@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;450;500;550;600;650;700;750;800&family=DM+Mono:wght@400;500&display=swap');
:root{--bg:#fafbf8;--ink:#193d37;--muted:#71817a;--green:#177361;--mint:#cce9d9;--line:#dfe6df;--orange:#e58b54;--mono:'DM Mono',monospace;--font:'Be Vietnam Pro',Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:14px;line-height:1.75}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.35}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #e7975b;outline-offset:4px}button{border:0}h1,h2,h3,h4,p{margin:0}button,a{touch-action:manipulation}.wrap{max-width:1320px;width:calc(100% - 112px);margin-inline:auto}.header{height:86px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;background:#fafbf8f2;backdrop-filter:blur(18px)}.nav-wrap{height:100%;max-width:1450px;width:calc(100% - 80px);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:750;letter-spacing:-.8px;white-space:nowrap}.brand-mark{width:37px;height:37px;border-radius:10px;background:var(--ink);color:#eef9df;display:inline-flex;align-items:center;justify-content:center;font-size:24px;letter-spacing:-2px;font-weight:600;padding-bottom:3px}.brand-mark>span{color:#bce7b4}.brand-line{width:1px;height:23px;background:var(--line);margin:0 6px}.brand-sub{font:8px var(--mono);letter-spacing:1px;max-width:95px;white-space:normal;line-height:1.6;color:var(--muted)}nav{display:flex;align-items:center;gap:28px;font-size:12px;font-weight:500}nav a:hover,.text-link:hover{color:var(--green)}.nav-count{font:9px var(--mono);background:#e9eee7;padding:3px 4px;margin-left:4px}.nav-cta{font-size:11px;font-weight:600;border:1px solid #bbcac1;padding:10px 15px;border-radius:6px;white-space:nowrap}.nav-cta span{margin-left:16px}.menu-toggle{display:none}.hero{display:grid;grid-template-columns:1fr 1.03fr;gap:40px;padding-top:66px;padding-bottom:64px;align-items:center}.eyebrow{font-size:9px;letter-spacing:1.5px;font-weight:600;display:flex;align-items:center;gap:9px;color:#477469}.live-dot{width:6px;height:6px;display:inline-block;background:#479b72;border-radius:50%;box-shadow:0 0 0 4px #d6ead866;flex-shrink:0}h1{font-size:clamp(38px,4.05vw,61px);line-height:1.29;font-weight:650;letter-spacing:-2.6px;margin:27px 0 23px}h1>span{color:var(--green)}.hero-desc{font-size:14px;line-height:1.95;color:#75817a;max-width:470px}.hero-desc strong{font-weight:550;color:#315b50}.inline-en{font-size:11px;color:#4b7769;display:inline-block;background:#ecf2e9;padding:0 7px;border-radius:4px}.hero-actions{display:flex;align-items:center;gap:24px;margin-top:30px}.button{padding:13px 19px;font-size:11px;font-weight:550;border-radius:6px;display:inline-flex;align-items:center;gap:24px;white-space:nowrap;transition:background .2s,transform .2s}.button:hover{transform:translateY(-2px)}.primary{background:var(--ink);color:#f0f8e8}.primary:hover{background:#256e5e}.text-link{font-size:11px;display:flex;align-items:center;gap:8px}.round-play{border:1px solid #ced7cc;width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:13px}.hero-meta{display:flex;gap:20px;font-size:9px;color:var(--muted);margin-top:39px;align-items:center}.hero-meta>span{display:flex;gap:6px;align-items:center;white-space:nowrap}.hero-meta b{font:16px var(--mono);color:var(--ink)}.hero-meta>span+span{border-left:1px solid var(--line);padding-left:17px}.tiny-cube{font-size:21px;color:var(--green)}.hero-visual{height:486px;border:1px solid #e1e9df;border-radius:15px;background-color:#eff4ec;background-image:radial-gradient(#c0d0c0 1px,transparent 1px);background-size:20px 20px;position:relative;overflow:hidden}.scene-top{position:absolute;top:20px;left:22px;right:22px;display:flex;justify-content:space-between;font:8px var(--mono);letter-spacing:.6px;color:#648272;z-index:2;pointer-events:none}.scene-top