:root{font-family:Inter,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:#203441;background:#f3f5f4;font-size:16px}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer;border:1px solid #cad5d7;border-radius:7px;background:white;color:#203441;padding:10px 14px;font-size:14px;font-weight:600}button:hover{background:#e8f3f1;border-color:#50837f}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,canvas:focus-visible{outline:3px solid #de9f39;outline-offset:3px}header{height:78px;padding:0 5%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #d8e0df;background:white}.brand{color:#203441;text-decoration:none;font-size:23px;letter-spacing:.07em}.brand:first-letter{color:#24857f}header>span{font-size:12px;letter-spacing:.12em;color:#61717c}header b{background:#eef3f2;padding:7px;margin-left:12px;font-weight:400}main{max-width:1420px;margin:auto;padding:30px 4%}.heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:26px}.eyebrow{font-size:12px;letter-spacing:.13em;color:#337e79;font-weight:700}h1{font-size:clamp(22px,2.4vw,32px);letter-spacing:.04em;margin:10px 0}p{line-height:1.7}.heading p:last-child{margin:0;color:#536975;font-size:14px}h2{font-size:16px;margin:0 0 12px}h2 span,small{font-size:12px;color:#627980;font-weight:400;margin-left:10px}.workspace{display:grid;grid-template-columns:195px 1fr;border:1px solid #d1dcdb;border-radius:12px;overflow:hidden;background:white}aside{padding:22px 16px;border-right:1px solid #d1dcdb}.muted{font-size:12px;color:#59717b}.part{width:100%;margin:5px 0;display:flex;gap:12px;align-items:center;text-align:left;padding:14px}.part i{font-style:normal;font-size:24px;color:#267b75;width:28px}.tip{font-size:13px;line-height:2.2;border-top:1px solid #dbe4e2;margin-top:20px;padding-top:18px;color:#536b72}.toolbar,.statusbar,.inspector{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 18px}.toolbar>span{font-size:13px;color:#487b76}.toolbar>div{display:flex;gap:8px}.primary{background:#22776f;color:white;border-color:#22776f}.primary:hover{background:#175e58;color:white}canvas{display:block;width:100%;height:auto;touch-action:none}.timeline{height:4px;background:#cad8d6}#progress{height:100%;width:0;background:#eab759}.statusbar{font-size:13px;min-height:53px;border-bottom:1px solid #e1e7e6}#time{white-space:nowrap;font-variant-numeric:tabular-nums;color:#61717c}.inspector{font-size:13px;min-height:64px}.inspector label{display:flex;align-items:center;gap:8px}input[type=range]{width:130px;accent-color:#287e75}.shelf{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin:28px 0}.savebar{display:flex;gap:8px}input:not([type=range]){padding:11px 12px;border:1px solid #cbd7d5;border-radius:6px;background:white;min-width:0;max-width:100%}#projects{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.next p{font-size:13px;color:#59717b;margin:6px 0 12px}#intent{display:flex;flex-wrap:wrap;gap:6px}#intent button{font-size:12px}details{margin-top:16px;font-size:13px;color:#536975}footer{display:flex;justify-content:space-between;font-size:12px;color:#61717c;padding:20px 0;border-top:1px solid #d2dcd9}#intent button[aria-pressed=true]{background:#d0e9e4;border-color:#287e75}@media(max-width:800px){header{padding:0 20px;height:65px}header>span{display:none}main{padding:20px 12px}.heading{align-items:flex-start}.heading>button{max-width:125px}.workspace{grid-template-columns:1fr}aside{border-right:0;padding:14px}aside h2,aside>p,.tip{display:none}#palette{display:flex;gap:6px}.part{justify-content:center;padding:9px 4px;flex-direction:column;gap:0;font-size:12px}.part i{font-size:20px}.shelf{grid-template-columns:1fr;gap:24px}.toolbar,.inspector,.statusbar{padding:10px;flex-wrap:wrap}.inspector{gap:6px}footer{gap:20px}footer span{max-width:60%}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
/* Challenge mode */
[hidden]{display:none!important}.mode-tabs{display:flex;gap:6px;margin-bottom:18px}.mode-tabs button{border-color:transparent;background:transparent}.mode-tabs button[aria-pressed=true]{background:#203c48;color:white}.heading{margin-bottom:18px}.heading h1{font-size:28px}#courses{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:15px}#courses button{font-size:13px}#courses button[aria-current=true]{border:2px solid #24786e;background:#e8f4ef}#challenge-info{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:14px;font-size:14px}#challenge-info button{margin-left:auto;padding:7px 12px}#attempts{color:#65777e;font-size:13px}.hint-box{padding:12px 16px;border-left:3px solid #d6a446;background:#fff6de;font-size:14px;margin-top:0}.part span{display:flex;flex-direction:column;gap:4px}.part small{margin:0;color:#607781}.part[aria-pressed=true]{background:#fff3d9;border-color:#d2a040}.result{padding:20px;background:#f6eddd;border-top:1px solid #d9cdb5;display:flex;align-items:center;justify-content:space-between;gap:16px}.result.won{background:#dbefe8;border-color:#b5d9cc}.result strong{font-size:20px}.result p{font-size:14px;margin:6px 0 0}.result-actions{display:flex;gap:8px;flex-wrap:wrap}.inspector input[type=range]{width:180px}#angle-value{min-width:35px;font-variant-numeric:tabular-nums}#cancel-place{font-size:12px;width:100%;margin-top:8px}#progress-note{margin:10px 0}header{height:62px}main{padding-top:22px}
