*,*:before,*:after{box-sizing:border-box}body{margin:0;padding:0;min-width:320px;min-height:100vh;overflow:hidden;background:#eef4f8}.app-container{--surface:#fff;--surface-soft:#f6fafb;--line:#d8e5e8;--text:#17262b;--muted:#64757c;--primary:#0f9f8f;--primary-dark:#08766c;--accent:#ffb84d;--terminal:#122027;--terminal-line:#20343d;--code-bg:#fbfdff;display:flex;flex-direction:column;height:100vh;min-width:0;font-family:Inter,Microsoft YaHei,PingFang SC,Segoe UI,Arial,sans-serif;background:radial-gradient(circle at 14% 12%,rgba(255,184,77,.16),transparent 24%),linear-gradient(135deg,#edf7f6 0%,#f7fbfd 45%,#eef4f8 100%);color:var(--text)}.app-header{min-height:72px;padding:12px 22px;display:grid;grid-template-columns:minmax(240px,1fr) auto auto;align-items:center;gap:16px;background:rgba(255,255,255,.88);border-bottom:1px solid rgba(184,205,211,.72);box-shadow:0 14px 32px #21404814;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);z-index:20}.header-left,.file-controls,.header-controls,.font-size-controls,.canvas-controls{display:flex;align-items:center}.icon-sprite{position:absolute;width:0;height:0;overflow:hidden}.svg-icon{width:18px;height:18px;flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.header-left{gap:12px;min-width:0}.brand-mark{width:46px;height:46px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(135deg,#0f9f8f,#2d7dd2);color:#fff;font-weight:900;letter-spacing:0;box-shadow:0 10px 24px #0f9f8f47}.brand-copy{min-width:0}.logo{font-size:1.18rem;line-height:1.2;font-weight:850;letter-spacing:0;color:var(--text)}.file-controls,.header-controls{gap:8px}.icon-btn,.run-btn,.tab-create-btn,.tab-close-btn{font-family:inherit;border:0;cursor:pointer;transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease}.icon-btn{width:34px;height:34px;padding:0;display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);font-size:1rem;font-weight:800;line-height:1}.icon-btn .icon{font-size:.72rem;letter-spacing:0}.icon-btn .svg-icon{width:17px;height:17px}.icon-btn:hover{background:#e8f2f3;color:var(--text)}.theme-toggle{border-color:transparent;background:transparent;color:#4d6970}.theme-emoji{font-size:1.12rem;line-height:1;filter:saturate(.95)}.theme-toggle:hover{border-color:transparent;background:#eef6f7;color:var(--primary-dark);box-shadow:none}.icon-btn:active,.tab-create-btn:active,.run-btn:active:not(:disabled){transform:translateY(1px)}.header-icon-btn{width:auto;height:38px;gap:7px;padding:0 13px;border-color:#d5e4e7;background:#fff;color:#365057;box-shadow:0 6px 18px #2b485214}.header-icon-btn:hover{border-color:#a8ced0;background:#f3fbfa;color:#0c746b}.btn-text,.run-symbol{font-weight:800}.run-btn .svg-icon{width:19px;height:19px;stroke-width:2.4}.run-btn{min-width:132px;height:44px;display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:0 20px;border-radius:10px;background:linear-gradient(135deg,#13ad91,#0f8f83);color:#fff;font-size:1rem;font-weight:850;box-shadow:0 12px 26px #0f8f8347}.run-btn:hover:not(:disabled){background:linear-gradient(135deg,#16bfa0,#0c7d73);box-shadow:0 14px 30px #0f8f8357}.stop-btn{background:linear-gradient(135deg,#f06464,#d94747);box-shadow:0 12px 26px #d947473d}.stop-btn:hover:not(:disabled){background:linear-gradient(135deg,#f47777,#c83838)}.stop-btn .svg-icon{width:21px;height:21px}.run-btn:disabled{cursor:not-allowed;opacity:.62;box-shadow:none}.small-btn{min-width:88px;height:32px;padding:0 