:root{--bg:#050814;--panel:rgba(16,24,48,.72);--line:rgba(120,160,255,.18);--text:#e8eefc;--muted:#8fa3c7;--accent:#2ee6a6;--hot:#ff7a1a;--pink:#ff3d6e;--gold:#ffd23f;--blue:#4c8dff;--r:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(1200px 700px at 80% -10%,#1a2a6c55,transparent 60%),radial-gradient(900px 600px at -10% 30%,#5b1a6c33,transparent 60%),var(--bg);color:var(--text);font:16px/1.6 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;min-height:100vh;overflow-x:hidden}
.bg-stars{position:fixed;inset:0;pointer-events:none;z-index:-1;background-image:radial-gradient(1px 1px at 20% 30%,#fff8,transparent),radial-gradient(1px 1px at 70% 80%,#fff6,transparent),radial-gradient(1.5px 1.5px at 40% 60%,#fff9,transparent),radial-gradient(1px 1px at 90% 20%,#fff7,transparent),radial-gradient(1px 1px at 10% 85%,#fff5,transparent);background-size:400px 400px}
a{color:inherit;text-decoration:none}
.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:12px clamp(16px,4vw,48px);background:rgba(5,8,20,.7);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{font-weight:800;font-size:1.2rem;letter-spacing:.02em}.logo{filter:drop-shadow(0 0 8px #ff7a1a)}
nav{display:flex;gap:clamp(10px,2.5vw,28px);font-size:.92rem;color:var(--muted)}nav a:hover{color:var(--text)}
.hero{text-align:center;padding:clamp(36px,7vw,80px) 20px 24px}
.eyebrow{color:var(--accent);text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:700;margin:0}
h1{font-size:clamp(3rem,10vw,6.5rem);line-height:1;margin:.15em 0;font-weight:900;letter-spacing:-.03em;background:linear-gradient(180deg,#fff,#9fb6ff);-webkit-background-clip:text;background-clip:text;color:transparent}
h1 span{background:linear-gradient(90deg,var(--hot),var(--pink));-webkit-background-clip:text;background-clip:text}
.lead{max-width:640px;margin:0 auto;color:var(--muted);font-size:1.06rem}
.hero-stats{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats div{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:10px 18px;min-width:120px}
.hero-stats b{display:block;font-size:1.5rem;color:var(--gold)}.hero-stats small{color:var(--muted)}
.lab{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:20px;padding:12px clamp(12px,3vw,40px) 40px;max-width:1500px;margin:0 auto}
.viewer{position:relative;height:min(78vh,760px);min-height:440px;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:#050814;box-shadow:0 30px 80px -30px #000,inset 0 0 120px #2a4bff22}
.viewer canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}
.viewer .loading{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);pointer-events:none;transition:opacity .4s}
.viewer.ready .loading{opacity:0}
.viewer-hint{position:absolute;left:12px;bottom:12px;font-size:.78rem;color:var(--muted);background:rgba(5,8,20,.6);padding:6px 10px;border-radius:10px;pointer-events:none}
.tooltip{position:absolute;pointer-events:none;background:rgba(10,16,36,.92);border:1px solid var(--accent);color:var(--text);font-size:.82rem;padding:4px 10px;border-radius:8px;white-space:nowrap}
.launch-status{position:absolute;top:14px;left:50%;transform:translateX(-50%);font-weight:700;background:rgba(5,8,20,.7);border-radius:12px;padding:0 14px;font-size:.95rem;text-align:center;max-width:92%}
.launch-status:not(:empty){padding:8px 14px;border:1px solid var(--line)}
.panel{display:flex;flex-direction:column;gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px;backdrop-filter:blur(10px)}
.card h2{margin:0 0 12px;font-size:1.05rem;letter-spacing:.02em}
.card h3{margin:0 0 8px}
.slider{display:block;font-size:.88rem;color:var(--muted)}
input[type=range]{width:100%;accent-color:var(--accent);margin:8px 0 4px}
.btn-row{display:flex;gap:8px;margin:8px 0 12px}
.btn{flex:1;border:1px solid var(--line);background:linear-gradient(180deg,#2a3c7a,#1a2652);color:var(--text);padding:10px 12px;border-radius:12px;font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:transform .1s,filter .2s}
.btn:hover{filter:brightness(1.2)}.btn:active{transform:scale(.97)}
.btn.ghost{background:transparent}
