:root{
  --bg:#f4f8ff;--bg2:#eaf3ff;--panel:#fff;--panel-glass:rgba(255,255,255,.9);--panel-soft:#edf5ff;
  --text:#17213a;--muted:#64748b;--primary:#2563eb;--primary2:#06b6d4;--accent:#7c3aed;--pink:#ec4899;
  --green:#059669;--yellow:#f59e0b;--red:#dc2626;--orange:#f97316;--line:rgba(23,33,58,.12);--line-strong:rgba(37,99,235,.27);
  --shadow:0 22px 65px rgba(45,71,110,.13);--shadow-sm:0 9px 28px rgba(45,71,110,.1);--canvas:#f9fbff;--grid:rgba(37,99,235,.065);--topbar:rgba(255,255,255,.84)
}
body[data-vehicle="bike"]{--primary:#f97316;--primary2:#ef4444;--accent:#db2777;--line-strong:rgba(249,115,22,.3);--grid:rgba(249,115,22,.07)}
[data-theme="dark"]{
  --bg:#07101d;--bg2:#0a192b;--panel:#0e1b2e;--panel-glass:rgba(14,27,46,.9);--panel-soft:#11243d;
  --text:#edf6ff;--muted:#9fb3c8;--primary:#60a5fa;--primary2:#22d3ee;--accent:#a78bfa;--pink:#f472b6;
  --green:#34d399;--yellow:#fbbf24;--red:#fb7185;--orange:#fb923c;--line:rgba(255,255,255,.105);--line-strong:rgba(96,165,250,.33);
  --shadow:0 24px 70px rgba(0,0,0,.38);--shadow-sm:0 10px 30px rgba(0,0,0,.27);--canvas:#081625;--grid:rgba(96,165,250,.07);--topbar:rgba(9,21,36,.84)
}
[data-theme="dark"] body[data-vehicle="bike"],body[data-vehicle="bike"][data-theme="dark"]{--primary:#fb923c;--primary2:#fb7185;--line-strong:rgba(251,146,60,.34);--grid:rgba(251,146,60,.075)}
[hidden]{display:none!important}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 10% 0%,color-mix(in srgb,var(--primary) 14%,transparent),transparent 27%),radial-gradient(circle at 92% 8%,color-mix(in srgb,var(--primary2) 13%,transparent),transparent 26%),linear-gradient(155deg,var(--bg),var(--bg2) 48%,var(--bg));transition:background .25s,color .25s}body.reduce-motion *,body.reduce-motion *::before,body.reduce-motion *::after{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.001ms!important}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--primary) 52%,transparent);outline-offset:2px}.shell{width:min(1360px,calc(100% - 28px));margin:0 auto;padding:20px 0 72px}.topbar-wrap{position:sticky;top:0;z-index:80;padding:10px 14px 0;pointer-events:none}.topbar{width:min(1360px,100%);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:11px 13px;border:1px solid var(--line);border-radius:20px;background:var(--topbar);backdrop-filter:blur(18px);box-shadow:var(--shadow-sm);pointer-events:auto}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;min-width:230px}.brand-mark{width:43px;height:43px;border-radius:14px;display:grid;place-items:center;color:#fff;font-weight:950;background:linear-gradient(135deg,var(--primary),var(--primary2));box-shadow:0 9px 24px color-mix(in srgb,var(--primary) 28%,transparent)}.brand strong{display:block;font-size:1.03rem}.brand small{display:block;color:var(--muted);font-size:.7rem;margin-top:2px}.nav-links{display:flex;align-items:center;justify-content:center;gap:3px;flex-wrap:wrap}.nav-links a{text-decoration:none;color:var(--muted);font-size:.77rem;font-weight:750;padding:8px;border-radius:10px}.nav-links a:hover{color:var(--text);background:var(--panel-soft)}.top-actions{display:flex;align-items:center;justify-content:flex-end;gap:7px}.xp-pill,.level-pill{border:1px solid var(--line);background:var(--panel-soft);padding:8px 10px;border-radius:999px;font-size:.76rem;white-space:nowrap}.icon-btn{width:39px;height:39px;border:1px solid var(--line);border-radius:12px;display:grid;place-items:center;color:var(--text);background:var(--panel-soft);transition:.18s}.icon-btn:hover{transform:translateY(-2px);border-color:var(--line-strong)}.hero{display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:34px;padding:68px 12px 38px}.eyebrow{display:inline-block;color:var(--primary);font-size:.77rem;font-weight:900;letter-spacing:.14em;text-transform:uppercase}.hero h1{margin:13px 0 18px;font-size:clamp(2.7rem,6vw,5.8rem);line-height:.94;letter-spacing:-.06em;max-width:850px}.hero h1 span{background:linear-gradient(90deg,var(--primary),var(--primary2),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-copy>p{margin:0;color:var(--muted);font-size:1.08rem;line-height:1.76;max-width:780px}.hero-actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:25px}.btn{border:1px