:root{
  --paper:#ECEEF5; --card:#FFFFFF; --ink:#161A33; --muted:#5F6584; --line:#D9DCE8;
  --lantern:#D7263D; --dusk:#3D3478; --night:#191A46; --exit:#FFD100;
  --me:#191A46; --meink:#FFFFFF; --shadow:0 1px 0 rgba(22,26,51,.06),0 8px 24px -12px rgba(22,26,51,.25);
  --jp:"Zen Kaku Gothic New",system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","PingFang SC","Noto Sans SC","PingFang TC","Noto Sans TC","Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif;
  --display:"Dela Gothic One","Zen Kaku Gothic New",system-ui,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--paper:#0F1128;--card:#1A1D3D;--ink:#EEF0FA;--muted:#A3A8C6;--line:#2B2F57;--me:#ECE8FF;--meink:#191A46;--shadow:0 1px 0 rgba(0,0,0,.2),0 10px 28px -14px rgba(0,0,0,.7)}
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--paper);color:var(--ink);font:16px/1.6 var(--jp);display:flex;flex-direction:column;height:100dvh;overflow:hidden;-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid #7FB2FF;outline-offset:2px}

/* ---------- Escena ---------- */
#hero{container-type:size;position:relative;flex:none;height:clamp(250px,46vh,440px);overflow:hidden;background:var(--night);transition:height .7s cubic-bezier(.6,0,.2,1)}
.scene{position:absolute;inset:0;width:100%;height:100%}
/* Pantallas anchas: la escena entera en el centro y el cielo/río continúan a los lados */
@container (min-aspect-ratio:400/235){
  .scene{background:none}
}
@media (min-width:700px){
  #hero{background:linear-gradient(#191A46 0%,#3D3478 31%,#9C5A86 52%,#F08A6C 70.6%,#3A2F66 70.6%,#141434 100%)}
}
@container (min-aspect-ratio:400/235){
  .scene{left:50%;width:calc(100cqh * 400 / 220);transform:translateX(-50%);-webkit-mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent)}
  body.chatting .scene{left:0;width:100%;transform:none;-webkit-mask-image:none;mask-image:none}
}
body.chatting #hero{height:76px}
.hero-top{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;padding:calc(10px + env(safe-area-inset-top)) 16px 0;z-index:2}
.brand{display:flex;align-items:center;gap:8px;color:#fff;font-weight:700;font-size:15px;letter-spacing:.02em;opacity:0;transition:opacity .4s}
.brand b{font-family:var(--display);font-weight:400;font-size:17px}
body.chatting .brand{opacity:1}
.hbtns{display:flex;gap:6px}
.hbtn{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);color:#fff;border-radius:999px;min-width:38px;height:34px;padding:0 12px;cursor:pointer;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.hero-title{position:absolute;left:20px;right:20px;top:calc(56px + env(safe-area-inset-top));color:#fff;z-index:1;transition:opacity .35s,transform .5s}
.hero-title h1{margin:0;font:400 clamp(44px,13vw,76px)/1 var(--display);letter-spacing:.02em;text-shadow:0 4px 24px rgba(25,26,70,.55)}
.hero-title h1 span{display:inline-block;opacity:0;transform:translateY(18px) rotate(-4deg);animation:char .7s cubic-bezier(.2,.9,.3,1.3) forwards}
.hero-title p{margin:10px 0 0;font-size:15px;font-weight:500;opacity:0;animation:fade .8s .9s forwards;max-width:30ch;text-shadow:0 1px 10px rgba(25,26,70,.8)}
body.chatting .hero-title{opacity:0;transform:translateY(-20px);pointer-events:none}

/* animaciones de la escena */
.star{fill:#fff;animation:twinkle 3.4s ease-in-out infinite}
.win{fill:#FFCF5C;opacity:.85}
.win.f1{animation:flick 6s infinite}.win.f2{animation:flick 9s 2s infinite}.win.f3{animation:flick 7s 4s infinite}.win.f4{animation:flick 11s 1s infinite}
.beacon{fill:#FF4D5E;animation:blink 1.8s steps(1) infinite}
.beacon.halo{opacity:.35}
.train{animation:ride 15s linear infinite}
.boat{animation:sail 38s linear infinite}
.glint{animation:shimmer 4.5s ease-in-out infinite}
.lantern{transform-box:view-box;transform-origin:296px 0;animation:sway 4.8s ease-in-out infinite alternate}
.win{animation-play-state:running}
.scene .wins{opacity:0;animation:lights 1.6s .5s forwards}
@keyframes char{to{opacity:1;transform:none}}
@keyframes fade{to{opacity:1}}
@keyframes twinkle{0%,100%{opacity:.25}50%{opacity:1}}
@keyframes flick{0%,40%,100%{opacity:.85}45%,60%{opacity:.1}}
@keyframes blink{0%{opacity:1}50%{opacity:.15}}
@keyframes ride{from{transform:translateX(-190px)}to{transform:translateX(420px)}}
@keyframes sail{from{transform:translateX(420px)}to{transform:translateX(-60px)}}
@keyframes shimmer{0%,100%{opacity:.25;transform:translateX(0)}50%{opacity:.9;transform:translateX(5px)}}
@keyframes sway{from{transform:rotate(-4deg)}to{transform:rotate(4deg)}}
@keyframes lights{to{opacity:1}}

