@font-face{font-family:Kota;src:url('../assets/kota-book.woff')}@font-face{font-family:Kota;src:url('../assets/kota-demi.woff');font-weight:700}
:root{--ink:#243b4a;--muted:#617687;--blue:#187caa;--navy:#1e5773;--yellow:#ffd25a;--orange:#f39a4f;--green:#64b98a;--paper:#fffef9;--line:#dde8ed;--shadow:0 14px 34px rgba(40,78,96,.12)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Kota,system-ui,sans-serif;color:var(--ink);background:#f7fbfc}button,select{font:inherit}button{touch-action:manipulation}.app-shell{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#fffdf7,#f0f8fb)}
.topbar{min-height:94px;padding:14px clamp(18px,3vw,42px);display:flex;align-items:center;justify-content:space-between;gap:18px;background:rgba(255,255,255,.94);border-bottom:1px solid #e4ecef;box-shadow:0 5px 20px rgba(32,70,90,.06);z-index:5}.brand-wrap{display:flex;align-items:center;gap:14px}.back-button{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;text-decoration:none;font-size:36px;color:var(--blue);background:#edf7fb;border:1px solid #d9e9ef}.brand-icon{width:58px;height:58px;border-radius:19px;background:#fff0b9;display:grid;place-items:center;font-size:34px;box-shadow:inset 0 -5px 0 rgba(243,154,79,.12)}.brand h1{font-size:clamp(25px,2.4vw,38px);margin:0;line-height:1}.brand p{margin:5px 0 0;font-size:15px;color:#6b7d89}.header-tools{display:flex;gap:10px;align-items:center}.tool-button,.icon-button{border:0;border-radius:15px;background:#edf6fa;color:#245d78;font-weight:700;min-height:48px;padding:0 16px;cursor:pointer}.creator{background:#fff2c6;color:#765717}.teacher{background:#1d789c;color:#fff}.icon-button{width:50px;padding:0;font-size:24px}
.workspace{flex:1;padding:20px clamp(18px,3vw,42px) 16px;display:flex;flex-direction:column;gap:16px}.instruction-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:17px 22px;box-shadow:var(--shadow)}.mission-kicker{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.mission-kicker span{font-size:13px;font-weight:700;padding:6px 10px;border-radius:999px;background:#eef7fb;color:#306a84}.mission-kicker span:nth-child(2){background:#fff0bc;color:#795b08}.mission-kicker span:nth-child(3){background:#e9f7ee;color:#3d7352}.mission-copy{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-top:7px}.mission-copy h2{font-size:clamp(26px,2.5vw,38px);margin:0 0 4px}.mission-copy p{font-size:19px;color:var(--muted);margin:0}.score-card{min-width:128px;border-radius:19px;padding:11px 15px;background:#fff7d7;text-align:center}.score-card span{display:block;font-size:13px;color:#755d1a}.score-card strong{font-size:30px;color:#8b6710}
.rail-scene{position:relative;min-height:300px;background:linear-gradient(#dff4ff 0 62%,#d9efc7 62%);border:1px solid #d7e7e8;border-radius:30px;overflow:hidden;box-shadow:var(--shadow);display:flex;align-items:flex-end;padding:42px 22px 52px}.sky-decor{position:absolute;inset:16px 24px auto;display:flex;justify-content:space-between;font-size:40px;opacity:.78}.hills{position:absolute;left:-5%;right:-5%;bottom:72px;height:95px;background:radial-gradient(ellipse at 20% 100%,#9ed09a 0 45%,transparent 46%),radial-gradient(ellipse at 50% 100%,#8bc688 0 45%,transparent 46%),radial-gradient(ellipse at 80% 100%,#acd7a4 0 45%,transparent 46%)}.train-wrap{position:relative;z-index:2;width:100%;display:flex;align-items:flex-end;gap:10px;overflow-x:auto;padding:10px 6px 14px;scrollbar-width:thin}.engine{flex:0 0 112px;height:112px;display:flex;align-items:end;justify-content:center;position:relative}.cab{font-size:92px;filter:drop-shadow(0 8px 6px rgba(0,0,0,.12))}.wagon-track{display:flex;gap:10px;align-items:flex-end}.wagon{width:112px;height:105px;flex:0 0 112px;border-radius:20px 20px 16px 16px;background:#fff;border:4px solid #7e9cab;box-shadow:0 8px 12px rgba(41,78,93,.13);position:relative;display:flex;align-items:center;justify-content:center}.wagon:after,.wagon:before{content:"";position:absolute;width:20px;height:20px;border-radius:50%;background:#445966;bottom:-13px;border:4px solid #fff}.wagon:before{left:14px}.wagon:after{right:14px}.wagon+.wagon{margin-left:4px}.wagon+.wagon:before{box-shadow:-13px -39px 0 -7px #5f7682}.wagon.missing{background:repeating-linear-gradient(135deg,#fff,#fff 10px,#edf5f8 10px,#edf5f8 20px);border-style:dashed;border-color:#2c86ad}.wagon.missing .wagon-content{font-size:42px;color:#3b83a2}.wagon.revealed{animation:pop .28s ease-out;border-color:#53a875}.wagon-content{display:grid;place-items:center;min-width:70px;min-height:70px}.visual-emoji{font-size:54px;line-height:1}.visual-shape{display:block;filter:drop-shadow(0 5px 3px rgba(0,0,0,.08))}.shape-circle{border-radius:50%}.shape-square{border-radius:8px}.shape-triangle{width:0!important;height:0!important;background:transparent!important;border-left:30px solid transparent;border-right:30px solid transparent;border-bottom:54px solid var(--shape-color)}.rail{position:absolute;z-index:1;left:0;right:0;bottom:28px;height:32px}.rail span{position:absolute;left:0;right:0;height:5px;background:#6c7c83}.rail span:first-child{top:4px}.rail span:last-child{bottom:4px}.rail:after{content:"";position:absolute;inset:5px 0;background:repeating-linear-gradient(90deg,transparent 0 30px,#7f654f 30px 42px,transparent 42px 67px)}