solid var(--line);border-radius:13px;padding:11px 15px;color:var(--text);background:var(--panel);font-weight:850;transition:.18s;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.btn.primary{color:#fff;border-color:transparent;background:linear-gradient(135deg,var(--primary),var(--primary2))}.btn.bike-btn{color:#fff;border:0;background:linear-gradient(135deg,#f97316,#ef4444)}.btn.secondary{background:var(--panel-soft)}.btn.danger{color:var(--red);background:color-mix(in srgb,var(--red) 8%,var(--panel));border-color:color-mix(in srgb,var(--red) 25%,var(--line))}.btn.tiny{padding:7px 10px;font-size:.76rem;border-radius:10px}.btn.full{width:100%}.daily-challenge{margin-top:24px;display:grid;grid-template-columns:auto 1fr auto;gap:11px;align-items:center;max-width:710px;padding:12px 13px;border:1px solid color-mix(in srgb,var(--yellow) 32%,var(--line));border-radius:15px;background:color-mix(in srgb,var(--yellow) 8%,var(--panel-glass));box-shadow:var(--shadow-sm)}.daily-icon{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:color-mix(in srgb,var(--yellow) 17%,var(--panel))}.daily-challenge small{display:block;color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em}.daily-challenge strong{display:block;margin-top:3px;font-size:.9rem}.hero-garage{min-height:390px;position:relative;display:grid;place-items:center;overflow:hidden}.hero-machine{width:100%;max-width:640px;filter:drop-shadow(0 24px 28px rgba(0,0,0,.18))}.hero-wheel{fill:#15213b;stroke:var(--panel);stroke-width:8}.hero-wheel,.energy-line{transform-box:fill-box;transform-origin:center}.hero-wheel{animation:wheelSpin 5s linear infinite}.energy-line{stroke:var(--yellow);stroke-width:8;stroke-linecap:round;stroke-dasharray:14 12;animation:dash 1.2s linear infinite}@keyframes wheelSpin{to{transform:rotate(360deg)}}@keyframes dash{to{stroke-dashoffset:-52}}.formula-chip{position:absolute;z-index:4;padding:8px 11px;border:1px solid var(--line);border-radius:12px;background:var(--panel-glass);box-shadow:var(--shadow-sm);color:var(--primary);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:800;font-size:.76rem;animation:floatChip 3.2s ease-in-out infinite}.chip-one{top:30px;left:6px}.chip-two{top:92px;right:4px;animation-delay:.5s}.chip-three{bottom:32px;left:76px;animation-delay:1s}@keyframes floatChip{50%{transform:translateY(-7px)}}.progress-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:11px;margin:5px 0 24px}.progress-strip article{padding:15px;border:1px solid var(--line);border-radius:17px;background:var(--panel-glass);box-shadow:var(--shadow-sm)}.progress-strip span{display:block;color:var(--muted);font-size:.72rem}.progress-strip strong{display:block;font-size:1.5rem;margin:4px 0}.progress-strip small{display:block;color:var(--muted);font-size:.7rem;line-height:1.35}.card,.card-soft{border:1px solid var(--line);background:var(--panel-glass);box-shadow:var(--shadow);border-radius:22px}.card-soft{box-shadow:var(--shadow-sm)}.safety-banner{display:grid;grid-template-columns:auto 1fr;gap:13px;align-items:start;padding:15px 16px;border-color:color-mix(in srgb,var(--red) 26%,var(--line));background:color-mix(in srgb,var(--red) 5%,var(--panel-glass))}.safety-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:color-mix(in srgb,var(--red) 12%,var(--panel))}.safety-banner p{margin:4px 0 0;color:var(--muted);line-height:1.58}.section{margin-top:34px;scroll-margin-top:92px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:18px;margin-bottom:16px;padding:0 2px}.section-heading h2{margin:6px 0 0;font-size:clamp(1.75rem,3vw,2.45rem);letter-spacing:-.035em}.section-heading h3{margin:0}.section-heading p{margin:7px 0 0;color:var(--muted);line-height:1.58;max-width:880px}.section-heading.compact{margin-top:0}.section-actions{display:flex;gap:8px;flex-wrap:wrap}.portal-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.portal-card{text-align:left;border:1px solid