:root{color-scheme:dark;--bg:#0b0d0f;--panel:#14181b;--panel2:#1b2024;--ink:#f4f6f3;--muted:#a5afb5;--cyan:#55e5d9;--yellow:#f4dc67;--coral:#ff786b;--line:#343b40;--r:6px;font-family:Geist,"Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);letter-spacing:0}button,input,select{font:inherit}button,input,select,summary{outline-offset:3px}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--cyan)}main{width:100%;max-width:100%;overflow-x:hidden}nav{height:66px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:0 clamp(20px,4vw,64px);position:sticky;top:0;background:rgba(11,13,15,.96);z-index:10}.brand{color:var(--ink);font-weight:800;text-decoration:none;letter-spacing:0}.sample-dot{margin-left:auto;color:var(--muted);font-size:13px}.sample-dot i{display:inline-block;width:8px;height:8px;background:var(--cyan);border-radius:50%;margin-right:7px}.icon-button{width:38px;height:38px;border:1px solid var(--line);background:transparent;color:var(--ink);font-size:20px;cursor:pointer}.intro{max-width:1440px;margin:auto;padding:70px clamp(20px,4vw,64px) 44px;display:grid;grid-template-columns:2fr 1fr;gap:60px;align-items:end}.kicker{font-size:12px;font-weight:800;color:var(--cyan);margin:0 0 14px;text-transform:uppercase}.intro h1{font-size:clamp(44px,6.3vw,96px);line-height:.94;margin:0;max-width:72rem;letter-spacing:0}.intro h1 span{color:var(--muted)}.intro-copy{color:var(--muted);font-size:17px;line-height:1.6;max-width:480px;margin:0}.workbench{max-width:1440px;margin:auto;padding:0 clamp(20px,4vw,64px) 110px;display:grid;grid-template-columns:4fr 8fr;grid-auto-flow:dense;gap:12px}.controls,.results{border:1px solid var(--line);background:var(--panel);border-radius:var(--r)}.controls{padding:24px;display:grid;gap:23px}.panel-head,.pressure-labels,.section-head{display:flex;justify-content:space-between;align-items:center;gap:16px}.panel-head h2{font-size:19px;margin:0}.panel-head output{color:var(--yellow);font-weight:800}.controls>label{display:grid;gap:10px;color:var(--muted);font-size:14px}.controls label strong{color:var(--ink);float:right}.controls input[type=range]{width:100%;accent-color:var(--cyan)}select,input[type=text],#scenarioName{background:var(--panel2);border:1px solid var(--line);color:var(--ink);padding:11px;border-radius:4px;min-width:0}fieldset{border:0;padding:0;margin:0}legend{color:var(--muted);font-size:14px;margin-bottom:10px}.segments{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}.segments input{position:absolute;opacity:0}.segments span{display:block;text-align:center;padding:10px 5px;background:var(--panel2);border:1px solid var(--line);font-size:12px;cursor:pointer}.segments input:checked+span{background:var(--cyan);color:#07110f;border-color:var(--cyan);font-weight:800}.checks{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.checks label,.checklist label{color:var(--ink);font-size:14px}.checks input,.checklist input{accent-color:var(--cyan)}details{border-top:1px solid var(--line);padding-top:16px;color:var(--muted);font-size:13px}details p{line-height:1.5}.results{padding:32px;display:grid;grid-template-rows:auto 1fr auto;min-width:0}.result-top{display:flex;justify-content:space-between;gap:20px}.result-top h2{font-size:clamp(30px,4vw,54px);margin:0 0 12px}.result-top p:last-child{max-width:650px;color:var(--muted);line-height:1.5}.load{text-align:right}.load strong{font-size:72px;line-height:1;color:var(--yellow)}.load span{display:block;color:var(--muted);font-size:13px}.pressure{align-self:center;padding:32px 0}.pressure-labels