:root{--color-bg: #0a0a0a;--color-surface: #161616;--color-surface-2: #1f1f1f;--color-primary: #ffcc00;--color-primary-hover: #ffd633;--color-text: #f5f5f5;--color-text-dim: #9a9a9a;--color-success: #34d399;--color-error: #f87171;--color-info: #60a5fa;--color-border: #2a2a2a;--color-canvas-bg: #ffffff;--radius-md: 10px;--radius-lg: 18px;--font-display: "Poppins", sans-serif;--font-body: "Inter", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", ui-monospace, "Courier New", monospace;--shell-navbar-height: 64px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:14px;line-height:1.5}#app{display:flex;flex-direction:column;height:100vh;overflow:hidden}#page-container{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-hover)}button,.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;cursor:pointer;border:none;border-radius:var(--radius-md);font-family:var(--font-body);font-size:13px;font-weight:500;padding:8px 16px;transition:background .2s,opacity .2s;box-sizing:border-box}button:focus-visible,a:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--color-primary);outline-offset:0}.btn-primary{background:var(--color-primary);color:#000}.btn-primary:hover{background:var(--color-primary-hover)}.btn-ghost{background:transparent;color:var(--color-text);border:1px solid var(--color-border)}.btn-ghost:hover{background:var(--color-surface-2)}.btn-icon{background:transparent;color:var(--color-text-dim);padding:6px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center}.btn-icon:hover{background:var(--color-surface-2);color:var(--color-text)}input,textarea,select{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);padding:8px 12px;font-family:var(--font-body);font-size:13px;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--color-primary)}.navbar{height:var(--shell-navbar-height);background:var(--color-surface);border-bottom:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between;padding:0 20px;flex-shrink:0}.navbar-brand{font-family:var(--font-display);font-size:22px;font-weight:700;color:var(--color-primary);letter-spacing:-.5px}.navbar-nav{display:flex;align-items:center;gap:4px}.navbar-nav a{color:var(--color-text-dim);padding:8px 14px;border-radius:var(--radius-md);font-size:14px;font-weight:500;transition:color .2s,background .2s}.navbar-nav a:hover,.navbar-nav a.active{color:var(--color-text);background:var(--color-surface-2)}.navbar-right{display:flex;align-items:center;gap:10px}.navbar-user{display:flex;align-items:center;gap:8px;color:var(--color-text-dim);font-size:13px}.navbar-avatar{width:32px;height:32px;border-radius:50%;background:var(--color-primary);color:#000;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}.workspace{display:flex;flex:1;overflow:hidden}.workspace-left{flex:3;display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--color-border)}.workspace-right{flex:2;display:flex;flex-direction:column;min-width:0}.blockly-area{flex:1;position:relative;overflow:hidden}.controls-bar{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--color-surface);border-bottom:1px solid var(--color-border);flex-shrink:0;flex-wrap:wrap}.controls-bar .spacer{flex:1}.controls-bar label{font-size:12px;color:var(--color-text-dim);display:flex;align-items:center;gap:6px}.controls-bar input[type=range]{width:80px;background:transparent;border:none;padding:0}.output-panel{flex:1;min-height:0;display:flex;flex-direction:column}.output-header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--color-surface);border-bottom:1px solid var(--color-border);font-size:12px;font-weight:600;color:var(--color-text-dim);text-transform:uppercase;letter-spacing:.5px}#draw-output,#print-output{flex:1;display:flex;flex-direction:column;min-height:0}.canvas-container{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;background:var(--color-bg);padding:16px;position:relative}.canvas-container canvas{background:var(--color-canvas-bg);border-radius:var(--radius-md);max-width:100%;max-height:100%;box-shadow:0 