:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f4f7fb;--panel:#fff;--ink:#1f2a37;--muted:#6b7280;--line:#e3e8ef;--green:#22a45d;--green-dark:#1b8a4d;--red:#e5484d;--blue:#3b82f6;--amber:#f59e0b;--soft:#eef2f7;--on-accent:#fff;--toast-ink:#fff;--highlight:#fff3c4;--error-line:#ffe4e4;--error-bg:#fff1f1;--error-border:#ffc9c9;--error-ink:#b42318;--error-detail:#7a271a;--input-bg:#f8fbff;--chip-active-bg:#eef5ff;--nav-active-bg:#e0edff;--nav-active-ink:#1d4ed8;--badge-bg:#eef2f7;--badge-ran-bg:#dcfce7;--badge-ran-ink:#166534;--badge-loaded-bg:#e0f2fe;--badge-loaded-ink:#075985;--card-hover-border:#bfd4ff;--code-bg:#f1f5f9;--current-ring:#bbf7d0;--ok-ink:#166534;--thumb-placeholder:#f1f5f9;--paper:#fff;--gutter:#f8fafc;--active-line:#1f2a370a;--selection:#d6e6ff;--radius:14px;--mono:"JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;color:var(--ink);background:var(--bg);font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#101820;--panel:#1b2433;--ink:#e7eef8;--muted:#9aabbf;--line:#314156;--green:#3ecf7a;--green-dark:#2eb56a;--red:#ff6b6b;--blue:#7cb3ff;--amber:#fbbf24;--soft:#2a3548;--on-accent:#fff;--toast-ink:#101820;--highlight:#4a3b16;--error-line:#4c2430;--error-bg:#3a2228;--error-border:#7f3340;--error-ink:#fecdd3;--error-detail:#fda4af;--input-bg:#152033;--chip-active-bg:#1e3a5f;--nav-active-bg:#1e3a5f;--nav-active-ink:#bfdbfe;--badge-bg:#2a3548;--badge-ran-bg:#14532d;--badge-ran-ink:#bbf7d0;--badge-loaded-bg:#0c4a6e;--badge-loaded-ink:#bae6fd;--card-hover-border:#5b7eac;--code-bg:#253044;--current-ring:#166534;--ok-ink:#bbf7d0;--thumb-placeholder:#253044;--paper:#fff;--gutter:#161e2b;--active-line:#ffffff0d;--selection:#7cb3ff59}#theme .when-dark,:root[data-theme=dark] #theme .when-light{display:none}:root[data-theme=dark] #theme .when-dark{display:inline}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--ink);margin:0}#app{flex-direction:column;height:100vh;display:flex}.topbar{background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:16px;padding:10px 16px;display:flex}.brand{align-items:center;gap:8px;font-size:22px;font-weight:800;display:flex}.logo{border-radius:8px;width:32px;height:32px;display:block}.brand .name span{color:var(--green-dark)}.actions{align-items:center;gap:8px;display:flex}.actions.secondary{margin-left:auto}.lesson{background:var(--chip-active-bg);border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:8px 16px;font-size:14px;display:flex}.lesson[hidden]{display:none}.lesson-label{white-space:nowrap;font-weight:800}.lesson-task{flex:1;min-width:12em}.lesson-state{color:var(--muted);white-space:nowrap}.lesson-state.done{color:var(--ok-ink);font-weight:800}.lesson.miss{background:var(--highlight)}.lesson-state.miss{color:var(--error-ink);font-weight:800}.console .lesson-miss{background:var(--highlight);white-space:normal;border-radius:10px;margin:8px 0;padding:10px 12px;font-family:PingFang SC,Microsoft YaHei,sans-serif;font-weight:700}.vars{border-bottom:1px solid var(--line);font-family:var(--mono);flex-wrap:wrap;gap:8px;padding:6px 12px;font-size:13px;display:flex}.vars[hidden]{display:none}.vars .var{background:var(--soft);border-radius:999px;padding:2px 10px}.vars .var b{color:var(--blue);font-weight:700}.lesson-note{background:var(--chip-active-bg);border-radius:10px;margin-top:8px;padding:10px 12px}.btn{font:inherit;cursor:pointer;background:var(--soft);color:var(--ink);border:0;border-radius:999px;padding:9px 18px;font-weight:700;transition:transform 