:root{color-scheme:dark;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:#edf1f5;background:#081322;--gold:#e5ba77;--muted:#a5b3c5;--line:#93a9bf2b;--panel:#132335;--raised:#20354a;--ink:#edf1f5}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;overscroll-behavior:none}button,input{font:inherit}button{border:1px solid var(--line);border-radius:7px;background:#20354a;color:inherit;min-height:44px;padding:0 14px;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:hover{background:#2b4158}button:active{transform:translateY(1px)}button:disabled{opacity:.45;cursor:default}button.primary{background:linear-gradient(100deg,#f1d39a,#cb9b59);color:#302119;border-color:#e3ba7f;box-shadow:inset 0 1px #fff5,0 3px 0 #70512c50;font-weight:700}button.quiet{background:#15253788;color:#d4dfeb}button.selected{background:#d9b4771a;border-color:#cfac7180;color:#f2d69e}button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:2px}[hidden]{display:none!important}
#product-canvas{display:block;position:fixed;inset:0;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none}#safe-insets{position:fixed;pointer-events:none;visibility:hidden;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}
#lab{position:fixed;inset:0;z-index:2;display:flex;flex-direction:column;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);background:radial-gradient(ellipse at 78% -25%,#28435b66,transparent 60%),#081322}
header{height:56px;flex-shrink:0;display:flex;align-items:center;gap:12px;padding:4px 14px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#14253780,#08132200)}.brand{font-weight:650;letter-spacing:2px;white-space:nowrap;font-size:18px;padding-left:11px;border-left:2px solid var(--gold)}.brand span{display:block;color:#b69b70;font-size:8px;letter-spacing:2px;margin-top:3px;font-weight:400}nav{display:flex;gap:5px;margin-left:auto}nav button{background:transparent;border-color:transparent;font-size:13px;padding:0 16px;position:relative}nav button.selected{border-color:#d6bb7a42;background:#ddba7a10;color:#edd2a1}nav button.selected:after{content:"";position:absolute;bottom:0;left:28%;right:28%;height:2px;background:var(--gold)}#return-game{font-size:12px;padding:0 13px}
#lab-main{flex:1;min-height:0;display:flex;padding:10px 12px;gap:12px}.stage{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;position:relative}.table-wrap{position:relative;flex:1;min-height:0;background:radial-gradient(ellipse at center,#1a3041aa,#091521 72%);border:1px solid #7f9ab323;border-radius:12px;overflow:hidden;box-shadow:inset 0 1px #c7d7e50a,0 10px 22px #0002}.table-wrap canvas{width:100%;height:100%;display:block}.table-label{display:none}.transport{display:flex;gap:7px;align-items:center;padding-top:7px}.transport button{font-size:12px;white-space:nowrap;padding:0 12px;box-shadow:inset 0 1px #ffffff09}.transport button:first-child{color:#f0d6a5;border-color:#c6aa7048;background:#253443}.transport input{min-width:0;flex:1;accent-color:var(--gold);height:44px;margin:0}.transport span{font-size:11px;color:var(--muted);min-width:48px;text-align:right;font-variant-numeric:tabular-nums}
