:root{--bg:#f5f6f8;--surface:#fff;--surface-2:#f0f2f5;--border:#dde1e7;--text:#1f2937;--muted:#6b7280;--accent:#2563eb;--accent-soft:#dbeafe;--run:#16a34a;--run-hover:#15803d;--ok:#16a34a;--ok-soft:#dcfce7;--bad:#dc2626;--bad-soft:#fee2e2;--warn:#b45309;--code-bg:#f3f4f6;--topbar:#1e293b;--topbar-text:#e2e8f0;--console-bg:#fbfbfc;--shadow:0 10px 30px #0f172a2e;--font-ui:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:var(--font-ui);color:var(--text);background:var(--bg)}:root[data-theme=dark]{--bg:#0f141a;--surface:#171d25;--surface-2:#1f2630;--border:#2b3440;--text:#e5e7eb;--muted:#9aa4b2;--accent:#60a5fa;--accent-soft:#1e3a5f;--ok:#4ade80;--ok-soft:#14352a;--bad:#f87171;--bad-soft:#3b1d1d;--warn:#fbbf24;--code-bg:#232b36;--topbar:#0b1016;--console-bg:#12171e;--shadow:0 10px 30px #00000080;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{overflow:hidden}button{font:inherit;color:inherit}code,pre,kbd{font-family:var(--font-mono)}.app{flex-direction:column;height:100%;display:flex}.topbar{background:var(--topbar);height:52px;color:var(--topbar-text);flex-shrink:0;align-items:center;gap:24px;padding:0 16px;display:flex}.brand{align-items:center;gap:8px;font-weight:700;display:flex}.brand-logo{color:#1e293b;width:30px;height:30px;font-family:var(--font-mono);background:#facc15;border-radius:8px;place-items:center;font-size:13px;display:grid}.brand-name{letter-spacing:.2px;font-size:17px}.track-tabs{background:#ffffff12;border-radius:10px;gap:4px;padding:4px;display:flex}.track-tab{color:var(--topbar-text);cursor:pointer;background:0 0;border:0;border-radius:7px;padding:6px 14px;font-size:14px;font-weight:500}.track-tab:hover{background:#ffffff14}.track-tab{align-items:center;gap:7px;display:flex}.track-icon{flex-shrink:0;width:16px;height:16px}.track-icon-text{font-family:var(--font-ui);font-size:11px;font-weight:800}.track-icon-javascript .track-icon-bg{fill:#f7df1e}.track-icon-javascript .track-icon-text{fill:#1e293b}.track-icon-typescript .track-icon-bg{fill:#3178c6}.track-icon-typescript .track-icon-text{fill:#fff}.track-icon-react{color:#61dafb}.track-tab.active .track-icon-javascript .track-icon-bg{fill:#1e293b}.track-tab.active .track-icon-javascript .track-icon-text{fill:#facc15}.track-tab.active .track-icon-typescript .track-icon-bg{fill:#fff}.track-tab.active .track-icon-typescript .track-icon-text{fill:#3178c6}.track-tab.active .track-icon-react{color:#0f172a}.floatingchat-container-wrap,.floatingchat-container-wrap-mobi,.floating-chat-kofi-popup-iframe,.floating-chat-kofi-popup-iframe-mobi{left:auto!important;right:16px!important}:-webkit-any(:root:fullscreen .floatingchat-container-wrap,:root:fullscreen .floatingchat-container-wrap-mobi,:root:fullscreen .floating-chat-kofi-popup-iframe,:root:fullscreen .floating-chat-kofi-popup-iframe-mobi),.main.is-hidden{display:none!important}:is(:root:fullscreen .floatingchat-container-wrap,:root:fullscreen .floatingchat-container-wrap-mobi,:root:fullscreen .floating-chat-kofi-popup-iframe,:root:fullscreen .floating-chat-kofi-popup-iframe-mobi),.main.is-hidden{display:none!important}.contact-page{flex:1;padding:28px 20px 60px;overflow-y:auto}.contact-inner{max-width:640px;margin:0 auto}.contact-inner h1{margin:18px 0 6px;font-size:30px}.contact-lead{color:var(--muted);margin:0 0 22px;line-height:1.6}.contact-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.contact-card h2{margin:0 0 8px;font-size:18px}.contact-card p{line-height:1.6}.contact-form{flex-direction:column;gap:14px;display:flex}.contact-row{grid-template-columns:1fr 1fr;gap:14px;display:grid}.contact-form label{flex-direction:column;gap:6px;font-size:13px;font-weight:600;display:flex}.contact-form input,.contact-form select,.contact-form textarea{border:1px solid var(--border);background:var(--bg);color:var(--text);font:inherit;border-radius:8px;padding:9px 12px;font-size:14px;font-weight:400}.contact-form textarea{resize:vertical}.