var(--line);border-radius:25px;padding:24px;background:var(--panel-glass);box-shadow:var(--shadow);color:var(--text);transition:.2s;position:relative;overflow:hidden}.portal-card::after{content:"";position:absolute;width:240px;height:240px;border-radius:50%;right:-100px;top:-100px;opacity:.13;background:currentColor}.portal-card:hover{transform:translateY(-5px);border-color:var(--line-strong)}.portal-card.car-portal{color:#2563eb}.portal-card.bike-portal{color:#f97316}.portal-card>*{position:relative;z-index:1}.portal-art{display:block;font-size:3.1rem}.portal-kicker{display:block;margin-top:14px;text-transform:uppercase;letter-spacing:.1em;font-size:.72rem;font-weight:900}.portal-card>strong{display:block;color:var(--text);font-size:2rem;margin:5px 0 8px}.portal-card p{color:var(--muted);line-height:1.62;max-width:600px}.portal-stats{display:block;color:var(--text);font-size:.85rem;margin-top:14px}.forge-portal{padding-top:10px}.portal-switch{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;padding:10px;align-items:center;position:sticky;top:82px;z-index:30}.portal-switch button{border:1px solid var(--line);border-radius:15px;background:var(--panel);color:var(--muted);padding:12px;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:10px;text-align:left}.portal-switch button>span{grid-row:1/3;font-size:1.55rem}.portal-switch button b{color:var(--text)}.portal-switch button small{font-size:.7rem}.portal-switch button.active{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2));border-color:transparent}.portal-switch button.active b,.portal-switch button.active small{color:#fff}.portal-switch-divider{color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em}.forge-intro{margin-top:16px;padding:26px;display:flex;justify-content:space-between;gap:24px;align-items:center;overflow:hidden;position:relative}.forge-intro::after{content:"";position:absolute;width:360px;height:360px;border-radius:50%;right:-170px;top:-170px;background:color-mix(in srgb,var(--primary) 10%,transparent)}.forge-intro-copy{position:relative;z-index:1}.forge-intro h2{font-size:clamp(2rem,4vw,3.5rem);margin:8px 0 10px;letter-spacing:-.04em}.forge-intro p{color:var(--muted);line-height:1.65;max-width:850px}.forge-stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.forge-stats span{padding:8px 10px;border:1px solid var(--line);border-radius:999px;background:var(--panel-soft);font-size:.78rem}.forge-badge{font-size:6rem;position:relative;z-index:1;filter:drop-shadow(0 12px 20px rgba(0,0,0,.16))}.confidence-key{display:flex;gap:7px;flex-wrap:wrap}.confidence{display:inline-flex;align-items:center;gap:5px;padding:6px 9px;border-radius:999px;border:1px solid var(--line);font-size:.71rem;font-weight:850;white-space:nowrap;color:var(--muted)}.confidence.verified{color:var(--green);background:color-mix(in srgb,var(--green) 7%,var(--panel));border-color:color-mix(in srgb,var(--green) 30%,var(--line))}.confidence.simplified{color:var(--yellow);background:color-mix(in srgb,var(--yellow) 8%,var(--panel));border-color:color-mix(in srgb,var(--yellow) 30%,var(--line))}.confidence.theoretical{color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--panel));border-color:color-mix(in srgb,var(--accent) 30%,var(--line))}.machine-layout{display:grid;grid-template-columns:290px 1fr;gap:17px;align-items:start}.system-browser{padding:14px;position:sticky;top:150px}.search-box{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel-soft);border-radius:12px;padding:9px 11px}.search-box input{border:0;outline:0;background:transparent;color:var(--text);width:100%;min-width:0}.search-box.large{min-height:44px}.system-list{display:grid;gap:6px;margin-top:12px;max-height:570px;overflow:auto}.system-list button{border:1px solid transparent;background:transparent;color:var(--muted);border-radius:12px;text-align:left;padding:10px 11px;display:flex;justify-content:space-between;gap:8px}.system-list button:hover{background:var(--panel-soft);color:var(--text)}.system-list button.active{background:color-mix(in srgb,var(--primary) 10%,var(--panel));border-color:var(--line-strong);color:var(--primary);font-weight:850}.system-list small{font-size:.68rem}.machine-stage{padding:18px}.machine-stage-head{display:flex;justify-content:space-between;gap:12px;align-items:start}.machine-stage-head small{color:var(--primary);font-weight:850}.machine-stage-head h3{margin:4px 