4px 28px #0000008c,0 0 0 1px #ffffff0f}.console-container{flex:1;background:#0d0d0d;padding:16px;overflow-y:auto;font-family:var(--font-mono);font-size:13px;line-height:1.7;white-space:pre-wrap;word-break:break-all}.console-line{opacity:0;animation:typewriter .3s ease forwards}.console-line.printed{opacity:1}@keyframes typewriter{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.console-cursor{display:inline-block;width:8px;height:16px;background:var(--color-primary);animation:blink .8s step-end infinite;vertical-align:text-bottom;margin-left:2px}@keyframes blink{50%{opacity:0}}.lesson-panel{background:var(--color-surface);border-top:1px solid var(--color-border);flex-shrink:0;display:flex;flex-direction:column;overflow:hidden;max-height:240px;transition:max-height .25s ease}.lesson-panel.collapsed{max-height:36px}.lesson-panel-header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;font-size:12px;font-weight:600;color:var(--color-text-dim);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--color-border);cursor:pointer;flex-shrink:0;-webkit-user-select:none;user-select:none}.lesson-panel-header .collapse-arrow{font-size:10px;transition:transform .2s}.lesson-panel.collapsed .collapse-arrow{transform:rotate(-90deg)}.lesson-panel-body{overflow-y:auto;flex:1}.lesson-item{padding:10px 16px;border-bottom:1px solid var(--color-border);cursor:pointer;transition:background .15s}.lesson-item:hover{background:var(--color-surface-2)}.lesson-item.active{border-left:3px solid var(--color-primary);background:var(--color-surface-2)}.lesson-item-title{font-weight:600;font-size:13px;margin-bottom:2px}.lesson-item-desc{font-size:12px;color:var(--color-text-dim);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lesson-item-badge{display:inline-block;font-size:10px;padding:2px 8px;border-radius:20px;background:var(--color-success);color:#000;margin-top:4px;font-weight:600}.code-viewer{background:var(--color-surface-2);border-top:1px solid var(--color-border);padding:12px 16px;max-height:200px;overflow-y:auto;font-family:var(--font-mono);font-size:13px;line-height:1.5;white-space:pre-wrap;color:var(--color-text-dim);flex-shrink:0}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100}.modal-content{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px;min-width:min(360px,95vw);max-width:min(500px,95vw);width:100%}.modal-content h2{font-family:var(--font-display);margin-bottom:16px}.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.page-home{display:flex;align-items:center;justify-content:center;flex:1;text-align:center;padding:40px}.page-home h1{font-family:var(--font-display);font-size:clamp(28px,5vw,48px);color:var(--color-primary);margin-bottom:12px}.page-home p{color:var(--color-text-dim);font-size:18px;margin-bottom:32px;max-width:500px}.page-home .module-cards{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.module-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;width:240px;text-align:center;transition:border-color .2s,transform .2s;cursor:pointer}.module-card:hover{border-color:var(--color-primary);transform:translateY(-4px)}.module-card h2{font-family:var(--font-display);margin-bottom:8px}.module-card p{font-size:13px;color:var(--color-text-dim)}.project-list{padding:8px}.project-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-radius:var(--radius-md);cursor:pointer;transition:background .15s}.project-item:hover{background:var(--color-surface-2)}.project-list-item{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--color-border)}.project-list-item:last-child{border-bottom:none}.project-list-item-title{font-weight:600;font-size:14px;margin-bottom:2px}.project-list-item-date{font-size:12px;color:var(--color-text-dim)}.project-list-load{flex-shrink:0}.page-login{display:flex;align-items:center;justify-content:center;flex:1}.login-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;width:min(380px,100% - 32px)}.login-card