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.contact-honeypot{display:none}.contact-error{background:var(--bad-soft);color:var(--bad);border-radius:8px;margin:0;padding:10px 12px;font-size:14px}.contact-submit{align-self:flex-start;padding:9px 20px}.contact-success{text-align:center;padding:36px 20px}.contact-success h2{color:var(--ok)}.contact-report{background:var(--bad-soft);color:var(--bad);border-radius:8px;margin:0;padding:10px 12px;font-size:14px}.contact-social{color:var(--text);align-items:center;gap:14px;margin-top:16px;text-decoration:none;transition:border-color .15s;display:flex}.contact-social:hover{border-color:#e1306c}.contact-social-icon{color:#fff;background:linear-gradient(45deg,#f09433,#dc2743 50%,#bc1888);border-radius:10px;flex-shrink:0;width:40px;height:40px;padding:8px}.contact-social-body{flex-direction:column;gap:2px;min-width:0;display:flex}.contact-social-body span{color:var(--muted);font-size:14px}.contact-social-arrow{color:var(--muted);margin-left:auto}.contact-social+.contact-social{margin-top:12px}.contact-social-youtube:hover{border-color:red}.contact-social-youtube .contact-social-icon{background:red}.contact-social-tiktok:hover{border-color:#25f4ee}.contact-social-tiktok .contact-social-icon{background:#000}@media (width<=760px){.contact-row{grid-template-columns:1fr}}@media (width<=1620px){.icon-btn-label,.topbar-progress-bar{display:none}}@media (width<=1300px){.brand-name{display:none}}.track-tab.active.track-javascript{color:#1e293b;background:#facc15}.track-tab.active.track-typescript{color:#fff;background:#3178c6}.track-tab.active.track-react{color:#0f172a;background:#61dafb}.track-tab.active.track-nextjs{color:#0f172a;background:#f8fafc}.track-tab.active.track-nodejs{color:#fff;background:#5fa04e}.track-tab.active .track-icon-nodejs path{fill:#fff}.track-tab.active .track-icon-nodejs .track-icon-text{fill:#5fa04e}.track-tab.active.track-python{color:#fff;background:#3776ab}.track-icon-python-blue{fill:#3776ab}.track-icon-python-yellow{fill:#ffd43b}.track-tab.active .track-icon-python-blue{fill:#fff}.track-tab.active.track-postgresql{color:#fff;background:#336791}.track-icon-db-body{fill:#336791}.track-icon-db-top{fill:#4a86b8}.track-icon-db-line{fill:none;stroke:#fff;stroke-width:1.2px;stroke-opacity:.7}.track-tab.active .track-icon-db-body{fill:#fff}.track-tab.active .track-icon-db-top{fill:#cfe0ef}.track-tab.active .track-icon-db-line{stroke:#336791}.track-tab.active.track-karel{color:#431407;background:#fdba74}.menu-buttons{align-items:center;gap:6px;margin-left:auto;display:flex}.topbar .btn-ghost,.topbar .icon-btn{color:var(--topbar-text);white-space:nowrap}.btn{cursor:pointer;background:var(--surface-2);border:1px solid #0000;border-radius:8px;padding:7px 14px;font-size:14px;font-weight:500;transition:background .15s,border-color .15s}.btn:disabled{opacity:.5;cursor:default}.btn-small{padding:4px 10px;font-size:13px}.btn-primary{background:var(--accent);color:#fff}.btn-ghost{background:0 0}.btn-ghost:hover{background:#ffffff1a}.btn-outline{border-color:var(--border);background:0 0}.btn-outline:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.btn-run{background:var(--run);color:#fff;padding:6px 16px;font-weight:600}.btn-run:hover:not(:disabled){background:var(--run-hover)}.icon-btn{cursor:pointer;color:var(--muted);background:0 0;border:0;border-radius:6px;padding:4px 