0 0}.vehicle-map{position:relative;min-height:560px;margin-top:12px;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px),var(--canvas);background-size:26px 26px}.vehicle-map svg{width:100%;height:100%;min-height:560px;display:block}.hotspot{position:absolute;transform:translate(-50%,-50%);width:34px;height:34px;border:3px solid var(--panel);border-radius:50%;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2));font-size:.74rem;font-weight:950;box-shadow:0 0 0 7px color-mix(in srgb,var(--primary) 12%,transparent),0 8px 22px rgba(0,0,0,.24);animation:hotspotPulse 2s ease-in-out infinite}.hotspot:hover{transform:translate(-50%,-50%) scale(1.15);z-index:4}.hotspot.hidden-system{opacity:.16;pointer-events:none;animation:none}.hotspot-label{position:absolute;transform:translate(-50%,18px);font-size:.68rem;color:var(--text);background:var(--panel-glass);border:1px solid var(--line);border-radius:8px;padding:4px 6px;white-space:nowrap;box-shadow:var(--shadow-sm);pointer-events:none}@keyframes hotspotPulse{50%{box-shadow:0 0 0 12px color-mix(in srgb,var(--primary) 5%,transparent),0 8px 22px rgba(0,0,0,.24)}}.machine-map-footer{display:flex;justify-content:space-between;gap:10px;margin-top:10px;color:var(--muted);font-size:.78rem}.component-tools,.theory-tools,.diagnostic-tools{padding:12px;display:grid;grid-template-columns:minmax(280px,1fr) repeat(3,minmax(150px,auto));gap:9px;align-items:center}.component-tools select,.diagnostic-tools select,.full-select,.speed-select select{border:1px solid var(--line);background:var(--panel-soft);color:var(--text);border-radius:11px;padding:10px}.library-status{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:12px 2px;color:var(--muted);font-size:.82rem}.text-btn{border:0;background:transparent;color:var(--primary);font-weight:850;padding:5px}.component-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:11px}.component-card{border:1px solid var(--line);border-radius:17px;background:var(--panel-glass);box-shadow:var(--shadow-sm);padding:14px;text-align:left;color:var(--text);transition:.18s;display:flex;flex-direction:column;min-height:236px}.component-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}.component-card-top{display:flex;justify-content:space-between;gap:8px;align-items:start}.component-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:color-mix(in srgb,var(--primary) 11%,var(--panel));font-size:1.25rem}.risk-dot{font-size:.66rem;padding:5px 7px;border-radius:999px;background:var(--panel-soft);color:var(--muted);border:1px solid var(--line)}.risk-dot.high{color:var(--red);border-color:color-mix(in srgb,var(--red) 30%,var(--line))}.component-card h3{font-size:1rem;margin:12px 0 5px}.component-card .system-name{color:var(--primary);font-size:.7rem;font-weight:850}.component-card p{color:var(--muted);font-size:.8rem;line-height:1.48;margin:8px 0;flex:1}.component-card footer{display:flex;justify-content:space-between;gap:7px;color:var(--muted);font-size:.68rem;border-top:1px solid var(--line);padding-top:9px}.load-more-wrap{text-align:center;margin-top:15px}.lab-app{display:grid;grid-template-columns:330px 1fr;gap:16px;align-items:start}.lab-browser{position:sticky;top:148px;overflow:hidden}.lab-browser-head{padding:13px;border-bottom:1px solid var(--line)}.lab-filter-row,.theory-filters{display:flex;gap:6px;flex-wrap:wrap;margin-top:9px}.filter-chip{border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--muted);padding:6px 8px;font-size:.67rem}.filter-chip.active{color:#fff;border-color:transparent;background:var(--primary)}.lab-list{max-height:720px;overflow:auto;padding:9px}.lab-item{width:100%;border:1px solid transparent;border-radius:13px;background:transparent;color:var(--muted);padding:10px;display:grid;grid-template-columns:37px 1fr auto;gap:9px;align-items:center;text-align:left;margin-bottom:4px}.lab-item:hover{background:var(--panel-soft);color:var(--text)}.lab-item.active{background:color-mix(in srgb,var(--primary) 10%,var(--panel));border-color:var(--line-strong);color:var(--text)}.lab-item-icon{width:37px;height:37px;border-radius:11px;display:grid;place-items:center;background:var(--panel-soft)}.lab-item.active .lab-item-icon{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2))}.lab-item strong{display:block;font-size:.82rem}.lab-item small{display:block;font-size:.66rem;margin-top:2px}.lab-item .fav{color:var(--yellow)}.workspace{overflow:hidden}.workspace-head{padding:18px;display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line)}.workspace-title-wrap{display:flex;gap:12px;align-items:flex-start}.workspace-icon{width:50px;height:50px;border-radius:15px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2));font-size:1.5rem}.workspace-meta{display:flex;gap:7px;flex-wrap:wrap;color:var(--primary);font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;font-weight:850}.workspace h3{margin:5px 0 4px}.workspace-head p{margin:0;color:var(--muted);font-size:.83rem;line-height:1.45}.workspace-badges{display:flex;gap:7px;align-items:start}.experiment-guide{display:flex;align-items:center;gap:8px;padding:10px 18px;border-bottom:1px solid var(--line);background:var(--panel-soft);color:var(--muted);font-size:.72rem}.experiment-guide span{display:flex;gap:5px;align-items:center}.experiment-guide b{width:21px;height:21px;border-radius:50%;display:grid;place-items:center;background:var(--panel);color:var(--primary)}.experiment-guide i{height:1px;flex:1;background:var(--line)}.workspace-grid{display:grid;grid-template-columns:300px 1fr;gap:14px;padding:15px}.control-panel{border:1px solid var(--line);border-radius:16px;background:var(--panel);padding:13px}.panel-title{display:flex;justify-content:space-between;gap:8px;margin-bottom:12px}.control{margin-bottom:13px}.control-head{display:flex;justify-content:space-between;gap:8px;margin-bottom:6px;font-size:.75rem}.control-head span{color:var(--muted)}.control-head strong{color:var(--primary);text-align:right}input[type=range]{width:100%;accent-color:var(--primary)}.control select{width:100%;border:1px solid var(--line);border-radius:10px;background:var(--panel-soft);color:var(--text);padding:9px}.simulation-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}.speed-select{grid-column:1/3;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:.75rem}.speed-select select{padding:7px}.canvas-shell{position:relative;border:1px solid var(--line);border-radius:17px;overflow:hidden;background:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px),var(--canvas);background-size:24px 24px;min-height:440px}.canvas-shell canvas{display:block;width:100%;height:440px}.canvas-status{position:absolute;left:12px;top:12px;padding:6px 9px;border:1px solid var(--line);border-radius:999px;background:var(--panel-glass);font-size:.69rem;color:var(--muted)}.canvas-fullscreen{position:absolute;right:12px;top:12px;width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:var(--panel-glass);color:var(--text)}.canvas-hint{position:absolute;left:50%;bottom:10px;transform:translateX(-50%);font-size:.67rem;color:var(--muted);background:var(--panel-glass);padding:5px 8px;border-radius:999px;white-space:nowrap}.readout-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:9px}.readout{border:1px solid var(--line);border-radius:12px;background:var(--panel-soft);padding:9px;min-width:0}.readout span{display:block;color:var(--muted);font-size:.65rem}.readout strong{display:block;margin-top:3px;font-size:.8rem;overflow-wrap:anywhere}.learning-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:0 15px 15px}.prediction-card,.mission-card{border:1px solid var(--line);border-radius:16px;padding:14px;background:var(--panel)}.mini-label{font-size:.65rem;color:var(--primary);font-weight:900;text-transform:uppercase;letter-spacing:.08em}.prediction-card h4,.mission-card h4{margin:6px 0}.prediction-card textarea{width:100%;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:9px;background:var(--panel-soft);color:var(--text);margin:5px 0}.feedback{color:var(--muted);font-size:.76rem;line-height:1.45;min-height:18px}.mission-card p{color:var(--muted);font-size:.8rem;line-height:1.48}.mission-bottom{display:flex;justify-content:space-between;gap:8px;color:var(--yellow);font-size:.76rem}.mission-card.complete{border-color:color-mix(in srgb,var(--green) 