:root{color-scheme:light;font-family:IBM Plex Sans,sans-serif;background:radial-gradient(circle at top left,rgba(255,216,77,.36) 0%,transparent 30%),linear-gradient(180deg,#dff5ff,#f7fbff 48%,#e8f8e7);color:#182028;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-height:100vh}button{font:inherit}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh}.nav{display:flex;gap:16px;padding:20px 24px}.page{padding:24px}.hero{margin-bottom:24px}.grid{display:grid;gap:16px}.track-card,.empty-state{border:1px solid #d7c6a5;border-radius:20px;background:#ffffffd1;padding:20px}.track-card h2,.empty-state h2{margin-top:8px}.mission-page{width:min(1120px,100%);margin:0 auto;padding:24px clamp(16px,4vw,40px) 48px}.mission-hero{position:relative;overflow:hidden;min-height:190px;margin-bottom:20px;border:1px solid rgba(47,133,232,.18);border-radius:8px;background:radial-gradient(circle at 88% 22%,#ffd84d 0 30px,transparent 31px),linear-gradient(145deg,#dff5ff,#f7fbff 52%,#b9e8b6);padding:clamp(22px,5vw,44px);box-shadow:0 18px 42px #27313b1a}.mission-hero:after{position:absolute;right:clamp(18px,5vw,62px);bottom:-20px;width:min(36vw,260px);height:92px;border-radius:50% 50% 0 0;background:#73c96b;box-shadow:-90px 26px #4fa85a,84px 18px #8bd882;content:""}.mission-hero p,.mission-hero h1{position:relative;z-index:1;max-width:680px}.mission-hero-intro{position:relative;z-index:1;display:flex;align-items:center;gap:clamp(14px,3vw,22px)}.character-avatar{flex-shrink:0;width:64px;height:64px;opacity:0;transition:opacity .18s ease;background:transparent}.character-avatar[data-loaded=true]{opacity:1}.character-avatar-fallback{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;border:3px solid #27313b;color:#fff;font-weight:800;font-size:28px;letter-spacing:0;line-height:1;opacity:1;background:#5aa9d8}.character-avatar-fallback[data-character=robo]{background:#5aa9d8}.character-avatar-fallback[data-character=dino]{background:#4fa85a}.character-avatar-fallback[data-character=bunny]{background:#f298b8}@media(min-width:720px){.character-avatar{width:96px;height:96px}.character-avatar-fallback{font-size:40px}}.mission-hero p{margin:0;color:#315061;font-weight:700}.mission-hero h1{margin:10px 0;color:#182028;font-size:clamp(2.1rem,6vw,4.4rem);line-height:.98;letter-spacing:0}.mission-page>.grid{grid-template-columns:minmax(250px,.92fr) minmax(260px,1fr);align-items:stretch}.mission-page .track-card{border-color:#2563432e;border-radius:8px;background:#f7fbffeb;box-shadow:0 16px 34px #27313b1a}.mission-character{display:grid;grid-row:span 2;min-height:420px;align-content:start;gap:14px}.mission-character img,.mission-hero img{display:block;width:100%;max-width:360px;aspect-ratio:4 / 3;object-fit:contain}.mission-character img{justify-self:center;border-radius:8px;background:#dff5ff}.mission-panel{display:grid;align-content:start;gap:14px;min-height:200px}.mission-panel h2,.mission-character h2{margin:0;color:#1f3d2c}.mission-panel p,.mission-character p{margin:0;color:#253846;line-height:1.65}.english-line{min-height:3.5rem;color:#1f3d2c;font-size:1.35rem;font-weight:800}.dad-guide{border-left:8px solid #ffd84d}.reward-panel{grid-column:2}.choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;width:100%;min-height:86px}.choice{display:grid;place-items:center;min-height:76px;border:2px solid #8bd882;border-radius:8px;background:#f7fbff;color:#182028;font-size:1.25rem;font-weight:800;line-height:1.25;text-align:center;cursor:pointer;transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease,transform .15s ease}.choice:hover,.choice:focus-visible{border-color:#2f85e8;box-shadow:0 0 0 4px #2f85e82e;outline:none;transform:translateY(-1px)}.choice.selected,.choice[aria-pressed=true]{border-color:#1b5e20;background:#d7f5cf;color:#102a16;box-shadow:inset 0 0 0 2px #4fa85a}.choice img{width:min(100%,108px);aspect-ratio:4 / 3;object-fit:contain}.mission-character button,.reward-panel button:not(.choice){min-height:48px;border:0;border-radius:8px;background:#e8463f;color:#fff;font-weight:800;cursor:pointer;box-shadow:0 10px 20px #e8463f33}.mission-character button:hover,.mission-character button:focus-visible,.reward-panel button:not(.choice):hover,.reward-panel button:not(.choice):focus-visible{background:#c93431;outline:3px solid rgba(232,70,63,.25);outline-offset:2px}.reward-panel strong{display:inline-grid;min-height:44px;place-items:center;border-radius:8px;background:#ffd84d;color:#1f3d2c;font-size:1.25rem}@media(max-width:700px){.nav{flex-wrap:wrap;padding:16px}.mission-page{padding:16px 14px 36px}.mission-hero{min-height:164px;padding:22px 18px 58px}.mission-hero:after{right:20px;width:210px;height:74px}.mission-page>.grid{grid-template-columns:1fr}.mission-character,.mission-panel{grid-row:auto;min-height:auto}.mission-character img,.mission-hero img{max-width:100%}.reward-panel{grid-column:auto}.choice-grid{grid-template-columns:1fr;min-height:0}.choice{min-height:66px}}