:root{color-scheme:light dark;--paper:#F7F7F5;--surface:#FFFFFF;--ink:#0A0A0A;--ink-2:#44443F;--mute:#6B6B66;--line:#E3E3DF;--accent:#1F3FBF;--accent-ink:#FFFFFF;--warn:#B45309;--good:#15803D;--r:8px;
--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,"Helvetica Neue",Arial,sans-serif}
@media (prefers-color-scheme:dark){:root{--paper:#121211;--surface:#1A1A19;--ink:#ECECE8;--ink-2:#C2C2BC;--mute:#9A9A93;--line:#2C2C2A;--accent:#8FA7FF;--accent-ink:#0A0A0A;--warn:#F0A24C;--good:#5BD07A}}
*{box-sizing:border-box}html,body{margin:0}
body{background:var(--paper);color:var(--ink);font:16px/1.6 var(--sans);-webkit-text-size-adjust:100%}
a{color:var(--accent);text-underline-offset:2px}a:hover{text-decoration-thickness:2px}
h1,h2,h3{margin:0;color:var(--ink)}
h1{font-size:32px;line-height:1.2;font-weight:600;letter-spacing:-.01em}
h2{font-size:20px;line-height:1.3;font-weight:600}
h3{font-size:16px;line-height:1.4;font-weight:600}
p{margin:0 0 14px}ul,ol{margin:0 0 14px;padding-left:22px}li{margin:4px 0}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.ico{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;flex:none}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-9999px;top:0;background:var(--surface);color:var(--ink);padding:8px 12px;border:1px solid var(--line);z-index:10}.skip:focus{left:8px;top:8px}
/* header */
.top{border-bottom:1px solid var(--line)}
.topin{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:8px;color:var(--ink);text-decoration:none;font-weight:600;font-size:16px}
.brand svg{width:24px;height:24px;fill:none;stroke:var(--accent);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:var(--ink-2);text-decoration:none;font-size:14px;padding:10px 12px;border-radius:var(--r);min-height:44px;display:inline-flex;align-items:center}
.nav a:hover{color:var(--ink);background:var(--line)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:600}
/* hero */
.hero{padding:40px 0 24px}
.hero .lead{font-size:18px;line-height:1.5;color:var(--ink-2);max-width:62ch;margin:12px 0 0}
.crumb{font-size:12px;color:var(--mute);margin:0 0 12px}.crumb a{color:var(--mute)}
/* tool */
.tool{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:24px;align-items:start;margin:8px 0 8px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;min-width:0}
.stagebox{display:flex;flex-direction:column;gap:12px}
.stagebar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.seg button{background:transparent;color:var(--ink-2);border:0;min-height:36px;padding:0 14px;font:500 14px var(--sans);cursor:pointer}
.seg button+button{border-left:1px solid var(--line)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.stage{position:relative;border:1px solid var(--line);border-radius:var(--r);background:#fff;min-height:300px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.stage canvas{display:block;max-width:100%;max-height:560px;width:auto;height:auto;background:#fff}
.drop{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:24px;background:var(--surface);color:var(--ink)}
.drop[hidden]{display:none}
.drop.over{outline:2px solid var(--accent);outline-offset:-6px}
.drop p{margin:0}.drop .hint{font-size:12px;color:var(--mute)}
.drop .big{font-size:20px;line-height:1.3;font-weight:600}
.actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.status{font-size:12px;color:var(--mute);min-height:18px;margin:0}
.status.err{color:var(--warn)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 14px;border-radius:var(--r);font:500 14px var(--sans);cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--ink);text-decoration:none}
.btn:hover{border-color:var(--mute);text-decoration:none}
.btn-main{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.btn-main:hover{border-color:var(--accent);filter:brightness(1.08)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn-text{border-color:transparent;color:var(--accent);padding:0 8px}.btn-text:hover{text-decoration:underline;border-color:transparent}
/* controls */
.controls{display:flex;flex-direction:column;gap:16px}
.controls h2{font-size:16px;line-height:1.4}
.ctl{display:flex;flex-direction:column;gap:4px}
