steps li:last-child{padding-bottom:0}
.m-steps p{margin:.2em 0}
.m-tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff;margin:20px 0}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:15.5px;font-variant-numeric:tabular-nums}
th{text-align:left;background:var(--surface);font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:12px 16px;color:var(--ink-2)}
td{padding:13px 16px;border-top:1px solid var(--line);vertical-align:top}
td:first-child{font-weight:600}
.m-cards{display:grid;gap:18px;margin:22px 0}
.m-cols2{grid-template-columns:repeat(2,1fr)}.m-cols3{grid-template-columns:repeat(3,1fr)}
.m-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;color:var(--ink);text-decoration:none;box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
a.m-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.m-card h3{color:var(--accent-deep)}.m-card p{font-size:15.5px;color:var(--ink-2);margin:.2em 0 0}
.m-card .m-more{margin-top:auto;padding-top:14px;font-weight:700;font-size:14.5px;color:var(--accent-deep)}
details{border:1px solid var(--line);border-radius:var(--r);background:#fff;padding:2px 20px;margin:10px 0}
summary{cursor:pointer;font-weight:700;padding:15px 0;list-style:none;font-size:17px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;color:var(--accent);font-weight:800;font-size:20px;line-height:1}
details[open] summary::after{content:"\2212"}
details p{margin:0 0 16px}
.m-callbox{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;max-width:620px;margin:22px 0;box-shadow:var(--shadow)}
.m-bar{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:14px}
.m-dot{width:9px;height:9px;border-radius:50%;background:var(--ok);display:inline-block}
.m-msg{max-width:88%;padding:9px 13px;border-radius:14px;margin:8px 0;font-size:15px;line-height:1.5}
.m-msg small{display:block;font-size:11px;opacity:.72;text-transform:uppercase;letter-spacing:.08em;margin-bottom:2px}
.m-msg.m-in{background:var(--surface);border-bottom-left-radius:4px}
.m-msg.m-ai{background:var(--accent);color:#fff;margin-left:auto;border-bottom-right-radius:4px}
.m-note{font-size:12.5px;color:var(--ink-2);margin:10px 2px 0}
.m-keypad{display:grid;grid-template-columns:repeat(3,52px);gap:8px;margin:14px 0}
.m-keypad span{display:grid;place-items:center;height:44px;border:1px solid var(--line);border-radius:calc(var(--r) * .5);font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-weight:700;background:var(--surface)}
.m-keypad span.m-on{background:var(--accent);color:#fff;border-color:var(--accent)}
.m-author{display:flex;gap:18px;align-items:flex-start;border:1px solid var(--line);border-radius:var(--r);padding:22px;margin:44px 0 0;background:var(--surface)}
.m-avatar{flex:0 0 56px;width:56px;height:56px;border-radius:50%;background:var(--accent-deep);color:#fff;display:grid;place-items:center;font-weight:800;letter-spacing:.04em;font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif}
.m-author b{display:block;font-size:17px}.m-author em{font-style:normal;color:var(--ink-2);font-size:14px}
.m-author p{font-size:15px;margin:.5em 0 0;color:var(--ink-2)}
.m-related{margin:44px 0 0}
.m-related h2{font-size:22px}
.m-band{margin:12px 0 0;background:var(--accent-deep);color:#fff;padding:52px 0}
.m-band .m-wrap{display:flex;gap:28px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.m-band h2{color:#fff;margin:0 0 6px}.m-band p{color:rgba(255,255,255,.85);margin:0;max-width:56ch}
.m-band .m-btn{background:#fff;color:var(--accent-deep);border-color:#fff}
.m-band .m-btn:hover{background:var(--accent-soft)}
.m-foot{border-top:1px solid var(--line);background:var(--surface);padding:40px 0 30px;font-size:14.5px;color:var(--ink-2)}
.m-foot .m-wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px}
.m-foot b{color:var(--ink);display:block;margin-bottom:8px}
.m-foot ul{list-style:none;margin:0;padding:0}.m-foot li{margin:.4em 0}
.m-foot a{color:var(--ink-2)}
.m-foot .m-small{grid-column:1/-1;border-top:1px solid var(--line);padding-top:16px;font-size:13px}
@media (max-width:980px){
 .m-layout{grid-template-columns:1fr;gap:8px}.m-side{position:static;order:-1}.m-sidecta{display:none}
 .m-hero .m-wrap{grid-template-columns:1fr;gap:28px}.m-hero{padding:36px 0 28px}.m-art{max-width:520px}
 .m-foot .m-wrap{grid-template-columns:1fr}
}
@media (max-width:720px){
 .m-top .m-wrap{flex-wrap:wrap;padding-top:10px;padding-bottom:10px}.m-nav{gap:2px}.m-nav a{font-size:13.5px;padding:6px 8px}
 .m-cols2,.m-cols3{grid-template-columns:1fr}.m-callout{flex-direction:column;gap:4px}.m-author{flex-direction:column}
