.xterm{cursor:text;position:relative;user-select:none;-ms-user-select:none;-webkit-user-select:none}.xterm.focus,.xterm:focus{outline:0}.xterm .xterm-helpers{position:absolute;top:0;z-index:5}.xterm .xterm-helper-textarea{padding:0;border:0;margin:0;position:absolute;opacity:0;left:-9999em;top:0;width:0;height:0;z-index:-5;white-space:nowrap;overflow:hidden;resize:none}.xterm .composition-view{background:#000;color:#fff;display:none;position:absolute;white-space:nowrap;z-index:1}.xterm .composition-view.active{display:block}.xterm .xterm-viewport{background-color:#000;overflow-y:scroll;cursor:default;position:absolute;right:0;left:0;top:0;bottom:0}.xterm .xterm-screen{position:relative}.xterm .xterm-screen canvas{position:absolute;left:0;top:0}.xterm .xterm-scroll-area{visibility:hidden}.xterm-char-measure-element{display:inline-block;visibility:hidden;position:absolute;top:0;left:-9999em;line-height:normal}.xterm.enable-mouse-events{cursor:default}.xterm .xterm-cursor-pointer,.xterm.xterm-cursor-pointer{cursor:pointer}.xterm.column-select.focus{cursor:crosshair}.xterm .xterm-accessibility:not(.debug),.xterm .xterm-message{position:absolute;left:0;top:0;bottom:0;right:0;z-index:10;color:transparent;pointer-events:none}.xterm .xterm-accessibility-tree:not(.debug) ::selection{color:transparent}.xterm .xterm-accessibility-tree{-webkit-user-select:text;user-select:text;white-space:pre}.xterm .live-region{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.xterm-dim{opacity:1!important}.xterm-underline-1{text-decoration:underline}.xterm-underline-2{text-decoration:double underline}.xterm-underline-3{text-decoration:wavy underline}.xterm-underline-4{text-decoration:dotted underline}.xterm-underline-5{text-decoration:dashed underline}.xterm-overline{text-decoration:overline}.xterm-overline.xterm-underline-1{text-decoration:overline underline}.xterm-overline.xterm-underline-2{text-decoration:overline double underline}.xterm-overline.xterm-underline-3{text-decoration:overline wavy underline}.xterm-overline.xterm-underline-4{text-decoration:overline dotted underline}.xterm-overline.xterm-underline-5{text-decoration:overline dashed underline}.xterm-strikethrough{text-decoration:line-through}.xterm-screen .xterm-decoration-container .xterm-decoration{z-index:6;position:absolute}.xterm-screen .xterm-decoration-container .xterm-decoration.xterm-decoration-top-layer{z-index:7}.xterm-decoration-overview-ruler{z-index:8;position:absolute;top:0;right:0;pointer-events:none}.xterm-decoration-top{z-index:2;position:relative}.lt-loading{padding:1rem;color:var(--text3);font-size:.8rem;font-family:var(--font-mono)}.lt-root{flex:1;overflow-y:auto;padding:.5rem 0}.lt-header{padding:.5rem 1rem .75rem;border-bottom:1px solid var(--border)}.lt-header-label{font-size:.7rem;font-weight:700;color:var(--text3);letter-spacing:.08em;text-transform:uppercase}.lt-cat-btn{width:100%;display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:none;border:none;color:var(--text2);cursor:pointer;text-align:left;transition:background .15s}.lt-cat-btn:hover{background:var(--bg3)}.lt-chevron{transform:none;transition:transform .15s;flex-shrink:0;color:var(--text3)}.lt-chevron--open{transform:rotate(90deg)}.lt-cat-icon{flex-shrink:0;color:var(--accent)}.lt-cat-title{flex:1;font-weight:700;font-size:.8rem;font-family:var(--font-ui)}.lt-cat-progress{font-size:.68rem;color:var(--green);font-family:var(--font-mono)}.lt-lesson-btn{width:100%;display:flex;align-items:center;gap:.6rem;padding:.45rem 1rem .45rem 2.5rem;background:none;border:none;border-left:2px solid transparent;color:var(--text2);cursor:pointer;text-align:left;transition:all .15s}.lt-lesson-btn:hover:not(.lt-lesson-btn--active){background:var(--bg3)}.lt-lesson-btn--active{background:var(--bg3);border-left:2px solid var(--accent);color:var(--text)}.lt-lesson-icon{flex-shrink:0}.lt-lesson-title{flex:1;font-size:.82rem;line-height:1.4;font-family:var(--font-ui)}.lt-lesson-duration{font-size:.65rem;color:var(--text3);font-family:var(--font-mono);flex-shrink:0}.lt-lesson-duration--beginner{color:var(--green)}.lt-lesson-duration--intermediate{color:var(--blue)}.lt-lesson-duration--advanced{color:var(--orange)}.lp-root{display:flex;flex-direction:column;height:100%;overflow:hidden}.lp-header{padding:1rem;border-bottom:1px solid var(--border);background:var(--bg2);flex-shrink:0}.lp-header-meta{display:flex;align-items:center;gap:.5rem;margin-bottom:.3rem}.lp-badge{font-size:.65rem;font-weight:700;padding:2px 8px;border-radius:10px;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.04em}.lp-badge--beginner{color:var(--green);background:var(--green)22}.lp-badge--intermediate{color:var(--blue);background:var(--blue)22}.lp-badge--advanced{color:var(--orange);background:var(--orange)22}.lp-duration{font-size:.72rem;color:var(--text3);font-family:var(--font-mono)}.lp-title{font-family:var(--font-ui);font-weight:800;font-size:1.1rem;color:var(--text);line-height:1.2}.lp-scroll{flex:1;overflow-y:auto;padding:1.25rem}.lp-mission{display:flex;align-items:center;gap:.5rem;background:var(--bg3);border-left:2px solid var(--accent);border-radius:var(--radius);padding:.5rem .75rem;margin-bottom:1rem}.lp-mission-icon{flex-shrink:0}.lp-mission-label{font-size:.72rem;font-weight:700;color:var(--accent);font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.06em}.lp-tasks-panel{border-top:1px solid var(--border);background:var(--bg2);flex-shrink:0;max-height:45%;overflow-y:auto}.lp-tasks-header{padding:.6rem 1rem;display:flex;align-items:center;gap:.5rem;border-bottom:1px solid var(--border)}.lp-tasks-label{font-size:.7rem;font-weight:700;color:var(--text3);text-transform:uppercase;letter-spacing:.06em}.lp-tasks-count{font-size:.7rem;font-family:var(--font-mono);color:var(--text3)}.lp-tasks-count--done{color:var(--green)}.lp-tasks-complete-badge{margin-left:auto;font-size:.68rem;color:var(--green);background:var(--green)22;padding:2px 8px;border-radius:10px;font-weight:700}.lp-task{padding:.6rem 1rem;border-bottom:1px solid var(--border);opacity:1;transition:opacity .2s}.lp-task--last{border-bottom:none}.lp-task--done{opacity:.7}.lp-task-row{display:flex;align-items:flex-start;gap:.6rem}.lp-task-icon{flex-shrink:0;margin-top:2px}.lp-task-body{flex:1}.lp-task-text{font-size:.82rem;color:var(--text);text-decoration:none;margin:0;line-height:1.4}.lp-task-text--done{color:var(--text3);text-decoration:line-through}.lp-task-xp{margin-left:.5rem;font-size:.68rem;color:var(--text3);font-family:var(--font-mono)}.lp-hint-wrap{margin-top:.4rem}.lp-hint-btn{background:none;border:none;cursor:pointer;color:var(--text3);font-size:.72rem;display:flex;align-items:center;gap:.3rem;padding:0;font-family:var(--font-ui)}.lp-hint-box{margin-top:.3rem;padding:.4rem .6rem;background:var(--bg3);border-radius:var(--radius);border-left:2px solid var(--accent);font-size:.78rem;font-family:var(--font-mono);color:var(--text2);line-height:1.5}.ne-root{position:absolute;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;flex-direction:column;background:#0d0f10;font-family:Space