:root{
  --bg:#0A0B0D; --panel:#111317; --panel2:#161920; --line:#21252D; --line2:#2B313B;
  --text:#E9ECEF; --soft:#B9C1CC; --muted:#8A93A0; --acc:#C8F25A; --acc-ink:#0A0B0D;
  --loss:#FF7A59; --blue:#6AA8FF; --r:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 "Space Grotesk",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
.mono,code,pre,textarea,.trades{font-family:"JetBrains Mono",ui-monospace,monospace}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
a{color:var(--acc)}
.skip{position:absolute;left:-999px;top:8px;background:var(--acc);color:var(--acc-ink);padding:8px 12px;border-radius:8px;z-index:10}
.skip:focus{left:8px}
[hidden]{display:none!important}

/* top */
.top{position:sticky;top:0;z-index:5;background:rgba(10,11,13,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;flex-wrap:wrap}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:700;font-size:18px;letter-spacing:-.01em}
.logo svg{width:28px;height:28px}
.logo svg rect{fill:#15181d;stroke:var(--line2)}
.logo svg path{fill:none;stroke:var(--acc);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.logo b{color:var(--acc);font-weight:700}
.logo.sm{font-size:15px}.logo.sm svg{width:22px;height:22px}
.tabs{display:flex;gap:4px;flex-wrap:wrap}
.tabs a{color:var(--soft);text-decoration:none;padding:8px 14px;border-radius:999px;font-size:14px;transition:background .15s,color .15s}
.tabs a:hover{color:var(--text);background:var(--panel2)}
.tabs a[aria-current="page"]{color:var(--acc-ink);background:var(--acc)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:0 20px;border-radius:12px;border:1px solid var(--acc);
  background:var(--acc);color:var(--acc-ink);font:600 15px "Space Grotesk",sans-serif;text-decoration:none;cursor:pointer;transition:transform .12s,filter .15s,background .15s}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn:active{transform:translateY(1px) scale(.98)}
.btn:focus-visible,.tabs a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line2)}
.btn.ghost:hover{border-color:var(--acc)}
.btn.sm{min-height:36px;padding:0 14px;font-size:13px;border-radius:10px}
.btn.wide{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.spin{width:16px;height:16px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:sp .7s linear infinite;display:none}
.btn.loading .spin{display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}

/* home */
.hero{padding:96px 24px 64px}
.kicker{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.hero h1{font-size:clamp(52px,9vw,112px);line-height:.92;letter-spacing:-.04em;margin:20px 0 26px;font-weight:700}
.acc{color:var(--acc)}
.lead{font-size:19px;color:var(--soft);max-width:620px;margin:0}
.lead.sm{font-size:16px;max-width:720px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;padding-bottom:40px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.step .mono{color:var(--acc);font-size:13px}
.step h3{margin:14px 0 8px;font-size:20px}
.step p{margin:0;color:var(--soft);font-size:14.5px}
.band{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:80px}
.band div{padding:26px 20px 24px 0}
.band div+div{padding-left:20px;border-left:1px solid var(--line)}
.band b{display:block;font-size:34px;letter-spacing:-.02em}
.band span{color:var(--muted);font-size:14px}

/* panels & fields */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.field{display:grid;gap:6px;font-size:12.5px;color:var(--muted);margin-bottom:12px}
input,select,textarea{width:100%;background:var(--bg);border:1px solid var(--line2);border-radius:9px;color:var(--text);font:14px "Space Grotesk",sans-serif;padding:10px 11px}
textarea{font-size:12.5px;line-height:1.6;resize:vertical;min-height:170px;tab-size:2;white-space:pre}
input:focus,select:focus,textarea:focus{border-color:var(--acc);outline:none}
.row2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 12px}
.hint{font-size:12.5px;color:var(--muted);margin:0}
.hint.inline{display:block;font-size:11.5px}
details{border-bottom:1px solid var(--line);padding:4px 0 10px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600;padding:8px 0 12px;list-style:none;display:flex;justify-content:space-between;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--muted);font-weight:400}
details[open] summary::after{content:"–"}
.drop{display:block;border:1.5px dashed var(--line2);border-radius:12px;padding:18px;text-align:center;cursor:pointer;color:var(--soft);transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--acc);background:rgba(200,242,90,.05)}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.status{min-height:20px;font-size:13px;margin:10px 0 0;color:var(--muted)}
.status.err{color:var(--loss)}.status.ok{color:var(--acc)}