.choices-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:18px 22px;box-shadow:var(--shadow)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px}.mini-label{font-size:12px;letter-spacing:.12em;color:#2a7c9f;font-weight:700}.section-heading h3{font-size:25px;margin:3px 0 0}.section-heading p{margin:0;color:var(--muted);font-size:15px}.choice-grid{display:grid;grid-template-columns:repeat(4,minmax(120px,1fr));gap:12px;margin-top:15px}.choice-card{min-height:115px;border:2px solid #e0eaee;background:#fbfeff;border-radius:22px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.17s}.choice-card:hover,.choice-card:focus-visible{transform:translateY(-2px);border-color:#8ac5db;outline:none}.choice-card.selected{border:4px solid #2588b2;box-shadow:0 0 0 5px rgba(37,136,178,.12);background:#eef9fd}@keyframes pop{from{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}
.bottom-dock{padding:12px clamp(18px,3vw,42px);display:flex;align-items:center;justify-content:space-between;gap:20px;background:#fff;border-top:1px solid #dfe8ec;box-shadow:0 -6px 22px rgba(45,89,82,.06)}.feedback{display:flex;align-items:center;gap:10px;font-size:17px;color:#4b6673}.feedback-icon{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;background:#fff4c8}.feedback.good{color:#176c50}.feedback.bad{color:#a24f42}.actions{display:flex;gap:10px}.secondary-button,.primary-button{border:0;border-radius:16px;min-height:50px;padding:0 19px;font-weight:700;cursor:pointer}.secondary-button{background:#edf5f8;color:#326377}.primary-button{background:#1d83aa;color:#fff;box-shadow:0 7px 15px rgba(29,131,170,.2)}.primary-button:disabled{opacity:.45;cursor:default;box-shadow:none}footer{text-align:center;padding:8px 12px 10px;color:#6a7e88;background:#fff;font-size:13px}
.dialog{border:0;border-radius:28px;padding:0;max-width:660px;width:min(660px,calc(100vw - 32px));box-shadow:0 28px 80px rgba(24,65,78,.3);color:var(--ink)}.dialog::backdrop{background:rgba(20,48,63,.42);backdrop-filter:blur(3px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;padding:24px 26px 16px;border-bottom:1px solid #e5ecef}.dialog-head h2{font-size:30px;margin:4px 0 0}.eyebrow{font-size:12px;color:#227a9b;letter-spacing:.12em;font-weight:700}.close-button{border:0;background:#eff6f8;border-radius:14px;width:44px;height:44px;font-size:28px;color:#4f6e7a;cursor:pointer}.dialog-body{padding:12px 26px 26px}.setting{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 0;border-bottom:1px solid #edf1f2}.setting span{display:flex;flex-direction:column;gap:4px}.setting small{color:#71838c;font-size:13px}.setting select,.creator-field select{border:1px solid #d1e0e6;background:#fff;border-radius:13px;padding:10px 36px 10px 12px;font-weight:700;color:#315f72;min-width:160px}.toggle-setting input{width:24px;height:24px;accent-color:#1d83aa}.apply-button{width:100%;border:0;border-radius:17px;background:#1d83aa;color:#fff;font-weight:700;padding:15px;margin-top:20px;cursor:pointer}.creator-intro{margin:6px 0 18px;color:var(--muted)}.creator-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.creator-field{display:flex;flex-direction:column;gap:7px;background:#f7fbfd;padding:13px;border-radius:16px}.creator-field span{font-weight:700}.creator-field select{min-width:0;width:100%}.creator-preview{margin-top:18px;border:1px dashed #cddde4;border-radius:18px;padding:14px}.creator-preview>span{font-size:13px;font-weight:700;color:#57727f}.mini-train{display:flex;gap:7px;overflow-x:auto;margin-top:10px}.mini-wagon{width:62px;height:56px;flex:0 0 62px;border-radius:12px;background:#fff;border:2px solid #9bb5c2;display:grid;place-items:center}.mini-wagon .visual-emoji{font-size:34px}.mini-wagon .visual-shape{transform:scale(.65)}.success-dialog{text-align:center;padding:28px;max-width:560px}.success-burst{font-size:62px}.success-dialog h2{font-size:38px;margin:4px 0}.success-dialog>p{font-size:18px;color:#60747e}.explain-box{text-align:left;display:flex;gap:13px;background:#fff6d8;border-radius:18px;padding:15px 17px;margin:20px 0}.explain-box>span{font-size:28px}.explain-box p{margin:4px 0 0;color:#6d633f}.success-actions{display:flex;justify-content:center;gap:10px}.success-actions button{min-width:150px}
@media(max-width:1050px){.header-tools .tool-button span{display:none}.rail-scene{min-height:270px}.choice-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){.topbar{align-items:flex-start}.brand-icon{display:none}.brand p{display:none}.workspace{padding:12px}.mission-copy,.bottom-dock,.section-heading{align-items:stretch;flex-direction:column}.choice-grid{grid-template-columns:repeat(2,1fr)}.actions{width:100%}.actions button{flex:1}.section-heading p{display:none}.creator-grid{grid-template-columns:1fr}.wagon{width:94px;flex-basis:94px}.engine{flex-basis:94px}}@media(max-height:800px) and (min-width:1000px){.topbar{min-height:78px}.rail-scene{min-height:245px}.workspace{padding-top:12px}.wagon{height:92px}.choice-card{min-height:90px}}