i{display:inline-block;width:5px;height:5px;border-radius:50%;background:#4f9871;margin-right:5px}.car-canvas{width:100%;height:365px;position:relative}.car-canvas canvas{display:block;touch-action:pan-y}.car-label{position:absolute;font-size:10px;background:#ffffffea;border:1px solid #d5ded1;padding:7px 10px;border-radius:6px;box-shadow:0 4px 12px #25442c06;pointer-events:none;transition:opacity .4s}.car-label:before{content:'';display:inline-block;width:5px;height:5px;border:1px solid #6f9e83;border-radius:50%;margin-right:6px}.car-label span{display:block;color:#829083;font-size:8px;margin-left:11px}.label-body{top:82px;left:16%}.label-engine{top:190px;right:5%}.label-wheel{bottom:155px;left:7%}.scene-hint{position:absolute;bottom:118px;left:0;right:0;text-align:center;font-size:8px;letter-spacing:.5px;color:#859380;pointer-events:none}.hero-stage{position:absolute;bottom:14px;left:14px;right:14px;padding:10px 12px;background:#ffffffd9;border:1px solid #e2e7df;border-radius:9px;backdrop-filter:blur(10px)}.stage-caption{display:flex;justify-content:space-between;align-items:center;font-size:9px;color:#6b7c6b;margin-bottom:7px}.stage-caption button{background:none;font-size:18px;padding:0 5px;line-height:1}.stage-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}.stage-tabs button{background:#f2f5ef;border:1px solid transparent;padding:8px 3px;border-radius:5px;font:9px var(--mono);color:#71806b}.stage-tabs button span{display:block;font:9px var(--font);margin-top:3px}.stage-tabs button.active{background:#e0efdf;border-color:#b9d6b7;color:#285a40}.intro-strip{border-block:1px solid var(--line)}.intro-strip>.wrap{display:flex;align-items:center;gap:28px;padding-block:19px}.strip-label{font-size:8px;letter-spacing:1px;color:var(--green);font-weight:600}.intro-strip p{font-size:11px;color:#768078}.intro-strip a{margin-left:auto;border:1px solid var(--line);border-radius:50%;width:27px;height:27px;text-align:center}.section{padding-block:76px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:32px}.section-heading h2{font-size:31px;line-height:1.4;letter-spacing:-1.2px;font-weight:550;margin-top:12px}.section-heading>p{font-size:11px;color:#7c877e;line-height:1.9;max-width:415px}.core-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.core-card{text-align:left;background:transparent;border:1px solid var(--line);padding:22px 20px;border-radius:8px;transition:border .2s,background .2s;position:relative;min-height:229px}.core-card:hover{border-color:#91af9b}.core-card.active{background:#eff5eb;border-color:#aec7af}.core-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.core-card-top>.number{font:10px var(--mono);color:#95a18f}.core-icon{width:34px;height:34px;border:1px solid #d6e1d1;border-radius:7px;display:grid;place-items:center;color:#4a7a58;background:#eef3e9}.core-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.4}.core-card h3{font-size:15px;font-weight:550;margin-bottom:3px}.core-card .en{font:8px var(--mono);letter-spacing:.5px;color:#82907f;text-transform:uppercase}.core-card p{font-size:10px;color:#7d897d;line-height:1.9;margin-top:12px;padding-right:8px}.core-card .card-arrow{position:absolute;right:15px;bottom:16px;color:#719369}.core-detail{display:grid;grid-template-columns:1.4fr 1fr;background:#f1f4ed;margin-top:15px;padding:25px 28px;border-radius:8px;gap:48px}.small-label{font-size:8px;font-weight:550;letter-spacing:1.1px;color:#80907c;display:block}.core-detail h3{font-size:17px;letter-spacing:-.4px;font-weight:500;margin-top:9px}.core-detail p{font-size:11px;color:#6b7c6c;line-height:1.9;margin-top:8px}.core-practice{border-left:1px solid #d9e3d3;padding-left:26px}.core-practice a{font-size:9px;display:inline-block;margin-top:10px;color:#49714b}.note{font-size:9px;color:#8b9686;line-height:1.9;margin-top:16px}.note