35%,var(--line));background:color-mix(in srgb,var(--green) 5%,var(--panel))}.explanation-tabs{display:flex;gap:5px;flex-wrap:wrap;padding:0 15px}.explanation-tab{border:1px solid var(--line);border-radius:10px 10px 0 0;background:var(--panel-soft);color:var(--muted);padding:8px 10px}.explanation-tab.active{background:var(--primary);color:#fff;border-color:transparent}.explanation-panel{margin:0 15px;border:1px solid var(--line);border-radius:0 15px 15px 15px;padding:14px;color:var(--muted);line-height:1.65;background:var(--panel)}.formula-box{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--primary);border:1px solid var(--line);background:var(--panel-soft);border-radius:12px;padding:10px;margin-top:8px;overflow:auto}.workspace-footer-actions{display:flex;gap:8px;flex-wrap:wrap;padding:12px 15px 17px}.theory-tools{grid-template-columns:minmax(300px,1fr) 2fr}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:13px}.topic-card{border:1px solid var(--line);border-radius:17px;padding:15px;background:var(--panel-glass);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:.18s}.topic-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}.topic-card header{display:flex;justify-content:space-between;gap:8px}.topic-card h3{font-size:1rem;margin:11px 0 7px}.topic-card p{color:var(--muted);font-size:.8rem;line-height:1.5;flex:1}.topic-card .principle{font-family:ui-monospace,monospace;color:var(--primary);font-size:.72rem;padding:8px;border-radius:10px;background:var(--panel-soft);margin:8px 0}.diagnostic-tools{grid-template-columns:minmax(300px,1fr) 210px}.diagnostic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:13px}.diagnostic-card{border:1px solid var(--line);border-radius:17px;padding:15px;background:var(--panel-glass);box-shadow:var(--shadow-sm)}.diagnostic-card.critical{border-color:color-mix(in srgb,var(--red) 38%,var(--line))}.diagnostic-card.high{border-color:color-mix(in srgb,var(--yellow) 35%,var(--line))}.diagnostic-top{display:flex;justify-content:space-between;gap:8px}.diagnostic-card h3{font-size:1rem;margin:11px 0 7px}.diagnostic-card p{color:var(--muted);font-size:.8rem;line-height:1.5}.stop-badge{color:var(--red);font-size:.68rem;font-weight:900}.tools-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.formula-lab,.glossary-lab{padding:18px}.tool-head{display:flex;justify-content:space-between;gap:12px}.tool-head small{color:var(--primary);font-weight:850}.tool-head h3{margin:4px 0}.tool-icon{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--panel-soft);color:var(--primary);font-weight:950}.full-select{width:100%;margin:12px 0}.formula-display{font-family:ui-monospace,monospace;color:var(--primary);background:var(--panel-soft);border:1px solid var(--line);border-radius:12px;padding:12px;margin:10px 0}.formula-lab>p{color:var(--muted);line-height:1.5}.calculator-inputs{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin:12px 0}.calculator-inputs label{display:grid;gap:5px;color:var(--muted);font-size:.72rem}.calculator-inputs input{border:1px solid var(--line);border-radius:10px;background:var(--panel-soft);color:var(--text);padding:9px}.calculator-result{margin-top:12px;border:1px solid color-mix(in srgb,var(--green) 27%,var(--line));background:color-mix(in srgb,var(--green) 6%,var(--panel));border-radius:14px;padding:13px}.calculator-result span{color:var(--muted);font-size:.7rem}.calculator-result strong{display:block;font-size:1.35rem;margin:3px 0}.calculator-result p{margin:0;color:var(--muted);font-size:.75rem}.glossary-count{color:var(--muted);font-size:.75rem;margin:9px 0}.glossary-list{display:grid;gap:7px;max-height:480px;overflow:auto}.glossary-item{border:1px solid var(--line);border-radius:12px;padding:10px;background:var(--panel-soft)}.glossary-item strong{font-size:.85rem}.glossary-item span{color:var(--primary);font-size:.65rem;margin-left:6px}.glossary-item p{margin:5px 0 0;color:var(--muted);font-size:.75rem;line-height:1.45}.quiz-shell{display:grid;grid-template-columns:320px 1fr;overflow:hidden}.quiz-side{padding:22px;background:linear-gradient(145deg,color-mix(in srgb,var(--primary) 14%,var(--panel)),color-mix(in srgb,var(--primary2) 