8px;font-size:14px}.icon-btn:hover{background:var(--surface-2);color:var(--text)}.topbar .icon-btn:hover{color:#fff;background:#ffffff1a}.main{flex:1;min-height:0}.label-short{display:none}.mobile-main{flex-direction:column;flex:1;min-height:0;display:flex}.mobile-main.is-hidden,.mobile-pane[hidden]{display:none}.mobile-tabs{border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0;gap:4px;padding:6px 8px;display:flex}.mobile-tab{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:7px;flex:1;padding:7px 0;font-size:14px;font-weight:600}.mobile-tab.active{background:var(--accent-soft);color:var(--accent)}.mobile-pane{flex-direction:column;flex:1;min-height:0;display:flex}.mobile-pane>*{flex:1;height:auto;min-height:0}.mobile-stack>:first-child{border-bottom:1px solid var(--border);flex:1.4}.resizer{background:var(--border);transition:background .15s}.resizer-v{width:4px}.resizer-h{height:4px}.resizer:hover,.resizer[data-separator=active]{background:var(--accent)}.pane-header{border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0;align-items:center;gap:10px;height:42px;padding:0 12px;display:flex}.file-name{font-family:var(--font-mono);color:var(--muted);font-size:13px}.pane-actions{align-items:center;gap:6px;margin-left:auto;display:flex}.question-pane{background:var(--surface);flex-direction:column;height:100%;display:flex;position:relative}.next-up{z-index:5;background:var(--surface);pointer-events:none;place-items:center;padding:20px;animation:1.7s forwards next-up-overlay;display:grid;position:absolute;inset:0}.next-up-card{text-align:center;flex-direction:column;align-items:center;gap:8px;animation:1.7s cubic-bezier(.2,.9,.3,1.2) forwards next-up-card;display:flex}.next-up-label{letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);font-size:12px;font-weight:700}.next-up-title{font-size:22px;line-height:1.3}.next-up-ready{color:var(--muted);font-size:14px}.question-pane.is-entering .question-scroll{animation:.45s ease-out 1.1s backwards question-enter}@keyframes next-up-overlay{0%,70%{opacity:1}to{opacity:0}}@keyframes next-up-card{0%{opacity:0;transform:translateY(12px)scale(.92)}20%,70%{opacity:1;transform:none}to{opacity:0;transform:translateY(-8px)scale(1.03)}}@keyframes question-enter{0%{opacity:0;transform:translate(24px)}}.confetti{z-index:200;pointer-events:none;position:fixed;inset:0;overflow:hidden}.confetti span{opacity:0;border-radius:2px;width:8px;height:14px;animation:2.6s ease-in forwards confetti-fall;position:absolute;top:-16px}.milestone{z-index:201;border:1px solid var(--border);border-left:4px solid var(--ok);background:var(--surface);width:max-content;max-width:calc(100vw - 24px);box-shadow:var(--shadow);border-radius:12px;align-items:center;gap:12px;padding:14px 16px;animation:.5s cubic-bezier(.2,.9,.3,1.3) both milestone-in;display:flex;position:fixed;top:64px;left:50%;transform:translate(-50%)}.milestone-emoji{font-size:32px}.milestone-body{flex-direction:column;gap:2px;display:flex}.milestone-body span{color:var(--muted);font-size:14px}@keyframes confetti-fall{0%{opacity:1;transform:translate(0)rotate(0)}85%{opacity:1}to{opacity:0;transform:translate(var(--drift), 100vh) rotate(var(--spin))}}@keyframes milestone-in{0%{opacity:0;transform:translate(-50%,-20px)scale(.9)}to{opacity:1;transform:translate(-50%)}}@media (prefers-reduced-motion:reduce){.confetti{display:none}.next-up,.next-up-card,.question-pane.is-entering .question-scroll{animation-duration:1ms;animation-delay:0s}}.question-scroll{flex:1;padding:22px 