:root { --ink:#173553;--navy:#12395f;--blue:#1762b7;--coral:#ef6c54;--ochre:#efb83d;--mint:#49a78d;--cream:#fff8e8;--metal:#d8d7cd;font-family:ui-rounded,"Avenir Next",system-ui,sans-serif; }
* { box-sizing:border-box; }
[hidden] { display:none!important; }
html,body { width:100%;height:100%;margin:0; }
body { min-width:1100px;min-height:720px;overflow:hidden;color:var(--ink);background:#e7e8e4; }
button { color:inherit;font:inherit; }
button:focus-visible,[tabindex]:focus-visible { outline:4px solid rgba(23,98,183,.36);outline-offset:4px; }
.lesson { position:relative;width:min(1300px,calc(100vw - 42px));height:min(856px,calc(100vh - 30px));margin:15px auto;display:grid;grid-template-columns:minmax(0,1fr) 300px;grid-template-rows:minmax(0,1fr) 112px;gap:14px; }
.factory { position:relative;min-width:0;padding:18px 23px 22px;display:grid;grid-template-rows:44px 75px minmax(0,1fr);border:9px solid #c7c8c2;border-radius:34px;background:#f2e8d0;box-shadow:0 24px 55px rgba(39,54,58,.18),inset 0 0 0 4px #f7f6ef;overflow:hidden;isolation:isolate; }
.factory>.scene-art { position:absolute;z-index:-2;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;pointer-events:none;user-select:none; }
.factory::after { position:absolute;z-index:-1;inset:0;content:"";pointer-events:none;background:rgba(255,250,235,.68);backdrop-filter:saturate(.86); }
.factory-head { display:grid;grid-template-columns:1fr auto 1fr;align-items:start; }
.factory-head>div:first-child { display:flex;flex-direction:column; }
.factory-head span,.mission span,.machine-dock>span,.source-rail span,.working-rail span,.result-bin span,.decision span,.finale span { color:#627383;font-size:12px;font-weight:950;letter-spacing:.11em;text-transform:uppercase; }
.factory-head strong { font-size:14px; }
.factory-head>button { justify-self:end;min-height:42px;padding:0 14px;border:0;border-radius:13px;background:#e0e1dc;font-weight:850;cursor:pointer; }
.pips { display:flex;gap:7px;padding-top:9px; }
.pips i { width:30px;height:7px;border-radius:99px;background:#d2d0c4; }
.pips i.on { background:var(--ochre); }.pips i.done { background:var(--mint); }
.mission { text-align:center; }
.mission h1 { margin:4px 0 3px;font-size:28px;line-height:1.05;letter-spacing:-.035em; }
.mission p { margin:0;color:#627383;font-size:13px;font-weight:650; }
.expression-bay { position:relative;min-height:0;padding:24px;display:grid;grid-template-rows:115px auto 110px minmax(0,1fr);gap:14px;border-radius:24px;background:linear-gradient(rgba(23,53,83,.045) 1px,transparent 1px),#e9e5d9;background-size:100% 34px;overflow:hidden; }
.source-rail,.working-rail { position:relative;display:grid;place-items:center;border:7px solid var(--navy);border-radius:22px;background:var(--cream);box-shadow:0 9px 0 #8e978f; }
.source-rail>span,.working-rail>span { position:absolute;left:15px;top:11px; }
.source-rail>strong { font-size:clamp(32px,4vw,53px);letter-spacing:.055em; }
.source-rail>i { position:absolute;right:14px;top:11px;padding:5px 8px;border-radius:8px;color:#fff;background:var(--navy);font-size:12px;font-style:normal;font-weight:950; }
.source-rail.is-drop-ready { border-color:var(--coral);box-shadow:0 9px 0 #8e978f,0 0 0 8px rgba(239,108,84,.22);transform:translateY(-2px); }
.machine-slot { position:absolute;z-index:5;right:12px;bottom:8px;min-width:150px;min-height:46px;padding:7px 11px;display:flex;flex-direction:column;justify-content:center;border:3px dashed #ef6c54;border-radius:12px;color:#173553;background:#fff1bc;text-align:center;transition:transform .14s,box-shadow .14s; }
