:root{color-scheme:dark;--bg:#09131e;--panel:#10202e;--text:#e9f3f6;--muted:#a0b5c3;--cyan:#63e3e9;--line:#2b4252;--gold:#dfbb80}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans',sans-serif;line-height:1.7}button,a{touch-action:manipulation}button{font:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,canvas:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:4px}.top,main,footer{max-width:1240px;margin:auto;padding-left:32px;padding-right:32px}.top{height:100px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px}.brand b{font-size:25px;border:1px solid var(--cyan);color:var(--cyan);width:46px;height:46px;display:grid;place-items:center}.brand span{font-weight:750;letter-spacing:.15em;line-height:1.3}.brand small{font-size:10px;display:block;font-weight:400;letter-spacing:.2em;margin-top:5px}.scope{font-size:10px;color:var(--muted);letter-spacing:.2em}.intro{padding:30px 0 22px}.eyebrow{font-size:11px;color:var(--cyan);letter-spacing:.15em;margin:0 0 12px}h1{font-size:clamp(30px,4.5vw,54px);font-weight:700;letter-spacing:-.04em;line-height:1.3;margin:10px 0 18px}h1 span{color:var(--cyan)}.intro>p:last-child{color:var(--muted);font-size:14px}.main-nav{display:flex;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0;font-size:12px}.main-nav a:hover{color:var(--cyan)}section{padding-top:54px}.section-title{display:flex;justify-content:space-between;gap:24px;align-items:flex-end;margin-bottom:24px}.section-title h2{font-size:27px;letter-spacing:-.03em;margin:0}.section-title>p{font-size:12px;color:var(--muted);margin:0;line-height:1.8}.experience-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:22px}.model-card,.game-card{background:var(--panel);border:1px solid var(--line);border-radius:15px;overflow:hidden}.card-label{display:flex;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.1em;color:var(--muted)}#model{width:100%;height:330px;display:block;touch-action:none;cursor:grab;background:radial-gradient(ellipse at 50% 70%,#173b47 0%,#10202e 68%)}#model:active{cursor:grabbing}.model-controls{display:flex;justify-content:center;gap:8px;padding:0 16px 12px}.model-controls button,.compare-bar button{background:#183342;border:1px solid #3c5968;border-radius:5px;color:var(--text);padding:7px 13px;font-size:12px;min-height:36px}.model-controls button[aria-pressed=true],.compare-bar button[aria-pressed=true]{color:#09131e;background:var(--cyan);border-color:var(--cyan)}.card-copy{padding:20px 25px 24px;border-top:1px solid var(--line)}.card-copy h3{font-size:22px;margin:0 0 8px}.card-copy p{font-size:13px;color:#c1d1d8;margin:0 0 12px}.card-copy small{display:block;font-size:10px;color:var(--muted);line-height:1.7;margin-top:14px}.game-cover{display:block;position:relative;height:303px;background:#080f18;overflow:hidden}.game-cover img{width:100%;height:100%;object-fit:cover;opacity:.8}.play-icon{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:68px;border-radius:50%;background:var(--cyan);color:var(--bg);display:grid;place-items:center;padding-left:4px;font-size:22px;box-shadow:0 0 0 12px #60e3e926}.primary{background:var(--cyan);color:#09131e;display:flex;justify-content:space-between;padding:12px 16px;border-radius:7px;font-weight:700;font-size:13px}.video-detail{border:1px solid var(--line);border-radius:10px;margin-top:20px;background:#0d1b28}summary{cursor:pointer;padding:16px 20px;font-size:13px}summary span{float:right;color:var(--muted);font-size:11px}.video-inner{padding:4px 20px 20px;display:grid;grid-template-columns:2fr 1fr;gap:24px}.video-inner video{width:100%;border-radius:7px}.video-inner p{font-size:12px;color:var(--muted)}.lesson-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}.lesson-tabs button{padding:10px 20px;border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:7px;font-size:13px}.lesson-tabs button[aria-selected=true]{background:var(--text);color:var(--bg);border-color:var(--text)}.lesson-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:28px;align-items:start}.lesson-visual{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}.compare-bar{padding:13px;display:flex;align-items:center;justify-content:space-between;gap:10px}.compare-bar>span{font-size:10px;color:var(--muted)}.compare-bar>div{display:flex;gap:6px}.screenshot-button{background:transparent;border:0;padding:0;color:var(--muted);width:100%;display:block}.screenshot-button img{width:100%;display:block;aspect-ratio:1.452;object-fit:contain;background:#101820}.screenshot-button span{display:block;padding:9px;font-size:10px}.lesson-copy{padding:10px 0}.lesson-copy h3{font-size:25px;line-height:1.4;margin:10px 0}.lesson-copy>p{font-size:13px;color:var(--muted)}.lesson-copy ol{padding-left:22px;font-size:13px;line-height:1.9}.lesson-copy