a{color:#658069;text-decoration:underline;text-underline-offset:3px}.lab-section{padding:72px 0 65px;background:#f0f3ed;border-block:1px solid #e1e7db}.example-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:11px;margin-bottom:23px}.example-card{text-align:left;border:1px solid #dbe3d5;border-radius:8px;padding:0;overflow:hidden;background:#f7f9f3;transition:border-color .2s}.example-card:hover{border-color:#759c80}.example-card.active{border-color:#408069;box-shadow:0 0 0 1px #408069}.example-art{height:88px;display:flex;align-items:center;justify-content:center;gap:6px;position:relative;background:radial-gradient(ellipse,#e4ecdd88,transparent);overflow:hidden}.example-art .bar{width:13px;background:#a8cbb4;border:1px solid #81ac93;box-shadow:4px -3px 0 #d4e7d3;transform:skewY(-8deg);align-self:flex-end;margin-bottom:18px}.example-art .bar.hot{background:#dfa06f;border-color:#cf8f5c;box-shadow:4px -3px 0 #f4cfab}.example-card-copy{padding:12px 13px;border-top:1px solid #e2e8dc}.example-card-copy>span{display:flex;justify-content:space-between;color:#8c9886;font:8px var(--mono);margin-bottom:6px}.example-card h3{font-size:12px;font-weight:550}.example-card p{font-size:9px;color:#83907d;margin-top:2px}.example-art .tile{width:25px;height:25px;transform:rotate(-10deg) skewY(5deg);border:1px solid #a4c6ae;background:#d5e5cf;text-align:center;font:10px/25px var(--mono);color:#7b967a;box-shadow:2px 3px 0 #b4ceae}.example-art .tile.hot{background:#dfaa79;color:#fff;border-color:#ca945f;box-shadow:2px 3px 0 #c58d57}.graph-art svg{width:130px;height:85px}.gcd-art{display:grid;grid-template-columns:repeat(4,17px);gap:3px;transform:rotate(-18deg) skewY(6deg)}.gcd-art i{height:17px;background:#a5c7af;border:1px solid #88ae91;box-shadow:2px 2px #729a81}.gcd-art i:nth-child(n+9){background:#e1b285;border-color:#c89d70}.sieve-art{display:grid;grid-template-columns:repeat(5,16px);gap:4px;transform:rotate(-8deg)}.sieve-art i{height:15px;background:#d7e2d0;border:1px solid #bbcbb3;border-radius:2px}.sieve-art i:nth-child(3n+1){background:#90b99b;border-color:#72a281}.lab-panel{border:1px solid #d9e2d4;border-radius:11px;background:#fafbf7;overflow:hidden}.lab-header{display:flex;justify-content:space-between;align-items:center;padding:19px 25px;border-bottom:1px solid #e1e7dc;gap:12px}.lab-header>div{display:flex;gap:15px;align-items:center}.lab-number{font:9px var(--mono);color:#83927d}.lab-header h3{font-size:18px;font-weight:550;letter-spacing:-.4px}.level{font-size:7px;letter-spacing:.8px;border:1px solid #d9e4d2;padding:3px 6px;border-radius:4px;color:#6b8c65}.scenario-label{display:flex;align-items:center;gap:10px;font-size:9px;color:#819078}select{font-size:10px;color:#4f6e4d;border:1px solid #d9e2d1;padding:6px 9px;border-radius:5px;background:#f9fbf5;cursor:pointer}.lab-body{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(280px,1fr)}.lab-left{min-width:0}.lab-view{height:352px;position:relative;overflow:hidden;background-image:radial-gradient(#c8d4c4 1px,transparent 1px);background-size:20px 20px;background-color:#f3f6ef}.view-label{position:absolute;top:18px;left:20px;right:20px;display:flex;align-items:center;gap:8px;font:8px var(--mono);letter-spacing:.6px;color:#82947a;pointer-events:none;z-index:2}.view-type{margin-left:auto;border:1px solid #d5dfcf;padding:2px 5px;border-radius:3px}.view-reset{position:absolute;right:17px;bottom:43px;border:1px solid #d7e0cf;border-radius:5px;background:#fafbf5d9;font-size:17px;width:30px;height:30px}.lab-legend{position:absolute;bottom:15px;left:20px;right:20px;display:flex;gap:18px;font-size:8px;color:#839079;pointer-events:none}.lab-legend span{display:flex;align-items:center;gap:5px}.lab-legend