10%,var(--panel)))}.quiz-vehicle{font-size:3rem}.quiz-side h3{font-size:1.5rem;margin:8px 0}.quiz-side p{color:var(--muted);line-height:1.5}.quiz-progress{height:10px;background:var(--panel-soft);border-radius:99px;overflow:hidden;margin:16px 0 7px}.quiz-progress div{height:100%;width:0;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:.25s}.quiz-score-row{display:flex;justify-content:space-between;margin:16px 0;color:var(--muted)}.quiz-main{padding:24px}.quiz-main h3{line-height:1.5;margin-top:0}.answers{display:grid;gap:9px}.answer{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:12px;padding:12px;text-align:left}.answer:hover{border-color:var(--line-strong)}.answer.correct{border-color:var(--green);background:color-mix(in srgb,var(--green) 9%,var(--panel))}.answer.wrong{border-color:var(--red);background:color-mix(in srgb,var(--red) 8%,var(--panel))}.quiz-feedback{min-height:56px;color:var(--muted);line-height:1.5;margin-top:12px}.notebook-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:15px}.notebook-card,.achievements-card{padding:18px}.notebook-card h3,.achievements-card h3{margin-top:0}.notebook-list{display:grid;gap:8px;max-height:520px;overflow:auto}.note-item{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px;background:var(--panel-soft)}.note-index{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--panel);color:var(--primary);font-weight:900}.note-item small{display:block;color:var(--muted);font-size:.68rem;margin-top:3px}.achievement-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.achievement{border:1px solid var(--line);border-radius:13px;padding:10px;background:var(--panel-soft);opacity:.55}.achievement.unlocked{opacity:1;border-color:color-mix(in srgb,var(--yellow) 35%,var(--line));background:color-mix(in srgb,var(--yellow) 7%,var(--panel))}.achievement span{font-size:1.4rem}.achievement strong{display:block;font-size:.78rem;margin:4px 0}.achievement small{color:var(--muted);font-size:.65rem;line-height:1.35}.references{padding:20px}.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.source-card{border:1px solid var(--line);border-radius:14px;padding:12px;background:var(--panel-soft)}.source-card a{color:var(--primary);font-weight:850;text-decoration:none}.source-card p{color:var(--muted);font-size:.76rem;line-height:1.45}.footer{text-align:center;color:var(--muted);line-height:1.7;margin-top:34px;padding:26px 12px;border-top:1px solid var(--line)}.footer strong{color:var(--text)}.footer a{color:var(--primary);font-weight:850}.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:18px;background:rgba(3,10,20,.76);backdrop-filter:blur(8px)}.modal.open{display:flex}.modal-panel{width:min(790px,100%);max-height:90vh;overflow:auto;border:1px solid var(--line);border-radius:22px;background:var(--panel);box-shadow:var(--shadow)}.modal-panel.wide{width:min(1000px,100%)}.modal-head{display:flex;justify-content:space-between;align-items:start;gap:12px;padding:18px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--panel);z-index:2}.modal-head h3{margin:8px 0 3px}.modal-head p{margin:0;color:var(--muted)}.close-btn{width:38px;height:38px;border:1px solid var(--line);background:var(--panel-soft);color:var(--text);border-radius:11px}.modal-body{padding:18px;color:var(--muted);line-height:1.65}.detail-hero{display:grid;grid-template-columns:110px 1fr;gap:16px;align-items:center;padding:15px;border:1px solid var(--line);border-radius:16px;background:var(--panel-soft);margin-bottom:14px}.detail-icon{width:96px;height:96px;border-radius:24px;display:grid;place-items:center;font-size:3rem;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2));box-shadow:var(--shadow-sm)}.detail-hero strong{color:var(--text)}.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.detail-section{border:1px solid var(--line);border-radius:14px;padding:12px;background:var(--panel-soft)}.detail-section.full{grid-column:1/-1}.detail-section h4{margin:0 0 6px;color:var(--text);font-size:.85rem}.detail-section p{margin:0;font-size:.8rem}.tag-row{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.tag{font-size:.67rem;border:1px solid var(--line);border-radius:999px;padding:5px 7px;background:var(--panel)}.related-buttons{display:flex;gap:6px;flex-wrap:wrap}.related-buttons button{border:1px solid var(--line);border-radius:999px;padding:6px 8px;background:var(--panel);color:var(--primary);font-size:.7rem}.empty{color:var(--muted);padding:20px;text-align:center;border:1px dashed var(--line);border-radius:14px}.