.sidebar{width:258px;flex-shrink:0;overflow:auto;padding:12px;border:1px solid #819db62e;border-radius:11px;background:linear-gradient(145deg,#172a3de8,#0f1c2beb);box-shadow:inset 0 1px #b2c6dc0c;scrollbar-width:thin;scrollbar-color:#5a6c7e #122235}.eyebrow{font-size:9px;color:#bea376;letter-spacing:2px}.sidebar h1{font-size:21px;line-height:1.25;margin:6px 0 10px;letter-spacing:1px;font-weight:650}.sidebar p{font-size:12px;color:#b6c3d2;line-height:1.7;margin:6px 0 10px}.route-list{display:flex;gap:5px}.route-list button{font-size:12px;padding:0 8px;flex:1;white-space:nowrap;background:#1e3449}.route-list button.selected{background:#c6a66c1a;border-color:#bca27388;color:#f1d39f}.lesson-sidebar{display:flex;flex-direction:column;overflow:hidden}.lesson-head{flex-shrink:0}.lesson-body{flex:1;min-height:0;overflow:auto;padding:0 3px 0 0;scrollbar-width:thin;scrollbar-color:#6a7d8e #132335;overscroll-behavior:contain}.readout{display:flex;gap:6px;margin:9px 0}.readout div{flex:1;background:#06121d4d;border:1px solid #91aac11f;border-radius:6px;padding:7px 8px;font-size:10px;color:#91a6bb}.readout strong{display:block;font-size:21px;color:#f0d3a0;font-weight:500;margin-bottom:2px;line-height:1.15;font-variant-numeric:tabular-nums}.readout strong small{font-size:11px;color:#9cb0c4}.subcard{border-top:1px solid #b89e7040;margin-top:9px;padding-top:9px}.subcard h2{font-size:12px;font-weight:500;color:#b8c7d7;margin:0 0 7px}.subcard button{width:100%;font-size:12px}.lesson-reward{flex-shrink:0;box-shadow:0 -8px 12px #11203188}.details{font-size:11px;color:var(--muted);line-height:1.7}.details summary{cursor:pointer;min-height:44px;padding:12px 0 9px;color:#d0b582;touch-action:manipulation}.details p{font-size:11px}.pill{display:inline-block;font-size:10px;padding:4px 8px;border:1px solid #b89d6944;border-radius:5px;color:#d2b787;background:#c7a46b07;line-height:1.5}.status-line{font-size:11px;line-height:1.7;color:#dbc191;margin:8px 0}.skin-description{margin:10px 0 12px!important}.skin-buttons{display:grid;gap:6px}.skin-buttons button{font-size:12px}.skin-sidebar h1{font-size:26px;margin-bottom:10px}.skin-sidebar .details{border-top:1px solid var(--line);margin-top:7px}
.wallet{width:100%;overflow:auto;padding:3px 8px;scrollbar-width:thin;scrollbar-color:#5a6c7e #122235}.wallet h1{font-size:23px;margin:0 0 5px;font-weight:650;letter-spacing:1px}.wallet-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.wallet-top p{color:var(--muted);font-size:11px;margin:5px 0}.wallet-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.receipt{border:1px solid #819db633;border-radius:10px;background:linear-gradient(120deg,#1c3043,#102033);padding:12px 15px;position:relative;box-shadow:0 8px 18px #0002}.receipt:before{content:"";position:absolute;top:16px;left:0;width:2px;height:28px;background:#d4af70}.receipt h2{font-size:16px;margin:0 0 8px;font-weight:600;color:#edf1f5}.receipt p{font-size:11px;color:var(--muted);line-height:1.7}.receipt button{font-size:12px;color:#e3c58e;border-color:#b9a07055;min-width:105px}.receipt small{display:block;color:#7189a0;word-break:break-all;font-size:9px;margin-top:8px}.pending{color:#f5d494;background:#5b4b2a33;border:1px solid #a48c4b55;border-radius:8px;padding:8px 10px;margin-top:10px;font-size:12px}.pending button{margin-left:9px}.history{font-size:11px;color:var(--muted);line-height:1.8;margin-top:12px}.history div{padding:5px 0;border-bottom:1px solid #92acc014}.test-tools{font-size:11px;color:var(--muted);margin-top:9px}.test-tools summary{cursor:pointer;min-height:44px;padding:12px 0;touch-action:manipulation}.test-tools button{margin:5px;font-size:12px}
footer{min-height:48px;flex-shrink:0;border-top:1px solid var(--line);display:flex;align-items:center;gap:8px;padding:3px 12px;font-size:10px;color:#93a6ba;background:#071320aa}.footer-copy{flex:1;min-width:0;line-height:1.5}.lab-notice{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:10px;color:#7f94aa}.lab-notice b{color:#c6aa79;font-weight:500;font-size:9px;white-space:nowrap}.lab-notice b:before{content:"";display:inline-block;width:4px;height:4px;border-radius:50%;background:#c6aa79;margin:0 5px 2px 0}#status{display:block;color:#91a5ba;overflow-wrap:anywhere;font-size:10px;line-height:1.4}footer button{min-height:44px;background:#14253788;border-color:#6d869d2e;color:#d1b786;font-size:11px;padding:0 10px;white-space:nowrap}