h1{font-family:var(--font-display);margin-bottom:20px;text-align:center}.form-group{margin-bottom:14px}.form-group label{display:block;font-size:12px;font-weight:600;color:var(--color-text-dim);margin-bottom:4px;text-transform:uppercase;letter-spacing:.5px}.form-group input{width:100%}.form-error{color:var(--color-error);font-size:12px;margin-top:4px}.form-toggle{text-align:center;margin-top:12px;font-size:13px;color:var(--color-text-dim)}.form-toggle a{cursor:pointer}@media (max-width: 1024px){.workspace-left{flex:2}.workspace-right{flex:1}}@media (max-width: 768px){.workspace{flex-direction:column}.workspace-left{flex:none;border-right:none;border-bottom:1px solid var(--color-border);max-height:50vh}.workspace-right{flex:1;min-height:0}.lesson-panel{max-height:140px}.lesson-item{padding:6px 12px}.lesson-item-title{font-size:12px}.lesson-item-desc{font-size:11px}}@media (max-width: 480px){.controls-bar{gap:4px;padding:8px 10px}.controls-bar label>:not(input){display:none}.controls-bar .btn-ghost{padding:6px 8px;font-size:12px}}.blocklyToolboxDiv{background:var(--color-surface-2)!important}.blocklyTreeRow{height:36px;line-height:36px}.blocklyTreeRowContentContainer{font-family:var(--font-body);font-size:13px}.blocklyTreeIcon{display:none}.blocklyTreeRow.blocklyTreeSelected .blocklyTreeLabel{color:#000!important}.blocklyFlyoutBackground{fill:var(--color-surface)!important}.blocklyMainBackground{fill:var(--color-bg)!important}.blocklySvg{background:var(--color-bg)!important}.toast{position:fixed;bottom:32px;left:50%;transform:translate(-50%);background:var(--color-surface-2);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:12px 24px;font-size:14px;z-index:200;box-shadow:0 8px 32px #0006;opacity:0;transition:opacity .25s ease;pointer-events:none}.toast.show{opacity:1}.share-page{display:flex;flex-direction:column;flex:1;overflow:hidden;height:100%}.share-loading,.share-error{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;text-align:center;padding:40px}.share-spinner{width:40px;height:40px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:share-spin 1s linear infinite;margin-bottom:16px}@keyframes share-spin{to{transform:rotate(360deg)}}.share-error-icon{font-size:48px;margin-bottom:16px}.share-error h2{font-family:var(--font-display);font-size:24px;margin-bottom:8px;color:var(--color-text)}.share-error p{color:var(--color-text-dim);font-size:14px}.share-content{display:flex;flex-direction:column;flex:1;overflow:hidden}.share-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--color-surface);border-bottom:1px solid var(--color-border);flex-shrink:0}.share-meta{display:flex;align-items:center;gap:12px}.share-badge{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;background:var(--color-surface-2);border:1px solid var(--color-border);padding:4px 8px;border-radius:4px;color:var(--color-text-dim)}.share-title{font-family:var(--font-display);font-size:18px;font-weight:600;color:var(--color-text)}.share-actions{display:flex;gap:8px}.share-workspace{display:flex;flex:1;overflow:hidden}.share-blocks-panel{flex:3;display:flex;flex-direction:column;min-width:0;border-right:1px solid var(--color-border)}.share-panel-label{padding:8px 16px;background:var(--color-surface);border-bottom:1px solid var(--color-border);font-size:12px;font-weight:600;color:var(--color-text-dim);text-transform:uppercase;letter-spacing:.5px;flex-shrink:0}.share-output-panel{flex:2;display:flex;flex-direction:column;min-width:0}#share-output{flex:1;display:flex;flex-direction:column;min-height:0}@media (max-width: 768px){.workspace,.share-workspace{flex-direction:column;overflow-y:auto}.workspace-left,.share-blocks-panel{flex:none;border-right:none;border-bottom:1px solid var(--color-border);height:50vh;min-height:350px}.workspace-right,.share-output-panel{flex:none;border-left:none;height:50vh;min-height:350px}.navbar{padding:0 10px;gap:8px}.navbar-brand{font-size:18px}.navbar-nav{gap:2px}.navbar-nav a{padding:6px 8px;font-size:12px}.navbar-user span{display:none}}