Mono,monospace;font-size:13px;color:#e4e6e8}.ne-titlebar{background:#1a1d1f;border-bottom:1px solid #2a2d2f;padding:3px 0;text-align:center;font-size:12px;color:#e4e6e8;flex-shrink:0}.ne-titlebar-version{color:#555d66}.ne-titlebar-filename{font-weight:700}.ne-titlebar-modified{color:#e8f542}.ne-editor-area{flex:1;overflow:hidden;position:relative}.ne-hidden-input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}.ne-lines{height:100%;overflow-y:hidden;padding:2px 0}.ne-line-row{display:flex;min-height:1.6em}.ne-line-number{width:40px;flex-shrink:0;text-align:right;padding-right:8px;color:#555d66;-webkit-user-select:none;user-select:none;font-size:11px}.ne-line-content{flex:1;white-space:pre;color:#e4e6e8}.ne-cursor{background:#e8f542;color:#0d0f10;border-right:none}.ne-cursor--eol{border-right:2px solid #e8f542}.ne-statusbar{background:#1a1d1f;border-top:1px solid #2a2d2f;padding:2px 8px;font-size:11px;color:#e8f542;display:flex;justify-content:space-between;flex-shrink:0}.ne-statusbar-right{color:#555d66}.ne-shortcutbar{background:#1a1d1f;padding:3px 4px;display:flex;flex-wrap:wrap;gap:0 16px;font-size:11px;flex-shrink:0}.ne-shortcut-key{background:#e4e6e8;color:#0d0f10;padding:0 3px;border-radius:2px;margin-right:3px;font-weight:700}.ne-shortcut-label{color:#c8ccd0}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.vt-root{display:flex;flex-direction:column;height:100%;background:#0d0f10;font-family:Space Mono,monospace;font-size:13px;position:relative}.vt-toolbar{display:flex;align-items:center;gap:6px;padding:6px 12px;background:#1a1d1f;border-bottom:1px solid #2a2d2f;flex-shrink:0}.vt-toolbar-dots{display:flex;gap:5px}.vt-toolbar-dot{width:11px;height:11px;border-radius:50%}.vt-toolbar-dot--red{background:#e05c5c}.vt-toolbar-dot--yellow{background:#e8a042}.vt-toolbar-dot--green{background:#4caf79}.vt-toolbar-title{flex:1;font-size:11px;color:#555d66;margin-left:8px}.vt-toolbar-status{display:flex;align-items:center;gap:4px;font-size:10px;color:#4caf79}.vt-toolbar-status-dot{width:6px;height:6px;border-radius:50%;background:#4caf79}.vt-reset-btn{background:none;border:1px solid #2a2d2f;color:#555d66;border-radius:4px;padding:2px 8px;font-size:10px;cursor:pointer;font-family:inherit}.vt-body{flex:1;overflow-y:auto;padding:12px 14px;line-height:1.6;cursor:text}.vt-line{white-space:pre-wrap;word-break:break-word}.vt-prompt-text{color:#4caf79;font-weight:700}.vt-cmd-text{color:#e4e6e8}.vt-banner{color:#e8f542}.vt-out{color:#c8ccd0}.vt-err{color:#e05c5c}.vt-loading{color:#555d66}.vt-input-row{display:flex;align-items:center;white-space:pre-wrap}.vt-prompt{color:#4caf79;font-weight:700;flex-shrink:0}.vt-input-wrap{position:relative;flex:1}.vt-hidden-input{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;pointer-events:auto;background:transparent;border:none;outline:none;font-family:inherit;font-size:inherit}.vt-hidden-input--inactive{pointer-events:none}.vt-visible-text{color:#e4e6e8;pointer-events:none}.vt-loading-ellipsis{color:#555d66}.vt-cursor{background:#e8f542;color:#0d0f10;animation:blink 1s step-end infinite;min-width:.6ch;display:inline-block}.terminal-panel{display:flex;flex-direction:column;height:100%}.topbar{height:48px;background:var(--bg2);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.75rem;padding:0 1rem;flex-shrink:0;-webkit-user-select:none;user-select:none}.topbar-icon-btn{background:none;border:none;color:var(--text2);cursor:pointer;padding:4px;border-radius:var(--radius);display:flex;align-items:center}.topbar-logo{display:flex;align-items:center;gap:.5rem}.topbar-logo-text{font-family:var(--font-ui);font-weight:800;font-size:.95rem;letter-spacing:-.02em}.topbar-logo-accent{color:var(--accent)}.topbar-logo-sub{color:var(--text2);font-weight:400}.topbar-divider{width:1px;height:20px;background:var(--border);margin:0 .25rem}.topbar-links{display:flex;align-items:center;gap:.25rem}.topbar-link{color:var(--text3);font-size:.72rem;font-family:var(--font-mono);text-decoration:none;padding:3px 7px;border-radius:var(--radius);border:1px solid transparent;transition:all .15s}.topbar-link:hover{color:var(--text);border-color:var(--border)}.topbar-spacer{flex:1}.topbar-search-btn{display:flex;align-items:center;gap:.4rem;padding:4px 10px;border-radius:var(--radius);background:var(--bg3);border:1px solid var(--border);cursor:pointer}.topbar-search-label{font-size:.72rem;color:var(--text3);font-family:var(--font-mono)}.topbar-kbd{font-size:.65rem;color:var(--text3);font-family:var(--font-mono);border:1px solid var(--border);border-radius:4px;padding:0 4px}.topbar-progress{display:flex;align-items:center;gap:.5rem}.topbar-progress-text{font-size:.78rem;color:var(--text2);font-family:var(--font-mono)}.topbar-progress-track{width:60px;height:4px;background:var(--bg3);border-radius:2px;overflow:hidden}.topbar-progress-fill{height:100%;background:var(--green);border-radius:2px;transition:width .3s}.topbar-level-btn{display:flex;align-items:center;gap:.4rem;padding:4px 10px;border-radius:10px;background:var(--accent)22;border:none;cursor:pointer}.topbar-level-label{font-size:.72rem;font-weight:700;color:var(--accent);font-family:var(--font-mono)}.topbar-level-track{width:50px;height:4px;background:var(--bg3);border-radius:2px;overflow:hidden}.topbar-level-fill{height:100%;background:var(--accent);border-radius:2px;transition:width .3s}.topbar-virtual{display:flex;align-items:center;gap:.4rem;padding:4px 10px;border-radius:20px;background:var(--bg3);border:1px solid var(--green)33}.topbar-virtual-dot{width:8px;height:8px;border-radius:50%;background:var(--green);animation:pulse 2s infinite}.topbar-virtual-label{font-size:.75rem;color:var(--green);font-family:var(--font-mono)}.welcome-root{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;background:var(--bg);gap:2rem;overflow-y:auto}.welcome-hero{text-align:center;max-width:400px}.welcome-icon{width:64px;height:64px;background:var(--accent)22;border:1px solid var(--accent)44;border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 1.25rem}.welcome-title{font-family:var(--font-ui);font-weight:800;font-size:1.6rem;color:var(--text);line-height:1.15;margin-bottom:.75rem;letter-spacing:-.03em}.welcome-title-accent{color:var(--accent)}.welcome-desc{color:var(--text2);font-size:.9rem;line-height:1.6;margin-bottom:1.5rem}.welcome-start-btn{display:inline-flex;align-items:center;gap:.5rem;padding:10px 24px;background:var(--accent);color:var(--bg);border:none;border-radius:var(--radius);cursor:pointer;font-size:.9rem;font-weight:800;font-family:var(--font-ui);opacity:1;transition:opacity .2s,transform .1s}.welcome-start-btn:hover:not(:disabled){transform:scale(1.02)}.welcome-start-btn--connecting{cursor:not-allowed;opacity:.7}.welcome-hint{font-size:.72rem;color:var(--text3);margin-top:.5rem}.welcome-features{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;width:100%;max-width:400px}.welcome-feature-card{padding:.75rem;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius)}.welcome-feature-head{display:flex;align-items:center;gap:.4rem;margin-bottom:.2rem}.welcome-feature-label{font-weight:700;font-size:.78rem;color:var(--text)}.welcome-feature-desc{font-size:.72rem;color:var(--text3);margin:0}.welcome-progress-note{padding:.6rem 