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);opacity:0;z-index:200;background:var(--text);color:var(--panel);padding:10px 14px;border-radius:999px;font-size:.78rem;transition:.2s;pointer-events:none}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:1180px){.nav-links{display:none}.component-grid{grid-template-columns:repeat(3,1fr)}.topic-grid,.diagnostic-grid{grid-template-columns:repeat(2,1fr)}.lab-app{grid-template-columns:280px 1fr}.workspace-grid{grid-template-columns:260px 1fr}.readout-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:920px){.hero{grid-template-columns:1fr}.hero-garage{min-height:310px}.progress-strip{grid-template-columns:repeat(2,1fr)}.portal-grid{grid-template-columns:1fr}.machine-layout{grid-template-columns:1fr}.system-browser{position:static}.system-list{display:flex;overflow:auto;max-height:none}.system-list button{min-width:max-content}.component-tools{grid-template-columns:1fr 1fr}.component-grid{grid-template-columns:repeat(2,1fr)}.lab-app{grid-template-columns:1fr}.lab-browser{position:static}.lab-list{display:grid;grid-template-columns:repeat(2,1fr);max-height:340px}.workspace-grid{grid-template-columns:1fr}.tools-grid,.notebook-grid{grid-template-columns:1fr}.source-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.shell{width:min(100% - 18px,1360px)}.topbar-wrap{position:static;padding:8px 9px 0}.topbar{align-items:flex-start}.brand{min-width:0}.brand small{display:none}.xp-pill,.level-pill{display:none}.hero{padding:42px 4px 26px}.hero h1{font-size:clamp(2.4rem,13vw,4rem)}.hero-garage{min-height:250px}.formula-chip{font-size:.61rem}.chip-three{left:20px}.progress-strip{grid-template-columns:1fr 1fr}.portal-switch{position:static;grid-template-columns:1fr 1fr}.portal-switch-divider{display:none}.forge-intro{padding:19px;align-items:flex-start}.forge-badge{font-size:3.5rem}.forge-stats{display:grid;grid-template-columns:1fr 1fr}.machine-stage{padding:11px}.vehicle-map,.vehicle-map svg{min-height:430px}.hotspot-label{display:none}.component-tools,.theory-tools,.diagnostic-tools{grid-template-columns:1fr}.component-grid,.topic-grid,.diagnostic-grid{grid-template-columns:1fr}.lab-list{grid-template-columns:1fr}.workspace-head{padding:14px}.workspace-badges .confidence{display:none}.experiment-guide{overflow:auto}.workspace-grid{padding:10px}.canvas-shell{min-height:350px}.canvas-shell canvas{height:350px}.learning-grid{grid-template-columns:1fr;padding:0 10px 10px}.explanation-tabs,.workspace-footer-actions{padding-left:10px;padding-right:10px}.explanation-panel{margin-left:10px;margin-right:10px}.calculator-inputs{grid-template-columns:1fr}.quiz-shell{grid-template-columns:1fr}.achievement-grid,.source-grid{grid-template-columns:1fr}.detail-grid{grid-template-columns:1fr}.detail-section.full{grid-column:auto}.detail-hero{grid-template-columns:1fr;text-align:center}.detail-icon{margin:auto}.top-actions{gap:4px}.icon-btn{width:37px;height:37px}.machine-stage-head{flex-direction:column}.progress-strip article strong{font-size:1.25rem}}

/* Defensive responsive sizing for scrollable workshop rows */
.machine-layout>*,.system-browser,.machine-stage,.system-list,.vehicle-map,.machine-stage-head,.machine-map-footer{min-width:0;max-width:100%}
@media(max-width:920px){.system-list{width:100%;max-width:100%;overflow-x:auto;overflow-y:hidden}.system-list button{flex:0 0 auto}.machine-stage-head,.machine-map-footer{flex-wrap:wrap}.vehicle-map{width:100%}}
@media(max-width:620px){.vehicle-map{min-height:390px}.vehicle-map svg{min-height:390px}.hotspot-label{display:none}.machine-stage{padding:12px}.system-browser{padding:12px}}
@media(max-width:620px){.section-heading{display:flex;flex-wrap:wrap}.section-heading>.confidence{flex:1 1 100%;max-width:100%;white-space:normal;overflow-wrap:anywhere}.confidence-key{width:100%}}