.ctl label,.ctl .lab{font-size:14px;font-weight:500;display:flex;justify-content:space-between;gap:8px}
.ctl output{color:var(--mute);font-variant-numeric:tabular-nums;font-weight:400}
.ctl .help{font-size:12px;color:var(--mute);margin:0}
input[type=range]{width:100%;min-height:32px;accent-color:var(--accent);margin:0}
select{min-height:44px;font:16px var(--sans);color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:0 10px;width:100%}
.chk{display:flex;gap:10px;align-items:flex-start;font-size:14px;min-height:32px}
.chk input{width:18px;height:18px;margin:2px 0 0;accent-color:var(--accent)}
.seg.full{display:flex}.seg.full button{flex:1;min-height:44px}
fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:14px;font-weight:500;padding:0;margin-bottom:4px}
.rule{border-top:1px solid var(--line);padding-top:16px}
.dl{display:flex;flex-direction:column;gap:8px}
.dl .row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.dl .btn{padding:0 8px}
.pro{display:flex;flex-direction:column;gap:8px}
.pro .meta{font-size:12px;color:var(--mute);margin:0}
.pro .btn{justify-content:flex-start;width:100%}
.soon{white-space:nowrap;color:var(--mute);font-weight:400;margin-left:auto;font-size:12px}
.paid-note{font-size:12px;color:var(--mute);margin:0}
.paid-note[hidden]{display:none}
/* content */
.content{padding:8px 0 40px}
.sec{border-top:1px solid var(--line);margin-top:40px;padding-top:24px}
.sec h2{margin-bottom:12px}
.prose{max-width:72ch}
.prose h3{margin:20px 0 6px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid3 .col{border-top:1px solid var(--line);padding-top:12px}
.grid3 .col h3{margin-bottom:6px}
.steps{counter-reset:s;list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.steps li{counter-increment:s;border-top:1px solid var(--line);padding-top:12px;margin:0}
.steps li::before{content:counter(s);display:block;font-size:20px;font-weight:300;color:var(--mute);font-variant-numeric:tabular-nums;margin-bottom:4px}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:520px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600;color:var(--ink)}tr:last-child td{border-bottom:0}
details.faq{border-top:1px solid var(--line)}details.faq:last-of-type{border-bottom:1px solid var(--line)}
details.faq summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:600;list-style:none;padding:8px 0}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";margin-left:auto;color:var(--mute);font-weight:300;font-size:20px}
details.faq[open] summary::after{content:"\2212"}
details.faq p{max-width:72ch;color:var(--ink-2)}
.related{display:flex;gap:16px;flex-wrap:wrap}
.related a{display:block;border:1px solid var(--line);border-radius:var(--r);padding:12px 16px;background:var(--surface);text-decoration:none;color:var(--ink);min-width:0;flex:1 1 220px}
.related a:hover{border-color:var(--mute)}.related span{display:block;font-size:12px;color:var(--mute);font-weight:400}
.related b{font-weight:600}
/* legal */
.legal{max-width:72ch;padding:40px 24px}.legal h1{margin-bottom:16px}.legal h2{margin:28px 0 8px}
.legal p,.legal li{color:var(--ink-2)}
/* footer */
.foot{border-top:1px solid var(--line);margin-top:24px;padding:24px 0 40px;font-size:14px;color:var(--mute)}
.footin{display:flex;gap:24px;justify-content:space-between;flex-wrap:wrap}
.foot nav{display:flex;flex-direction:column;gap:2px}
.foot nav a{color:var(--ink-2);text-decoration:none;min-height:32px;display:inline-flex;align-items:center}.foot nav a:hover{text-decoration:underline}
.foot p{max-width:56ch;margin:8px 0 0;font-size:12px}
.wrap-narrow{max-width:720px;margin:0 auto;padding:64px 24px}
@media (max-width:900px){
 .tool{grid-template-columns:minmax(0,1fr)}
 .grid3,.steps{grid-template-columns:minmax(0,1fr);gap:16px}
}
@media (max-width:560px){
 .brand{min-height:44px}.seg button{min-height:44px}.foot nav a{min-height:44px}
 .wrap{padding:0 16px}
 h1{font-size:28px}
 .hero{padding:24px 0 16px}.hero .lead{font-size:16px}
 .dl .row{grid-template-columns:1fr}
 .stage{min-height:240px}
 .legal{padding:24px 16px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}