/* Space School — Rocket Race */
.ssa.is-mode .ssa-answers.t-mode{display:block}
.rc{position:relative;padding:12px;border-radius:24px;overflow:hidden;background:radial-gradient(60% 40% at 80% 0%,rgba(56,189,248,.3),transparent 70%),linear-gradient(180deg,#141b63,#0b1240)}
.rc-track{position:relative;display:grid;gap:6px;padding:10px 60px 10px 10px;border-radius:18px;background:rgba(255,255,255,.04);box-shadow:inset 0 0 0 1px rgba(255,255,255,.12)}
.rc-finish{position:absolute;right:20px;top:6px;bottom:6px;width:22px;border-radius:4px;background:repeating-conic-gradient(#fff 0 25%,#0f172a 0 50%) 0 0/11px 11px;box-shadow:0 0 14px rgba(255,255,255,.4)}
.rc-lane{position:relative;height:50px;border-bottom:2px dashed rgba(94,224,255,.25)}
.rc-lane.is-me{background:linear-gradient(90deg,rgba(245,166,35,.16),transparent)}
.rc-name{position:absolute;left:4px;top:2px;z-index:2;color:#b9c3ef;font:800 12px "Nunito Sans",sans-serif}
.rc-lane.is-me .rc-name{color:#fde68a}
.rc-rk{position:absolute;top:8px;left:calc(var(--p) * (100% - 90px) / 100);width:90px;transition:left 1s cubic-bezier(.3,.9,.3,1)}
.rc-rk svg{display:block;width:100%;height:auto}
.rc-rk .flame{animation:rcflame .15s ease-in-out infinite alternate;transform-origin:22px 30px}
@keyframes rcflame{to{transform:scaleX(1.4)}}
.rc-rk.is-boost{filter:drop-shadow(0 0 12px #f59e0b)}
.rc-q{margin:12px auto 10px;max-width:760px;text-align:center;color:#fff}
.rc-q small{display:block;color:#7dd3fc;font:800 12px "Nunito Sans",sans-serif;text-transform:uppercase;letter-spacing:.4px}
.rc-q b{display:block;margin-top:2px;font:700 clamp(18px,2.2vw,24px)/1.25 Fredoka,sans-serif}
.rc-img{display:block;max-height:100px;margin:8px auto 0;border-radius:12px}
.rc-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:820px;margin:0 auto}
.rc-c{display:flex;align-items:center;gap:10px;min-height:58px;padding:10px 14px;border:0;border-radius:16px;background:var(--c);color:#fff;font:800 clamp(14px,1.4vw,17px)/1.2 "Nunito Sans",sans-serif;text-align:start;cursor:pointer;box-shadow:0 5px 0 color-mix(in srgb,var(--c) 60%,#000);transition:transform .12s}
.rc-c i{font-style:normal;display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.25)}
.rc-c:hover{transform:translateY(-2px)}
.rc-c.is-sel{box-shadow:0 0 0 4px #fff,0 5px 0 color-mix(in srgb,var(--c) 60%,#000)}
.rc-c.is-right{background:#22c55e;box-shadow:0 0 0 4px #bbf7d0}
.rc-c.is-wrong{background:#64748b;opacity:.6}
.rc-c.is-show{box-shadow:0 0 0 4px #fde047}
.rc-c.is-gone{opacity:0;pointer-events:none}
@media (max-width:640px){.rc-cards{grid-template-columns:1fr}.rc-track{padding-right:40px}.rc-rk{width:70px;left:calc(var(--p) * (100% - 70px) / 100)}}

/* ---------- themes ---------- */
.th-camels .rc-rk svg,.th-formula .rc-rk svg,.th-nile .rc-rk svg{opacity:0}
.th-camels .rc-rk::before,.th-formula .rc-rk::before,.th-nile .rc-rk::before{position:absolute;left:50%;top:50%;transform:translate(-50%,-55%) scaleX(-1);font-size:38px;line-height:1}
.th-camels .rc-rk::before{content:"🐪"}.th-formula .rc-rk::before{content:"🏎️"}.th-nile .rc-rk::before{content:"🚤"}
.th-camels .rc-rk.is-me::before,.th-formula .rc-rk.is-me::before,.th-nile .rc-rk.is-me::before{filter:drop-shadow(0 0 8px #fde68a)}
.rc.th-camels{background:linear-gradient(180deg,#fde68a,#f59e0b)}
.th-camels .rc-track{background:repeating-linear-gradient(180deg,#fcd34d 0 48px,#fbbf24 48px 52px)}.th-camels .rc-lane{border-bottom-color:rgba(146,64,14,.35)}.th-camels .rc-name{color:#78350f}.th-camels .rc-q{color:#451a03}
.rc.th-formula{background:linear-gradient(180deg,#1f2937,#111827)}
.th-formula .rc-track{background:#374151;box-shadow:inset 0 0 0 4px #ef4444,inset 0 0 0 8px #fff}.th-formula .rc-lane{border-bottom:2px dashed rgba(255,255,255,.55)}
.rc.th-nile{background:linear-gradient(180deg,#bae6fd 0%,#bae6fd 18%,#16a34a 18%,#16a34a 22%,#0284c7 22%,#0369a1 100%)}
.th-nile .rc-track{background:repeating-linear-gradient(180deg,rgba(255,255,255,.08) 0 2px,transparent 2px 14px)}.th-nile .rc-lane{border-bottom-color:rgba(255,255,255,.35)}