.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.header-actions{display:flex;align-items:center;gap:22px}.appearance-toggle{width:34px;height:34px;border:1px solid var(--line);border-radius:50%;background:transparent;color:var(--muted);font-size:16px}.appearance-toggle:hover{color:var(--blue);border-color:#55698f}.project-search{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:5px;padding:0 10px;margin-left:auto;max-width:205px;color:var(--muted)}.project-search input{border:0;background:transparent;color:var(--ink);outline:0;width:155px;padding:9px 0;font:13px var(--font)}.project-search input::placeholder{color:#748096}.project-empty{border:1px dashed #3b4d6d;color:var(--muted);padding:30px;border-radius:9px;text-align:center}.timeline{border-top:1px solid var(--line)}.timeline-list{border-top:1px solid var(--line)}.timeline-list article{display:grid;grid-template-columns:180px 1fr;gap:30px;padding:27px 0;border-bottom:1px solid var(--line)}.timeline-date{font:11px var(--display);letter-spacing:1.5px;color:var(--blue)}.timeline-list h3{font:500 24px var(--display);margin:0 0 8px}.timeline-list p{margin:0;color:var(--muted);max-width:650px}.now{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:10%;align-items:center;background:radial-gradient(ellipse at 10% 30%,#18346b36,transparent 65%)}.now-copy>p:not(.eyebrow){color:var(--muted);max-width:500px;margin-top:25px}.now-links{display:flex;gap:25px;flex-wrap:wrap;margin-top:28px;font-size:14px}.now-links a{color:var(--blue)}.progress-panel{border:1px solid var(--line);border-radius:10px;padding:25px;background:#0d1421cc}.progress-row{display:grid;gap:9px;padding:14px 0}.progress-row+.progress-row{border-top:1px solid var(--line)}.progress-row span{font:10px var(--display);text-transform:uppercase;letter-spacing:1.6px;color:var(--muted)}.progress-row strong{font:500 15px var(--display)}.progress-row i{height:4px;background:#1e293b;border-radius:4px;display:block;overflow:hidden}.progress-row b{height:100%;display:block;background:linear-gradient(90deg,#5f83e5,#99b9ff);border-radius:4px}.dialog-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.secondary{border:1px solid #3f5276;border-radius:6px;background:#15243e;color:#b8cdf8;padding:10px 15px;font-size:13px}.secondary:hover{background:#21395f}.demo-shell{margin:25px 0 5px;padding:18px;border:1px solid #334765;border-radius:9px;background:#0a111e}.demo-heading{font:10px var(--display);letter-spacing:1.5px;color:var(--blue);margin-bottom:14px}.demo-controls,.rps-controls{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.demo-controls label{font-size:13px;color:var(--muted)}.demo-controls input{width:90px;padding:9px;border:1px solid #334765;border-radius:5px;background:#111b2a;color:var(--ink)}.demo-output{display:block;margin-top:15px;color:#cedaff;font:13px/1.7 var(--display);overflow-wrap:anywhere}.flashcard{width:100%;min-height:95px;border:1px solid #425b86;background:#14243e;border-radius:7px;color:#dfebff;display:grid;place-items:center;padding:17px}.flashcard strong{font:10px var(--display);letter-spacing:1.4px;color:#8ca8de}.light-mode{--bg:#f5f7fb;--surface:#fff;--ink:#101624;--muted:#58657a;--line:#dce3ed;--blue:#315fc4}.light-mode .header{background:#f5f7fbed}.light-mode .hero-grid{background-image:linear-gradient(#607aa018 1px,transparent 1px),linear-gradient(90deg,#607aa018 1px,transparent 1px)}.light-mode .project-visual{background-color:#eef3fc}.light-mode .project-card{box-shadow:0 10px 35px #19335d0c}.light-mode .progress-panel,.light-mode .demo-shell{background:#edf3fd}.light-mode .planet{background:#ffffffdd;box-shadow:0 0 25px #7189b520}.light-mode .planet strong{color:#18233a}.light-mode .map-core span{color:#1e2b46;text-shadow:none}.light-mode .map-core small{color:#51698f}.light-mode canvas{opacity:.75}.light-mode .header nav{background:#e9eef7}.light-mode .header nav a:hover,.light-mode .header nav a.active{background:#fff;color:#14203a}.light-mode .primary{color:#fff;background:#315fc4}.light-mode .secondary{background:#e8effb;color:#31529a}@media(max-width:760px){.header nav{max-width:calc(100vw - 150px);overflow:auto}.header nav a{padding:7px 11px;white-space:nowrap}.header-actions{gap:8px}.appearance-toggle{width:30px;height:30px;font-size:14px}.project-search{order:3;width:100%;max-width:none;margin-left:0}.project-search input{width:100%}.timeline-list article{grid-template-columns:1fr;gap:8px}.timeline-list h3{font-size:21px}.now{grid-template-columns:1fr;gap:28px}.progress-panel{padding:18px}.dialog-actions .primary{margin-top:10px}}