[hidden]{display:none!important}
:root{--paper:#f4f5ef;--white:#fff;--ink:#20382d;--muted:#5a6d61;--line:#d8dfd4;--green:#285e43;--mint:#dcedd7;--orange:#bd481e;--orange-light:#fff0df;--blue:#2e617e;--code:#172a27;--radius:16px;font-family:Barlow,system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,summary,select,label.button{touch-action:manipulation}button{cursor:pointer}a{color:inherit}button:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible,canvas:focus-visible{outline:3px solid #bd481e;outline-offset:4px}button{border:0}h1,h2,h3,p{margin-top:0}h1,h2{font-family:'Barlow Condensed',system-ui,sans-serif;letter-spacing:-.015em;line-height:1}h1{font-size:clamp(2.5rem,4.5vw,4.2rem);margin-bottom:12px;font-weight:700}h2{font-size:2rem;margin-bottom:16px}h3{font-size:1.12rem;margin-bottom:10px}p{line-height:1.65}img{max-width:100%}.header{height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:48px;padding:0 max(28px,calc((100vw - 1320px)/2));background:var(--paper)}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-family:'Barlow Condensed',sans-serif;font-size:23px;font-weight:800;letter-spacing:.02em;line-height:.93;flex-shrink:0}.brand img{width:45px;transform:rotate(-20deg)}.brand-bottom{display:block}.header nav{display:flex;gap:29px;align-items:center;height:100%}.header nav a{font-weight:600;text-decoration:none;height:100%;display:flex;align-items:center;position:relative;gap:6px;white-space:nowrap}.header nav a.active:after{content:'';height:3px;background:var(--green);position:absolute;bottom:0;left:0;right:0}.nav-count{font-size:10px;padding:2px 5px;background:var(--mint);border-radius:4px}.profile{margin-left:auto;display:flex;align-items:center;gap:16px;font-weight:700;white-space:nowrap}.avatar{background:var(--green);color:white;border-radius:50%;width:38px;height:38px;font-weight:700}main{max-width:1320px;min-height:75vh;margin:auto;padding:40px 28px 54px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:27px}.page-heading p{color:var(--muted);margin-bottom:0}.trail-label{font-size:13px;color:var(--muted)}.primary,.secondary,.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;padding:12px 20px;border-radius:8px;font-weight:700;text-decoration:none;min-height:46px}.primary{background:var(--orange);color:#fff}.primary:hover{background:#9c3815}.secondary{background:#e6eadf;color:var(--ink)}.secondary:hover{background:#d9e1d3}.dark-button{background:var(--green);color:white}.text-button{background:none;color:var(--green);font-weight:600;padding:8px 0;text-underline-offset:4px}.text-button:hover{text-decoration:underline}.muted{color:var(--muted)}.small{font-size:13px}.pill{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;background:var(--mint);border-radius:6px;font-size:12px;font-weight:700}.defense-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start}.battle{background:#e0e7d6;border-radius:var(--radius);overflow:hidden}.battle-top{display:flex;justify-content:space-between;gap:12px;align-items:center;background:#254a38;color:white;padding:16px 20px}.battle-title{font-weight:700}.battle-title span{display:block;font-size:12px;font-weight:400;color:#d2e6cb;margin-top:3px}.battle-stats{display:flex;gap:17px;font-weight:700;font-size:14px}.stat-heart{color:#ffd1c4}.stat-gold{color:#ffe39c}.canvas-wrap{position:relative;background:#28b96e;line-height:0;isolation:isolate}canvas{display:block;width:100%;height:auto;aspect-ratio:12/8;touch-action:manipulation}.map-caption{position:absolute;top:13px;left:15px;background:#214931e8;border-radius:6px;padding:8px 11px;color:white;font-size:11px;line-height:1.2;font-weight:600;pointer-events:none}.map-overlay{position:absolute;inset:0;background:#193629b8;display:flex;align-items:center;justify-content:center;padding:22px;line-height:normal}.map-overlay[hidden]{display:none}.overlay-panel{max-width:365px;background:var(--paper);border-radius:14px;padding:28px;text-align:center;box-shadow:0 18px 70px #132c2240}.overlay-panel h2{font-size:36px}.overlay-panel p{font-size:14px}.battle-controls{padding:13px 16px;display:flex;align-items:center;gap:9px;flex-wrap:wrap;background:#edf0e7}.battle-controls .primary{margin-left:auto}.control-button{border-radius:7px;background:#dfe5d8;padding:10px 12px;font-weight:600;min-height:42px}.battle-hint{margin:0;padding:0 18px 14px;font-size:13px;line-height:1.5;color:#3a5544;min-height:38px}.arsenal{margin-top:22px}.section-line{display:flex;justify-content:space-between;align-items:baseline;gap:10px}.section-line h2{font-size:24px}.tower-list{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.tower-card{display:flex;flex-direction:column;text-align:left;border:1px solid var(--line);border-radius:12px;padding:12px;background:transparent;gap:4px;position:relative;min-height:130px;color:var(--ink)}.tower-card img{width:48px;height:48px;object-fit:contain;margin-bottom:4px}.tower-card strong{font-size:14px}.tower-card small{font-size:11px;color:var(--muted)}.tower-card.selected{background:#e1ecd8;border-color:#4e7a57;box-shadow:inset 0 0 0 1px #4e7a57}.tower-card .cost{position:absolute;top:15px;right:12px;font-size:12px;font-weight:700}.mission-panel{background:white;border-radius:var(--radius);padding:25px 24px}.mission-panel h2{font-size:32px;margin:18px 0 12px}.mission-panel p{font-size:14px;color:var(--muted);line-height:1.6}.mission-panel .primary{width:100%;margin-top:12px}.mini-code{background:var(--code);color:#cce9cd;padding:15px;border-radius:10px;font-size:12px;line-height:1.9;overflow:auto;font-family:'JetBrains Mono',monospace;white-space:pre}.mission-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;margin-bottom:8px}.progress{height:6px;background:#e1e6da;border-radius:5px;overflow:hidden;margin:13px 0}.progress i{display:block;height:100%;background:var(--green);border-radius:5px}.campaign-progress{margin-top:22px;padding:0 4px}.campaign-progress p{font-size:13px;line-height:1.5;color:var(--muted)}.reward-row{display:flex;align-items:center;gap:12px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}.reward-row img{width:37px}.reward-row span{font-size:12px;line-height:1.5}.reward-row strong{display:block;font-size:14px}.quick-start{margin-top:27px;display:flex;gap:30px;padding:20px 0;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.quick-start strong{color:var(--ink);display:block;margin-bottom:5px}.quick-start>div{flex:1}.chapter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}.chapter{background:white;border-radius:14px;overflow:hidden;display:flex;flex-direction:column}.chapter-scene{height:92px;background:#d9e8ce;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;gap:12px}.chapter-scene img{width:58px;height:58px;object-fit:contain;filter:drop-shadow(0 5px 0 #23442412)}.chapter-scene .region-number{position:absolute;left:15px;top:12px;font-size:13px;font-weight:700;color:#3d5c44}.chapter-body{padding:20px;display:flex;flex-direction:column;flex:1}.chapter-body h2{font-size:27px;margin-bottom:6px}.chapter-body p{font-size:13px;color:var(--muted);line-height:1.5}.chapter-body .text-button{margin-top:auto;text-align:left}.chapter-body .progress{margin-top:15px}.chapter-complete{background:#274f39;color:white;position:absolute;right:12px;top:12px;padding:3px 7px;border-radius:4px;font-size:11px}.lesson-list{display:grid;gap:12px;max-width:860px;margin-top:25px}.lesson-row{background:white;border-radius:12px;padding:20px;display:flex;align-items:center;gap:18px;text-decoration:none;border:1px solid transparent}.lesson-row:hover{border-color:#71966a}.lesson-number{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;background:var(--mint);font-weight:700;flex-shrink:0}.lesson-row h3{margin:0 0 6px}.lesson-row p{margin:0;font-size:13px;color:var(--muted)}.lesson-row .row-end{margin-left:auto;font-size:12px;white-space:nowrap}.back-link{display:inline-block;margin-bottom:24px;font-size:14px;color:var(--green);text-decoration:none;font-weight:600}.recall{background:#e3ebd9;border-radius:12px;padding:18px 20px;line-height:1.6}.recall strong{display:block}.workspace{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:24px}.workspace-title{margin-bottom:22px;display:flex;align-items:center;justify-content:space-between;gap:18px}.workspace-title h1{font-size:38px}.lesson-paper{background:white;padding:26px;border-radius:14px;min-width:0}.lesson-paper