1rem;background:var(--green)11;border:1px solid var(--green)33;border-radius:var(--radius);font-size:.78rem;color:var(--green);text-align:center}.welcome-arrow-hint{font-size:.75rem;color:var(--text3);text-align:center}.bp-tile{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.5rem;padding:.75rem;opacity:.35}.bp-tile--earned{opacity:1}.bp-icon-ring{width:56px;height:56px;border-radius:16px;position:relative;display:flex;align-items:center;justify-content:center;background:var(--bg3);border:1px solid var(--border)}.bp-icon-ring--earned{background:var(--accent)22;border:1px solid var(--accent)44}.bp-lock-badge{position:absolute;bottom:-4px;right:-4px;width:18px;height:18px;border-radius:50%;background:var(--bg2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center}.bp-title{font-size:.75rem;font-weight:700;color:var(--text3);font-family:var(--font-ui)}.bp-title--earned{color:var(--text)}.bp-desc{font-size:.68rem;color:var(--text3);line-height:1.3}.bp-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:600;background:#0009;display:flex;align-items:center;justify-content:center;padding:1rem}.bp-panel{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);max-width:560px;width:100%;max-height:80vh;display:flex;flex-direction:column}.bp-header{display:flex;align-items:center;justify-content:space-between;padding:.85rem 1rem;border-bottom:1px solid var(--border)}.bp-header-title{font-family:var(--font-ui);font-weight:800;font-size:.95rem}.bp-header-count{font-size:.72rem;color:var(--text3);font-family:var(--font-mono)}.bp-close-btn{background:none;border:none;color:var(--text2);cursor:pointer;padding:4px}.bp-grid{overflow-y:auto;padding:.75rem;display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:.25rem}.toast-stack{position:fixed;top:56px;right:1rem;z-index:500;display:flex;flex-direction:column;gap:.5rem;pointer-events:none}.toast{display:flex;align-items:center;gap:.5rem;border-radius:var(--radius);padding:.5rem .85rem;font-family:var(--font-mono);font-size:.8rem;font-weight:700;box-shadow:0 4px 16px #0000004d}.toast--xp{background:var(--accent)11;border:1px solid var(--accent)33;color:var(--accent)}.toast--badge{background:var(--green)11;border:1px solid var(--green)33;color:var(--green)}.cp-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:700;background:#0009;display:flex;align-items:flex-start;justify-content:center;padding:12vh 1rem 1rem}.cp-panel{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);max-width:560px;width:100%;max-height:60vh;display:flex;flex-direction:column;box-shadow:0 12px 40px #00000080;overflow:hidden}.cp-search-row{display:flex;align-items:center;gap:.6rem;padding:.75rem 1rem;border-bottom:1px solid var(--border)}.cp-search-icon{flex-shrink:0}.cp-input{flex:1;background:none;border:none;outline:none;color:var(--text);font-family:var(--font-ui);font-size:.9rem}.cp-esc{font-size:.65rem;color:var(--text3);font-family:var(--font-mono);border:1px solid var(--border);border-radius:4px;padding:1px 5px;flex-shrink:0}.cp-results{overflow-y:auto}.cp-empty{padding:1.5rem 1rem;text-align:center;color:var(--text3);font-size:.85rem;font-family:var(--font-ui)}.cp-item{width:100%;display:flex;align-items:center;gap:.6rem;padding:.55rem 1rem;background:none;border:none;border-left:2px solid transparent;cursor:pointer;text-align:left}.cp-item--selected{background:var(--bg3);border-left:2px solid