:root{color-scheme:dark;--bg:#101311;--sidebar:#131713;--panel:#171c18;--line:#2b322c;--muted:#89958b;--text:#e4e9df;--green:#c1f58b;--green-dim:#24331e;--mono:'Cascadia Code','Consolas','SFMono-Regular',monospace;--sans:Inter,'Segoe UI','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.6}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button,input,textarea{font:inherit}button{cursor:pointer;color:inherit}button{background:none;border:0}button:disabled{opacity:.3;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--green);outline-offset:3px}button:hover:not(:disabled){filter:brightness(1.14)}a{color:inherit;text-decoration:none}svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.icon-defs{position:absolute;width:0;height:0;overflow:hidden}[hidden]{display:none!important}.green{color:var(--green)}.sidebar{position:fixed;inset:0 auto 0 0;width:248px;background:var(--sidebar);border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:12px;padding:28px 24px 31px;font-family:var(--mono);font-size:25px;font-weight:700;line-height:1.2;letter-spacing:-1px}.brand-icon{height:40px;width:40px;display:grid;place-items:center;color:var(--green);background:var(--green-dim);border:1px solid #4b6039;border-radius:9px}.brand-icon svg{width:27px;height:27px}.brand-lab{color:var(--green);font-size:20px;margin-left:6px}.brand small{display:block;font:11px var(--sans);letter-spacing:3px;margin-top:8px;color:var(--muted)}.course-heading{display:flex;align-items:center;justify-content:space-between;padding:0 23px 16px;color:#aab3a8;font-size:13px}.open-badge{color:#a6c894;font-size:11px;background:#233020;padding:2px 7px;border-radius:4px}#lesson-nav{overflow-y:auto;flex:1;padding:0 13px 18px;scrollbar-width:thin;scrollbar-color:#344030 transparent}.chapter-heading{font-size:11px;color:#798777;padding:19px 12px 10px;letter-spacing:1px;font-weight:500}.chapter-heading:first-child{padding-top:3px}.lesson-link{width:100%;display:flex;align-items:center;gap:11px;border:1px solid transparent;border-radius:6px;text-align:left;color:#a4aea2;padding:9px 11px;margin:2px 0;line-height:1.6;font-size:13px}.lesson-link:hover{background:#202720}.lesson-link.active{background:#283421;color:var(--green);border-color:#445632}.nav-number{font:12px var(--mono);color:#70806e}.active .nav-number{color:var(--green)}.nav-check{margin-left:auto;font-size:13px;color:var(--green)}.nav-circle{width:12px;height:12px;border:1px solid #3c4839;border-radius:50%;margin-left:auto;flex-shrink:0}.active .nav-circle{border:3px solid var(--green)}.sidebar-bottom{border-top:1px solid var(--line);padding:20px 22px;display:flex;gap:13px;font-size:12px;color:#a7b19e}.sidebar-bottom 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28px;border-bottom:1px solid var(--line);gap:20px}.eyebrow{font:10px var(--mono);letter-spacing:2px;color:#91a284}h1{font-size:27px;letter-spacing:1px;line-height:1.4;font-weight:600;margin:8px 0 8px}.overview p{font-size:13px;color:var(--muted);margin:0}.journey-stats{display:flex;align-items:center;gap:25px}.journey-stats strong{display:block;font:30px var(--mono);font-weight:500;white-space:nowrap}.journey-stats strong span{font-size:13px;color:#899582}.journey-stats small{display:block;font-size:11px;color:var(--muted);margin-top:6px}.journey-stats .xp-value{color:var(--green)}.xp-value span{color:#9dc777!important}.stat-divider{width:1px;height:33px;background:var(--line)}.progress-ring{height:65px;width:65px;border-radius:50%;background:conic-gradient(var(--green) 0%,#2a3527 0);display:grid;place-items:center;margin-left:5px;position:relative}.progress-ring:before{content:'';position:absolute;inset:4px;background:var(--bg);border-radius:50%}.progress-ring span{z-index:1;font:13px var(--mono);color:#c8d9b9}.lesson-heading{display:flex;justify-content:space-between;align-items:center;margin:25px 0 20px;gap:10px}.lesson-title-group{display:flex;align-items:center;gap:15px}.level-number{font:32px var(--mono);color:var(--green);background:linear-gradient(135deg,#273820,#172019);border:1px solid #394b2e;border-radius:9px;display:grid;place-items:center;width:58px;height:62px}.lesson-eyebrow{display:flex;align-items:center;gap:9px;font:10px var(--mono);color:var(--muted);letter-spacing:.6px}.difficulty{font:10px var(--sans);color:#a2c184;border:1px solid #38472e;border-radius:3px;padding:0 5px}h2{font-size:23px;line-height:1.4;font-weight:600;margin:4px 0 0}.lesson-reward{display:flex;align-items:center;gap:12px;color:#879280;font:12px var(--mono)}#reward{color:var(--green);background:#24331e;border-radius:4px;padding:4px 8px;white-space:nowrap}.heading-divider{height:13px;width:1px;background:var(--line);margin:0 2px}.icon-button{width:28px;height:28px;border:1px solid var(--line);border-radius:5px;font-size:22px;line-height:1;display:grid;place-items:center}.lesson-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:18px;margin-bottom:20px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:9px;overflow:hidden}.mission-panel,.knowledge-panel{padding:18px 20px}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.panel-heading h3,.console-heading h3{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:500;margin:0}.panel-symbol{color:var(--green);font-size:21px;line-height:1}.small-label{font:10px var(--mono);letter-spacing:1px;color:#63735e}.mission-panel p,.knowledge-panel p{font-size:14px;line-height:1.85;color:#aeb8a8;margin:12px 0}.goal-caption{font-size:11px;color:#8b9c7d;margin:13px 0 7px}.goals{display:flex;flex-wrap:wrap;gap:6px 16px}.goal-item{display:flex;align-items:center;gap:7px;font:12px var(--mono);color:#c4d0bd}.goal-box{width:13px;height:13px;border:1px solid #536447;border-radius:3px;display:grid;place-items:center;font-size:10px}.goal-item.met{color:var(--green)}.met .goal-box{background:var(--green);color:#15210c;border-color:var(--green)}.knowledge-panel{background:linear-gradient(105deg,#1b231a,#171c18)}.knowledge-panel h3 svg{color:#a6c58e;width:16px}.knowledge-tag{color:#a8c78d;background:#2a3525;border-radius:4px;padding:1px 7px;font:11px var(--mono)}.syntax-example{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid #303d2a;border-radius:5px;padding:8px 12px;background:#121a12}.syntax-example code{font:13px var(--mono);color:var(--green)}.syntax-example span{font-size:11px;color:#6f8263}.lab-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,1fr);gap:20px}.editor-panel{display:flex;flex-direction:column;background:#111612;min-height:437px}.editor-heading{height:47px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#191f19}.file-tab{height:47px;border-top:2px solid var(--green);background:#121713;display:flex;align-items:center;gap:9px;padding:0 18px;border-right:1px solid var(--line);font:12px var(--mono)}.file-icon{color:var(--green);font-size:18px}.file-dot{width:5px;height:5px;border-radius:50%;background:#718265;margin-left:16px}.editor-language{font:10px var(--mono);color:#6f7e68;padding:0 15px}.editor-toolbar{display:flex;align-items:center;justify-content:space-between;padding:12px 17px 9px;font-size:11px;color:#74876b}.editor-toolbar>span{display:flex;align-items:center;gap:6px}.editor-toolbar button{color:#899780;font-size:11px;display:flex;align-items:center;gap:5px}.editor-toolbar svg{width:12px;height:12px}.code-editor{display:flex;min-height:254px;flex:1;position:relative;overflow:hidden;padding-top:7px}.line-numbers{width:50px;flex-shrink:0;text-align:right;padding-right:15px;font:13px/26px 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svg{width:16px}.machine-panel{display:flex;flex-direction:column}.machine-panel>.panel-heading{padding:15px 18px;border-bottom:1px solid var(--line)}.machine-panel h3 svg{color:#a5b696}.live-label{display:flex;align-items:center;gap:6px;font:10px var(--mono);color:#8fbe73;letter-spacing:1px}.machine-tabs{display:flex;align-items:center;gap:20px;margin:0 18px;border-bottom:1px solid var(--line)}.machine-tabs button{font-size:12px;color:#83917a;padding:11px 2px 9px;border-bottom:2px solid transparent}.machine-tabs button[aria-selected=true]{color:var(--green);border-bottom-color:var(--green)}.machine-tabs>span{margin-left:auto;font:10px var(--mono);color:#63765a}.register-table-head,.register-row{display:grid;grid-template-columns:1fr 1fr .7fr;gap:10px;padding:5px 18px;align-items:center;font:12px var(--mono)}.register-table-head{font:10px var(--sans);color:#74856a;padding-top:11px;padding-bottom:8px}.register-table-head span:last-child,.register-row