50ms,background .15s}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.run{background:var(--green);color:var(--on-accent);padding:9px 22px;font-size:17px}.btn.run:hover:not(:disabled){background:var(--green-dark)}.btn.stop{background:var(--red);color:var(--on-accent)}.btn.ghost{border:1px solid var(--line);background:0 0}.btn.ghost:hover{background:var(--soft)}.btn.icon{padding:6px 10px;font-size:18px;line-height:1}.select{border:1px solid var(--line);font:inherit;background:var(--panel);color:var(--ink);border-radius:999px;padding:8px 12px}.workspace{flex:1;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;min-height:0;padding:12px;display:grid}.pane{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);min-height:0;overflow:hidden}.editor-pane{display:flex}.editor{flex:1;min-width:0;font-size:17px}.editor .cm-editor{height:100%}.editor .cm-scroller{font-family:var(--mono);line-height:1.6}.editor .cm-activeLine.pyplay-current,.editor .pyplay-current{background:var(--highlight)!important}.editor .pyplay-error-line{background:var(--error-line)!important}.side-pane{background:0 0;border:0;grid-template-rows:minmax(0,3fr) minmax(0,2fr);gap:12px;display:grid}.canvas-wrap{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);position:relative;overflow:hidden}:root[data-theme=dark] .canvas-wrap:after,:root[data-theme=dark] .preview-stage:after{content:"";pointer-events:none;z-index:1;background:#10182024;position:absolute;inset:0}#canvas{outline:none;width:100%;height:100%;display:block}#canvas:focus-visible{box-shadow:inset 0 0 0 3px var(--blue)}.canvas-title{color:var(--muted);pointer-events:none;z-index:2;font-size:12px;position:absolute;top:8px;left:12px}.console-wrap{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;display:flex;overflow:hidden}.console-head{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:6px 12px;font-size:14px;font-weight:700;display:flex}.status{color:var(--muted);margin-left:auto;font-size:13px;font-weight:500}.console{font-family:var(--mono);white-space:pre-wrap;word-break:break-word;flex:1;padding:10px 12px;font-size:15px;overflow:auto}.console .echo{color:var(--blue)}.console .info{color:var(--muted);font-family:inherit;font-size:13px}.console .error-card{background:var(--error-bg);border:1px solid var(--error-border);white-space:normal;border-radius:10px;margin:8px 0;padding:10px 12px;font-family:PingFang SC,Microsoft YaHei,sans-serif}.console .error-card .title{color:var(--error-ink);font-weight:800}.console .error-card .hint{margin-top:4px}.console .error-card pre{font-family:var(--mono);color:var(--error-detail);white-space:pre-wrap;margin:8px 0 0;font-size:13px}.input-row{border-top:1px solid var(--line);background:var(--input-bg);gap:8px;padding:8px 12px;display:flex}.input-row input{border:2px solid var(--blue);font:inherit;font-family:var(--mono);border-radius:10px;flex:1;padding:8px 10px}.dialog{border-radius:var(--radius);background:var(--panel);min-width:320px;color:var(--ink);border:0;padding:20px 22px;box-shadow:0 20px 50px #0003}.dialog h3{margin:0 0 6px}.dialog p{white-space:pre-wrap;margin:0 0 12px}.dialog input,.input-row input,.lib-search{background:var(--panel);color:var(--ink)}.dialog input{border:2px solid var(--blue);width:100%;font:inherit;border-radius:10px;padding:8px 10px}.dialog-actions{justify-content:flex-end;gap:8px;margin-top:14px;display:flex}.toast{background:var(--ink);color:var(--toast-ink);z-index:10;border-radius:999px;padding:10px 