 body{font-size:16.5px}.m-btn.m-small{display:none}
}

[hidden]{display:none!important}
.m-tool{border:1px solid var(--line);border-radius:var(--r);background:var(--surface);padding:24px;margin:24px 0;max-width:780px}
.m-tool h3{margin:0 0 4px;font-size:20px}
.m-tl{color:var(--ink-2);font-size:15px;margin:0 0 18px;max-width:64ch}
.m-tgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 18px}
.m-tgrid .m-wide{grid-column:1/-1}
.m-field label{display:block;font-weight:700;font-size:14px;margin-bottom:5px}
.m-field input,.m-field select,.m-field textarea{width:100%;font:inherit;font-size:16px;padding:10px 12px;border:1px solid var(--line);border-radius:calc(var(--r) * .6);background:#fff;color:var(--ink)}
.m-field textarea{min-height:130px;resize:vertical;line-height:1.5}
.m-field input:focus,.m-field select:focus,.m-field textarea:focus{outline:3px solid var(--accent-soft);border-color:var(--accent)}
.m-field small{display:block;color:var(--ink-2);font-size:12.5px;margin-top:4px;line-height:1.4}
.m-field input[type=range]{padding:0;accent-color:var(--accent)}
.m-res{margin-top:18px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:calc(var(--r) * .7);padding:16px 18px}
.m-res .m-big{font-size:30px;font-weight:800;line-height:1.15;color:var(--accent-deep);font-variant-numeric:tabular-nums}
.m-res .m-big small{font-size:14px;font-weight:600;color:var(--ink-2)}
.m-res .m-row{display:flex;justify-content:space-between;gap:14px;padding:7px 0;border-top:1px solid var(--line);font-size:15px;font-variant-numeric:tabular-nums}
.m-res .m-row:first-of-type{margin-top:8px}
.m-res .m-row b{text-align:right}
.m-verdict{display:inline-block;font-weight:800;font-size:13px;border-radius:999px;padding:3px 12px;margin:2px 0}
.m-verdict[data-v="ok"]{background:#d9f2e6;color:#0e6b43}
.m-verdict[data-v="mid"]{background:var(--warn-bg);color:var(--warn-ink)}
.m-verdict[data-v="bad"]{background:#fde2e2;color:#a31b1b}
.m-out{white-space:pre-wrap;background:#fff;border:1px dashed var(--accent);border-radius:calc(var(--r) * .7);padding:14px 16px;font-size:17px;margin-top:16px;line-height:1.55}
.m-tbtns{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.m-tbtns button,.m-cp{font:inherit;font-weight:700;font-size:14.5px;padding:9px 16px;border-radius:calc(var(--r) * .7);border:2px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer}
.m-tbtns button.m-ghost,.m-cp{background:transparent;color:var(--accent-deep)}
.m-tbtns button:hover,.m-cp:hover{background:var(--accent-deep);color:#fff;border-color:var(--accent-deep)}
.m-cp{padding:5px 12px;font-size:13px;white-space:nowrap}
.m-codes{width:100%;min-width:0;border-collapse:collapse;margin-top:14px;background:#fff;border:1px solid var(--line)}
.m-codes td{padding:10px 12px;border-top:1px solid var(--line);font-size:14.5px}
.m-codes code{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:14.5px;font-weight:700;color:var(--accent-deep);word-break:break-all}
.m-chk{list-style:none;margin:6px 0 0;padding:0}
.m-chk li{display:flex;gap:12px;align-items:flex-start;padding:9px 0;border-top:1px solid var(--line);font-size:15.5px;line-height:1.5}
.m-chk input{margin-top:4px;width:18px;height:18px;flex:0 0 auto;accent-color:var(--accent)}
.m-chk h4{margin:18px 0 2px;font-size:15px;color:var(--accent-deep)}
.m-prog{height:10px;border-radius:99px;background:var(--line);overflow:hidden;margin:8px 0 2px}
.m-prog i{display:block;height:100%;background:var(--accent);width:0;transition:width .2s}
.m-grid7{width:100%;min-width:640px;border-collapse:collapse;background:#fff}
.m-grid7 th,.m-grid7 td{padding:9px 10px;border-top:1px solid var(--line);font-size:14.5px;text-align:left}
.m-grid7 select,.m-grid7 input{font:inherit;font-size:15px;padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:#fff;width:100%}
@media (max-width:720px){.m-tgrid{grid-template-columns:1fr}.m-tool{padding:18px}.m-codes,.m-codes tbody{display:block}.m-codes tr{display:block;padding:10px 12px;border-top:1px solid var(--line)}.m-codes tr:first-child{border-top:0}.m-codes td{display:block;border:0;padding:3px 0}}
@media print{.m-top,.m-side,.m-band,.m-foot,.m-tbtns{display:none!important}.m-layout{display:block}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.m-card{transition:none}}


.m-doc h2{padding-bottom:10px;border-bottom:1px solid var(--line)}
.m-hero{border-bottom:1px solid var(--line)}
.m-kicker{font-variant:small-caps;letter-spacing:.12em;font-size:13.5px}
.m-btn{border-radius:6px}