:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#f2f7fc;background:#050e1a;font-synthesis:none;text-rendering:optimizeLegibility;--bg: #050e1a;--surface: #0a1a2c;--surface-raised: #10243a;--surface-soft: #142b45;--line: rgba(202, 222, 241, .12);--line-strong: rgba(202, 222, 241, .21);--text: #f2f7fc;--muted: #9fb2c6;--faint: #8499ae;--mint: #55adff;--mint-bright: #a6d7ff;--mint-wash: rgba(0, 63, 128, .32);--coral: #ff918a;--coral-wash: rgba(255, 145, 138, .11);--amber: #f0c86f;--amber-wash: rgba(240, 200, 111, .11);--blue: #79bff2;--radius-lg: 20px;--radius-md: 14px;--shadow: 0 24px 70px rgba(0, 18, 36, .42)}*{box-sizing:border-box}html{min-width:320px;min-height:100%;background:var(--bg)}body{min-width:320px;min-height:100vh;margin:0;background:radial-gradient(circle at 82% 3%,rgba(0,63,128,.28),transparent 26rem),radial-gradient(circle at 7% 96%,rgba(121,191,242,.08),transparent 28rem),var(--bg)}body:before{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;background-image:linear-gradient(rgba(255,255,255,.017) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.017) 1px,transparent 1px);background-size:42px 42px;content:"";-webkit-mask-image:linear-gradient(to bottom,black,transparent 82%);mask-image:linear-gradient(to bottom,black,transparent 82%);pointer-events:none}button,input{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible{outline:3px solid rgba(166,215,255,.42);outline-offset:3px}code,kbd,.terminal-screen{font-family:SFMono-Regular,Cascadia Code,Consolas,Liberation Mono,monospace}.sr-only,.sr-only-focusable:not(:focus){position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:12px;left:12px;z-index:100;padding:10px 14px;border-radius:10px;background:var(--mint);color:#03111f;font-weight:700}.app-shell{width:min(1600px,100%);min-height:100vh;margin:0 auto;padding:0 28px 32px}.app-header{position:relative;z-index:2;display:grid;grid-template-columns:minmax(220px,1fr) minmax(280px,440px) minmax(220px,1fr);align-items:center;min-height:94px;gap:28px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px}.brand__mark{display:grid;width:42px;height:42px;place-items:center;border:1px solid rgba(85,173,255,.2);border-radius:13px;background:linear-gradient(145deg,#003f80b8,#55adff14);color:var(--mint-bright);box-shadow:inset 0 1px #ffffff0f}.brand__name,.brand__tagline{display:block}.brand__name{font-size:1.06rem;font-weight:700;letter-spacing:-.02em}.brand__tagline{margin-top:2px;color:var(--muted);font-size:.73rem;letter-spacing:.015em}.header-progress{width:100%}.header-progress__copy{display:flex;justify-content:space-between;margin-bottom:9px;color:var(--muted);font-size:.73rem;font-weight:600}.header-progress__copy span:first-child{color:var(--text)}.progress-track{height:5px;overflow:hidden;border-radius:99px;background:#ffffff13}.progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#003f80,var(--mint-bright));box-shadow:0 0 16px #55adff59;transition:width .5s cubic-bezier(.2,.8,.2,1)}.ghost-button,.hint-button,.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:42px;padding:0 15px;border-radius:11px;cursor:pointer;font-size:.83rem;font-weight:650;transition:transform .16s ease,background .16s ease,border-color .16s ease}.ghost-button,.hint-button{border:1px solid var(--line-strong);background:#ffffff06}.ghost-button:hover,.hint-button:hover{border-color:#55adff59;background:var(--mint-wash)}.primary-button{border:1px solid #003f80;background:#003f80;color:#f7fbff;box-shadow:0 10px 30px #003f8052}.primary-button:hover{border-color:#075cae;background:#075cae;transform:translateY(-1px)}.reset-button{justify-self:end}.game-layout{display:grid;grid-template-columns:188px minmax(430px,1.35fr) minmax(330px,.78fr);gap:20px;padding-top:24px;align-items:start}.mode-switcher{display:grid;grid-template-columns:minmax(150px,.35fr) minmax(0,1fr);align-items:center;gap:20px;padding:18px 0 0}.mode-switcher__intro h2{margin:4px 0 0;font-size:1rem}.mode-switcher__options{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.mode-option{display:grid;min-width:0;gap:7px;padding:13px 15px;border:1px solid var(--line);border-radius:13px;background:#ffffff05;color:var(--muted);text-align:left;cursor:pointer}.mode-option:not(:disabled):hover,.mode-option--active{border-color:#55adff6b;background:var(--mint-wash)}.mode-option--active{box-shadow:inset 0 0 0 1px #55adff1a}.mode-option:disabled{cursor:not-allowed;opacity:.64}.mode-option__heading,.mode-option__meta,.mode-option__commands{display:flex;align-items:center}.mode-option__heading{justify-content:space-between;gap:10px;color:var(--text);font-size:.8rem}.mode-option__heading small{color:var(--mint);font-size:.65rem}.mode-option__description,.mode-option__meta{font-size:.64rem;line-height:1.35}.mode-option__progress{height:3px;overflow:hidden;border-radius:99px;background:#ffffff12}.mode-option__progress i{display:block;height:100%;background:var(--mint)}.mode-option__commands{flex-wrap:wrap;gap:4px;max-height:44px;overflow:hidden}.mode-option__commands code{padding:2px 5px;border-radius:4px;background:#030d1885;color:var(--faint);font-size:.55rem}.mission-rail{grid-column:1;grid-row:1}.workspace-stack{display:grid;grid-column:2;grid-row:1;min-width:0;gap:20px}.panel{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(155deg,#0c1f33f0,#071422fa);box-shadow:var(--shadow),inset 0 1px #ffffff06}.panel-bar{display:flex;align-items:center;min-height:56px;padding:0 18px;border-bottom:1px solid var(--line)}.panel-bar h2{margin:0;font-size:.78rem;font-weight:650}.eyebrow{color:var(--mint);font-size:.63rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase}.mission-rail{position:sticky;top:20px;padding:17px 9px 16px 0}.mission-rail__heading{display:grid;gap:4px;padding:0 0 18px 2px}.mission-rail__heading strong{font-size:.93rem}.mission-rail ol{padding:0;margin:0;list-style:none}.rail-step{position:relative;display:grid;grid-template-columns:30px 1fr;align-items:center;min-height:53px;gap:10px;color:var(--faint)}.rail-step__button{display:grid;grid-column:1 / -1;grid-template-columns:30px minmax(0,1fr);align-items:center;width:100%;min-height:53px;padding:0;border:0;gap:10px;background:transparent;color:inherit;text-align:left}.rail-step__button:not(:disabled){cursor:pointer}.rail-step__button:not(:disabled):hover .rail-step__copy>span:first-child,.rail-step__button:focus-visible .rail-step__copy>span:first-child{color:var(--mint-bright)}.rail-step--available{color:var(--muted)}.rail-step--available .rail-step__marker{border-color:#79bff24d}.rail-step:not(:last-child):after{position:absolute;top:39px;bottom:-8px;left:14px;width:1px;background:var(--line);content:""}.rail-step--complete:not(:last-child):after{background:#55adff4d}.rail-step__marker{position:relative;z-index:1;display:grid;width:29px;height:29px;place-items:center;border:1px solid var(--line);border-radius:9px;background:var(--bg);font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.67rem}.rail-step__marker svg{width:14px}.rail-step--complete .rail-step__marker{border-color:#55adff3d;background:var(--mint-wash);color:var(--mint)}.rail-step--current{color:var(--text)}.rail-step--current .rail-step__marker{border-color:var(--mint);background:#003f80;color:#f7fbff;box-shadow:0 0 0 4px #55adff24}.rail-step__copy{display:grid;min-width:0;gap:2px}.rail-step__copy>span{overflow:hidden;font-size:.72rem;font-weight:600;text-overflow:ellipsis;white-space:nowrap}.rail-step__copy code{color:inherit;font-size:.61rem}.terminal-card{min-height:488px;background:#071421}.terminal-bar{position:relative;justify-content:center;background:#ffffff05}.terminal-bar h2{display:inline-flex;align-items:center;gap:7px;color:var(--muted)}.terminal-bar h2 svg{width:15px}.window-dots{position:absolute;left:18px;display:flex;gap:6px}.window-dots i{display:block;width:8px;height:8px;border-radius:50%;background:#42586d}.window-dots i:first-child{background:#e67873}.window-dots i:nth-child(2){background:#d8ad62}.window-dots i:last-child{background:#5eb899}.terminal-status{position:absolute;right:18px;display:inline-flex;align-items:center;gap:6px;color:var(--faint);font-size:.63rem}.terminal-status i{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 8px #55adff99}.terminal-screen{height:378px;padding:22px 21px;overflow:auto;color:#e1edf8;font-size:clamp(.76rem,.85vw,.86rem);line-height:1.72;scrollbar-color:#263d54 transparent;cursor:text}.terminal-output{display:grid;gap:2px}.terminal-line,.terminal-form{display:flex;align-items:flex-start;min-width:0;gap:8px}.terminal-line__text{min-width:0;white-space:pre-wrap;overflow-wrap:anywhere}.terminal-line--info{color:var(--blue)}.terminal-line--success{color:var(--mint-bright)}.terminal-line--error{color:var(--coral)}.terminal-line--command{margin-top:8px;color:var(--text)}.terminal-prompt{display:inline-flex;flex:0 0 auto;align-items:baseline;gap:0;white-space:nowrap}.terminal-prompt span{color:var(--mint)}.terminal-prompt em{color:#7fc3f4;font-style:normal}.terminal-prompt b{margin:0 2px;color:#9badbf;font-weight:400}.terminal-form{position:relative;margin-top:5px;border-radius:5px}.terminal-form:focus-within{outline:1px solid rgba(166,215,255,.5);outline-offset:3px;background:#55adff06}.terminal-form input{width:100%;min-width:2rem;padding:0;border:0;outline:0;background:transparent;color:var(--text);caret-color:var(--mint);font:inherit;line-height:inherit}.terminal-form input:focus-visible{outline:none}.terminal-caret{display:none}.terminal-footer{display:flex;align-items:center;min-height:53px;gap:18px;padding:0 20px;border-top:1px solid var(--line);color:var(--faint);font-size:.63rem}.terminal-footer span{display:inline-flex;align-items:center;gap:5px}.pipeline-explanation{padding:13px 18px 16px;border-top:1px solid var(--line);background:#79bff20b;color:var(--muted);font-size:.68rem}.pipeline-explanation summary{color:var(--blue);cursor:pointer;font-weight:650}.pipeline-explanation>code{display:block;margin-top:10px;color:var(--mint-bright);overflow-wrap:anywhere}.pipeline-explanation ol{display:grid;gap:5px;margin:9px 0 0;padding-left:21px;line-height:1.4}kbd{min-width:20px;padding:2px 5px;border:1px solid var(--line-strong);border-bottom-color:#ffffff47;border-radius:5px;background:#ffffff0a;color:var(--muted);font-size:.57rem;text-align:center;box-shadow:0 1px #ffffff0d}.learning-card{position:sticky;top:20px;grid-column:3;grid-row:1;min-height:680px;padding:clamp(24px,2.5vw,37px);overflow:visible}.learning-card:before{position:absolute;top:0;right:0;width:140px;height:140px;border-radius:0 var(--radius-lg) 0 100%;background:radial-gradient(circle at top right,rgba(85,173,255,.09),transparent 