26px;overflow-y:auto}.question-meta{flex-wrap:wrap;gap:8px;margin-bottom:12px;display:flex}.chip{background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:500}.chip-solved{background:var(--ok-soft);color:var(--ok)}.difficulty{border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600}.difficulty.easy{background:var(--ok-soft);color:var(--ok)}.difficulty.medium{color:#b45309;background:#fef3c7}.difficulty.hard{background:var(--bad-soft);color:var(--bad)}:root[data-theme=dark] .difficulty.medium{color:#fbbf24;background:#3a2e10}.question-title{margin:0 0 14px;font-size:24px}.question-number{color:var(--muted);font-weight:500}.question-text{margin:0 0 12px;line-height:1.65}.question-text code,.checks code{background:var(--code-bg);border-radius:5px;padding:1px 6px;font-size:.9em}.section-title{text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin:22px 0 8px;font-size:13px}.example,.solution-code{background:var(--code-bg);border-radius:8px;margin:0;padding:12px 14px;font-size:13px;line-height:1.6;overflow-x:auto}.checks{margin:0;padding-left:20px;line-height:1.8}.solution-box{margin-top:26px}.hint-box{border-left:3px solid var(--warn);background:color-mix(in srgb, var(--warn) 12%, transparent);border-radius:8px;margin:0 0 12px;padding:10px 14px;line-height:1.6;animation:.3s ease-out hint-in}@keyframes hint-in{0%{opacity:0;transform:translateY(-6px)}}.related-link{width:fit-content;color:var(--muted);font:inherit;cursor:pointer;background:0 0;border:0;gap:4px;margin:0 0 12px;padding:0;font-size:14px;display:flex}.related-link span{color:var(--accent)}.related-link:hover span{text-decoration:underline}.report-btn{color:var(--muted);font:inherit;cursor:pointer;background:0 0;border:0;border-radius:6px;margin-left:auto;padding:2px 6px;font-size:12px}.report-btn:hover{color:var(--bad);background:var(--bad-soft)}.chip.chip-helped{background:color-mix(in srgb, var(--warn) 16%, transparent);color:var(--warn)}.solution{border:1px solid var(--border);border-radius:10px;margin-top:12px;overflow:hidden}.solution-header{background:var(--surface-2);align-items:center;gap:6px;padding:8px;display:flex}.solution-header .btn-small{margin-left:auto}.solution-tab{cursor:pointer;color:var(--muted);background:0 0;border:0;border-radius:6px;padding:4px 10px;font-size:13px}.solution-tab.active{background:var(--surface);color:var(--text);font-weight:600}.solution .solution-code{border-radius:0}.question-footer{border-top:1px solid var(--border);justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.question-count{color:var(--muted);font-size:14px}.editor-pane{background:var(--surface);flex-direction:column;height:100%;display:flex}.editor-body{flex:1;min-height:0;overflow:hidden}.editor-body>div,.editor-body .cm-editor{height:100%}.editor-body .cm-scroller{font-family:var(--font-mono)}.output-pane,.preview-pane{background:var(--console-bg);flex-direction:column;height:100%;display:flex}.preview-frame{background:#fff;border:0;flex:1;width:100%}.karel-tabs{background:var(--surface-2);border-radius:8px;gap:2px;padding:2px;display:flex}.karel-tabs .solution-tab:disabled{cursor:default}.karel-stage{background:linear-gradient(180deg, #e0f2fe 0%, var(--surface) 70%);flex:1;min-height:0;padding:12px;position:relative}:root[data-theme=dark] .karel-stage{background:linear-gradient(180deg, #0c1a2b 0%, var(--surface) 70%)}.karel-grid{width:100%;height:100%;display:block}.karel-cell{fill:#f1f5f9;stroke:#cbd5e1;stroke-width:.8px}.karel-cell.alt{fill:#e2e8f0}.karel-slab{fill:#94a3b8}.karel-border{fill:none;stroke:#64748b;stroke-width:2px}:root[data-theme=dark] .karel-cell{fill:#243040;stroke:#334155}:root[data-theme=dark] .karel-cell.alt{fill:#1e2835}:root[data-theme=dark] .karel-slab{fill:#0b1016}:root[data-theme=dark] .karel-border{stroke:#475569}.karel-wall-top{fill:#64748b}.karel-wall-front{fill:#334155}.karel-wall-side{fill:#1e293b}:root[data-theme=dark] .karel-wall-top{fill:#cbd5e1}:root[data-theme=dark] .karel-wall-front{fill:#94a3b8}:root[data-theme=dark] .karel-wall-side{fill:#64748b}.karel-label{fill:var(--muted);font-family:var(--font-ui);text-anchor:middle;font-size:11px}.karel-ball{transform-box:fill-box;transform-origin:50%;animation:.22s