i{display:inline-block;width:6px;height:6px;border-radius:2px}.legend-mint{background:#69a489}.legend-orange{background:#e3a06d}.legend-gray{background:#b8c4b1}#algorithm-canvas{width:100%;height:100%}canvas{display:block;outline:none}.player{padding:14px 20px 10px;border-top:1px solid #e0e7d8;min-height:112px}.player-top{display:flex;align-items:center;gap:18px}.player-buttons{display:flex;align-items:center;gap:6px}.player-buttons button{font:16px var(--mono);width:29px;height:29px;border:1px solid #dbe4d5;border-radius:5px;background:#f8faf4;line-height:1}.player-buttons .play-button{background:var(--ink);color:#f0fae9;border-color:var(--ink);width:35px}.step-count{font:9px var(--mono);color:#83917a}.speed-label{margin-left:auto}.speed-label select{padding:4px 6px}.player input[type=range]{accent-color:#4a8462;width:100%;margin:13px 0 4px;height:3px;display:block;cursor:pointer}.player-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:8px;color:#92a087;margin-top:10px}.player-bottom label{display:flex;align-items:center;gap:4px}.player-bottom input{width:11px;height:11px;accent-color:#437b5e;margin:0}.lab-right{padding:21px 25px;border-left:1px solid #e1e7dc}.aside-heading{display:flex;align-items:center;justify-content:space-between}.aside-heading>span:last-child{font:9px var(--mono);border:1px solid #dfe7d8;padding:2px 5px;color:#829277;border-radius:4px}.lab-right h4{font-size:15px;font-weight:550;margin:12px 0 7px;line-height:1.6}.lab-right>p{font-size:10px;color:#84907d;line-height:1.9;min-height:38px}.state-box{padding:12px;background:#f0f4eb;border-radius:5px;margin-top:14px}.state-box .small-label{font-size:7px}#state-data{font:10px/1.9 var(--mono);color:#57734c;overflow-wrap:anywhere;margin-top:6px}.code-heading{display:flex;justify-content:space-between;align-items:center;margin-top:19px}.code-heading>span:last-child{font:7px var(--mono);color:#a0a997}pre{font:9px/1.9 var(--mono);margin:10px 0 0;color:#8b9982;white-space:pre-wrap;overflow-wrap:anywhere}.code-line{display:block;border-left:2px solid transparent;padding:1px 7px;border-radius:0 3px 3px 0}.code-line.active{background:#e8f0e1;border-left-color:#659967;color:#3d6842}.code-line .ln{display:inline-block;min-width:20px;color:#a5ae9a;user-select:none}.lab-right .complexity{font:8px/1.7 var(--mono);color:#96a18c;margin-top:12px;min-height:0}.lab-footer{display:flex;justify-content:space-between;align-items:center;gap:25px;border-top:1px solid #e1e7dc;padding:12px 24px;color:#89957f;font-size:9px}.lab-footer a{white-space:nowrap;color:#4e7952}.lesson-below{display:grid;grid-template-columns:1.15fr 1fr;gap:36px;margin-top:26px}.ct-mapping,.quiz{min-width:0}.mapping-tabs{display:flex;gap:5px;flex-wrap:wrap;margin-top:12px}.mapping-tabs button{padding:5px 8px;border-radius:4px;background:#e7eddf;color:#7b8a70;font-size:9px}.mapping-tabs button.active{background:#d8e8cf;color:#39643f}.ct-mapping>p{font-size:11px;color:#76846d;margin-top:12px;line-height:1.9}.ct-mapping .condition{font-size:9px;padding-top:12px;border-top:1px solid #dce4d3;color:#8e997f}.quiz{padding-left:28px;border-left:1px solid #dce4d3}.quiz h4{font-size:12px;line-height:1.7;font-weight:500;margin-top:10px}.quiz #quiz-options{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}.quiz button{border:1px solid #d5dfce;border-radius:4px;padding:5px 10px;font-size:10px;background:#f6f8f1}.quiz button.correct{border-color:#78a57b;background:#dae9d3;color:#3c7043}.quiz button.wrong{border-color:#d8af8e;background:#f0e3d3;color:#9f714f}.quiz>p{font-size:9px;color:#89977c;margin-top:9px;min-height:20px}.muted{color:#94a38d}.abstraction-layout{display:grid;grid-template-columns:.8fr 2fr;border:1px solid var(--line);border-radius:10px;overflow:hidden}.abstraction-nav{padding:11px;border-right:1px