.machine-slot b { font-size:10px;letter-spacing:.08em; }.machine-slot small { font-size:9px;font-weight:800; }
.machine-slot.is-drop-ready { transform:scale(1.06);box-shadow:0 0 0 7px rgba(239,108,84,.2);background:#ffd880; }
.operation-targets { position:absolute;left:50%;bottom:8px;display:flex;gap:8px;transform:translateX(-50%);pointer-events:none; }
.operation-targets i { min-width:28px;padding:3px 8px;border-radius:7px;color:#fff;background:rgba(18,57,95,.66);font-size:11px;font-style:normal;font-weight:950;text-align:center; }
.operation-targets i.is-loaded { color:#173553;background:var(--ochre);box-shadow:0 0 0 4px rgba(239,184,61,.25); }
.working-rail { min-height:105px;border-width:4px;border-color:#81a9b0;background:#f5fbf8;box-shadow:0 6px 0 #a6bbb6; }
.working-rail>strong { font-size:30px;letter-spacing:.04em; }
.group-route { justify-self:center;min-width:360px;padding:9px 18px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;border-radius:17px;color:#fff;background:var(--coral);box-shadow:0 7px 0 #a94334;text-align:center; }
.group-route b { font-size:38px;line-height:1; }.group-route span { font-weight:950; }.group-route small { grid-column:1/-1;font-weight:750; }
.trace-cards { min-height:0;display:flex;gap:10px;align-items:flex-start;overflow:auto;padding:5px 2px; }
.trace-card { min-width:180px;padding:12px 14px;border-left:6px solid var(--coral);border-radius:12px;background:#fff;box-shadow:0 5px 0 #c6c9c2; }
.trace-card span { display:block;color:#71808a;font-size:12px;font-weight:900;text-transform:uppercase; }.trace-card strong { display:block;margin-top:5px;font-size:15px; }
.target-rack { grid-row:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:13px;align-items:center;padding:55px 15px 20px; }
.target-rack::before { position:absolute;left:50%;top:15px;content:"TARGET 18 · SOLVE TWO DIFFERENT LINES";color:var(--mint);font-size:13px;font-weight:1000;letter-spacing:.1em;transform:translateX(-50%); }
.target-rack button { min-height:190px;padding:22px;border:4px solid transparent;border-radius:22px;background:var(--cream);box-shadow:0 9px 0 #b7b3a7;font-size:25px;font-weight:950;cursor:pointer; }
.target-rack button.solved { border-color:var(--mint);background:#e9f8f1;box-shadow:0 9px 0 #2f806d; }
.target-rack button.selected { border-color:var(--ochre);background:#fff1bc; }
.target-rack button:disabled { cursor:default;opacity:.78; }
.target-rack button span { display:block;margin-top:18px;color:#596b78;font-size:12px;line-height:1.45; }
.expression-bay.target-mode { grid-template-rows:82px 104px 84px minmax(80px,1fr);gap:9px;padding:13px 18px; }
.target-mode .target-rack { grid-row:1;display:grid;grid-template-columns:repeat(3,1fr);gap:9px;padding:0; }
.target-mode .target-rack::before { display:none; }
.target-mode .target-rack button { min-height:72px;padding:9px 12px;font-size:17px;box-shadow:0 5px 0 #b7b3a7; }
.target-mode .target-rack button span { margin-top:5px;font-size:10px; }
.target-mode .source-rail { grid-row:2; }.target-mode .working-rail { grid-row:3;min-height:80px; }.target-mode .trace-cards { grid-row:4; }
.target-mode .source-rail>strong { font-size:30px; }.target-mode .machine-slot { min-width:132px;min-height:40px; }
.machine-dock { padding:22px;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;gap:14px;border-radius:30px;color:#fff;background:var(--navy);box-shadow:0 20px 45px rgba(18,57,95,.24); }
.factory-crank { min-height:78px;display:grid;grid-template-columns:50px 1fr;grid-template-rows:1fr 1fr;align-items:center;padding:10px 14px;border:0;border-radius:18px;color:#fff;background:#1d466b;text-align:left;cursor:not-allowed; }