ease-out karel-pop}.karel-ball-shadow{fill:#0f172a38}.karel-ball-count{fill:#fff;font-family:var(--font-ui);text-anchor:middle;dominant-baseline:central;font-size:13px;font-weight:700}.karel-ball-count.small{font-size:8px}.karel-target{fill:none;stroke:var(--ok);stroke-width:2px;stroke-dasharray:4 3}.karel-dog{transition:transform var(--karel-step,.2s) ease-in-out}.karel-hop{animation:karel-hop var(--karel-step,.22s) ease-out}.karel-turn{transform-box:fill-box;transform-origin:50% 100%;animation:.16s ease-out karel-turn}.karel-dog-ear{fill:#8b5a2b}.karel-dog-head{fill:#d9a066;stroke:#6b4423;stroke-width:.8px}.karel-dog-leg{fill:#b7834f;stroke:#6b4423;stroke-width:.6px}.karel-dog-muzzle{fill:#f5dfbd}.karel-dog-eye{fill:#1f2937}.karel-dog-arrow{fill:var(--accent);opacity:.85}@keyframes karel-hop{50%{transform:translateY(-9px)}}@keyframes karel-turn{0%{transform:scaleX(.55)}}@keyframes karel-pop{0%{transform:scale(.2)}}@media (prefers-reduced-motion:reduce){.karel-dog,.karel-hop,.karel-turn,.karel-ball{transition:none;animation:none}}.karel-caption{color:var(--muted);font-size:12px;position:absolute;top:10px;left:12px}.karel-controls{border-top:1px solid var(--border);background:var(--surface);flex-shrink:0;align-items:center;gap:6px;min-height:40px;padding:4px 10px;display:flex}.karel-play{min-width:30px}.karel-scrub{min-width:60px;accent-color:var(--accent);flex:1}.karel-step{color:var(--muted);white-space:nowrap;align-items:center;gap:6px;font-size:12px;display:flex}.karel-step code{background:var(--code-bg);color:var(--text);border-radius:5px;padding:1px 6px}.karel-speed{border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;border-radius:6px;margin-left:auto;padding:3px 6px;font-size:12px}.karel-hint{color:var(--muted);margin-top:26px;font-size:14px}.karel-commands summary{cursor:pointer}.karel-commands[open] summary{margin-bottom:8px}.preview-url{border:1px solid var(--border);background:var(--bg);min-width:0;color:var(--text);font-family:var(--font-mono);border-radius:999px;flex:1;padding:4px 10px;font-size:12px}.preview-url:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.test-summary{border-radius:999px;padding:2px 10px;font-size:12px;font-weight:600}.test-summary.ok{background:var(--ok-soft);color:var(--ok)}.test-summary.bad{background:var(--bad-soft);color:var(--bad)}.console{font-family:var(--font-mono);flex:1;padding:10px 14px;font-size:13px;line-height:1.6;overflow-y:auto}.console-placeholder{color:var(--muted);font-family:var(--font-ui)}.console-line{white-space:pre-wrap;word-break:break-word;padding:1px 0}.console-line.system{color:var(--muted)}.console-line.warn{color:var(--warn)}.console-line.error{color:var(--bad)}.console-line.info{color:var(--accent)}.tests{border-top:1px dashed var(--border);margin-top:10px;padding-top:10px}.console>.tests:first-child{border-top:0;margin-top:0;padding-top:0}.tests-banner{background:var(--ok-soft);color:var(--ok);font-family:var(--font-ui);border-radius:8px;flex-wrap:wrap;align-items:center;gap:6px 12px;margin-bottom:8px;padding:8px 12px;font-weight:600;display:flex;position:relative;overflow:hidden}.tests-banner-next{font-weight:400}.tests-banner-progress{background:var(--ok);transform-origin:0;height:3px;animation:linear forwards