solid var(--line)}.abstraction-nav button{width:100%;text-align:left;padding:16px 17px;background:none;border-radius:5px;display:flex;align-items:center;gap:15px}.abstraction-nav button.active{background:#edf3e8}.abstraction-nav button>span:first-child{font:10px var(--mono);color:#91a187}.abstraction-nav b{font-size:12px;font-weight:500;display:block}.abstraction-nav small{font:8px var(--mono);color:#99a18d}.abstraction-nav .arrow{margin-left:auto;font-size:18px;color:#7a9270}.abstraction-detail{padding:30px;display:grid;grid-template-columns:.7fr 1.3fr;gap:27px;align-items:center;background:linear-gradient(120deg,#f2f6ec80,transparent)}#abstraction-art{height:200px;display:flex;align-items:center;justify-content:center;position:relative}#abstraction-art .abstract-cube{height:85px;width:85px;border:1px solid #79a48a;background:#bfd9be;transform:rotate(-25deg) skew(12deg,12deg);box-shadow:14px 18px 0 #94ba9c,15px 19px 0 1px #759e82;display:grid;place-items:center;font:19px var(--mono);color:#52795b}#abstraction-art .abstract-orbit{width:150px;height:150px;border:1px dashed #cad7be;border-radius:50%;position:absolute;transform:rotateX(55deg)}.abstract-tag{position:absolute;font:8px var(--mono);color:#75956d;border:1px solid #d2dfc9;background:#f6faef;padding:4px 8px;bottom:18px;z-index:1}.abstraction-detail h3{font-size:20px;font-weight:500;letter-spacing:-.5px;margin:8px 0 12px}.abstraction-detail p{font-size:10px;line-height:1.95;color:#839177}.keep-drop{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:17px 0}.keep-drop p{border-top:1px solid #dce4d4;padding-top:10px}.keep-drop span{display:block;font-size:7px;letter-spacing:1px;color:#97a18b;margin-bottom:4px}.keep-drop b{font-size:10px;font-weight:400;color:#6a8461}.abstraction-detail a{font-size:9px;color:#4b774c}.takeaway{padding:39px 38px;background:#eaf2e4;border:1px solid #dce7d5;border-radius:10px;display:flex;gap:30px;align-items:center}.takeaway-icon{font-size:63px;color:#80a777;line-height:1}.takeaway h2{font-size:25px;font-weight:500;letter-spacing:-.9px;margin:12px 0;line-height:1.5}.takeaway p{font-size:10px;color:#7d8f70;line-height:1.9}.takeaway .button{margin-left:auto}.sources .section-heading h2{font-size:26px}.sources-list{display:grid;grid-template-columns:1fr 1fr;gap:0 35px}.source-row{display:flex;gap:15px;padding:17px 0;border-top:1px solid var(--line);align-items:flex-start}.source-index{font:9px var(--mono);color:#9aa78e;padding-top:3px}.source-row h3{font-size:11px;font-weight:500}.source-row p{font-size:9px;color:#8b9880;margin-top:4px}.source-row>a{margin-left:auto;color:#6b8b61;font-size:17px}.source-date{font-size:8px;color:#9ba58f;margin-top:20px}.footer{border-top:1px solid var(--line);padding-block:28px;display:flex;align-items:center;gap:25px}.footer .brand{font-size:15px}.footer .brand-mark{width:28px;height:28px;font-size:19px;border-radius:7px}.footer p{font-size:9px;color:#8a9881}.footer>a:last-child{margin-left:auto;font-size:9px;color:#6f8764}.skip{position:fixed;top:-100px;left:10px;background:var(--ink);color:white;padding:10px;z-index:100}.skip:focus{top:10px}.noscript{padding:20px;background:#fff0ce;text-align:center}.fallback{position:absolute;inset:50px 20px;display:grid;place-content:center;text-align:center;gap:10px;font-size:12px;color:#6b8161}.fallback strong{font-weight:500}.fallback p{font-size:10px;max-width:370px}.fallback-bars{height:110px;display:flex;align-items:flex-end;justify-content:center;gap:8px}.fallback-bars i{width:24px;background:#9cbea0;border:1px solid #739b78;border-radius:4px 4px 0 0}.fallback-bars b{position:relative;top:-24px;font:10px var(--mono)}
@media(min-width:1500px){.hero{gap:60px;padding-block:79px}.hero-visual{height:520px}.car-canvas{height:397px}h1{font-size:64px}}