p{font-size:15px;line-height:1.8}.lesson-paper h2{font-size:26px;margin-top:25px}.lesson-paper h2:first-child{margin-top:0}.lesson-paper pre,.guide pre{white-space:pre-wrap;overflow-wrap:anywhere;font-family:'JetBrains Mono',monospace;font-size:12px;line-height:1.8;background:#edf1e7;padding:16px;border-radius:9px;color:#254c35}.lesson-paper .mission-task{background:var(--orange-light);padding:17px;border-radius:9px;color:#743819}.example-case{font-size:12px;padding:10px 0;border-bottom:1px solid var(--line);font-family:'JetBrains Mono',monospace;overflow-wrap:anywhere;line-height:1.8}.tab-bar{display:flex;gap:5px;margin-bottom:19px;border-bottom:1px solid var(--line)}.tab-bar button{background:none;padding:10px 14px;font-weight:600;color:var(--muted);border-bottom:2px solid transparent}.tab-bar button.active{color:var(--green);border-color:var(--green)}details{margin:12px 0}summary{cursor:pointer;font-weight:600;line-height:1.5;padding:8px 0}details p{margin:8px 0 16px}.editor-panel{min-width:0}.editor-shell{background:var(--code);color:#e0efdf;border-radius:12px;overflow:hidden}.editor-top{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid #3b5149;font-size:12px}.editor-top .runtime{margin-left:auto;color:#b4cdb7;font-size:11px}.file-dot{width:7px;height:7px;background:#e9ba72;border-radius:50%}.editor-area{display:flex;min-height:300px}.line-numbers{padding:18px 10px 18px 14px;min-width:42px;text-align:right;font:13px/1.9 'JetBrains Mono',monospace;color:#8ea497;white-space:pre;overflow:hidden;user-select:none}.editor-area textarea{width:100%;min-height:300px;resize:vertical;border:0;background:transparent;color:#e4f3df;padding:18px 15px 18px 5px;font:13px/1.9 'JetBrains Mono',monospace;tab-size:4;white-space:pre;overflow:auto;outline-offset:-4px;caret-color:#ffcf82}.editor-toolbar{background:#213a30;padding:10px 14px;display:flex;gap:6px;align-items:center}.editor-toolbar button{font-size:12px;background:#335343;color:#e1efde;border-radius:5px;padding:8px 10px}.editor-toolbar span{margin-left:auto;font-size:11px;color:#b4cbb5}.run-bar{display:flex;gap:8px;margin:12px 0}.run-bar .primary{flex:1}.run-bar button{font-size:13px;padding-left:14px;padding-right:14px}.results{background:white;border-radius:12px;padding:20px;min-height:170px}.results h3{font-size:15px;display:flex;justify-content:space-between;align-items:center}.results p{font-size:13px;color:var(--muted)}.test-row{padding:12px 0;border-top:1px solid var(--line);font-size:12px;line-height:1.8;overflow-wrap:anywhere}.test-row code{font-family:'JetBrains Mono',monospace;font-size:11px}.pass{color:#1c6840}.fail{color:#a63d2c}.error-output{white-space:pre-wrap;font:12px/1.6 'JetBrains Mono',monospace;overflow-wrap:anywhere;color:#a63d2c}.success-banner{background:#dcebd3;padding:18px;border-radius:10px;margin-bottom:15px}.success-banner h3{margin:0 0 7px}.success-banner p{margin:0 0 12px;font-size:13px}.solution-warning{background:#fff0df;color:#763c23;padding:12px;border-radius:8px;font-size:13px}.library-controls{display:flex;gap:10px;margin:24px 0 18px;flex-wrap:wrap}.search{padding:13px 16px;border:1px solid #bdcbb7;border-radius:8px;background:white;min-width:220px;flex:1}.library-controls select{background:white;padding:12px;border:1px solid #bdcbb7;border-radius:8px;max-width:100%;color:var(--ink)}.problem-table{width:100%;border-collapse:collapse;background:white;border-radius:12px;overflow:hidden}.problem-table th{text-align:left;font-size:12px;background:#e3eadc;padding:14px 18px}.problem-table td{border-bottom:1px solid #e6eadd;padding:15px 18px;font-size:14px}.problem-table a{font-weight:600;text-underline-offset:4px}.problem-table td:last-child{width:130px}.problem-check{background:#e5eddd;border-radius:6px;padding:8px 10px;min-height:38px;font-size:12px;font-weight:600;color:var(--green)}.pagination{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:20px;font-size:13px}.guide-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:35px;margin-top:30px}.guide-nav{position:sticky;top:20px;align-self:start;display:grid;gap:3px}.guide-nav