banner-progress;position:absolute;bottom:0;left:0;right:0}@keyframes banner-progress{0%{transform:scaleX(0)}to{transform:scaleX(1)}}.tests-banner .btn{color:var(--ok);border-color:currentColor;margin-left:auto}.test{flex-wrap:wrap;gap:4px 10px;padding:3px 0;display:flex}.test-icon{width:14px;font-weight:700}.test.pass .test-icon{color:var(--ok)}.test.fail .test-icon{color:var(--bad)}.test-detail{color:var(--muted)}.test.fail .test-detail{color:var(--bad)}.modal-backdrop{z-index:50;background:#0f172a8c;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal{background:var(--surface);box-shadow:var(--shadow);border-radius:14px;flex-direction:column;width:min(520px,100%);max-height:85vh;display:flex}.modal-wide{width:min(900px,100%)}.modal-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-header h2{margin:0;font-size:18px}.modal-body{padding:18px 20px 22px;overflow-y:auto}.progress{color:var(--muted);align-items:center;gap:12px;margin-bottom:18px;font-size:14px;display:flex}.progress-bar{background:var(--surface-2);border-radius:999px;flex:1;height:8px;overflow:hidden}.progress-fill{background:var(--ok);height:100%;transition:width .3s}.difficulty-filter{gap:6px;margin-bottom:18px;display:flex}.filter-btn{border:1px solid var(--border);cursor:pointer;background:0 0;border-radius:999px;padding:5px 14px;font-size:13px;font-weight:500}.filter-btn span{color:var(--muted);margin-left:4px;font-size:12px}.filter-btn.active{background:var(--accent);border-color:var(--accent);color:#fff}.filter-btn.active span{color:#fffc}.questions-toolbar{flex-wrap:wrap;align-items:center;gap:10px 14px;margin-bottom:18px;display:flex}.questions-toolbar .search-input{flex:220px}.questions-toolbar .difficulty-filter{margin-bottom:0}.search-input{border:1px solid var(--border);background:var(--surface);width:100%;color:var(--text);font:inherit;border-radius:8px;padding:8px 12px;font-size:14px}.search-input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.toggle{color:var(--muted);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:6px;font-size:13px;display:flex}.difficulty-section{margin-bottom:20px}.difficulty-heading{border-bottom:2px solid var(--border);align-items:center;gap:8px;margin:0 0 10px;padding-bottom:6px;font-size:15px;display:flex}.difficulty-heading span{color:var(--muted);font-size:12px;font-weight:500}.difficulty-heading.easy{border-color:var(--ok)}.difficulty-heading.medium{border-color:#f59e0b}.difficulty-heading.hard{border-color:var(--bad)}.question-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:6px;display:grid}.question-link{border:1px solid var(--border);background:var(--surface);cursor:pointer;text-align:left;border-radius:8px;align-items:center;gap:10px;width:100%;padding:8px 10px;font-size:14px;display:flex}.question-link:hover{border-color:var(--accent)}.question-link.active{background:var(--accent-soft);border-color:var(--accent)}.question-link-body{flex-direction:column;min-width:0;display:flex}.question-link-title{text-overflow:ellipsis;white-space:nowrap;font-weight:500;overflow:hidden}.question-link-category{color:var(--muted);font-size:12px}.empty-note{color:var(--muted);text-align:center;padding:18px 0;font-size:14px}.check{background:var(--surface-2);width:22px;height:22px;color:var(--muted);border-radius:50%;flex-shrink:0;place-items:center;font-size:11px;display:grid}.check.done{background:var(--ok);color:#fff}.check.done.helped{background:var(--warn);color:var(--surface)}.progress-helped{color:var(--warn)}.resource-list li{flex-direction:column;padding:6px 0;display:flex}.resource-list a{color:var(--accent);font-weight:500;text-decoration:none}.resource-list