span:last-child{text-align:right}.register-row{padding-top:4px;padding-bottom:4px;color:#c1ceba;transition:background .2s}.register-row:nth-child(even){background:#ffffff02}.register-row.changed{background:#40542a55}.register-row .reg-name{font-weight:600;color:#aabf9a}.register-row .reg-hex{color:#cfe4bc;letter-spacing:1px}.register-row.changed .reg-hex{color:var(--green)}.register-row .reg-dec{color:#778c69;font-size:11px}.reg-description{font:9px var(--sans);color:#607257;margin-left:7px;font-weight:400}.byte-detail{display:flex;align-items:center;justify-content:space-between;gap:5px;padding:8px 18px 9px;color:#657a5b;font-size:10px}.byte-detail code{font-size:10px}.byte-detail b{color:#b4c9a4;font-weight:400;padding-left:5px}.flags-section{border-top:1px solid var(--line);padding:11px 18px 12px;margin-top:auto}.flags-title{font-size:11px;color:#9eb18d;display:flex;justify-content:space-between;margin-bottom:8px}.flags-title span{font:9px var(--mono);color:#5b7050}.flags{display:grid;grid-template-columns:repeat(6,1fr);gap:7px}.flag{background:#111810;border:1px solid #2b3a24;border-radius:4px;text-align:center;padding:4px 0;font:10px var(--mono);color:#738567;display:flex;align-items:center;justify-content:center;gap:6px}.flag b{font-size:12px;color:#acbca0;font-weight:400}.flag.on{border-color:#6c8d48;background:#2a3b1f;color:#c4ed97}.flag.on b{color:var(--green)}.cpu-footer{border-top:1px solid var(--line);background:#151c14;color:#647859;display:flex;justify-content:space-between;gap:10px;padding:8px 18px;font-size:10px}.memory-controls{display:flex;gap:8px;align-items:center;margin:13px 18px;font-size:11px;color:#8ba079}.memory-controls input{width:65px;background:#10180f;border:1px solid #3b4c30;padding:4px 7px;border-radius:4px;color:var(--green);font-family:var(--mono)}.memory-controls button{border:1px solid #3b4c30;border-radius:4px;padding:3px 8px}.memory-label,.memory-row{display:flex;justify-content:space-between;gap:8px;padding:6px 18px;font:11px var(--mono);color:#708a60}.memory-label{font-size:10px}.memory-row span{color:#baceab;word-spacing:5px}.memory-note{font-size:10px;color:#6d825f;margin:13px 18px}.console-panel{margin-top:20px;background:#121813}.console-heading{display:flex;align-items:center;gap:12px;padding:11px 17px;border-bottom:1px solid var(--line);background:#1a201a}.console-heading h3{font-size:12px}.terminal-icon{color:#9eba86;font:15px var(--mono)}#console-badge{font-size:10px;padding:0 6px;border:1px solid #35422e;border-radius:4px;color:#7f9371}.console-heading button{margin-left:auto;color:#708563;font-size:11px}.console-output{padding:13px 18px;min-height:86px;max-height:180px;overflow:auto;scrollbar-width:thin;font:11px/1.9 var(--mono)}.log-entry{display:flex;gap:12px;align-items:baseline}.log-time{color:#52674a;font-size:10px;flex-shrink:0}.log-message{color:#8c9f80;overflow-wrap:anywhere}.log-entry.good .log-message{color:var(--green)}.log-entry.error .log-message{color:#f49b86}.log-prefix{color:#a8ce8d;margin-right:10px}.page-footer{display:flex;justify-content:space-between;gap:15px;color:#5d7153;font-size:10px;padding:19px 1px 0}.page-footer>span:first-child{display:flex;gap:7px;align-items:center}.page-footer .status-dot{background:#5d7f49;width:4px;height:4px}.success-banner{display:flex;align-items:center;justify-content:space-between;gap:15px;background:#263a1b;border-top:1px solid #4f6f33;padding:16px 19px}.success-banner strong{display:block;color:var(--green);font-size:16px}.success-banner span{display:block;color:#a6be92;font-size:12px;margin-top:3px}.success-banner svg{fill:none}dialog{padding:0;border:1px solid #495f39;border-radius:12px;background:#192118;color:var(--text);max-width:700px;width:calc(100% - 32px);max-height:85vh;box-shadow:0 25px 100px #0008}dialog::backdrop{background:#030803bd;backdrop-filter:blur(5px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid var(--line)}.dialog-heading h2{font-size:20px;margin:0}#dialog-content{padding:20px 24px;color:#b2c2a6;font-size:14px;line-height:1.9}#dialog-content p{margin-top:0}#dialog-content h3{font-size:15px;color:var(--green);margin-bottom:8px}#dialog-content pre{background:#0e160d;padding:16px;border-radius:5px;color:var(--green);font:13px/1.8 var(--mono);overflow:auto}#dialog-content table{border-collapse:collapse;width:100%;font-size:12px}#dialog-content th,#dialog-content td{padding:9px 8px;border-bottom:1px solid #304027;text-align:left}#dialog-content th{color:#d8e4cd}#dialog-content td:first-child{font-family:var(--mono);color:var(--green)}.dialog-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.help-note{font-size:12px;color:#829c70}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:11px 22px;background:#ceeeb3;color:#1a2b12;border-radius:7px;z-index:100;box-shadow:0 5px 25px #0005;font-size:13px}.mobile-menu{display:none}
