:root{--ink:#17231e;--paper:#f4eddb;--cream:#fffaf0;--sun:#f6bf37;--red:#d94a32;--green:#287a55;--blue:#28679b;--muted:#706b5e;--shadow:6px 6px 0 var(--ink)}
*{box-sizing:border-box}html{background:var(--paper);scroll-behavior:smooth}body{margin:0;min-height:100vh;color:var(--ink);font-family:"Courier New",Courier,monospace;background:radial-gradient(circle at 8% 8%,#ffd76355 0 10%,transparent 11%),linear-gradient(#0000 31px,#23352b10 32px),var(--paper);background-size:auto,100% 32px}button,input,textarea,select{font:inherit}a{color:inherit}.shell{width:min(1180px,calc(100vw - 36px));margin:auto;padding:24px 0 64px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:30px}.brand,.back,.source-link{text-decoration:none;border-bottom:2px solid;font-weight:700}.brand{letter-spacing:.08em}.kicker{display:inline-block;border:2px solid;background:var(--sun);padding:6px 9px;transform:rotate(-1deg);margin-bottom:18px}h1,h2,h3{font-family:Georgia,"Times New Roman",serif;margin-top:0}h1{font-size:clamp(2.8rem,7vw,6.5rem);line-height:.9;letter-spacing:-.045em;margin-bottom:22px}.lead{font-size:clamp(1rem,2vw,1.25rem);line-height:1.6;max-width:820px}.card,.step,.sheet-card{background:var(--cream);border:2px solid;padding:20px;box-shadow:var(--shadow)}.overview{display:grid;grid-template-columns:1fr 2fr;gap:20px;margin:36px 0}.progress{height:14px;border:2px solid;background:#fff;margin:13px 0}.progress>i{display:block;height:100%;background:var(--green)}.sheet-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.sheet-card{display:flex;min-height:190px;flex-direction:column;justify-content:space-between;text-decoration:none;transition:.15s}.sheet-card:hover,.sheet-card:focus-visible{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--ink);outline:3px solid var(--blue);outline-offset:3px}.sheet-card b{font:700 3rem Georgia,serif}.sheet-card small{color:var(--muted)}.task-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.task-link{display:flex;justify-content:space-between;gap:16px;background:var(--cream);border:2px solid;padding:16px;text-decoration:none}.task-link:hover,.task-link:focus-visible{background:#fff1c9;outline:3px solid var(--blue);outline-offset:2px}.task-link[data-state="sitzt"]{background:#d8f0df}.task-link[data-state="wackelt"]{background:#ffe1d3}.task-head{display:grid;grid-template-columns:1fr auto;align-items:end;gap:20px;border-bottom:3px solid;padding-bottom:20px}.task-head h1{font-size:clamp(2.6rem,6vw,5.2rem);margin:0}.counter{font:700 1.7rem Georgia,serif}.mission{display:grid;grid-template-columns:.85fr 1.4fr;gap:20px;margin:24px 0}.brief{background:var(--sun);border:2px solid;padding:20px;box-shadow:var(--shadow)}.source-core,.code{white-space:pre-wrap;background:#17231e;color:#f2f5df;border:2px solid #08100c;padding:18px;overflow:auto;line-height:1.5}.step{margin:18px 0}.step[hidden],[hidden]{display:none!important}.prompt{font-size:1.05rem;line-height:1.6}.choices,.actions,.state-row{display:flex;flex-wrap:wrap;gap:10px}.choice,.action,.state-btn{border:2px solid;background:#fff;padding:11px 14px;box-shadow:3px 3px 0 var(--ink);cursor:pointer}.choice:hover,.action:hover,.state-btn:hover{transform:translateY(-2px)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.action.primary{background:var(--red);color:#fff}.feedback{margin-top:14px;padding:14px;border:2px dashed;line-height:1.5}.feedback.good{background:#d8f0df}.feedback.try{background:#ffe8bd}.hint{border-left:6px solid var(--blue);background:#e7f0f7;padding:14px;margin-top:12px}.answer{width:100%;min-height:100px;border:2px solid;padding:12px;background:#fffdf7}.nav-bottom{display:flex;justify-content:space-between;gap:12px;margin-top:28px}.nav-bottom a{border:2px solid;background:var(--cream);padding:11px;text-decoration:none}.tiny{font-size:.78rem;color:var(--muted);line-height:1.5}.lab-box{background:#e8f1e9;border:2px solid;padding:16px}.command{display:block;background:#17231e;color:#fff;padding:12px;overflow:auto}.status-big{font:700 3rem Georgia,serif}@media(max-width:850px){.overview,.mission{grid-template-columns:1fr}.sheet-grid{grid-template-columns:repeat(2,1fr)}.task-head{grid-template-columns:1fr}.shell{width:min(100% - 24px,1180px)}}@media(max-width:560px){.sheet-grid,.task-grid{grid-template-columns:1fr}.topbar,.nav-bottom{align-items:flex-start;flex-direction:column}h1{font-size:2.8rem}}