@media(max-width:1150px){.wrap{width:calc(100% - 64px)}.nav-wrap{width:calc(100% - 48px)}.brand-sub,.brand-line{display:none}nav{gap:20px}.hero{gap:24px}.hero-actions{gap:13px}.hero-actions .button{gap:12px}.hero-meta{gap:12px}.hero-meta>span+span{padding-left:12px}.hero-meta>span:last-child{display:none}.core-card{padding:18px 16px}.lab-right{padding:18px}.lab-body{grid-template-columns:minmax(0,1.4fr) minmax(280px,1fr)}.abstraction-detail{gap:15px;padding:23px}.takeaway{gap:22px}.takeaway-icon{font-size:43px}}
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/* Teaching copy stays readable at presentation and phone sizes. */
.hero-desc{font-size:15px}.core-card p{font-size:11px}.core-detail p,.ct-mapping>p,.abstraction-detail p{font-size:12px}.section-heading>p{font-size:12px}.lab-right>p{font-size:12px;color:#65775e}.lab-right h4{font-size:16px}#state-data{font-size:11px}pre{font-size:11px}.lab-right .complexity{font-size:9px}.small-label{font-size:9px}.lab-legend{font-size:9px}.lab-footer,.note,.quiz>p{font-size:10px}.quiz h4{font-size:13px}.quiz button{font-size:11px}.source-row p{font-size:10px}.source-row h3{font-size:12px}.lab-body{align-items:stretch}.lab-left{display:flex;flex-direction:column}.lab-view{flex:1;min-height:352px}.player{flex:none}.keep-drop b{font-size:11px}.abstraction-detail a{font-size:10px}
@media(max-width:850px){.lab-legend{font-size:7px;gap:10px}.lab-right>p{font-size:11px}.core-card p{font-size:10px}.section-heading>p{font-size:11px}}
@media(max-width:620px){.hero-desc{font-size:13px}.lab-view{flex:none;min-height:305px}.lab-right>p{font-size:12px}.lab-legend{font-size:8px}.core-detail p,.ct-mapping>p,.abstraction-detail p{font-size:11px}.core-card p{font-size:10px}.abstraction-detail{grid-template-columns:1fr}#abstraction-art{height:120px}.abstraction-detail h3{font-size:20px}.keep-drop{grid-template-columns:1fr 1fr}.note{font-size:9px}.quiz>p{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
.car-workshop{border:1px solid #d8e6d6;border-radius:12px;padding:27px;background:#fff;margin:0 0 24px}.workshop-header{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}.workshop-header h3{font-size:21px;font-weight:550;margin:7px 0}.workshop-header p{font-size:12px;color:#708274}.workshop-header label{font-size:10px;color:#65806b;display:grid;gap:5px;white-space:nowrap}.parts-list{display:flex;flex-wrap:wrap;gap:7px;margin-top:23px}.parts-list button,.car-controls button{border:1px solid #d8e5d6;background:#f6faf3;border-radius:6px;padding:9px 12px;font-size:11px}.parts-list button.active{background:#d7ead5;border-color:#649b76;color:#174d38}.parts-list button.missing{border-style:dashed;color:#b47758;background:#fcf2e8}.part-detail{min-height:48px;padding:12px 14px;background:#f1f7ee;color:#526f55;margin-top:10px;border-radius:6px;font-size:11px}.car-process{display:grid;grid-template-columns:1.3fr 1fr;gap:25px;margin-top:25px}.car-step h4{font-size:18px;font-weight:550;margin:8px 0}.car-step p{font-size:12px;color:#687d69;min-height:50px;line-height:1.8}.car-progress{display:flex;gap:12px;align-items:center;margin-top:14px;color:#71866e;font:10px var(--mono)}.car-progress input{flex:1;accent-color:#498567}.car-controls{display:flex;gap:7px;flex-wrap:wrap;margin-top:13px}.car-controls #car-play{background:#214d40;color:#fff;border-color:#214d40}.car-inventory{background:#f3f7ee;border:1px solid #e0eadd;border-radius:8px;padding:20px}.inventory-row{display:flex;justify-content:space-between;align-items:center;padding:9px 0;border-bottom:1px solid #e0e9dc;font-size:12px}.inventory-row strong{font:14px var(--mono);color:#397753}.inventory-row.warning strong{color:#b6744e}.car-inventory p{font-size:11px;line-height:1.7;color:#57795a;margin-top:14px}.car-inventory p.warning{color:#a25d3c}@media(max-width:620px){.car-workshop{padding:18px}.workshop-header{flex-direction:column;gap:12px}.workshop-header label{width:100%}.workshop-header select{width:100%}.car-process{grid-template-columns:1fr}.car-step p{min-height:0}.parts-list button,.car-controls button{font-size:10px;padding:9px}.car-inventory{padding:15px}}
