:root{--space-ink:#17324a;--space-orange:#f97316;--space-gold:#facc15;--space-teal:#0f766e}
body{background:radial-gradient(circle at 12% 18%,rgba(250,204,21,.18),transparent 24rem),linear-gradient(135deg,#e9fbf7 0%,#fff8e8 52%,#eaf2ff 100%)}
.spaceport-shell{max-width:1220px;margin:0 auto;padding:18px;display:grid;grid-template-columns:minmax(0,1.55fr) minmax(300px,.75fr);gap:18px}
.mission-card,.dock-card{border:2px solid rgba(23,50,74,.15);box-shadow:0 16px 35px rgba(23,50,74,.12);background:rgba(255,255,255,.94)}
.mission-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px}.mission-kicker{font-weight:900;letter-spacing:.08em;color:var(--space-teal);font-size:.82rem}.mission-head h2{margin:4px 0 0;font-size:clamp(1.35rem,3vw,2rem);color:var(--space-ink)}
.launch-status{padding:9px 12px;border-radius:999px;background:#e2e8f0;color:#475569;font-weight:900;white-space:nowrap}.launch-status.ready{background:#dcfce7;color:#166534;box-shadow:0 0 0 5px rgba(34,197,94,.12)}
.control-deck{display:flex;flex-wrap:wrap;gap:10px;align-items:end;padding:12px;border-radius:18px;background:#f8fafc;border:1px solid #dbe4ea}.control-deck label{display:grid;gap:4px;font-size:.78rem;font-weight:900;color:#475569}.control-deck select{min-width:145px}
.launch-button{background:linear-gradient(135deg,var(--space-orange),#ea580c)!important;color:#fff!important;border:0!important;box-shadow:0 7px 0 #9a3412;font-weight:900}.launch-button:active{transform:translateY(4px);box-shadow:0 3px 0 #9a3412}
.engineering-board{margin-top:14px;border-radius:22px;padding:16px;background:linear-gradient(145deg,#17324a,#0f5260);color:#fff;overflow:hidden;position:relative}.engineering-board::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:22px 22px;pointer-events:none}
.board-top,.board-visual,.question-zone{position:relative;z-index:1}.board-top{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}.family-chip{padding:7px 10px;border:1px solid rgba(255,255,255,.24);border-radius:999px;background:rgba(255,255,255,.1);font-weight:900}
.board-visual{min-height:190px;display:flex;gap:18px;align-items:center;justify-content:center;flex-wrap:wrap;padding:12px}.height-map-wrap{display:grid;gap:7px;text-align:center}.height-map-title{font-weight:900;color:#fde68a}
.height-map{display:grid;grid-template-columns:repeat(3,54px);gap:7px;transform:rotateX(53deg) rotateZ(-28deg);transform-style:preserve-3d;margin:14px 28px 25px}.height-cell{width:54px;height:54px;position:relative;border-radius:8px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.25);display:grid;place-items:center;transform-style:preserve-3d}.height-cell::before{content:"";position:absolute;left:8px;right:8px;bottom:8px;height:calc(var(--h) * 14px);max-height:70px;border-radius:7px 7px 3px 3px;background:linear-gradient(135deg,#fde047,#f97316);box-shadow:inset -8px -8px 0 rgba(154,52,18,.2),0 8px 13px rgba(0,0,0,.22);transform:translateZ(calc(var(--h) * 4px))}.height-cell span{position:relative;z-index:2;font-weight:1000;color:#fff;text-shadow:0 2px 3px #17324a;transform:rotateZ(28deg) rotateX(-53deg)}
.dimension-block{padding:20px 24px;border:2px dashed #fde68a;border-radius:18px;background:rgba(255,255,255,.1);font-size:1.25rem;font-weight:1000;text-align:center}.question-zone{background:rgba(255,255,255,.96);color:var(--space-ink);border-radius:18px;padding:16px;margin-top:4px}.q{font-size:1.08rem;line-height:1.65;font-weight:800}
.choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}.space-choice{text-align:left;border:2px solid #d9e2ea;border-radius:16px;padding:13px 14px;background:#fff;color:var(--space-ink);font:inherit;font-weight:850;line-height:1.45;cursor:pointer;min-height:74px;transition:transform .15s,border-color .15s,box-shadow .15s}.space-choice:hover:not(:disabled),.space-choice:focus-visible:not(:disabled){transform:translateY(-2px);border-color:var(--space-orange);box-shadow:0 8px 20px rgba(249,115,22,.18)}.space-choice.wrong{border-color:#fb7185;background:#fff1f2;color:#9f1239}.space-choice.correct{border-color:#22c55e;background:#ecfdf5;color:#166534;animation:choice-lock .55s ease both}.space-choice:disabled{cursor:default;opacity:.56}.space-choice.correct:disabled{opacity:1}
@keyframes choice-lock{50%{transform:scale(1.025)}100%{transform:scale(1)}}.diagnostic{display:none;margin-top:12px;padding:12px 14px;border-radius:14px;background:#fff7ed;border:1px solid #fdba74;color:#9a3412;font-weight:800}.diagnostic.show{display:block}.tool-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:12px}#answer,#btnCheck{position:absolute!important;width:1px!important;height:1px!important;overflow:hidden!important;clip:rect(0 0 0 0)!important;white-space:nowrap!important}
.dock-card h2{color:var(--space-ink)}.progress-meter{height:16px;border-radius:999px;background:#e2e8f0;overflow:hidden;margin:8px 0}.progress-meter>span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--space-orange),var(--space-gold));transition:width .45s ease}.milestone-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:12px 0}.milestone{padding:10px 4px;text-align:center;border:1px solid #dbe4ea;border-radius:12px;background:#f8fafc;color:#94a3b8;font-weight:900;font-size:.78rem}.milestone.on{background:#fef3c7;border-color:#f59e0b;color:#92400e}.achievement-note{font-size:.84rem;color:#475569;line-height:1.5}.session-stats{grid-template-columns:repeat(4,1fr)}.safe-reset{grid-column:1/-1;text-align:center;padding:18px 0 4px}.safe-reset .btn{border-color:#cbd5e1;color:#64748b;background:#fff}
.launch-burst .height-cell::before{animation:module-rise .62s cubic-bezier(.2,.9,.2,1) both}@keyframes module-rise{0%{filter:brightness(.7);transform:translateZ(0) scale(.78)}75%{filter:brightness(1.35)}100%{filter:none;transform:translateZ(calc(var(--h) * 4px)) scale(1)}}
@media(max-width:860px){.spaceport-shell{grid-template-columns:1fr;padding:10px}.choice-grid{grid-template-columns:1fr}.mission-head{align-items:center}.board-visual{min-height:170px}.height-map{grid-template-columns:repeat(3,46px)}.height-cell{width:46px;height:46px}.session-stats{grid-template-columns:repeat(2,1fr)}}
@media(prefers-reduced-motion:reduce){.space-choice,.progress-meter>span,.launch-burst .height-cell::before{transition:none!important;animation:none!important}}