@media(min-width:1100px){main{max-width:1200px}.heading h1{font-size:26px}.workspace{grid-template-columns:175px 1fr}.toolbar{padding:10px 14px}aside{padding:18px 12px}}
@media(max-width:800px){.heading h1{font-size:22px}#challenge-info{gap:8px}#challenge-info button{margin-left:0}.part{width:auto;min-width:110px;flex-direction:row;gap:10px}#palette{flex-wrap:wrap}.toolbar>div{flex-wrap:wrap}.inspector input[type=range]{width:125px}.result{align-items:flex-start;flex-direction:column}.heading>button{max-width:140px}#courses button{font-size:12px}}
header .mode-tabs{margin:0}header{height:56px}main{padding-top:12px}.heading{margin-bottom:10px}.heading .eyebrow{margin:0 0 6px}.heading h1{margin:0 0 6px;font-size:24px}.heading p:last-child{font-size:13px}#courses{margin-bottom:8px}#courses button{padding:8px 12px}#challenge-info{margin-bottom:8px}#challenge-info button{padding:6px 10px}.board-wrap{background:#142b38;display:flex;justify-content:center}canvas{width:100%;height:auto}.mode-tabs button{padding:8px 12px}#progress-note{font-size:12px}.shelf{margin-top:20px}
@media(min-width:801px){canvas{width:min(100%,calc((100dvh - 425px)*1.60714));min-width:450px}.toolbar{padding:8px 12px}.statusbar{min-height:44px;padding:10px 12px}.inspector{min-height:54px;padding:8px 12px}.part{padding:10px}.tip{margin-top:14px;padding-top:12px}}
@media(max-width:800px){header{padding:0 12px}.brand{font-size:18px}.mode-tabs button{font-size:12px;padding:8px}.heading h1{font-size:20px}.heading>button{font-size:12px;padding:8px;max-width:100px}.heading .eyebrow{font-size:10px}#challenge-info{font-size:12px}.heading p:last-child{font-size:12px}}
.bonus-panel{background:#fff6df;border:1px solid #e2c780;border-radius:7px;padding:12px;margin:14px 0}.bonus-panel small{margin:0;color:#7b5b20;font-size:12px}.bonus-panel h3{font-size:15px;margin:7px 0}.bonus-panel p{font-size:13px;line-height:1.6;margin:6px 0}.bonus-panel span{font-size:12px;color:#726037}#gallery-motion{font-size:12px;margin-bottom:12px}#variant{margin-top:10px}.shelf{grid-template-columns:minmax(0,2fr) minmax(240px,1fr);gap:28px}#projects{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));align-items:start}.project-card{min-width:0;border:1px solid #c8d7d5;border-radius:9px;overflow:hidden;background:white}.project-preview{display:block;padding:0;border:0;border-radius:0;width:100%;overflow:hidden}.project-preview canvas{width:100%;min-width:0;height:auto;aspect-ratio:300/187;touch-action:auto}.project-card>strong,.project-meta{display:block;margin:10px 12px;overflow-wrap:anywhere}.project-card>strong{font-size:14px}.project-meta{font-size:12px;color:#56736c}.variant-button{font-size:12px;margin:0 12px 12px}.gallery-empty{font-size:14px;color:#59717b;grid-column:1/-1}.shelf>div{min-width:0}
@media(max-width:800px){.shelf{grid-template-columns:1fr}.bonus-panel{margin:8px 0 0;padding:9px}.bonus-panel h3{display:inline;margin-left:8px}.bonus-panel p{margin:4px 0}.bonus-panel span{display:inline}.bonus-panel small{display:inline}#projects{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}}
#courses button{display:flex;flex-direction:column;align-items:flex-start;gap:5px}#courses button small{margin:0;font-size:11px;color:#556c72;font-weight:400}#courses{gap:6px}#courses button[aria-current=true] small{color:#236c5f}

.restore-label{display:grid;gap:8px;margin-top:16px}.restore-label input{width:100%;font-size:13px}.help{background:white;border:1px solid #d1dcdb;border-radius:8px;padding:16px;margin-bottom:24px}.help p{max-width:800px}summary{cursor:pointer;font-weight:600;padding:6px 0}#angle-less,#angle-more{padding:8px 12px;min-width:40px;min-height:40px}.bench{min-width:0}
@media(max-width:800px){#courses{flex-wrap:nowrap;overflow-x:auto;padding-bottom:8px}#courses button{flex-shrink:0;min-height:54px}.inspector label{flex-wrap:wrap}.inspector input[type=range]{width:100px}.toolbar button{min-height:44px}.statusbar #status{flex-basis:100%}.bonus-panel p{font-size:12px}.savebar{flex-wrap:wrap}.savebar input{flex:1;min-width:160px}}