strong{font-size:20px}.pressure-track{height:30px;background:#252b2f;position:relative;margin:16px 0}.pressure-track i{display:block;height:100%;width:42%;background:var(--cyan);transition:width .35s ease,background .35s ease}.pressure-track b{position:absolute;left:60%;top:-7px;width:2px;height:44px;background:var(--ink)}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}.metrics span{background:var(--panel);padding:18px;color:var(--muted)}.metrics strong{display:block;color:var(--ink);font-size:22px;margin-top:6px}.next{border-left:3px solid var(--cyan);padding:12px 18px;background:var(--panel2)}.next p{margin:5px 0 0;color:var(--muted);line-height:1.45}.routes{padding:110px max(clamp(20px,4vw,64px),calc((100vw - 1440px)/2 + 64px));background:#f0f2ee;color:#101315}.section-head{align-items:end;margin-bottom:35px}.section-head h2,.evidence h2,.action h2{font-size:clamp(32px,4vw,58px);margin:0}.section-head>p{max-width:440px;color:#5f686d}.route-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-flow:dense;gap:10px}.lane{border:1px solid #c9ceca;background:#fff;border-radius:var(--r);min-height:340px;padding:18px}.lane h3{display:flex;justify-content:space-between;margin:0 0 18px;font-size:18px}.lane h3 span{font-size:12px;padding:4px 7px;background:#e7ebe8}.event{border-top:1px solid #d9ddda;padding:15px 0}.event strong{display:block}.event small{color:#697277;display:block;margin-top:5px}.event .why{font-size:12px;line-height:1.4;color:#4b555a;margin:8px 0 0}.evidence{max-width:1440px;margin:auto;padding:130px clamp(20px,4vw,64px);display:grid;grid-template-columns:7fr 5fr;gap:80px}.evidence>div>p:last-child{max-width:600px;color:var(--muted);line-height:1.6}.checklist{display:grid;gap:2px;align-content:center}.checklist label{padding:18px;background:var(--panel);border-left:3px solid var(--line)}.checklist label:has(input:checked){border-left-color:var(--cyan);color:var(--cyan)}.action{background:var(--yellow);color:#131512;padding:100px max(clamp(20px,4vw,64px),calc((100vw - 1440px)/2 + 64px));display:grid;grid-template-columns:1fr 1fr;gap:70px}.action .kicker{color:#403800}.action p{line-height:1.5}.action-controls{display:grid;gap:14px}.action-controls>label{display:grid;gap:7px;font-weight:700}.action-controls input,.action-controls select{background:#fff;color:#111;border-color:#8b7d32}.buttons{display:flex;flex-wrap:wrap;gap:8px}button{border:1px solid #111;background:#111;color:#fff;padding:12px 16px;border-radius:4px;font-weight:800;cursor:pointer}button.secondary{background:transparent;color:#111}button.danger{background:#8b211b;border-color:#8b211b}footer{padding:28px clamp(20px,4vw,64px);display:flex;justify-content:space-between;color:var(--muted);font-size:13px}#toast{position:fixed;right:24px;bottom:24px;padding:14px 18px;background:var(--cyan);color:#07110f;font-weight:800;border-radius:4px;transform:translateY(120px);opacity:0;transition:.25s;z-index:20}#toast.show{transform:none;opacity:1}
@media(max-width:820px){nav{padding:0 16px}.sample-dot{display:none}.intro{grid-template-columns:1fr;padding-top:48px;gap:26px}.intro h1{font-size:48px}.workbench{grid-template-columns:1fr;padding-bottom:70px}.results{padding:22px}.result-top{display:grid}.load{text-align:left}.load strong{font-size:58px}.metrics{grid-template-columns:1fr}.route-grid{grid-template-columns:1fr}.section-head{display:grid}.evidence,.action{grid-template-columns:1fr;gap:35px;padding-top:80px;padding-bottom:80px}.segments{grid-template-columns:1fr}.buttons button{flex:1 1 140px}footer{display:grid;gap:8px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}