#ad-panel{position:fixed;z-index:4;inset:0;background:#030c18df;display:flex;align-items:center;justify-content:center;padding:12px;backdrop-filter:blur(7px)}.ad-box{border:1px solid #c2a57066;background:linear-gradient(145deg,#1b3045,#0e1d2e);border-radius:14px;max-width:470px;width:100%;max-height:100%;overflow:auto;padding:20px;box-shadow:0 20px 80px #0007}.ad-box h2{font-size:23px;margin:8px 0;font-weight:650}.ad-box p{font-size:12px;line-height:1.7;color:#b6c5d6}.ad-box button{font-size:12px}.ad-box #hide-ad{display:block;margin:10px auto 0;min-height:44px}#ad-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px}#ad-actions .primary{grid-column:1/-1}
@media(max-width:730px){header{padding:3px 9px;gap:6px;height:52px}.brand{font-size:16px;letter-spacing:1px;padding-left:8px}.brand span{font-size:7px;letter-spacing:1.5px}nav{gap:3px}nav button{padding:0 10px;font-size:12px}#return-game{padding:0 9px;font-size:11px}#lab-main{padding:7px 8px;gap:8px}.sidebar{width:211px;padding:9px}.sidebar h1{font-size:18px;margin:5px 0 8px}.sidebar p{font-size:11px}.eyebrow{font-size:8px;letter-spacing:1.5px}.route-list{gap:3px}.route-list button{font-size:10px;padding:0 4px}.readout{margin:7px 0;gap:5px}.readout div{padding:6px;font-size:9px}.readout strong{font-size:19px}.transport{gap:4px;padding-top:6px}.transport button{padding:0 9px;font-size:11px}.transport span{font-size:10px;min-width:42px}.subcard{margin-top:6px;padding-top:7px}.subcard h2{font-size:11px;margin-bottom:6px}.subcard button{font-size:11px}.skin-sidebar h1{font-size:24px}.skin-description{margin:8px 0 10px!important}.pill{font-size:9px;padding:3px 6px}footer{padding:2px 8px;gap:5px}.lab-notice{font-size:9px;gap:6px}.lab-notice b,#status{font-size:9px}footer button{font-size:10px;padding:0 7px}.ad-box{padding:13px 18px}.ad-box h2{margin:5px 0}.ad-box p{margin:7px 0}.wallet{padding:3px 4px}.wallet h1{font-size:21px}.wallet-top p{font-size:10px}.receipt{padding:10px 12px}.receipt h2{font-size:15px}}
@media(max-height:345px) and (orientation:landscape){header{height:48px}.brand span{display:none}#lab-main{padding-top:5px;padding-bottom:5px}.sidebar{padding:8px}.sidebar h1{font-size:16px;margin:3px 0 6px}.lesson-head .eyebrow{display:none}.subcard h2{display:none}.subcard{padding-top:5px;margin-top:4px}.readout div{padding:5px}.readout strong{font-size:17px}footer{min-height:46px}.skin-sidebar h1{font-size:22px}}
@media(orientation:portrait){#lab-main{flex-direction:column;overflow:auto}.stage{flex:none;height:44vh}.sidebar{width:100%;overflow:visible}.lesson-sidebar{display:block}.lesson-body{overflow:visible}.wallet-grid{grid-template-columns:1fr}header{flex-wrap:wrap;height:auto}.brand{margin-right:auto}nav{order:3;flex-basis:100%;justify-content:center}.lab-notice{gap:4px}.footer-copy{max-width:calc(100% - 100px)}}
@media(prefers-reduced-motion:no-preference){button{transition:background .15s,transform .1s,border-color .15s}}
/* A complete shot is the teaching primary action; optional content stays secondary. */
#play-route{background:linear-gradient(100deg,#edcc92,#c49655);border-color:#d5b176;color:#302319;font-weight:650}
.lesson-reward button.primary{background:#d2b17613;border-color:#bda37770;color:#e6c88f;box-shadow:none}
@media(max-width:730px){.lesson-head h1{font-size:17px;letter-spacing:0;white-space:nowrap}.lesson-reward h2{display:none}}
.lesson-reward h2{display:none}