a:hover{text-decoration:underline}.resource-list span{color:var(--muted);font-size:13px}.welcome p{margin-top:0;line-height:1.6}.welcome ol{margin-bottom:22px;padding-left:20px;line-height:1.9}.welcome kbd{background:var(--surface-2);border:1px solid var(--border);border-radius:4px;padding:0 5px;font-size:12px}.topbar .btn-ghost.active{color:#fff;background:#ffffff24}.resources-header{border-bottom:1px solid var(--border);grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;padding:10px 14px;display:grid}.resources-header .btn{justify-self:start}.resources-header h2{color:var(--muted);margin:0;font-size:17px}.resources-track{color:var(--muted);justify-self:end;font-size:12px}.resources-scroll{padding:14px 16px}.resource-tree{flex-direction:column;gap:4px;display:flex}.resource-group-title{text-align:left;border:1px solid var(--border);background:var(--surface);cursor:pointer;width:100%;color:var(--muted);border-radius:4px;align-items:center;gap:8px;padding:7px 12px;font-size:16px;font-weight:700;display:flex}.resource-group-title:hover,.resource-group-title.open{background:var(--surface-2);color:var(--text)}.caret{width:14px;font-size:15px}.resources-scroll .resource-list{margin:0;padding:0;list-style:none}.affiliate-note{color:var(--muted);margin:4px 0 0;font-size:12px}.resource-children{border-left:4px solid #38bdf8;flex-direction:column;margin:4px 0 6px 2px;padding-left:12px;display:flex}.resources-heading{flex-direction:column;align-items:center;display:flex}.resources-heading span{color:var(--muted);font-size:12px}.resources-search{padding:10px 16px 0}.resources-search input{border:1px solid var(--border);background:var(--surface);width:100%;color:var(--text);font:inherit;border-radius:8px;padding:8px 12px;font-size:14px}.resources-search input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.resource-group-name{flex:1}.resource-group-count{color:var(--muted);font-size:12px;font-weight:500}.topic-list{flex-direction:column;gap:2px;display:flex}.topic{text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;align-items:flex-start;gap:10px;width:100%;padding:7px 10px;display:flex}.topic:hover{background:var(--surface-2)}.topic.active{background:var(--accent-soft);border-color:var(--accent)}.topic-check{border:2px solid var(--border);border-radius:50%;flex-shrink:0;place-items:center;width:18px;height:18px;margin-top:2px;font-size:10px;display:grid}.topic.read .topic-check{background:var(--ok);border-color:var(--ok);color:#fff}.topic-body{flex-direction:column;gap:2px;min-width:0;display:flex}.topic-title{font-size:15px;font-weight:600}.topic:hover .topic-title{color:var(--accent)}.topic-summary{color:var(--muted);font-size:13px;line-height:1.45}.topic-summary code{background:var(--code-bg);border-radius:4px;padding:0 4px;font-size:.9em}.article{max-width:760px;margin:0 auto}.article h3{margin:26px 0 8px;font-size:19px}.article-text{margin:0 0 12px;line-height:1.7}.article-text code{background:var(--code-bg);border-radius:5px;padding:1px 6px;font-size:.9em}.article-text a{color:var(--accent)}.article-docs{border-top:1px solid var(--border);margin-top:26px;padding-top:16px}.code-sample{border:1px solid var(--border);border-radius:8px;margin-bottom:8px;font-size:14px;overflow:hidden}.code-sample .cm-editor{padding:6px 4px}.code-sample .cm-scroller{font-family:var(--font-mono)}.code-sample-bar{border-top:1px solid var(--border);background:var(--surface-2);justify-content:flex-end;gap:6px;padding:6px 8px;display:flex}.code-sample-output{border-top:1px solid var(--border);background:var(--console-bg);font-family:var(--font-mono);padding:8px 