a{text-decoration:none;font-size:14px;padding:9px;border-radius:5px}.guide-nav a:hover{background:var(--mint)}.guide{max-width:850px}.guide section{padding:0 0 28px;margin:0 0 28px;border-bottom:1px solid var(--line);scroll-margin-top:24px}.guide h2{font-size:32px}.guide h3{margin-top:22px}.guide p,.guide li{font-size:15px;line-height:1.75}.guide ul{padding-left:22px}.pattern-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:25px}.pattern{background:white;padding:23px;border-radius:13px}.pattern h2{font-size:27px}.pattern p{font-size:14px}.pattern .cue{font-size:17px;color:var(--green);font-weight:700;line-height:1.4}.pattern .trap{color:#7e4229;font-size:13px;border-top:1px solid var(--line);padding-top:12px;margin-bottom:0}.review-list{max-width:850px}.empty-state{padding:40px;background:white;border-radius:14px;max-width:760px}.empty-state p{max-width:60ch}.tabs-inline{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}.tabs-inline a{padding:9px 14px;border-radius:6px;text-decoration:none;background:#e5eadc;font-size:13px;font-weight:600}.tabs-inline a.active{background:var(--green);color:white}.loading{padding:80px;text-align:center;color:var(--muted)}footer{max-width:1264px;border-top:1px solid var(--line);padding:24px 0;margin:auto;display:flex;gap:24px;align-items:center;font-size:12px;color:var(--muted)}footer span{margin-right:auto}footer a{text-underline-offset:4px}footer button{font-size:12px}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);padding:13px 21px;background:#223f2e;color:white;box-shadow:0 8px 35px #12271a33;border-radius:9px;font-size:14px;max-width:90vw;opacity:0;pointer-events:none;z-index:10;transition:opacity .2s,transform .2s}#toast.visible{opacity:1;transform:translate(-50%,0)}dialog{max-width:520px;width:calc(100% - 32px);border:0;border-radius:18px;padding:32px;background:var(--paper);color:var(--ink);box-shadow:0 20px 80px #15312040}dialog::backdrop{background:#152d24aa}.dialog-close{float:right;background:#dfe7d5;border-radius:50%;width:30px;height:30px;font-size:23px}.backup-actions{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}dialog h2{font-size:36px;line-height:1.1;margin-top:10px}dialog p{font-size:14px}.skip{position:absolute;left:12px;top:-80px;background:white;padding:14px;z-index:100}.skip:focus{top:12px}.kbd-help{font-size:12px;color:var(--muted);margin:10px 0}.badge-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}.badge-row .pill{background:#e1e9d9}.battle-small-help{font-size:12px;margin-top:14px;color:var(--muted);line-height:1.6}.tower-info{padding:12px 16px;background:#e3eadb;border-radius:9px;margin-top:10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12px}.tower-info button{background:#fff;padding:8px 12px;border-radius:5px;color:var(--ink);font-size:12px;font-weight:600}.tower-info>span{margin-right:auto}.about-hero{display:flex;gap:28px;align-items:center;background:#e1ebd6;padding:25px;border-radius:14px;margin-bottom:30px}.about-hero img{width:100px;image-rendering:auto}.code-shortcuts{display:flex;gap:5px;flex-wrap:wrap;padding:10px 0}.code-shortcuts button{font:12px 'JetBrains Mono',monospace;background:#e2e8da;padding:9px 11px;border-radius:5px;color:var(--ink)}
@media(min-width:1440px){main{padding-top:46px}.canvas-wrap{min-height:400px}}@media(max-width:1080px){.header{gap:30px;padding:0 24px}.header nav{gap:20px}.defense-grid{grid-template-columns:minmax(0,1fr) 275px;gap:18px}.mission-panel{padding:22px 19px}.chapter-grid{grid-template-columns:repeat(3,1fr)}.tower-card{padding:10px}.tower-card .cost{right:8px;font-size:11px}.workspace{gap:18px}.lesson-paper{padding:21px}.editor-toolbar span{display:none}footer{margin:0 28px}}@media(max-width:800px){.header{height:auto;min-height:94px;flex-wrap:wrap;gap:10px;padding:18px 20px 0}.brand{font-size:21px}.brand img{width:39px}.header nav{order:3;width:100%;height:47px;justify-content:space-between;gap:14px;overflow:auto}.header nav a{font-size:14px}.profile{margin-left:auto}.defense-grid{grid-template-columns:minmax(0,1fr)}main{padding:28px 20px 40px}.page-heading{margin-bottom:20px}.page-heading h1{font-size:43px}.page-heading .trail-label{display:none}.mission-panel{display:grid;grid-template-columns:1fr