var(--accent)}.cp-item-icon{flex-shrink:0}.cp-item-body{flex:1;min-width:0}.cp-item-title{font-size:.85rem;color:var(--text);font-family:var(--font-ui);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.cp-item-cat{font-size:.7rem;color:var(--text3);font-family:var(--font-mono)}.cp-item-diff{font-size:.65rem;color:var(--text3);font-family:var(--font-mono);flex-shrink:0}.cp-item-diff--beginner{color:var(--green)}.cp-item-diff--intermediate{color:var(--blue)}.cp-item-diff--advanced{color:var(--orange)}.cp-item-enter{flex-shrink:0}.app-mobile{display:flex;flex-direction:column;height:100dvh;background:var(--bg);position:relative;overflow:hidden}.mobile-sidebar-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;display:flex;top:var(--topbar-h, 44px)}.mobile-sidebar-panel{width:var(--sidebar-w);background:var(--bg2);border-right:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column}.mobile-sidebar-dim{flex:1;background:#0009}.mobile-content{flex:1;overflow:hidden;display:flex;flex-direction:column;padding-bottom:48px;transition:padding-bottom .3s ease}.mobile-content--terminal-open{padding-bottom:50vh}.terminal-drawer{position:fixed;bottom:0;left:0;right:0;height:48px;transition:height .3s ease;background:var(--bg2);border-top:1px solid var(--border);display:flex;flex-direction:column;z-index:100}.terminal-drawer--open{height:50vh;border-top:2px solid var(--accent)}.terminal-handle{height:48px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;cursor:pointer;-webkit-user-select:none;user-select:none;flex-shrink:0}.terminal-handle-left{display:flex;align-items:center;gap:10px}.terminal-prompt-icon{font-family:var(--font-mono);font-size:13px;color:var(--accent)}.terminal-label{font-size:13px;color:var(--text2);font-family:var(--font-ui)}.terminal-tag{font-size:10px;background:var(--bg3);color:var(--text3);padding:2px 6px;border-radius:var(--radius);border:1px solid var(--border);font-family:var(--font-mono)}.terminal-caret{font-size:11px;color:var(--text3)}.terminal-body{flex:1;overflow:hidden;display:none;flex-direction:column}.terminal-body--open{display:flex}.app-desktop{display:flex;flex-direction:column;height:100vh;background:var(--bg)}.desktop-content{display:flex;flex:1;overflow:hidden}.desktop-sidebar{width:0;min-width:0;overflow:hidden;transition:width .2s ease,min-width .2s ease;border-right:1px solid var(--border);background:var(--bg2);display:flex;flex-direction:column}.desktop-sidebar--open{width:var(--sidebar-w);min-width:var(--sidebar-w)}.desktop-main{flex:1;display:flex;overflow:hidden}.desktop-lesson-pane{width:42%;border-right:1px solid var(--border);overflow:hidden;display:flex;flex-direction:column}.desktop-terminal-pane{flex:1;overflow:hidden;display:flex;flex-direction:column}:root{--bg: #0d0e0f;--bg2: #141516;--bg3: #1c1e20;--border: #2a2d30;--accent: #e8f542;--accent2: #c8d400;--text: #e4e6e8;--text2: #8a9099;--text3: #555d66;--green: #4caf79;--red: #e05c5c;--blue: #5b9bd5;--orange: #e89d42;--font-mono: "Space Mono", "Courier New", monospace;--font-ui: "Syne", system-ui, sans-serif;--radius: 6px;--sidebar-w: 280px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-family:var(--font-ui);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg2)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text3)}::selection{background:var(--accent);color:var(--bg)}.lesson-content h1{font-family:var(--font-ui);font-size:1.5rem;font-weight:800;color:var(--accent);margin-bottom:1rem;line-height:1.2}.lesson-content h2{font-family:var(--font-ui);font-size:1.05rem;font-weight:700;color:var(--text);margin:1.4rem 0 .6rem;padding-bottom:.3rem;border-bottom:1px