li{margin-bottom:8px}.lesson-copy .result{border-left:2px solid var(--cyan);padding:9px 14px;background:#142b36;color:var(--text);font-size:13px}.lesson-copy .note{font-size:11px}.downloads{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.downloads article{border-top:1px solid var(--cyan);padding:20px 0}.downloads span{font-size:11px;color:var(--cyan)}.downloads h3{font-size:16px;margin:12px 0}.downloads p{font-size:12px;color:var(--muted);min-height:65px}.downloads a,.file-links a{font-size:12px;color:var(--cyan);display:inline-block;margin:8px 15px 8px 0;border-bottom:1px solid #365c6b}.technical{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:14px}.technical p,.file-links{padding:0 20px;font-size:12px;color:var(--muted)}.file-links{padding-bottom:16px}.honesty{margin:40px 0;color:var(--muted);font-size:11px;max-width:880px}.honesty h3{font-size:13px;color:var(--text)}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:25px;padding-bottom:30px;font-size:10px;color:var(--muted)}dialog{border:1px solid var(--line);padding:45px 10px 10px;background:var(--bg);border-radius:10px;max-width:96vw;max-height:95vh}dialog::backdrop{background:#020811df}dialog img{display:block;max-width:90vw;max-height:80vh;object-fit:contain}#close-dialog{position:absolute;right:15px;top:10px;color:var(--text);background:transparent;border:0;padding:6px}@media(max-width:760px){.top,main,footer{padding-left:18px;padding-right:18px}.top{height:78px}.scope{font-size:8px}.brand b{width:38px;height:38px;font-size:22px}.intro{padding-top:18px}h1 span{display:block}.main-nav{gap:16px;font-size:10px;overflow:auto;white-space:nowrap}.section-title{display:block}.section-title>p{margin-top:14px}.section-title h2{font-size:24px}section{padding-top:40px}.experience-grid,.lesson-layout{grid-template-columns:1fr}.game-cover{height:230px}.model-card #model{height:300px}.card-copy{padding:19px}.lesson-tabs button{padding:8px 15px;font-size:12px}.lesson-copy{padding-top:0}.video-inner{grid-template-columns:1fr}.downloads{grid-template-columns:1fr 1fr;gap:14px}.downloads p{min-height:0}.downloads article{padding-top:14px}.downloads h3{font-size:15px}footer{display:block}footer span{display:block;margin:5px 0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.skip-link{position:absolute;left:20px;top:-100px;background:var(--cyan);color:var(--bg);padding:12px;z-index:10}.skip-link:focus{top:12px}.lesson-picker{display:flex;gap:14px;align-items:center;margin-bottom:16px;font-size:12px}.lesson-picker select{font:inherit;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:7px;padding:12px;max-width:100%;min-height:44px}.lesson-picker>span{color:var(--muted);margin-left:auto}.device-guide{padding:22px;border:1px solid var(--line);border-radius:10px;margin-bottom:34px;background:var(--panel);font-size:13px}.device-guide p{color:var(--muted)}.model-controls button,.compare-bar button,.lesson-tabs button{min-height:44px}.file-links a{overflow-wrap:anywhere;padding:5px 0}.technical summary{min-height:52px}.intro{padding-top:16px}.top{height:82px}.main-nav{position:sticky;top:0;background:#09131ef5;z-index:5}html{scroll-padding-top:80px}@media(max-width:760px){.lesson-picker{flex-wrap:wrap}.lesson-picker label{width:100%}.lesson-picker select{width:100%}.lesson-picker>span{margin-left:0}.lesson-tabs{display:none}.intro h1{font-size:30px}.intro h1 span{display:inline}.top{height:72px}.intro{padding-bottom:12px}.main-nav{gap:12px}.device-guide{padding:16px}.downloads{grid-template-columns:1fr}.downloads article{padding-bottom:10px}.scope{letter-spacing:.08em}button{min-height:44px}}

/* Nexus_ai family navigation */
.home-link{font-size:12px;min-height:44px;display:inline-flex;align-items:center;gap:8px;color:var(--muted)}.home-link:hover,.breadcrumb a:hover,footer a:hover{color:var(--cyan)}.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;align-items:center;color:var(--muted);font-size:11px;padding:2px 0 10px}.breadcrumb a,.project-link{display:inline-flex;align-items:center;min-height:44px}.breadcrumb [aria-current]{color:var(--text)}.intro h1 span{font-size:.55em;letter-spacing:0;font-weight:500}.intro>p{color:var(--muted);font-size:14px}.intro>.eyebrow{color:var(--cyan);font-size:11px}.project-link{font-size:12px;color:var(--cyan);gap:8px;text-decoration:underline;text-underline-offset:4px}footer nav{display:flex;flex-wrap:wrap;gap:16px}footer nav a{display:inline-flex;align-items:center;min-height:44px}@media(max-width:760px){.home-link{font-size:10px;max-width:125px;line-height:1.5}.brand small{font-size:9px;letter-spacing:.08em}.intro h1 span{display:block;font-size:20px;margin-top:8px}.breadcrumb{font-size:10px;padding-bottom:0}footer nav{gap:20px}}