:root{--bgA:#fff2dc;--bgB:#e6eeff;--bgC:#ffe4f1;--panel:rgba(255,255,255,.88);--ink:#15213a;--mute:#56668a;--line:#d3dbef;
--elastic:#2f6bff;--yield:#ffa800;--neck:#ff5a1f;--break:#e11d48;--pink:#e4007c;--teal:#00a896;--ok:#12805c;--warn:#b86e00;--bad:#d01a44;--acc:#2f6bff;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bgA:#1b1240;--bgB:#0c2552;--bgC:#34104a;--panel:rgba(24,30,64,.9);--ink:#eef2ff;--mute:#a4b2d6;--line:#33427a;
--elastic:#5b8cff;--yield:#ffc233;--neck:#ff7a45;--break:#ff4d78;--pink:#ff4fa8;--teal:#2ee6cf;--ok:#4cd9a0;--warn:#ffc233;--bad:#ff5c80;--acc:#5b8cff;color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);font:400 16px/1.5 Archivo,system-ui,Arial,sans-serif;background:linear-gradient(160deg,var(--bgA),var(--bgB) 50%,var(--bgC)) fixed;min-height:100vh}
main{max-width:780px;margin:0 auto;padding:20px 16px 120px}
.hero{display:flex;gap:16px;align-items:center;justify-content:space-between;margin-bottom:16px}
.hero svg{width:min(34%,220px);flex:none}
h1{font-size:clamp(30px,7vw,48px);line-height:1.02;margin:4px 0 8px;font-weight:800;letter-spacing:-.02em}
.lead{color:var(--mute);margin:0 0 12px;max-width:56ch}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.chips span{background:var(--c);color:#fff;font-weight:600;font-size:14px;padding:2px 12px;border-radius:99px;text-shadow:0 1px 1px rgba(0,0,0,.25)}
.panel{background:var(--panel);border:1px solid var(--line);border-left:7px solid var(--c,var(--acc));border-radius:12px;padding:14px;margin-bottom:12px;box-shadow:0 6px 18px rgba(47,107,255,.10)}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;font-weight:600}
.task{font-size:21px;font-weight:800;margin:8px 0}
.facts{color:var(--mute);margin:8px 0 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(112px,1fr));gap:8px}
.grid div{border:1px solid var(--line);border-radius:8px;padding:6px 10px;color:var(--mute);font-size:13px}
.grid div:nth-child(3n+1){border-top:3px solid var(--elastic)}.grid div:nth-child(3n+2){border-top:3px solid var(--yield)}.grid div:nth-child(3n){border-top:3px solid var(--pink)}
.grid b{display:block;color:var(--ink);font-size:17px}
canvas{width:100%;display:block}
#bar{height:100px}#plot{height:260px}
input[type=range]{width:100%;accent-color:var(--pink);margin:10px 0}
input[type=number]{font:inherit;width:110px;padding:6px;border-radius:8px;border:1px solid var(--line);background:var(--panel);color:var(--ink)}
select{font:inherit;padding:4px 6px;border-radius:6px;border:1px solid var(--line);background:var(--panel);color:var(--ink)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
button{font:inherit;font-weight:600;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--ink);padding:10px 14px;cursor:pointer}
button.main{background:linear-gradient(135deg,#2f6bff,#8a3ffc);border-color:transparent;color:#fff}
button.go{background:linear-gradient(135deg,#ff8a00,#e4007c);border-color:transparent;color:#fff;margin-left:auto}
button:disabled{opacity:.45;cursor:not-allowed}
button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--yield);outline-offset:2px}
[hidden]{display:none!important}
.read{display:flex;gap:22px;flex-wrap:wrap;margin:4px 0}
.read b{font-size:22px}
.state{font-weight:800}
.ok{color:var(--ok)}.warn{color:var(--warn)}.neck{color:var(--neck)}.bad{color:var(--bad)}
#result{white-space:pre-line;margin-top:0}
label{color:var(--mute);font-size:14px}
.spot{outline:4px solid var(--pink);outline-offset:5px;border-radius:12px}
.tour{position:fixed;left:50%;bottom:calc(14px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);width:min(92vw,520px);background:var(--ink);color:var(--bgB);border-radius:14px;padding:14px 16px;box-shadow:0 10px 30px rgba(0,0,0,.35);z-index:10}
.tour p{margin:0 0 10px}.tour span{margin-right:auto;font-size:13px;opacity:.8}
.tour button{padding:6px 12px}
@media (prefers-color-scheme:dark){.tour{background:#eef2ff;color:#15213a}}
@media (prefers-reduced-motion:no-preference){button{transition:filter .15s,transform .15s}button:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-1px)}}