solid var(--border)}.lesson-content h3{font-size:.95rem;font-weight:600;color:var(--text2);margin:1rem 0 .4rem}.lesson-content p{color:var(--text2);margin-bottom:.75rem;line-height:1.7}.lesson-content code{font-family:var(--font-mono);font-size:.82rem;background:var(--bg3);color:var(--accent);padding:1px 5px;border-radius:3px;border:1px solid var(--border)}.lesson-content pre{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;margin:.75rem 0;overflow-x:auto;position:relative}.lesson-content pre code{background:none;border:none;padding:0;color:var(--text);font-size:.8rem;line-height:1.7}.lesson-content strong{color:var(--text);font-weight:700}.lesson-content em{color:var(--accent);font-style:italic}.lesson-content ul,.lesson-content ol{padding-left:1.25rem;margin-bottom:.75rem}.lesson-content li{color:var(--text2);margin-bottom:.25rem;line-height:1.6}.lesson-content li code{font-size:.8rem}.lesson-content table{width:100%;border-collapse:collapse;margin:.75rem 0;font-size:.85rem}.lesson-content th{background:var(--bg3);color:var(--accent);font-family:var(--font-ui);font-weight:700;text-align:left;padding:.5rem .75rem;border-bottom:1px solid var(--border)}.lesson-content td{padding:.4rem .75rem;border-bottom:1px solid var(--border);color:var(--text2)}.lesson-content td code{font-size:.78rem}.lesson-content tr:last-child td{border-bottom:none}.lesson-content blockquote{border-left:3px solid var(--accent);padding:.5rem 1rem;margin:.75rem 0;background:var(--bg3);border-radius:0 var(--radius) var(--radius) 0}.lesson-content blockquote p{color:var(--text2);margin:0}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}.animate-in{animation:fadeIn .2s ease-out}.xterm{height:100%!important}.xterm-viewport{background:transparent!important}.pct-0{width:0%}.pct-1{width:1%}.pct-2{width:2%}.pct-3{width:3%}.pct-4{width:4%}.pct-5{width:5%}.pct-6{width:6%}.pct-7{width:7%}.pct-8{width:8%}.pct-9{width:9%}.pct-10{width:10%}.pct-11{width:11%}.pct-12{width:12%}.pct-13{width:13%}.pct-14{width:14%}.pct-15{width:15%}.pct-16{width:16%}.pct-17{width:17%}.pct-18{width:18%}.pct-19{width:19%}.pct-20{width:20%}.pct-21{width:21%}.pct-22{width:22%}.pct-23{width:23%}.pct-24{width:24%}.pct-25{width:25%}.pct-26{width:26%}.pct-27{width:27%}.pct-28{width:28%}.pct-29{width:29%}.pct-30{width:30%}.pct-31{width:31%}.pct-32{width:32%}.pct-33{width:33%}.pct-34{width:34%}.pct-35{width:35%}.pct-36{width:36%}.pct-37{width:37%}.pct-38{width:38%}.pct-39{width:39%}.pct-40{width:40%}.pct-41{width:41%}.pct-42{width:42%}.pct-43{width:43%}.pct-44{width:44%}.pct-45{width:45%}.pct-46{width:46%}.pct-47{width:47%}.pct-48{width:48%}.pct-49{width:49%}.pct-50{width:50%}.pct-51{width:51%}.pct-52{width:52%}.pct-53{width:53%}.pct-54{width:54%}.pct-55{width:55%}.pct-56{width:56%}.pct-57{width:57%}.pct-58{width:58%}.pct-59{width:59%}.pct-60{width:60%}.pct-61{width:61%}.pct-62{width:62%}.pct-63{width:63%}.pct-64{width:64%}.pct-65{width:65%}.pct-66{width:66%}.pct-67{width:67%}.pct-68{width:68%}.pct-69{width:69%}.pct-70{width:70%}.pct-71{width:71%}.pct-72{width:72%}.pct-73{width:73%}.pct-74{width:74%}.pct-75{width:75%}.pct-76{width:76%}.pct-77{width:77%}.pct-78{width:78%}.pct-79{width:79%}.pct-80{width:80%}.pct-81{width:81%}.pct-82{width:82%}.pct-83{width:83%}.pct-84{width:84%}.pct-85{width:85%}.pct-86{width:86%}.pct-87{width:87%}.pct-88{width:88%}.pct-89{width:89%}.pct-90{width:90%}.pct-91{width:91%}.pct-92{width:92%}.pct-93{width:93%}.pct-94{width:94%}.pct-95{width:95%}.pct-96{width:96%}.pct-97{width:97%}.pct-98{width:98%}.pct-99{width:99%}.pct-100{width:100%}