16px;font-size:14px;position:fixed;bottom:20px;left:50%;transform:translate(-50%)}@media (max-width:860px){.workspace{grid-template-rows:minmax(260px,1fr) minmax(420px,1.3fr);grid-template-columns:1fr}.actions.secondary{margin-left:0}}[hidden]{display:none!important}.project-box{align-items:center;gap:6px;min-width:0;display:flex}.project-btn{text-overflow:ellipsis;white-space:nowrap;max-width:260px;overflow:hidden}.save-state{color:var(--muted);white-space:nowrap;font-size:12px}.save-state[data-state=error],.save-state[data-state=memory]{color:var(--red);font-weight:700}.save-state[data-state=unsaved]{color:var(--amber)}.big-dialog{background:var(--bg);width:min(1180px,94vw);height:min(820px,90vh);color:var(--ink);border:0;border-radius:18px;flex-direction:column;padding:0;display:none;overflow:hidden;box-shadow:0 30px 80px #0f172a59}.big-dialog[open]{display:flex}.big-dialog::backdrop{background:#0f172a73}.big-head{background:var(--panel);border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:14px 18px;display:flex}.big-head h2{white-space:nowrap;margin:0;font-size:20px}.big-head .close{margin-left:auto;padding:6px 12px}.lib-search{border:2px solid var(--line);max-width:460px;font:inherit;border-radius:999px;flex:1;padding:8px 16px}.lib-search:focus{border-color:var(--blue);outline:none}.chip{border:1px solid var(--line);background:var(--panel);color:var(--ink);font:inherit;cursor:pointer;border-radius:999px;padding:4px 12px;font-size:13px}.chip:hover,.chip.active{border-color:var(--blue);color:var(--blue);background:var(--chip-active-bg)}.chip.static{cursor:default;padding:2px 8px;font-size:12px}.lib-chips{flex-wrap:wrap;gap:8px;display:flex}.badge{background:var(--badge-bg);color:var(--muted);border-radius:999px;padding:1px 8px;font-size:11px}.badge.ran{background:var(--badge-ran-bg);color:var(--badge-ran-ink)}.badge.loaded{background:var(--badge-loaded-bg);color:var(--badge-loaded-ink)}.badge.done{background:var(--badge-ran-bg);color:var(--badge-ran-ink)}.lib-empty{color:var(--muted);text-align:center;padding:30px}.lib-body{flex:1;grid-template-columns:190px 1fr;min-height:0;display:grid}.lib-sidebar{background:var(--panel);border-right:1px solid var(--line);flex-direction:column;gap:2px;padding:12px 10px;display:flex;overflow:auto}.lib-sidebar hr{border:0;border-top:1px solid var(--line);width:100%;margin:8px 0}.lib-cat{color:var(--ink);font:inherit;cursor:pointer;text-align:left;background:0 0;border:0;border-radius:10px;justify-content:space-between;align-items:center;padding:8px 12px;font-size:15px;display:flex}.lib-cat:hover{background:var(--soft)}.lib-cat.active{background:var(--nav-active-bg);color:var(--nav-active-ink);font-weight:700}.lib-cat .count{color:var(--muted);font-size:12px;font-weight:500}.lib-hint{color:var(--muted);margin:auto 8px 0;font-size:11px}.lib-main{flex-direction:column;gap:14px;padding:16px 18px;display:flex;overflow:auto}.lib-grid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px;display:grid}.lib-card{background:var(--panel);border:1px solid var(--line);cursor:pointer;font:inherit;text-align:left;border-radius:14px;flex-direction:column;align-items:flex-start;gap:4px;padding:14px;transition:transform 80ms,box-shadow .15s,border-color .15s;display:flex}.lib-card:hover{border-color:var(--card-hover-border);transform:translateY(-2px);box-shadow:0 8px 20px #0f172a14}.lib-card .emoji{font-size:30px;line-height:1.1}.lib-card .title{font-size:16px;font-weight:800}.lib-card .summary{color:var(--muted);font-size:13px;font-family:var(--mono)}.lib-card .meta{flex-wrap:wrap;align-items:center;gap:6px;margin-top:4px;display:flex}.stars{color:var(--amber);letter-spacing:1px;font-size:13px}.stars.big{margin:0;font-size:18px}.fav{color:var(--amber)}.detail{flex-direction:column;gap:12px;min-height:100%;display:flex}.detail-head{align-items:center;gap:12px;display:flex}.detail-head h3{margin:0;font-size:22px}.detail-head .fav-toggle{margin-left:auto}.detail-cols{flex:1;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:18px;min-height:0;display:grid}.detail-text,.detail-media{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px 18px;overflow:auto}.detail h4{color:var(--muted);margin:12px 0 6px;font-size:14px}.detail h4:first-child{margin-top:0}.detail p{margin:0 0 8px;line-height:1.7}.detail code{font-family:var(--mono);background:var(--code-bg);border-radius:6px;padding:1px 6px;font-size:.92em}.learn{margin:0;padding-left:20px;line-height:1.9}.detail-tags{gap:6px;margin-top:12px;display:flex}.media-head{justify-content:space-between;align-items:center;display:flex}.preview-stage{border-radius:10px;position:relative;overflow:hidden}.preview-canvas{border:1px solid var(--line);background:var(--paper);border-radius:10px;outline:none;width:100%;height:280px;display:block}.preview-canvas:focus-visible{box-shadow:0 0 0 3px var(--blue)}.preview-output{color:#e2e8f0;max-height:110px;font-family:var(--mono);white-space:pre-wrap;background:#0f172a;border-radius:10px;margin:8px 0 0;padding:8px 10px;font-size:13px;overflow:auto}.preview-output:empty{display:none}.preview-note{color:var(--muted);font-size:13px;margin:6px 0 0!important}.preview-code{border:1px solid var(--line);border-radius:10px;max-height:300px;font-size:14px;overflow:hidden auto}.preview-code .cm-editor{background:var(--panel)}.detail-actions{justify-content:flex-end;display:flex}.load-example{padding:12px 28px;font-size:18px}.proj-body{flex-direction:column;flex:1;gap:14px;padding:16px 18px;display:flex;overflow:auto}.proj-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;display:grid}.proj-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;flex-direction:column;display:flex;overflow:hidden}.proj-card.current{border-color:var(--green);box-shadow:0 0 0 2px var(--current-ring)}.proj-open{color:var(--ink);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;flex-direction:column;gap:4px;padding:0 0 10px;display:flex}.proj-open:hover .thumb{filter:brightness(.97)}.proj-open .title,.proj-open .summary,.proj-open .tags{padding:0 12px}.proj-open .title{align-items:center;gap:6px;font-weight:800;display:flex}.proj-open .summary{color:var(--muted);font-size:12px}.proj-open .tags{flex-wrap:wrap;gap:4px;display:flex}.thumb{aspect-ratio:4/3;object-fit:cover;background:var(--paper);border-bottom:1px solid var(--line);width:100%;display:block}.thumb.placeholder{background:var(--thumb-placeholder);justify-content:center;align-items:center;font-size:42px;display:flex}.proj-actions{flex-wrap:wrap;gap:4px;padding:0 8px 10px;display:flex}.proj-actions .btn{padding:3px 8px}.proj-footer{background:var(--panel);border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:12px;padding:10px 18px;font-size:13px;display:flex}.persist.ok{color:var(--ok-ink)}@media (max-width:860px){.lib-body{grid-template-columns:1fr}.lib-sidebar{border-right:0;border-bottom:1px solid var(--line);flex-flow:wrap}.lib-sidebar hr,.lib-hint{display:none}.detail-cols{grid-template-columns:1fr}}