:root{color-scheme:dark;--bg:#080d15;--panel:#121c29;--line:#2b3a4b;--text:#f4f8fa;--muted:#b4c2ce;--mint:#9fe4b3}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 'Segoe UI',Arial,sans-serif}a{color:inherit}a:focus-visible,summary:focus-visible{outline:3px solid #9fe4b3;outline-offset:5px}.nav,main,footer{max-width:1200px;margin:auto;padding:24px}.nav{display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line)}.brand{font-weight:900;letter-spacing:2px;text-decoration:none;white-space:nowrap}.brand span{color:var(--mint)}nav{display:flex;gap:24px;flex-wrap:wrap}nav a{font-size:.9rem;text-decoration:none;color:var(--muted)}nav a:hover{color:white}.hero{display:grid;grid-template-columns:1.35fr 1fr;gap:45px;align-items:center;padding:70px 0 50px}.eyebrow{font-size:.74rem;font-weight:800;letter-spacing:2px;color:var(--mint);margin:0 0 16px}h1{font-size:clamp(2.6rem,5.5vw,4.8rem);line-height:1.05;letter-spacing:-2px;margin:0 0 24px}h1 span{font-size:.57em;letter-spacing:1px;color:var(--mint)}.intro{font-size:1.35rem;margin-bottom:12px}.muted{color:var(--muted)}.hero-copy>.muted{max-width:550px;margin-bottom:28px}.button{display:inline-flex;align-items:center;justify-content:center;gap:15px;padding:14px 22px;border:1px solid transparent;border-radius:12px;text-decoration:none;font:700 1rem 'Segoe UI',Arial,sans-serif;min-height:52px}.primary{background:var(--mint);color:#09261b}.primary:hover{background:#c2f5d0}.full{width:100%}.disabled{background:#233140;color:#c3ccd5;border:1px solid #405264;cursor:not-allowed}.tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.tags span{border:1px solid var(--line);padding:4px 10px;font-size:.75rem;border-radius:7px;color:var(--muted)}.hero-art{min-height:390px;border-radius:26px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;background:radial-gradient(ellipse at center,#315b4b,#122c2b 65%,#101c28);border:1px solid #426753}.orbit{position:absolute;width:285px;height:285px;border:1px solid #91d7a744;border-radius:50%}.o2{width:370px;height:370px;border-style:dashed}.monogram{text-align:center;font-weight:950;font-size:4.5rem;line-height:.95;color:#d9ffe4;text-shadow:0 8px 25px #0008;transform:rotate(-6deg)}.monogram span{display:block;font-size:7rem;color:#a5e8b9}.art-label,.art-bottom{position:absolute;font-size:.7rem;letter-spacing:3px;color:#cfedda}.art-label{top:24px;left:24px}.art-bottom{bottom:24px}.section{padding:40px 0}h2{font-size:clamp(1.7rem,3vw,2.4rem);letter-spacing:-.6px;line-height:1.2;margin:8px 0 18px}h3{font-size:1.45rem;margin:12px 0}.downloads,.instructions{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:28px}.download-card,.instructions article{padding:30px;background:var(--panel);border:1px solid var(--line);border-radius:20px}.card-top{display:flex;justify-content:space-between;align-items:center}.platform-icon{font-size:2.5rem;line-height:1;color:var(--mint)}.badge{font-size:.75rem;background:#293644;padding:5px 11px;border-radius:30px;color:#d8e0e8}.badge.ready{background:#224c33;color:#b4f4c5}dl{margin:25px 0}dl div{display:flex;justify-content:space-between;gap:20px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.9rem}dt{color:var(--muted)}dd{margin:0;text-align:right}.requirements{font-size:.8rem;color:var(--muted);margin-bottom:0}.instructions ol{padding-left:24px;color:var(--muted)}li{padding:5px 0}.save-note{margin:25px 0;padding:32px 36px;border:1px solid #426753;border-left:4px solid var(--mint);border-radius:15px;background:#10251f}.save-note p{max-width:850px}.faq details{padding:20px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:700}details p{color:var(--muted)}footer{margin-top:30px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:.8rem;color:var(--muted)}@media(max-width:760px){.hero{grid-template-columns:1fr;padding-top:40px;gap:25px}.hero-art{min-height:280px}.downloads,.instructions{grid-template-columns:1fr}.nav{align-items:flex-start;flex-direction:column}nav{gap:18px}.download-card,.instructions article{padding:24px}footer{align-items:flex-start;flex-direction:column;gap:5px}.save-note{padding:26px}h1{letter-spacing:-1px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}