70%);content:"";pointer-events:none}.lesson-kicker{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.lesson-kicker>span{color:var(--mint);font-size:.65rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.lesson-kicker code{padding:6px 9px;border:1px solid rgba(85,173,255,.16);border-radius:7px;background:var(--mint-wash);color:var(--mint-bright);font-size:.7rem}.learning-card h1{max-width:13ch;margin:0;font-size:clamp(1.65rem,2.1vw,2.25rem);line-height:1.08;letter-spacing:-.045em}.lesson-lead{margin:16px 0 22px;color:#a9bacb;font-size:.88rem;line-height:1.6}.inline-code{padding:.08em .34em;border:1px solid rgba(85,173,255,.13);border-radius:5px;background:#55adff12;color:var(--mint-bright);font-size:.88em;white-space:nowrap}.safety-callout{margin:-4px 0 20px;padding:12px 13px;border:1px solid rgba(121,191,242,.2);border-radius:10px;background:#79bff212;color:#c2daf0;font-size:.72rem;line-height:1.5}.safety-callout--warning{border-color:#ff918a3d;background:var(--coral-wash);color:#edc2bf}.safety-callout strong{display:block;margin-bottom:3px;color:var(--blue);font-size:.68rem}.safety-callout--warning strong{color:var(--coral)}.safety-callout p{margin:0}.example-block{display:grid;gap:8px;margin:0 0 17px}.example-block>span{color:var(--faint);font-size:.63rem;font-weight:650;letter-spacing:.06em;text-transform:uppercase}.example-block code{display:block;padding:14px 15px;border:1px solid var(--line);border-radius:10px;background:#061321;color:var(--text);font-size:.77rem}.example-block p{margin:-1px 1px 0;color:var(--faint);font-size:.67rem;line-height:1.45}.example-output{margin:-4px 0 0;padding:10px 15px;overflow:auto;border-left:2px solid rgba(121,191,242,.38);color:#aac0d4;font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.66rem;line-height:1.45;white-space:pre-wrap}.example-block i{margin-right:7px;color:var(--mint);font-style:normal}.guided-note{display:grid;grid-template-columns:19px 1fr;gap:11px;padding:2px 1px 18px;color:var(--muted)}.guided-note>svg{width:16px;margin-top:2px;color:var(--blue)}.guided-note strong{display:block;margin-bottom:4px;color:#ccd9e5;font-size:.7rem}.guided-note p{margin:0;font-size:.75rem;line-height:1.5}.mission-box{position:relative;padding:17px;border:1px solid rgba(85,173,255,.2);border-radius:var(--radius-md);background:linear-gradient(135deg,#55adff18,#55adff06);transition:border-color .25s ease,transform .25s ease}.mission-box--solved{border-color:#55adff7a;background:linear-gradient(135deg,#55adff29,#55adff09)}.mission-box__header{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--mint-bright);font-size:.65rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.mission-box__header>span{display:inline-flex;align-items:center;gap:8px}.mission-box__header svg{width:14px}.mission-box__header small{color:var(--faint);font-size:.58rem;font-weight:500;letter-spacing:0;text-transform:none}.mission-pulse{position:relative;width:7px;height:7px;border-radius:50%;background:var(--mint)}.mission-pulse:after{position:absolute;top:-4px;right:-4px;bottom:-4px;left:-4px;border:1px solid var(--mint);border-radius:50%;content:"";animation:pulse 2s ease-out infinite}.mission-box>p{margin:12px 0 0;color:#e7f0f8;font-size:.85rem;font-weight:520;line-height:1.55}.target-tree{margin:14px 0 0;padding:12px 13px;overflow:auto;border:1px solid var(--line);border-radius:9px;background:#030d1885;color:#afc4d7;font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.65rem;line-height:1.55}.subgoal-list{display:grid;gap:8px;padding:13px 0 0;margin:13px 0 0;border-top:1px solid var(--line);list-style:none}.subgoal-list li{display:grid;grid-template-columns:17px 1fr;align-items:start;gap:7px;color:var(--muted);font-size:.68rem;line-height:1.4}.subgoal-list li>span:first-child{display:grid;height:16px;place-items:center;color:var(--faint)}.subgoal-list svg{width:14px}.subgoal-list .is-complete{color:var(--mint-bright)}.feedback,.hint-card{margin-top:13px;border-radius:11px;font-size:.75rem;line-height:1.48}.feedback{padding:13px 14px;border:1px solid var(--line)}.feedback strong{display:block;margin-bottom:3px;font-size:.71rem}.feedback p,.hint-card p{margin:0}.feedback--success{border-color:#55adff40;background:var(--mint-wash);color:#cce7fb}.feedback--success strong{color:var(--mint-bright)}.feedback--error{border-color:#ff918a3b;background:var(--coral-wash);color:#ebc1bd}.feedback--error strong{color:var(--coral)}.feedback--info{border-color:#79bff233;background:#79bff214;color:#c2daf0}.hint-card{display:grid;grid-template-columns:18px 1fr;gap:10px;padding:13px 14px;border:1px solid rgba(240,200,111,.23);background:var(--amber-wash);color:#e3d2a6}.hint-card svg{width:16px;color:var(--amber)}.lesson-actions{margin-top:17px}.lesson-actions button{width:100%}.hint-button{color:#cad7e2}.hint-button svg{width:16px;color:var(--amber)}.tree-card{min-height:270px}.tree-bar{justify-content:space-between;padding-block:11px}.tree-bar>div{display:grid;gap:2px}.tree-bar h2{font-size:.82rem}.tree-bar code{max-width:48%;overflow:hidden;color:var(--muted);font-size:.65rem;text-overflow:ellipsis;white-space:nowrap}.tree-scroll{min-height:155px;max-height:270px;padding:18px 20px;overflow:auto}.file-tree{padding:0 0 0 20px;margin:0;list-style:none}.file-tree--root{padding-left:0}.file-tree .file-tree{position:relative}.file-tree .file-tree:before{position:absolute;top:0;bottom:10px;left:7px;width:1px;background:var(--line);content:""}.tree-node{position:relative;display:flex;align-items:center;min-height:30px;gap:8px;color:#bdcad6;font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.7rem}.tree-node svg{flex:0 0 auto;width:15px;color:var(--blue)}.tree-node small{margin-left:auto;padding:2px 6px;border-radius:5px;background:var(--mint-wash);color:var(--mint);font-family:Inter,ui-sans-serif,system-ui,sans-serif;font-size:.54rem}.is-current>.tree-node{color:var(--mint-bright)}.is-current>.tree-node:before{position:absolute;left:-8px;width:3px;height:15px;border-radius:4px;background:var(--mint);content:""}.tree-empty{color:var(--faint);font-size:.76rem}.tree-legend{display:flex;min-height:44px;align-items:center;gap:15px;padding:0 20px;border-top:1px solid var(--line);color:var(--faint);font-size:.59rem}.tree-legend span{display:inline-flex;align-items:center;gap:5px}.tree-legend svg{width:13px;color:var(--blue)}.tree-legend i{width:6px;height:12px;border-radius:5px;background:var(--mint)}.vim-workspace{display:grid;grid-column:2;grid-row:1;min-width:0;gap:20px}.vim-editor-pane,.vim-learning-panel,.vim-cheatsheet{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-lg);background:linear-gradient(155deg,#0c1f33f0,#071422fa);box-shadow:var(--shadow),inset 0 1px #ffffff06}.vim-editor-pane{min-height:560px;background:#071421}.vim-editor-bar{position:relative;display:flex;align-items:center;justify-content:center;min-height:56px;padding:0 18px;border-bottom:1px solid var(--line);background:#ffffff05}.vim-editor-bar h2{margin:0;color:var(--muted);font-size:.78rem;font-weight:650}.vim-window-dots{position:absolute;left:18px;display:flex;gap:6px}.vim-window-dots i{display:block;width:8px;height:8px;border-radius:50%;background:#42586d}.vim-window-dots i:first-child{background:#003f80}.vim-window-dots i:nth-child(2){background:#2778b9}.vim-window-dots i:last-child{background:#78b9ec}.vim-editor-file{position:absolute;right:18px;max-width:34%;overflow:hidden;color:var(--faint);font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.63rem;text-overflow:ellipsis;white-space:nowrap}.vim-editor-modified{color:var(--amber)}.vim-editor-surface{min-height:430px;max-height:560px;padding:18px 0;overflow:auto;outline:none;cursor:text;scrollbar-color:#263d54 transparent}.vim-editor-surface:focus-visible{box-shadow:inset 0 0 0 2px #55adff8c}.vim-editor-lines{display:grid;min-width:max-content}.vim-editor-line{display:grid;grid-template-columns:42px minmax(12rem,1fr);min-height:1.72em;color:#e1edf8;font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:clamp(.76rem,.85vw,.86rem);line-height:1.72}.vim-editor-line--active{background:#003f8029}.vim-editor-gutter{padding-right:12px;color:#607a94;text-align:right;-webkit-user-select:none;user-select:none}.vim-editor-line--active .vim-editor-gutter{color:var(--mint)}.vim-editor-text{padding-right:24px;color:inherit;font:inherit;white-space:pre}.vim-editor-cursor{background:var(--mint-bright);color:#03111f;box-shadow:0 0 0 1px #a6d7ff59}.vim-command-line{display:flex;min-height:32px;align-items:center;padding:0 16px;border-top:1px solid var(--line);background:#003f8033;color:var(--text)}.vim-command-line code{font-size:.76rem}.vim-command-cursor{width:7px;height:1.05em;margin-left:1px;background:var(--mint-bright)}.vim-status-line{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;min-height:38px;gap:10px;padding:0 14px;border-top:1px solid var(--line);background:#0b2035;color:var(--faint);font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.62rem}.vim-mode{padding:3px 7px;border-radius:5px;background:#003f80;color:#f7fbff;letter-spacing:.06em}.vim-mode--insert{background:#075cae}.vim-mode--command{background:#315f91}.vim-mode--search{background:#2473ac}.vim-mode--visual{background:#466f9c}.vim-mode--replace{background:#284e77}.vim-status-message{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.vim-cursor-position{white-space:nowrap}.vim-editor-help{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:0;padding:9px 14px 11px;border-top:1px solid var(--line);color:var(--faint);font-size:.62rem}.vim-focus-state{display:inline-flex;align-items:center;gap:5px;padding:0;border:0;background:transparent;color:var(--amber);cursor:pointer;font:inherit;font-weight:700;white-space:nowrap}.vim-focus-state i{width:7px;height:7px;border-radius:50%;background:currentColor;box-shadow:0 0 0 3px #f0c86f1a}.vim-focus-state--active{color:var(--mint-bright);cursor:default}.vim-focus-state--active i{box-shadow:0 0 0 3px #55adff21}.vim-editor-closed{display:grid;min-height:500px;place-content:center;justify-items:center;padding:28px;color:var(--muted);text-align:center}.vim-editor-closed strong{color:var(--text);font-size:1.1rem}.vim-editor-closed p{margin:8px 0 20px}.vim-reopen-button,.vim-hint-button,.vim-continue-button{display:inline-flex;min-height:42px;align-items:center;justify-content:center;gap:8px;padding:0 15px;border-radius:11px;cursor:pointer;font-size:.78rem;font-weight:650}.vim-reopen-button,.vim-continue-button{border:1px solid #003f80;background:#003f80;color:#f7fbff}.vim-learning-panel{position:sticky;top:20px;grid-column:3;grid-row:1;min-height:680px;padding:clamp(24px,2.5vw,37px);overflow:visible}.vim-learning-header,.vim-mission-header,.vim-hints-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.vim-level-kicker{color:var(--mint);font-size:.65rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.vim-key-sequence{padding:5px 8px;border-color:#55adff47;background:var(--mint-wash);color:var(--mint-bright);font-size:.66rem}.vim-learning-panel h1{max-width:14ch;margin:17px 0 0;font-size:clamp(1.65rem,2.1vw,2.25rem);line-height:1.08;letter-spacing:-.045em}.vim-learning-explanation{margin:16px 0 22px;color:#a9bacb;font-size:.86rem;line-height:1.6}.vim-inline-code{padding:.08em .34em;border:1px solid rgba(85,173,255,.16);border-radius:5px;background:#55adff12;color:var(--mint-bright);font-size:.88em;white-space:nowrap}.vim-mission{padding:17px;border:1px solid rgba(85,173,255,.22);border-radius:var(--radius-md);background:linear-gradient(135deg,#55adff1a,#55adff06)}.vim-mission--solved{border-color:#55adff80;background:linear-gradient(135deg,#55adff2b,#55adff0a)}.vim-mission-header{color:var(--mint-bright);font-size:.65rem;letter-spacing:.05em;text-transform:uppercase}.vim-mission-header strong{display:inline-flex;align-items:center;gap:7px}.vim-mission-header svg,.vim-objective-list svg,.vim-hint svg,.vim-learning-actions svg{width:15px}.vim-mission-header small{color:var(--faint);font-weight:500;letter-spacing:0;text-transform:none}.vim-mission-marker{width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px #55adff1a}.vim-mission>p{margin:12px 0 0;color:#e7f0f8;font-size:.83rem;line-height:1.55}.vim-objective-list{display:grid;gap:7px;padding:12px 0 0;margin:13px 0 0;border-top:1px solid var(--line);list-style:none}.vim-objective-list li{display:grid;grid-template-columns:16px 1fr;align-items:start;gap:7px;color:var(--muted);font-size:.67rem;line-height:1.4}.vim-objective--complete{color:var(--mint-bright)!important}.vim-feedback{margin-top:13px;padding:12px 13px;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:.72rem;line-height:1.45}.vim-feedback strong,.vim-feedback p{margin:0}.vim-feedback--success{border-color:#55adff47;background:var(--mint-wash);color:#cce7fb}.vim-feedback--error{border-color:#ff918a3d;background:var(--coral-wash);color:#ebc1bd}.vim-hints{margin-top:13px;padding:13px;border:1px solid rgba(240,200,111,.22);border-radius:11px;background:var(--amber-wash)}.vim-hints-header{color:var(--amber);font-size:.67rem}.vim-hints ol{display:grid;gap:10px;padding:0;margin:11px 0 0;list-style:none}.vim-hint{display:grid;grid-template-columns:17px 1fr;gap:9px;color:#e3d2a6;font-size:.68rem}.vim-hint p{margin:2px 0 0;line-height:1.45}.vim-learning-actions{margin-top:16px}.vim-learning-actions button{width:100%}.vim-hint-button{border:1px solid var(--line-strong);background:#ffffff06;color:#cad7e2}.vim-hint-button:disabled{cursor:not-allowed;opacity:.55}.vim-cheatsheet{padding:16px 18px}.vim-cheatsheet h2{margin:0 0 11px;font-size:.76rem}.vim-cheatsheet__note{margin:-3px 0 13px;color:var(--muted);font-size:.66rem;line-height:1.5}.vim-cheatsheet dl{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:0}.vim-cheatsheet div{padding:8px;border:1px solid var(--line);border-radius:8px;background:#ffffff05}.vim-cheatsheet dt{color:var(--mint-bright);font-family:SFMono-Regular,Cascadia Code,Consolas,monospace;font-size:.66rem}.vim-cheatsheet dd{margin:3px 0 0;color:var(--faint);font-size:.59rem;line-height:1.35}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:grid;padding:24px;place-items:center;background:#020912cc;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);animation:fade-in .25s ease}.fatal-state{display:grid;min-height:100vh;padding:24px;place-content:center;justify-items:center;gap:18px;text-align:center}.fatal-state h1{max-width:24ch;margin:0;font-size:clamp(1.5rem,5vw,2.4rem)}.completion-modal{width:min(560px,100%);padding:clamp(28px,5vw,48px);border:1px solid rgba(85,173,255,.25);border-radius:24px;background:radial-gradient(circle at 50% 0,rgba(0,63,128,.42),transparent 15rem),var(--surface);box-shadow:0 40px 100px #00000080;text-align:center;animation:rise-in .38s cubic-bezier(.2,.8,.2,1)}.completion-badge{display:grid;width:58px;height:58px;margin:0 auto 18px;place-items:center;border:1px solid rgba(85,173,255,.28);border-radius:18px;background:var(--mint-wash);color:var(--mint-bright)}.completion-badge svg{width:26px;height:26px}.completion-modal h2{margin:10px 0 14px;font-size:clamp(1.8rem,5vw,2.6rem);letter-spacing:-.05em}.completion-modal>p{max-width:46ch;margin:0 auto 23px;color:var(--muted);font-size:.9rem;line-height:1.6}.command-confetti{display:flex;flex-wrap:wrap;justify-content:center;gap:7px;margin-bottom:27px}.command-confetti code{padding:6px 9px;border:1px solid var(--line);border-radius:7px;background:#071421;color:#becfe0;font-size:.66rem}.completion-actions{display:flex;justify-content:center;gap:10px}@keyframes pulse{0%{opacity:.7;transform:scale(.6)}80%,to{opacity:0;transform:scale(1.6)}}@keyframes fade-in{0%{opacity:0}}@keyframes rise-in{0%{opacity:0;transform:translateY(15px) scale(.98)}}@media(max-width:1180px){.game-layout{grid-template-columns:minmax(430px,1.25fr) minmax(320px,.8fr)}.mission-rail{position:static;grid-column:1 / -1;grid-row:1;padding:0;overflow-x:auto}.mission-rail__heading{display:none}.mission-rail ol{display:flex;min-width:max-content}.rail-step{grid-template-columns:30px auto;min-width:135px;padding-right:15px}.rail-step:not(:last-child):after{top:26px;right:-2px;bottom:auto;left:30px;width:calc(100% - 29px);height:1px}.learning-card,.vim-learning-panel{top:12px;grid-column:2;grid-row:2}.workspace-stack,.vim-workspace{grid-column:1;grid-row:2}}@media(max-width:820px){.app-shell{padding:0 16px 24px}.app-header{grid-template-columns:1fr auto;min-height:auto;padding:17px 0;gap:16px}.brand__tagline,.reset-button span{display:none}.header-progress{grid-column:1 / -1;grid-row:2}.reset-button{width:42px;padding:0}.game-layout{grid-template-columns:minmax(0,1fr);padding-top:17px}.mode-switcher{grid-template-columns:1fr;gap:10px}.mode-switcher__intro{display:none}.mission-rail,.workspace-stack,.learning-card,.vim-workspace,.vim-learning-panel{grid-column:1}.learning-card,.vim-learning-panel{position:static;grid-row:2;min-height:0}.workspace-stack,.vim-workspace{grid-row:3}.vim-cheatsheet dl{grid-template-columns:repeat(2,minmax(0,1fr))}.terminal-card{min-height:460px}.terminal-screen{height:350px}}@media(max-width:540px){.app-shell{padding-inline:10px}.brand__mark{width:38px;height:38px}.mode-switcher__options{grid-template-columns:1fr}.mode-option__commands{display:none}.panel{border-radius:16px}.learning-card{padding:23px 19px}.terminal-status{display:none}.terminal-screen{padding-inline:14px;font-size:.7rem}.vim-editor-line{font-size:.7rem}.vim-status-line{grid-template-columns:auto minmax(0,1fr)}.vim-cursor-position{display:none}.terminal-footer{justify-content:space-between;gap:5px;padding-inline:13px}.terminal-footer span:nth-child(2){display:none}.tree-legend span:nth-child(2){display:none}.completion-actions{flex-direction:column}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}