.factory-crank i { grid-row:1/3;width:22px;height:48px;border:7px solid #efb83d;border-radius:14px;background:#ef6c54;transform:rotate(-24deg);transform-origin:bottom;transition:transform .15s ease; }
.factory-crank b { align-self:end;font-size:13px; }.factory-crank small { align-self:start;color:#a9bfcd; }
.factory-crank.is-ready { background:#1762b7;cursor:pointer;box-shadow:0 6px 0 #0d4488; }.factory-crank.is-ready i { transform:rotate(24deg);animation:lever-wiggle .7s ease-in-out infinite; }
.machine-ghost { position:fixed;z-index:1000;min-width:150px;padding:16px;border:5px solid #fff;border-radius:20px;color:#fff;background:#ef6c54;box-shadow:0 18px 40px rgba(18,40,66,.36);font:900 15px ui-rounded,"Avenir Next",sans-serif;pointer-events:none;transform:translate(-50%,-50%) rotate(-5deg); }
.machine-ghost b { display:block;color:#fff0a8;font-size:32px; }
.machine-dock>span { color:#9eb1bf; }
#machines { display:grid;grid-template-columns:1fr 1fr;gap:10px;align-content:start; }
#machines button { min-height:82px;padding:10px;border:3px solid transparent;border-radius:18px;color:#fff;background:#234d73;font-size:15px;font-weight:900;cursor:pointer; }
#machines button b { display:block;margin-bottom:5px;color:#ffd880;font-size:29px;line-height:1; }
#machines button:hover { border-color:#8bb7ca;transform:translateY(-2px); }
.rank-card { padding:15px;border-radius:17px;background:#1d466b; }
.rank-card strong { font-size:13px; }.rank-card ol { margin:9px 0 0;padding-left:20px;color:#bfd0da;font-size:12px;font-weight:750;line-height:1.65; }
.result-bin { padding:15px;border-radius:17px;background:#0d2d4c;text-align:center; }.result-bin span { color:#9eb1bf; }.result-bin strong { display:block;margin-top:3px;color:#9ce5ce;font-size:29px; }
.decision { grid-column:1/-1;display:grid;grid-template-columns:1fr 1.6fr;align-items:center;gap:24px;padding:19px 28px;border-radius:26px;background:var(--cream);box-shadow:0 12px 30px rgba(44,53,48,.12); }
.decision>div:first-child { display:flex;flex-direction:column;gap:5px; }.decision>div:first-child strong { font-size:17px; }
.actions { display:flex;justify-content:flex-end;gap:9px;flex-wrap:wrap; }.actions button,.finale button { min-height:52px;padding:11px 17px;border:0;border-radius:15px;background:#dfe6e2;font-weight:900;cursor:pointer; }.actions .primary,.finale button { color:#fff;background:var(--blue);box-shadow:0 5px 0 #0d4488; }
.finale { position:absolute;z-index:30;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px;border-radius:34px;color:#fff;background:rgba(18,57,95,.98);text-align:center; }.finale span { color:#a8e7d7; }.finale strong { margin:10px 0 22px;font-size:36px; }
.sr-only { position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0); }.is-pointed { animation:point .7s ease-out 2; }
@keyframes point { 50% { filter:drop-shadow(0 0 12px var(--ochre)); } }
@keyframes lever-wiggle { 50% { transform:rotate(10deg); } }
@media(max-width:1180px){.lesson{grid-template-columns:minmax(0,1fr) 270px}.factory{padding-inline:16px}.target-rack button{font-size:21px}}
@media(max-width:1099px),(max-height:719px){body{min-width:0;overflow:auto}.lesson{width:min(100% - 24px,900px);height:auto;min-height:calc(100vh - 24px);margin:12px auto;grid-template-columns:1fr;grid-template-rows:minmax(700px,78vh) auto auto}.machine-dock{grid-template-columns:180px 1fr 1fr;grid-template-rows:auto}.decision{grid-column:1}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}