.btn.launch{width:100%;margin-top:14px;padding:14px;font-size:1.05rem;background:linear-gradient(90deg,var(--hot),var(--pink));border:none;box-shadow:0 10px 30px -10px var(--pink)}
.btn:disabled{opacity:.5;cursor:wait}
.toggles{display:grid;gap:8px}
.switch{display:flex;align-items:center;gap:10px;font-size:.9rem;cursor:pointer;user-select:none}
.switch input{display:none}
.switch span{width:38px;height:22px;border-radius:20px;background:#2a3350;position:relative;flex:none;transition:.2s}
.switch span::after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:#fff;top:3px;left:3px;transition:.2s}
.switch input:checked+span{background:var(--accent)}.switch input:checked+span::after{left:19px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.chip{border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);border-radius:20px;padding:5px 10px;font:inherit;font-size:.78rem;cursor:pointer;display:flex;align-items:center;gap:6px}
.chip.active,.chip:hover{border-color:var(--accent);background:rgba(46,230,166,.12)}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:6px;box-shadow:0 0 8px currentColor;flex:none}
.chip .dot{margin:0}
.info{min-height:130px;border-top:1px solid var(--line);padding-top:12px}
.info h3{display:flex;align-items:center;font-size:1.05rem}
.info dl{margin:0;display:grid;grid-template-columns:90px 1fr;gap:6px 10px;font-size:.88rem}
.info dt{color:var(--muted)}.info dd{margin:0}
.muted{color:var(--muted)}.center{text-align:center}
.section{max-width:1200px;margin:0 auto;padding:40px clamp(12px,3vw,40px)}
.section-title{text-align:center;font-size:clamp(1.6rem,4vw,2.4rem);margin:0 0 20px}
.grid.specs{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.spec span{font-size:1.6rem}.spec h3{margin:6px 0 4px;font-size:1rem}.spec p{margin:0;color:var(--muted);font-size:.9rem}.spec b{color:var(--text)}
.stability{margin-top:16px}
.stab-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:10px 0}
.stab-grid div,.stats div{background:rgba(255,255,255,.04);border-radius:12px;padding:10px 12px}
.stab-grid small,.stats small{display:block;color:var(--muted);font-size:.78rem}
.stab-grid b{font-size:1.4rem}
.stab-grid div:nth-child(1) b{color:var(--gold)}.stab-grid div:nth-child(2) b{color:var(--pink)}.stab-grid div:nth-child(3) b{color:var(--accent)}
.flight{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:16px;margin-top:16px}
.chart-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.legend{font-size:.78rem;color:var(--muted);display:flex;align-items:center;gap:6px}
.legend i{width:14px;height:10px;border-radius:3px;display:inline-block;margin-left:8px}
.l-burn{background:rgba(255,122,26,.5)}.l-coast{background:rgba(120,150,255,.35)}.l-chute{background:rgba(255,61,110,.35)}
.chart-card{display:flex;flex-direction:column}.chart-box{position:relative;height:340px;flex:1 1 auto;min-height:340px}.chart-box.short{min-height:200px}.chart-box.short{height:200px}
.chart-box canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.sim-controls{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:10px;font-size:.88rem;color:var(--muted)}
.sim-controls b{color:var(--text);float:right}
.side{display:flex;flex-direction:column;gap:16px}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.stats b{font-size:1.05rem}
.stats div:first-child b{color:var(--accent);font-size:1.4rem}
.note{grid-column:1/-1;margin:4px 0 0;font-size:.85rem}
.small-note{font-size:.88rem;margin-top:16px}
.safety{margin-bottom:40px;border-color:rgba(255,210,63,.35)}.safety p{color:var(--muted);margin:0}
footer{text-align:center;color:var(--muted);font-size:.82rem;padding:24px;border-top:1px solid var(--line)}
@media (max-width:960px){.lab{grid-template-columns:1fr}.viewer{height:62vh;min-height:380px}.flight{grid-template-columns:1fr}}
@media (max-width:560px){nav a:not(:first-child){display:none}.stab-grid{grid-template-columns:1fr}.sim-controls{grid-template-columns:1fr}.chart-box{height:260px}.hero-stats div{min-width:44%}.viewer-hint{display:none}}
section[id]{scroll-margin-top:64px}