.foundations{padding-bottom:0}.foundation-layout{display:grid;grid-template-columns:1fr 1fr;overflow:hidden;border:1px solid #dce7d9;border-radius:14px;background:#f6f9f1}.foundation-view{height:390px;position:relative;background-color:#ecf4e9;background-image:radial-gradient(#bbcfba 1px,transparent 1px);background-size:20px 20px}#foundation-canvas{height:100%;width:100%}.foundation-hint{position:absolute;bottom:18px;left:22px;font-size:10px;color:#738a70;pointer-events:none}.foundation-copy{padding:42px;align-self:center}.foundation-copy h3{font-size:27px;letter-spacing:-1px;margin:13px 0}.foundation-copy>p{font-size:13px;color:#6b806d;line-height:1.9}.foundation-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:25px 0}.foundation-tabs button{padding:12px;text-align:left;background:white;border:1px solid #dce7d8;border-radius:6px;font-size:11px}.foundation-tabs button.active{background:#dcefd9;border-color:#80ae8d;color:#23573d}.foundation-flow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:9px;color:#72906c}.foundation-flow b{padding:6px;background:#e6efdf;border-radius:4px}.car-brief{display:grid;grid-template-columns:1.5fr 1fr;gap:35px;border:1px solid #dce8d8;background:#f2f7ed;border-radius:9px;padding:25px;margin-bottom:18px}.car-brief h3{font-size:18px;margin:8px 0}.car-brief p{font-size:12px;line-height:1.9;color:#607960}.car-brief a{font-size:10px;color:#367658}.car-brief>div+div{border-left:1px solid #d7e4d4;padding-left:25px}@media(max-width:620px){.foundation-layout,.car-brief{grid-template-columns:1fr}.foundation-view{height:280px}.foundation-copy{padding:24px}.foundation-copy h3{font-size:22px}.car-brief{gap:15px;padding:20px}.car-brief>div+div{border-left:0;border-top:1px solid #d7e4d4;padding:15px 0 0}}
.hero-concept{height:486px;position:relative;overflow:hidden;border-radius:15px;border:1px solid #dfe9dd;background:radial-gradient(circle,#d8ead8,#f1f6ed 65%);display:grid;place-items:center}.concept-orbit{position:absolute;width:340px;height:340px;border:1px solid #b6d0b4;border-radius:50%;transform:rotateX(65deg) rotateZ(-25deg)}.concept-orbit.two{width:400px;height:400px;transform:rotateY(65deg) rotateZ(25deg)}.concept-center{width:154px;height:154px;border-radius:32px;background:linear-gradient(135deg,#69a98a,#235a4a);box-shadow:20px 25px 0 #b7d5b8,0 35px 65px #32654833;display:grid;place-content:center;text-align:center;color:white;font-size:52px;font-weight:700;line-height:1}.concept-center span{display:block;font:8px var(--mono);letter-spacing:1px;margin-top:10px}.concept-chip{position:absolute;padding:9px 12px;background:#ffffffda;border:1px solid #dbe8d7;border-radius:6px;font:9px var(--mono);color:#51795c}.c1{top:15%;left:15%}.c2{top:25%;right:9%}.c3{bottom:23%;left:9%}.c4{bottom:13%;right:13%}.car-story{max-width:900px;margin:0 auto 25px}.car-story .hero-visual{width:100%}@media(max-width:620px){.hero-concept{height:300px}.concept-center{width:110px;height:110px;font-size:37px}.concept-orbit{width:230px;height:230px}.concept-orbit.two{width:280px;height:280px}.concept-chip{font-size:7px;padding:7px}.car-story .hero-visual{height:425px}}
.car-selected-label{position:absolute;left:50%;transform:translateX(-50%);top:50px;z-index:3;white-space:nowrap;background:#fffef2eb;border:1px solid #cddfc7;border-radius:20px;padding:6px 12px;font-size:10px;color:#345c44;pointer-events:none;box-shadow:0 5px 16px #40684914}