/* System fallbacks keep the activity fully usable without external fonts. */
fieldset.options{padding:0;border:0;min-width:0}.matching{margin-top:20px}.option{overflow-wrap:anywhere}.question-card h2{overflow-wrap:anywhere}.status-strip{line-height:1.5}
:root{--navy:#111d32;--muted:#56677c;--blue:#2558de;--teal:#137c75;--paper:#f3f6fb;--line:#d8e1ed;--accent:#2558de;--soft:#edf2ff;--orange:#f2b15b;font-family:'DM Sans',Arial,sans-serif;color:var(--navy);background:var(--paper);font-size:16px}*{box-sizing:border-box}body{margin:0}h1,h2,h3,.wordmark{font-family:'Space Grotesk',Arial,sans-serif;letter-spacing:-.035em}h1{font-size:clamp(2rem,4vw,3.4rem);line-height:1.08;margin:12px 0 20px}h2{font-size:1.8rem;margin:0 0 16px}h3{font-size:1.25rem;margin:0 0 12px}p{line-height:1.6}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #ed9c25;outline-offset:4px}header{height:80px;background:var(--navy);color:white;display:flex;justify-content:space-between;align-items:center;padding:0 4vw;gap:20px}.wordmark{font-size:1.25rem;font-weight:700;text-decoration:none;color:white;white-space:nowrap}.wordmark span{color:#64d8d0;margin:0 4px}.header-meta,.eyebrow{font-size:.875rem;letter-spacing:.12em;font-weight:700}.header-meta{color:#b6c6de}main{max-width:1200px;margin:auto;padding:44px 28px}.intro{display:flex;justify-content:space-between;gap:32px;align-items:start}.intro p{max-width:630px;font-size:1.08rem}.brief{border-left:3px solid var(--orange);padding:4px 0 4px 20px;max-width:300px;margin-top:22px}.brief p{font-size:.95rem;margin:6px 0}.eyebrow{color:var(--accent)}.missions{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:28px}.mission-card{background:white;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;flex-direction:column}.mission-image{height:190px;width:100%;object-fit:cover;background:#dfe7f4}.mission-card .content{padding:26px}.mission-card p{color:var(--muted);min-height:54px}.mission-card h2{font-size:1.75rem;margin-top:12px}.meta-row{display:flex;flex-wrap:wrap;gap:10px;font-size:.875rem;color:var(--muted);margin:20px 0}.tag{padding:6px 10px;background:var(--paper);border:1px solid var(--line);border-radius:5px}.primary,.secondary{display:inline-flex;gap:10px;justify-content:center;align-items:center;border:0;border-radius:8px;font-weight:700;padding:14px 22px;min-height:48px;text-decoration:none}.primary{background:var(--accent);color:white}.primary:hover{filter:brightness(.9)}.secondary{border:1px solid var(--line);background:white;color:var(--navy)}.mission-card .primary{width:100%}.workspace{max-width:1440px;margin:auto;display:grid;grid-template-columns:285px 1fr;min-height:calc(100vh - 136px)}.sidebar{background:#e7edf6;border-right:1px solid var(--line);padding:30px 22px}.sidebar h2{font-size:1.35rem;margin-top:16px}.sidebar p{font-size:.9rem;color:var(--muted)}.back{color:var(--muted);text-decoration:none;font-size:.9rem}.room-list{display:grid;gap:10px;margin-top:26px}.room-nav{text-align:left;border:1px solid transparent;background:transparent;border-radius:8px;padding:13px 12px;color:var(--muted);display:flex;gap:12px;align-items:center}.room-nav.active{background:white;border-color:var(--line);color:var(--navy)}.room-nav strong{display:block;font-size:.94rem}.room-nav small{display:block;margin-top:4px;font-size:.875rem}.room-number{font-family:monospace;font-size:1.1rem}.code-wallet{margin-top:30px;padding-top:24px;border-top:1px solid #c9d4e4}.digits{display:flex;gap:8px;margin:14px 0}.digit{width:45px;height:52px;display:grid;place-items:center;background:var(--navy);color:#70ded5;border-radius:7px;font:700 1.35rem 'Space Grotesk',sans-serif}.progress-label{display:flex;justify-content:space-between;font-size:.875rem;margin:25px 0 8px}progress{width:100%;height:8px;accent-color:var(--accent)}.workspace main{width:100%;max-width:930px;padding:36px}.case-top{display:flex;justify-content:space-between;gap:20px;align-items:start}.case-top h1{font-size:2.3rem}.case-note{color:var(--muted);max-width:640px;margin:0 0 22px}.question-card{background:white;border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:0 8px 24px #111d3205}.question-index{font-size:.875rem;color:var(--muted);display:flex;justify-content:space-between;gap:12px;margin-bottom:14px}.question-card h2{font-size:1.6rem;line-height:1.25}.evidence{margin:20px 0;padding:18px;background:var(--paper);border-left:3px solid var(--accent);line-height:1.65}.question-image{max-height:285px;max-width:100%;width:100%;object-fit:contain;background:#eef1f5;border-radius:8px}.caption{font-size:.875rem;color:var(--muted);margin:8px 0 20px}.options{display:grid;gap:10px;margin:22px 0}.option{border:1.5px solid var(--line);border-radius:9px;display:flex;align-items:flex-start;gap:12px;padding:14px 16px;line-height:1.5;cursor:pointer}.option:has(input:checked){border-color:var(--accent);background:var(--soft)}.option input{margin:5px 0 0;accent-color:var(--accent);width:18px;height:18px;flex-shrink:0}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;align-items:center}.feedback{margin-top:20px;padding:16px 18px;border-radius:8px;line-height:1.6}.feedback.good{color:#14593d;background:#eaf7ef;border:1px solid #a9d6b8}.feedback.bad{color:#754218;background:#fff4e7;border:1px solid #efd0a5}.hint{background:#eef3ff;color:#254577;padding:14px 18px;border-radius:8px;line-height:1.6;margin-top:16px}.textbutton{border:0;background:none;color:var(--accent);text-decoration:underline;font-size:.9rem;padding:6px}.matchrow{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:center;border-top:1px solid var(--line);padding:16px 0;line-height:1.5}.matchrow select,input.code{width:100%;padding:12px;border:1px solid #a8b7cb;border-radius:7px;background:white;color:var(--navy)}.sequence{display:grid;gap:10px;list-style:none;padding:0;counter-reset:step}.sequence li{display:flex;gap:12px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:12px;line-height:1.5}.sequence .step{flex:1}.sequence button{border:1px solid var(--line);background:white;border-radius:5px;min-width:38px;min-height:38px;font-weight:700}.order-number{font:700 1.1rem monospace;color:var(--accent)}.unlock{max-width:650px;margin:auto;text-align:center;background:white;border:1px solid var(--line);border-radius:14px;padding:38px}.big-digit{font:700 4.5rem 'Space Grotesk',sans-serif;color:var(--accent);margin:12px 0}.unlock p{color:var(--muted)}.complete-seal{width:82px;height:82px;background:#dff5ea;border:2px solid #50a982;color:#176040;display:grid;place-items:center;border-radius:50%;font-size:2.5rem;margin:0 auto 20px}.completion-details{text-align:left;border:1px solid var(--line);border-radius:8px;margin:24px 0;padding:20px}.completion-details p{margin:6px 0}.status-strip{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;background:white;border:1px solid var(--line);padding:12px 16px;margin-bottom:22px;border-radius:8px;font-size:.9rem}footer{padding:20px 28px;text-align:center;color:var(--muted);font-size:.875rem}dialog{max-width:680px;width:calc(100% - 30px);border:1px solid var(--line);border-radius:14px;padding:28px;color:var(--navy)}dialog::backdrop{background:#111d3299}dialog p{font-size:.9rem}dialog a{color:var(--accent)}.skip{position:absolute;left:16px;top:-100px;background:white;padding:10px;z-index:20}.skip:focus{top:10px}.code{max-width:240px;letter-spacing:.3em;text-align:center;font-size:1.4rem!important}.mobile-progress{display:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@media(max-width:800px){header{height:auto;min-height:72px;padding:20px;flex-wrap:wrap}.header-meta{font-size:.75rem}.intro{display:block}.brief{max-width:none;margin-top:0}.missions{grid-template-columns:1fr}.workspace{grid-template-columns:1fr}.sidebar{padding:18px 22px;border-right:0;border-bottom:1px solid var(--line)}.sidebar h2,.sidebar>p,.room-list,.code-wallet{display:none}.progress-label{margin-top:14px}.workspace main{padding:24px 16px}.question-card{padding:20px}.matchrow{grid-template-columns:1fr}.case-top h1{font-size:1.9rem}.unlock{padding:24px}.intro h1{font-size:2.5rem}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}@media print{header,.sidebar,footer,.actions{display:none!important}.workspace{display:block}.unlock{border:0}.completion-details{border:1px solid #aaa}}