auto;gap:0 20px;padding:22px}.mission-panel .mini-code{display:none}.mission-panel h2{font-size:29px;margin:8px 0}.mission-panel .mission-meta{grid-column:1/-1}.mission-panel p{grid-column:1;margin-bottom:8px}.mission-panel .primary{grid-column:2;grid-row:2/5;align-self:center;width:auto;margin:0}.mission-panel .reward-row{display:none}.campaign-progress{margin-top:18px}.campaign-progress .progress{margin:8px 0}.quick-start{gap:20px}.workspace{grid-template-columns:1fr}.workspace-title h1{font-size:34px}.editor-area,.editor-area textarea{min-height:260px}.chapter-grid{grid-template-columns:repeat(2,1fr);gap:13px}.guide-layout{grid-template-columns:1fr;gap:20px}.guide-nav{position:static;display:flex;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:18px}.guide-nav a{font-size:12px;background:#e3eadc}.pattern-grid{gap:13px}.tower-list{gap:8px}.tower-card{min-height:122px}footer{margin:0 20px;gap:16px;flex-wrap:wrap}.battle-top{padding:13px 16px}.battle-stats{gap:12px;font-size:13px}}@media(max-width:480px){.header{padding-left:16px;padding-right:16px}.header nav{gap:16px}.profile{font-size:13px}.avatar{width:32px;height:32px}.page-heading h1{font-size:39px}.page-heading p{font-size:14px}.page-heading{gap:12px;align-items:flex-start}.page-heading .secondary{padding:10px 12px;min-height:40px;font-size:12px}.battle-title{font-size:13px}.battle-title span{font-size:10px}.battle-stats{font-size:12px;gap:9px}main{padding-left:14px;padding-right:14px}.battle-controls{padding:10px;gap:6px}.battle-controls .primary{font-size:12px;padding:10px 13px;min-height:41px}.control-button{padding:9px;font-size:12px}.battle-hint{font-size:12px;padding-left:12px}.tower-list{grid-template-columns:repeat(2,1fr)}.tower-card{min-height:105px;padding:12px 12px 12px 61px;justify-content:center}.tower-card img{position:absolute;left:10px;top:25px;width:43px;height:43px}.tower-card .cost{top:10px;right:10px}.tower-card strong{font-size:13px}.tower-card small{font-size:10px}.tower-card .cost{font-size:10px}.mission-panel{display:block}.mission-panel .primary{margin-top:10px;width:100%}.quick-start{gap:15px;font-size:12px}.quick-start>div:nth-child(3){display:none}.chapter-body{padding:16px}.chapter-body h2{font-size:25px}.chapter-body p{font-size:12px}.chapter-scene{height:80px}.chapter-scene img{width:45px}.chapter-scene .region-number{font-size:10px;left:9px;top:9px}.chapter-body .text-button{font-size:12px}.chapter-complete{font-size:9px;right:8px;top:8px}.lesson-row{padding:16px;gap:12px}.lesson-row h3{font-size:15px}.lesson-row .row-end{font-size:10px}.lesson-number{width:33px;height:33px;font-size:13px}.workspace-title{display:block}.workspace-title .pill{margin-top:3px}.lesson-paper{padding:21px 19px}.lesson-paper p{font-size:14px}.pattern-grid{grid-template-columns:1fr}.pattern{padding:22px}.problem-table th,.problem-table td{padding:12px 10px}.problem-table td{font-size:12px}.problem-table th:nth-child(2),.problem-table td:nth-child(2){display:none}.problem-table td:last-child{width:90px}.problem-check{font-size:10px;padding:7px}.pagination{font-size:11px}.pagination .secondary{padding:8px 12px;min-height:40px}.about-hero{padding:18px;gap:15px}.about-hero img{width:65px}.about-hero h2{font-size:29px}.map-caption{font-size:9px;padding:6px 8px;top:9px;left:10px}.overlay-panel{padding:22px}.overlay-panel h2{font-size:30px}.overlay-panel p{font-size:12px}.overlay-panel .primary{min-height:40px;font-size:12px}.editor-toolbar{padding:10px}.editor-toolbar button{font-size:11px}.run-bar .primary{padding:10px;font-size:12px}.run-bar .secondary{padding:10px;font-size:12px}.run-bar{gap:6px}.line-numbers{font-size:12px;min-width:32px;padding-left:8px}.editor-area textarea{font-size:12px;line-height:1.9}.line-numbers{line-height:1.9}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

.mobile-only{display:none}@media(max-width:800px){.mobile-only{display:inline-flex}.mobile-jumps{display:flex;gap:9px;margin:14px 0 20px}.editor-area textarea,.line-numbers{font-size:16px}.editor-area textarea{min-height:310px}.page-heading .home-start{font-size:12px;padding:10px 12px;white-space:nowrap}}