@media(min-width:1600px){main{padding-top:40px}.overview{padding-bottom:35px}.lesson-heading{margin-top:30px}.code-editor{min-height:300px}.editor-panel{min-height:480px}.register-row{padding-top:6px;padding-bottom:6px}.mission-panel p,.knowledge-panel p{font-size:15px}}
@media(max-width:1200px){.sidebar{width:218px}.workspace{margin-left:218px}.brand{padding-left:20px}.topbar{padding:0 24px}main{padding:25px 24px 15px}.journey-stats{gap:15px}.progress-ring{display:none}.lesson-grid{gap:14px}.lab-grid{gap:14px;grid-template-columns:minmax(0,1.2fr) minmax(290px,1fr)}.shortcut{display:none}.run-toolbar{gap:7px;padding:12px 10px}.lesson-reward{gap:8px}.reg-description{display:none}.lesson-link{font-size:12px}.knowledge-panel p,.mission-panel p{font-size:13px}}
@media(max-width:1000px){.sidebar{width:200px}.workspace{margin-left:200px}.brand{font-size:22px;gap:9px;padding-left:17px}.brand-icon{width:35px;height:35px}.brand-lab{font-size:17px}.brand small{font-size:10px;letter-spacing:2px}.saved-status{display:none}.overview{align-items:flex-start}.journey-stats strong{font-size:25px}.journey-stats{gap:13px;padding-top:15px}.journey-stats small{font-size:10px}h1{font-size:24px}.overview p{font-size:12px}.lab-grid{grid-template-columns:minmax(0,1fr)}.editor-panel{min-height:410px}.machine-panel{min-height:405px}.lesson-grid{grid-template-columns:1fr}.lesson-reward .heading-divider,#lesson-position{display:none}.mission-panel,.knowledge-panel{padding:16px 18px}.knowledge-panel p{font-size:14px}.mission-panel p{font-size:14px}.sidebar-bottom{padding:16px;font-size:10px}.sidebar-bottom small{font-size:10px}.lesson-link{padding-left:8px;gap:8px}.reg-description{display:inline}.register-row{padding-top:5px;padding-bottom:5px}.register-table-head,.register-row{grid-template-columns:1fr 1fr 1fr}.byte-detail{justify-content:flex-start;gap:25px}.page-footer>span:last-child{display:none}}
@media(max-width:700px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:248px;box-shadow:10px 0 40px #0006}.sidebar.open{transform:translateX(0)}.workspace{margin-left:0}.topbar{height:60px;padding:0 18px;position:relative;z-index:25;background:var(--bg)}.mobile-menu{display:grid;font-size:16px}.breadcrumb{gap:10px;font-size:12px}.manual-button{font-size:12px}.manual-button span{display:none}.manual-button svg{width:15px}main{padding:24px 17px 15px}.overview{gap:10px;padding-bottom:22px}h1{font-size:23px}.eyebrow{font-size:9px;letter-spacing:1px}.overview p{max-width:230px;line-height:1.8}.journey-stats{gap:0}.journey-stats>div:nth-of-type(2),.stat-divider{display:none}.journey-stats strong{font-size:25px}.journey-stats strong span{font-size:11px}.lesson-heading{margin-top:22px;gap:6px}.level-number{width:47px;height:54px;font-size:28px}.lesson-title-group{gap:10px}.lesson-eyebrow{font-size:9px;letter-spacing:0}.difficulty{display:none}h2{font-size:20px}.lesson-reward{gap:5px;font-size:10px}#reward{display:none}.lesson-reward .icon-button{width:26px;height:26px}.lesson-grid{gap:12px;margin-bottom:14px}.panel{border-radius:7px}.lab-grid{gap:14px}.editor-language{font-size:9px}.file-tab{padding:0 13px;font-size:11px}.run-toolbar{padding:12px}.primary-button,.secondary-button{font-size:12px;padding:9px 10px}.hint-button{font-size:11px}.code-editor{min-height:250px}#code,#code-highlight{font-size:13px}.mission-panel p,.knowledge-panel p{font-size:14px}.console-panel{margin-top:14px}.page-footer{font-size:10px}.success-banner{align-items:flex-start}.success-banner .primary-button{font-size:11px}.success-banner span{font-size:11px}.log-entry{gap:8px}.dialog-heading{padding:17px}#dialog-content{padding:17px}.memory-row span{word-spacing:6px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}