12px;font-size:13px;line-height:1.6}.code-sample-note{color:var(--muted);justify-content:flex-start;font-size:12px}.code-sample-preview{border:0;border-top:1px solid var(--border);background:#fff;width:100%;height:180px;display:block}.article-intro{font-size:16px}.article-toc{background:var(--surface-2);border-radius:8px;flex-wrap:wrap;align-items:center;gap:6px;margin:4px 0 8px;padding:10px 12px;display:flex}.article-toc-label{color:var(--muted);text-transform:uppercase;letter-spacing:.4px;margin-right:4px;font-size:12px;font-weight:600}.toc-chip{border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:999px;padding:3px 10px;font-size:13px}.toc-chip:hover{border-color:var(--accent);color:var(--accent)}.article-section{scroll-margin-top:12px}.article-nav{border-top:1px solid var(--border);justify-content:space-between;gap:12px;margin-top:30px;padding-top:16px;display:flex}.article-nav-btn{border:1px solid var(--border);background:var(--surface);cursor:pointer;text-align:left;border-radius:8px;flex-direction:column;gap:2px;max-width:48%;padding:10px 14px;font-weight:600;display:flex}.article-nav-btn span{color:var(--muted);font-size:12px;font-weight:500}.article-nav-btn.next{text-align:right;margin-left:auto}.article-nav-btn:hover{border-color:var(--accent);color:var(--accent)}.topbar-progress{align-items:center;gap:8px;display:flex}.topbar-progress-bar{background:#ffffff26;border-radius:999px;width:48px;height:6px;overflow:hidden}.topbar-progress-bar span{background:#4ade80;height:100%;transition:width .3s;display:block}.topbar-count{opacity:.75;font-size:12px}.topbar-divider{background:#ffffff26;width:1px;height:22px;margin:0 4px}.btn-danger{background:var(--bad);color:#fff}.btn-danger:hover{filter:brightness(1.1)}.confirm p{margin-top:0;line-height:1.6}.confirm ul{margin:0 0 14px;padding-left:20px;line-height:1.8}.confirm-note{color:var(--muted);font-size:14px}.confirm-warning{color:var(--bad);font-weight:600}.confirm-actions{justify-content:flex-end;gap:8px;display:flex}.certificate{flex-direction:column;gap:14px;display:flex}.certificate p{margin:0;line-height:1.6}.certificate-canvas{border:1px solid var(--border);border-radius:8px;width:100%;height:auto}.certificate-hint{color:var(--muted);margin:-8px 0 18px;font-size:13px}@media (width<=1000px){.topbar{gap:12px}.track-tab{padding:6px 9px}.topbar .btn-ghost{padding:7px 9px}.topbar-divider{display:none}}@media (width<=760px){.topbar{flex-wrap:wrap;gap:6px 8px;height:auto;padding:8px 10px}.track-tabs{scrollbar-width:none;order:3;width:100%;overflow-x:auto}.track-tab{white-space:nowrap;flex:1;justify-content:center;padding:6px 8px}.track-tab.track-soon{display:none}.menu-buttons{scrollbar-width:none;gap:2px;min-width:0;overflow-x:auto}.topbar .btn-ghost{padding:6px 8px;font-size:13px}.topbar .icon-btn{padding:6px}.label-full{display:none}.label-short{display:inline}.question-scroll{padding:16px}.question-title{font-size:20px}.pane-header{padding:0 8px}.editor-body .cm-editor{font-size:max(16px,1em)}.search-input,.resources-search input,.contact-form input,.contact-form select,.contact-form textarea{font-size:16px}.modal-backdrop{padding:10px}.modal{max-height:calc(100dvh - 20px)}.modal-header,.modal-body{padding-left:14px;padding-right:14px}.article-nav-btn{max-width:100%}.contact-inner h1{font-size:24px}.floatingchat-container-wrap,.floatingchat-container-wrap-mobi{width:160px!important;transition:transform .25s!important;bottom:64px!important}:root.kofi-tucked .floatingchat-container-wrap,:root.kofi-tucked .floatingchat-container-wrap-mobi{transform:translate(148px)}.floating-chat-kofi-popup-iframe,.floating-chat-kofi-popup-iframe-mobi{max-width:calc(100vw - 32px);bottom:124px!important}}