/* tester */
.tester{display:grid;grid-template-columns:360px minmax(0,1fr);gap:20px;padding-top:24px;padding-bottom:60px;align-items:start}
.controls{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto}
.results{display:grid;gap:16px;min-width:0}
.kpis{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px}
.kpi span{display:block;font-size:12px;color:var(--muted)}
.kpi b{display:block;font-size:24px;margin-top:4px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.kpi b.pos{color:var(--acc)}.kpi b.neg{color:var(--loss)}
.chart-box{position:relative}
.chart-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:12px;color:var(--muted)}
canvas{display:block;width:100%}
.empty{position:absolute;inset:44px 18px 18px;display:grid;place-items:center;color:var(--muted);font-size:14px;text-align:center;background:var(--panel)}
.subtabs{display:flex;gap:6px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.subtabs [role=tab]{background:transparent;border:1px solid var(--line2);color:var(--soft);border-radius:999px;padding:7px 14px;font:500 13px "Space Grotesk",sans-serif;cursor:pointer}
.subtabs [role=tab][aria-selected=true]{background:var(--panel2);color:var(--text);border-color:var(--acc)}
.push{margin-left:auto}
.report{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 24px}
.report .hint{grid-column:1/-1}
.rep-row{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.rep-row span{color:var(--muted)}
.rep-row b{font-weight:600;text-align:right}
.table-wrap{overflow:auto;max-height:440px}
.trades{width:100%;border-collapse:collapse;font-size:12px}
.trades th{position:sticky;top:0;background:var(--panel);text-align:left;color:var(--muted);font-weight:500;padding:8px;border-bottom:1px solid var(--line2)}
.trades td{padding:7px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
.trades td.pos{color:var(--acc)}.trades td.neg{color:var(--loss)}

/* pages */
.page-head{padding:56px 24px 24px}
.page-head h2{font-size:clamp(34px,5vw,56px);letter-spacing:-.03em;margin:12px 0 14px;line-height:1}
.page-head .btn{margin-top:24px}
.mc{display:grid;grid-template-columns:320px minmax(0,1fr);gap:20px;padding-bottom:60px;align-items:start}
.stress-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;padding-bottom:20px}
.stress-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px;display:flex;flex-direction:column;gap:10px;animation:rise .4s ease both}
.stress-card .badge{align-self:flex-start;font:600 12px "JetBrains Mono",monospace;padding:4px 10px;border-radius:999px}
.badge.pass{background:rgba(200,242,90,.14);color:var(--acc)}
.badge.fail{background:rgba(255,122,89,.14);color:var(--loss)}
.stress-card h3{margin:0;font-size:19px}
.stress-card p{margin:0;color:var(--muted);font-size:13.5px}
.stress-card .metric{font:500 16px "JetBrains Mono",monospace;color:var(--text)}
.score{display:flex;align-items:center;gap:20px;margin-bottom:80px}
.score b{font-size:44px;letter-spacing:-.02em}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.guide{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;padding-bottom:80px}
.guide h3{margin:0 0 10px;font-size:20px}
.guide p,.guide li{color:var(--soft);font-size:14.5px}
.guide ul{padding-left:18px;margin:8px 0}
.guide li{margin-bottom:6px}
code{background:var(--panel2);padding:1px 6px;border-radius:5px;font-size:12.5px;color:var(--text)}
pre{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:14px;overflow:auto;font-size:12.5px;line-height:1.6}
pre code{background:none;padding:0}

/* footer */
.foot{border-top:1px solid var(--line);padding:30px 0 40px}
.foot-in{display:flex;gap:32px;align-items:flex-start;justify-content:space-between;flex-wrap:wrap}
.foot p{max-width:760px;margin:0;font-size:12.5px;color:var(--muted)}

@media (max-width:1000px){
  .tester,.mc{grid-template-columns:1fr}
  .controls{position:static;max-height:none}
  .kpis{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .report{grid-template-columns:1fr 1fr}
  .guide{grid-template-columns:1fr}
}
@media (max-width:640px){
  .steps,.band,.report{grid-template-columns:1fr}
  .band div+div{padding-left:0;border-left:0;border-top:1px solid var(--line)}
  .hero{padding-top:64px}
  .tabs a{padding:7px 10px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}