12px;border-radius:8px;font-size:.86rem}.main-content{flex:1;min-height:0;display:flex;position:relative;gap:12px;padding:12px;overflow:hidden}.editor-pane,.preview-pane{min-width:0;overflow:hidden;border:1px solid rgba(184,205,211,.75);border-radius:8px;background:var(--surface);box-shadow:0 18px 42px #1c363d1a}.editor-pane{display:flex;flex-direction:column;transition:width .1s ease}.preview-pane{display:flex;flex-direction:column;transition:width .1s ease;background:#f7fbfc}.pane-header{min-height:48px;padding:7px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--surface-soft);border-bottom:1px solid var(--line);-webkit-user-select:none;user-select:none}.pane-title{min-width:0;display:flex;align-items:center}.pane-title strong{color:var(--text);font-size:1rem;line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pane-kicker{color:var(--primary-dark);font-size:.72rem;font-weight:850;letter-spacing:0}.font-size-controls,.canvas-controls{gap:7px;flex:0 0 auto}.divider{width:1px;height:22px;margin:0 2px;background:var(--line)}.tab-create-btn{height:34px;display:inline-flex;align-items:center;gap:7px;padding:0 12px;border:1px solid #cfe2e5;border-radius:8px;background:#fff;color:#24494f;font-size:.9rem;font-weight:850}.tab-create-btn .svg-icon{width:16px;height:16px;stroke-width:2.4}.tab-create-btn:hover{border-color:#9fcfd0;background:#effaf8;color:var(--primary-dark)}.tab-create-icon{font-size:1.05rem;line-height:1}.editor-tabs{min-height:48px;padding:7px 10px 0;display:flex;align-items:flex-end;gap:12px;background:#eaf3f5;border-bottom:1px solid var(--line)}.tabs-scroll{flex:1;min-width:0;display:flex;align-items:flex-end;gap:7px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none}.tabs-scroll::-webkit-scrollbar{display:none}.editor-tab-actions{align-self:center;padding-bottom:7px}.editor-tab{height:34px;max-width:220px;min-width:96px;margin-bottom:-1px;padding:0 9px 0 10px;display:inline-flex;align-items:center;gap:8px;border:1px solid #cddfe3;border-bottom-color:var(--line);border-radius:8px 8px 0 0;background:#dfecef;color:#4f6570;cursor:pointer}.editor-tab:hover{background:#edf6f7;color:var(--text)}.editor-tab.active{height:38px;background:var(--code-bg);border-color:#aecfd3;border-bottom-color:var(--code-bg);color:var(--text);box-shadow:0 -7px 18px #325c6814}.file-dot{width:7px;height:7px;flex:0 0 auto;border-radius:999px;background:#a8b6bc}.editor-tab.active .file-dot{background:var(--primary)}.tab-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.88rem;font-weight:750}.tab-rename-input{width:128px;min-width:0;padding:5px 7px;border:1px solid #98c7cc;border-radius:7px;outline:none;background:#fff;color:var(--text);font-size:.86rem;font-weight:700}.tab-close-btn{width:22px;height:22px;flex:0 0 auto;display:inline-grid;place-items:center;border-radius:7px;background:transparent;color:inherit;font-size:1.12rem;line-height:1}.tab-close-btn:hover{background:rgba(226,85,85,.12);color:#bc3333}.editor-wrapper{flex:1;min-height:0;position:relative;overflow:hidden;background:var(--code-bg)}.editor-wrapper>div,.cm-editor{width:100%!important;height:100%!important}.cm-scroller{overflow:auto}.resizer{position:absolute;top:12px;bottom:12px;width:12px;margin-left:-6px;cursor:col-resize;z-index:10}.resizer:after{content:"";position:absolute;top:50%;left:50%;width:4px;height:54px;border-radius:999px;background:#b8ced3;transform:translate(-50%,-50%)}.resizer:hover:after{background:var(--primary)}body.resizing,body.resizing-v{-webkit-user-select:none;user-select:none}body.resizing{cursor:col-resize}body.resizing-v{cursor:row-resize}.console-container,.canvas-container{min-height:120px;display:flex;flex-direction:column}.console-container{background:var(--terminal);color:#d7e4e7}.console-header{background:#182932;border-bottom-color:var(--terminal-line)}.console-header .pane-title strong,.console-header .pane-kicker{color:#e8f7f4}.console-header .clear-btn{color:#9eb3ba;opacity:.95}.console-header .clear-btn .svg-icon{width:18px;height:18px;stroke-width:2.25}.console-header .clear-btn:hover{background:rgba(255,255,255,.08)!important;color:#e8f7f4!important}.console-wrapper{flex:1;min-height:0;padding:14px 16px;overflow-y:auto;outline:none;font-family:Cascadia Mono,Consolas,Monaco,Courier New,monospace;line-height:1.55;background:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),var(--terminal);background-size:100% 30px}.console-wrapper pre{color:#d7e4e7;font-family:inherit;font-size:inherit;line-height:inherit}.terminal-output{margin:0;display:inline;color:#d7e4e7;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word}.terminal-input-line{display:inline-flex;align-items:baseline;max-width:100%;color:#9df0dd;vertical-align:middle}.terminal-input-field{width:14ch;min-width:120px;flex:1 1 14ch;margin:0;padding:0;border:none;outline:none;background:transparent;color:#9df0dd;caret-color:#fff;font-family:inherit;font-size:inherit;font-weight:800}.error-text{color:#ff8585!important}.input-text{color:#9df0dd}.vertical-resizer{height:10px;flex:0 0 10px;position:relative;cursor:row-resize;background:#e8f2f4;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.vertical-resizer:after{content:"";position:absolute;top:50%;left:50%;width:44px;height:4px;border-radius:999px;background:#b8ced3;transform:translate(-50%,-50%)}.vertical-resizer:hover:after{background:var(--primary)}.canvas-container{position:relative;background:#fff;transition:all .25s ease}.canvas-container.fullscreen{position:fixed;top:0;right:0;bottom:0;left:0;width:100vw;height:100vh!important;z-index:2000;border-radius:0;background:#fff}.canvas-container.collapsed{height:52px!important;min-height:52px;flex:0 0 52px;overflow:hidden}.canvas-container.collapsed .canvas-wrapper{display:none}.canvas-wrapper{flex:1;min-height:0;position:relative;display:flex;justify-content:center;align-items:center;overflow:hidden;padding:6px;background:linear-gradient(90deg,rgba(15,159,143,.07) 1px,transparent 1px),linear-gradient(rgba(15,159,143,.07) 1px,transparent 1px),#fbfdfd;background-size:28px 28px}#turtle-canvas-container{display:none;position:relative;z-index:1;overflow:hidden;border:1px solid #cddfe3;border-radius:4px;background:#fff;box-shadow:0 8px 20px #1d3e451a}#turtle-canvas-container:not(:empty){display:block}#turtle-canvas-container canvas{display:block;border:0;border-radius:0;max-width:none;max-height:none;background:transparent!important}.custom-context-menu{position:fixed;z-index:9999;min-width:172px;margin:0;padding:6px;list-style:none;border:1px solid #d7e4e7;border-radius:8px;background:#fff;box-shadow:0 18px 40px #1b333a2e}.custom-context-menu li{min-height:34px;padding:0 10px;display:flex;align-items:center;gap:9px;border-radius:7px;color:#263f46;cursor:pointer;font-size:.9rem}.custom-context-menu li:hover{background:#eef8f7}.custom-context-menu .menu-icon{width:18px;height:18px;color:var(--primary-dark)}.custom-context-menu .menu-text{flex:1}.custom-context-menu .menu-shortcut{color:#8a9aa0;font-size:.78rem}.custom-context-menu .menu-divider{min-height:1px;height:1px;margin:5px 2px;padding:0;background:#e2ecef;cursor:default}.clear-btn:hover{background:#ffecec!important;color:#c93c3c!important}body.dark-mode .app-container{--surface:#16232b;--surface-soft:#1d2c35;--line:#304650;--text:#edf7f8;--muted:#9fb3ba;--primary:#49d2bf;--primary-dark:#72e0d0;--code-bg:#111a20;--terminal:#071115;--terminal-line:#1b313a;background:linear-gradient(135deg,#0d171c 0%,#12222a 54%,#17262c 100%);color:var(--text)}body.dark-mode .app-header,body.dark-mode .editor-pane,body.dark-mode .preview-pane{background:rgba(22,35,43,.94);border-color:#304650;box-shadow:0 18px 42px #00000038}body.dark-mode .logo,body.dark-mode .pane-title strong{color:var(--text)}body.dark-mode .icon-btn{color:var(--muted)}body.dark-mode .header-icon-btn,body.dark-mode .tab-create-btn{background:#1c2c35;border-color:#38525d;color:#dceff2}body.dark-mode .header-icon-btn:hover,body.dark-mode .tab-create-btn:hover,body.dark-mode .icon-btn:hover{background:#243944;color:#fff}body.dark-mode .theme-toggle{border-color:transparent;background:transparent;color:#ffcf70;box-shadow:none}body.dark-mode .theme-toggle:hover{border-color:transparent;background:#243944;color:#ffe0a0;box-shadow:none}body.dark-mode .editor-tabs,body.dark-mode .vertical-resizer{background:#1a2a33;border-color:var(--line)}body.dark-mode .editor-tab{background:#243640;border-color:#38525d;color:#b8cbd1}body.dark-mode .editor-tab.active{background:var(--code-bg);border-color:#4c6d78;border-bottom-color:var(--code-bg);color:#f5fbfc}body.dark-mode .tab-rename-input,body.dark-mode .custom-context-menu{background:#111a20;border-color:#38525d;color:#edf7f8}body.dark-mode .custom-context-menu li{color:#dceff2}body.dark-mode .custom-context-menu li:hover{background:#213640}body.dark-mode .custom-context-menu .menu-divider{background:#304650}body.dark-mode .canvas-container,body.dark-mode .canvas-wrapper{background-color:#111a20}body.dark-mode .canvas-wrapper{background:linear-gradient(90deg,rgba(73,210,191,.08) 1px,transparent 1px),linear-gradient(rgba(73,210,191,.08) 1px,transparent 1px),#111a20;background-size:28px 28px}body.dark-mode #turtle-canvas-container{border-color:#42636d;background:#fff}@media (max-width:900px){.app-header{grid-template-columns:1fr auto}.file-controls{grid-column:1 / -1;justify-content:flex-start}.main-content{flex-direction:column;overflow-y:auto}.editor-pane,.preview-pane{width:100%!important;min-height:420px}.preview-pane{min-height:520px}.resizer{display:none}}@media (max-width:620px){.app-header{min-height:auto;grid-template-columns:1fr;gap:10px;padding:10px}.header-controls,.file-controls{justify-content:stretch}.run-btn,.header-icon-btn{flex:1}.pane-header{align-items:flex-start;flex-direction:column}.editor-tabs{align-items:flex-start;flex-direction:column;padding:8px 10px 0}.editor-tab-actions{align-self:flex-start;padding-bottom:8px}.font-size-controls,.canvas-controls{max-width:100%;flex-wrap:wrap}}:root{font-family:Inter,Microsoft YaHei,PingFang SC,Segoe UI,Arial,sans-serif;color:#17262b;background:#eef4f8;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html,body,#app{width:100%;height:100%}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit}