@font-face{font-family:Space Grotesk;src:url('/fonts/space-grotesk.woff2') format('woff2');font-weight:300 700;font-display:swap}
@font-face{font-family:IBM Plex Mono;src:url('/fonts/ibm-plex-mono.woff2') format('woff2');font-weight:400;font-display:swap}
:root{color-scheme:dark;--bg:#121715;--surface:#151b18;--text:#f1efe8;--muted:#aebbbd;--border:#3a4540;--orange:#ff7858;--lime:#c7d99a;--mono:'IBM Plex Mono',ui-monospace,monospace;--sans:'Space Grotesk',system-ui,sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--mono);font-size:16px;line-height:1.6}button,input{font:inherit}a{color:var(--lime);text-underline-offset:5px}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--lime);outline-offset:5px}button:disabled{opacity:.55}.page-shell{width:min(1400px,calc(100% - 9vw));margin:auto}.challenge-header{display:flex;align-items:center;justify-content:space-between;gap:40px;padding:24px 0 0}.wordmark{font:600 36px/1.3 var(--mono);letter-spacing:1px;color:var(--text);text-decoration:none}.challenge-header nav{display:flex;gap:40px;align-items:center}.challenge-header nav a{color:#cad3d2;text-decoration:none;font-size:16px;white-space:nowrap}.challenge-header nav a[aria-current=page]{color:var(--orange);border-bottom:2px solid var(--orange);padding-bottom:5px}.challenge-header nav a:hover{color:var(--orange)}.challenge-main{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:60px;margin-top:57px;margin-bottom:70px;min-height:747px}.challenge-intro{padding-top:62px}.challenge-intro h1{font:700 clamp(50px,5.75vw,88px)/1.05 var(--sans);letter-spacing:-3.6px;margin:0 0 22px;white-space:nowrap}.lead{font-size:28px;line-height:1.45;letter-spacing:-.4px;margin:0 0 12px}.challenge-date{font-size:18px;line-height:1.65;color:var(--muted);margin:0}.challenge-help{font-size:22px;line-height:1.65;max-width:600px;margin:40px 0 22px}.archive-link{font-size:20px}.scenario-context{font-size:13px;line-height:1.8;color:var(--muted);max-width:560px;margin:28px 0 0}.local-streak{color:var(--lime);font-size:13px;margin-top:22px}.storage-note,.date-note{font-size:13px;line-height:1.8;color:var(--muted);margin:20px 0 0}.terminal{min-height:276px;border:1px solid var(--border);border-radius:7px;overflow:hidden;background:#121715}.terminal-header{position:relative;height:52px;background:#181e1a;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:center;padding:0 80px}.terminal-header p{font-size:15px;line-height:1.5;margin:0;color:#c1c9c6;text-align:center}.window-dots{position:absolute;left:20px;display:flex;gap:10px}.window-dots i{height:17px;width:17px;border-radius:50%;background:#ff6059}.window-dots i:nth-child(2){background:#ffcc45}.window-dots i:nth-child(3){background:#45d45b}.terminal-output{padding:24px 22px 30px;overflow-wrap:anywhere;font-size:18px;line-height:1.7}.terminal-output p{margin:0;white-space:pre-wrap}.terminal-output .command+.error{margin-top:17px}.terminal-output .command+.command{margin-top:10px}.terminal-output .error{color:var(--orange);font-weight:600}.challenge-form{margin-top:35px}.challenge-form fieldset{border:0;padding:0;margin:0;min-width:0}.challenge-form legend{font-size:23px;line-height:1.5;font-weight:600;padding:0;margin-bottom:15px;letter-spacing:-.4px;width:100%}.options{display:grid;gap:12px}.option{position:relative;display:flex;align-items:center;gap:25px;min-height:62px;padding:14px 22px;border:1px solid var(--border);border-radius:6px;font-size:18px;line-height:1.55;background:#151b18;cursor:pointer;overflow-wrap:anywhere}.option:has(input:checked){border-color:var(--lime);box-shadow:inset 0 0 0 1px #c7d99a33;background:#1b211b}.option input{width:21px;height:21px;flex-shrink:0;margin:0;accent-color:var(--lime)}.option code{font:inherit;white-space:pre-wrap}.option.tried{opacity:.55;border-color:#765043;cursor:default}.option.correct{border-color:var(--lime);background:#20291c;opacity:1}.option:has(input:focus-visible){outline:2px solid var(--lime);outline-offset:4px}.attempt-controls{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:29px}.attempt-count{font-size:16px;color:var(--muted);margin:0}.run-fix,.result-button{display:inline-flex;align-items:center;justify-content:center;min-height:62px;border-radius:6px;border:1px solid var(--orange);padding:15px 35px;background:var(--orange);color:#171b15;font-weight:600;font-size:18px;white-space:nowrap}.run-fix{min-width:230px}.run-fix:hover:not(:disabled){background:#ff8b70}.feedback{margin:18px 0 0;color:#f7b197;font-size:14px;line-height:1.8}.feedback:empty{display:none}.result-panel{border-top:1px solid var(--border);margin-top:30px;padding-top:26px}.result-panel h2{font:600 28px/1.3 var(--sans);margin:0 0 14px;letter-spacing:-.7px}.result-panel p{font-size:14px;line-height:1.9;margin:0 0 16px;color:#c6cfca}.answer-command{display:block;border-left:2px solid var(--lime);padding:10px 16px;font-size:16px;margin-bottom:18px;overflow-wrap:anywhere}.result-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.result-button{min-height:44px;padding:10px 17px;font-size:13px}.result-button.secondary{background:transparent;border-color:var(--border);color:var(--text)}.source-links{font-size:12px;display:flex;gap:12px;flex-wrap:wrap}.share-message{font-size:12px;color:var(--muted);min-height:1.6em}.challenge-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;border-top:1px solid var(--border);padding:27px 0 40px;font-size:14px}.challenge-footer p{margin:0}.challenge-footer a{white-space:nowrap}.practice-index{max-width:1120px;margin:92px auto 90px}.practice-index h1{font:700 clamp(48px,5.5vw,78px)/1.08 var(--sans);letter-spacing:-3px;margin:0 0 28px}.index-intro{font-size:20px;line-height:1.8;max-width:820px;color:#c6cfca;margin-bottom:60px}.practice-list{list-style:none;padding:0;margin:0;border-top:1px solid var(--border)}.practice-list li{display:grid;grid-template-columns:55px 1fr 100px;gap:24px;align-items:start;padding:27px 0;border-bottom:1px solid var(--border)}.scenario-number{font-size:13px;color:var(--muted);padding-top:6px}.practice-list h2{font:600 25px/1.35 var(--sans);letter-spacing:-.5px;margin:0 0 8px}.practice-list h2 a{color:var(--text);text-decoration:none}.practice-list h2 a:hover{color:var(--orange)}.practice-list p{font-size:13px;line-height:1.8;color:var(--muted);margin:0}.scenario-category{color:var(--lime);font-size:12px;text-align:right;padding-top:7px}.past-days{margin-top:60px}.past-days h2,.reference h2{font:600 30px/1.3 var(--sans);letter-spacing:-.5px}.past-links{display:flex;gap:20px;flex-wrap:wrap;font-size:14px}.reference{max-width:900px;margin:0 auto 75px;border-top:1px solid var(--border);padding-top:30px}.reference summary{cursor:pointer;font-size:19px;color:var(--lime)}.reference p{font-size:15px;line-height:1.9;color:#c6cfca}.reference code{color:var(--text);overflow-wrap:anywhere}.share-dialog{width:min(560px,calc(100% - 32px));border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);padding:26px}.share-dialog::backdrop{background:#050907b8}.share-dialog h2{font:600 26px var(--sans);margin:0 0 16px}.share-dialog textarea{width:100%;min-height:145px;resize:vertical;background:var(--bg);color:var(--text);border:1px solid var(--border);padding:14px;font:14px/1.7 var(--mono)}.share-dialog button{float:right;margin-top:17px}.js-only[hidden],[hidden]{display:none!important}.noscript-note{border:1px solid var(--border);padding:15px;font-size:13px}
@media(min-width:1600px){.challenge-main{gap:80px}.challenge-intro h1{font-size:88px}}
@media(max-width:1250px){.challenge-header nav{gap:25px}.challenge-main{gap:35px;margin-top:55px}.challenge-intro h1{font-size:5.3vw;letter-spacing:-2.5px}.lead{font-size:22px}.challenge-date{font-size:14px}.challenge-help{font-size:16px}.archive-link{font-size:16px}.terminal-output{font-size:16px}.terminal-header p{font-size:13px}.challenge-form legend{font-size:19px}.option{font-size:16px;gap:17px;padding:13px 17px}.run-fix{min-width:185px;font-size:16px;padding:14px 22px}.attempt-count{font-size:13px}}
@media(max-width:900px){.page-shell{width:calc(100% - 48px)}.challenge-header{align-items:flex-start;gap:24px;flex-wrap:wrap}.wordmark{font-size:29px}.challenge-header nav{gap:24px}.challenge-header nav a{font-size:13px}.challenge-main{grid-template-columns:1fr;gap:40px;margin-top:48px;margin-bottom:55px;min-height:0}.challenge-intro{padding-top:0}.challenge-intro h1{font-size:64px;white-space:normal;letter-spacing:-3px;margin-bottom:22px}.lead{font-size:22px;max-width:650px}.challenge-help{margin-top:24px;margin-bottom:15px;max-width:650px}.scenario-context{max-width:650px;margin-top:20px}.terminal{min-height:240px}.terminal-output{font-size:18px}.challenge-form legend{font-size:22px}.option{font-size:17px}.attempt-count{font-size:15px}.run-fix{min-width:220px;font-size:17px}.practice-index{margin-top:55px}.practice-index h1{font-size:60px}.practice-list li{grid-template-columns:34px 1fr;gap:18px}.scenario-category{grid-column:2;text-align:left;padding-top:0;margin-top:-10px}.challenge-footer{font-size:12px}}
@media(max-width:540px){.page-shell{width:calc(100% - 36px)}.challenge-header{padding-top:22px;gap:19px}.wordmark{font-size:28px}.challenge-header nav{width:100%;gap:20px;justify-content:space-between}.challenge-header nav a{font-size:11px}.challenge-main{margin-top:36px;gap:30px}.challenge-intro h1{font-size:clamp(39px,11vw,58px);letter-spacing:-2.5px;line-height:1.12;margin-bottom:19px}.lead{font-size:18px;line-height:1.6}.challenge-date{font-size:11px}.challenge-help{font-size:13px;line-height:1.9;margin-top:22px}.archive-link{font-size:14px}.scenario-context{font-size:11px;line-height:1.9}.terminal{min-height:225px}.terminal-header{height:44px;padding:0 65px}.terminal-header p{font-size:10px}.window-dots{left:14px;gap:7px}.window-dots i{width:10px;height:10px}.terminal-output{font-size:13px;line-height:1.8;padding:21px 17px}.challenge-form{margin-top:25px}.challenge-form legend{font-size:17px;line-height:1.6;margin-bottom:14px;letter-spacing:-.2px}.option{font-size:13px;gap:13px;min-height:56px;padding:12px 14px}.option input{width:18px;height:18px}.options{gap:10px}.attempt-controls{gap:12px;margin-top:23px}.attempt-count{font-size:11px}.run-fix{min-width:150px;min-height:51px;padding:13px 16px;font-size:13px}.result-panel h2{font-size:25px}.result-panel p{font-size:12px}.answer-command{font-size:13px}.challenge-footer{font-size:10px;gap:17px;align-items:flex-start;line-height:1.8;padding-top:22px}.challenge-footer a{white-space:normal;text-align:right}.practice-index h1{font-size:44px;letter-spacing:-2px}.index-intro{font-size:15px;margin-bottom:36px}.practice-list li{grid-template-columns:26px 1fr;gap:12px;padding:23px 0}.practice-list h2{font-size:21px}.practice-list p{font-size:11px}.scenario-number{font-size:11px}.scenario-category{font-size:10px}.reference summary{font-size:16px}.reference p{font-size:12px}.past-days h2{font-size:25px}.past-links{font-size:12px;gap:16px}.result-actions{gap:10px}.result-button{font-size:12px}}
.option input{appearance:none;-webkit-appearance:none;display:grid;place-items:center;border:2px solid #d7dfdc;border-radius:50%;background:transparent;accent-color:auto}
.option input::before{content:'';width:11px;height:11px;border-radius:50%;background:var(--lime);transform:scale(0)}
.option input:checked{border-color:var(--lime)}
.option input:checked::before{transform:scale(1)}
@media(max-width:540px){.option input::before{width:8px;height:8px}}
@media(max-width:360px){.challenge-header nav{gap:8px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}