/* ---------- Conversación ---------- */
#log{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:18px 16px 24px;display:flex;flex-direction:column;gap:14px;scroll-behavior:smooth}
#log>*{flex-shrink:0;width:100%;max-width:680px;margin-left:auto;margin-right:auto}
.welcome h2{font:700 22px/1.3 var(--jp);margin:2px 0 6px}
.welcome .sub{margin:0 0 18px;color:var(--muted);max-width:40ch}
.welcome h3{font-size:14px;font-weight:700;color:var(--muted);margin:0 0 10px}

/* Carteles de estación (駅名標) */
.signs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
@media (min-width:560px){.signs{grid-template-columns:repeat(4,minmax(0,1fr))}}
.sign{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 8px 22px;cursor:pointer;box-shadow:var(--shadow);overflow:hidden;opacity:0;transform:perspective(400px) rotateX(-80deg);transform-origin:top;animation:flip .6s cubic-bezier(.2,.8,.3,1.2) forwards;transition:transform .2s}
.sign:active{transform:scale(.97)}
.sign-jp{font-weight:700;font-size:22px;line-height:1.2;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.sign-ro{font-size:13px;color:var(--muted);line-height:1.3}
.sign-band{position:absolute;left:0;right:0;bottom:0;height:9px;background:var(--c)}
.sign .code{position:absolute;top:8px;right:8px}
@keyframes flip{to{opacity:1;transform:none}}

.code{display:inline-flex;box-sizing:border-box;flex-direction:column;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;border:3.5px solid var(--c);background:#fff;color:#161A33;font:700 9px/1 var(--jp);flex:none}
.code b{font-size:11px;line-height:1}

/* Mensajes */
.msg{overflow-wrap:anywhere}
.me{align-self:flex-end;width:auto!important;max-width:85%!important;margin-right:0!important;background:var(--me);color:var(--meink);padding:9px 16px;border-radius:20px 20px 6px 20px;white-space:pre-wrap;animation:pop .35s cubic-bezier(.2,.9,.3,1.2)}
.bot{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 16px;box-shadow:var(--shadow);animation:fade .4s}
.bot h2{font-size:16px;margin:16px 0 4px;display:flex;align-items:center;gap:6px}
.bot h2:first-child{margin-top:0}
.bot p{margin:4px 0}
.bot ul{margin:4px 0;padding-left:20px}
.bot li{margin:3px 0}
.bot.detail{border-top:4px solid var(--dusk)}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.96)}}

/* Carga: tren sobre la vía */
.loading{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow)}
.track{position:relative;height:34px;margin-bottom:8px}
.track svg{width:100%;height:100%;overflow:visible}
.track .rail{stroke:var(--line);stroke-width:3;stroke-linecap:round}
.track .rail-on{stroke:var(--lantern);stroke-width:3;stroke-linecap:round;stroke-dasharray:1000;stroke-dashoffset:1000;animation:draw 6s ease-out forwards}
.track .mini{animation:run 6s ease-out forwards}
.track .stop{fill:var(--card);stroke:var(--ink);stroke-width:2.5}
.lmsg{margin:0;color:var(--muted);font-size:14px;transition:opacity .25s}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes run{from{left:0}to{left:calc(100% - 26px)}}

/* ---------- Tarjeta de viaje ---------- */
.trip{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden;animation:fade .4s}
.ttabs{display:flex;gap:6px;padding:12px 12px 0;overflow-x:auto;scrollbar-width:none}
.ttabs::-webkit-scrollbar{display:none}
.ttab{flex:none;border:1px solid var(--line);background:transparent;border-radius:12px;padding:6px 12px;cursor:pointer;text-align:left;line-height:1.25}
.ttab small{display:block;font-size:11px;color:var(--muted)}
.ttab strong{font-size:14px}
.ttab.on{background:var(--dusk);border-color:var(--dusk);color:#fff}
.ttab.on small{color:#D9D4FF}
.tsum{display:flex;align-items:flex-end;gap:18px;padding:14px 16px 6px;flex-wrap:wrap}
.tsum .big{font:400 46px/1 var(--display)}
.tsum .big small{font:700 15px var(--jp);margin-left:4px}
.tsum .facts{display:flex;flex-direction:column;font-size:14px;color:var(--muted);padding-bottom:4px}
.tsum .facts b{color:var(--ink)}
.ttime{padding:0 16px;font-size:13px;color:var(--muted)}

ol.ribbon{list-style:none;margin:10px 0 0;padding:6px 16px 16px 16px;position:relative}
.ribbon li{position:relative;padding:0;opacity:0;animation:rise .45s forwards;animation-delay:calc(var(--i) * 110ms)}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.ribbon .node{display:flex;align-items:center;gap:12px;min-height:44px}
.ribbon .node .dot{flex:none;width:34px;display:flex;justify-content:center;position:relative;z-index:1}
.ribbon .node .dot i{display:block;width:18px;height:18px;border-radius:50%;background:var(--card);border:4px solid var(--ink)}
.ribbon .node.end .dot i{background:var(--lantern);border-color:var(--lantern);box-shadow:0 0 0 5px rgba(215,38,61,.18)}
.ribbon .node.start .dot i{background:#1E8E5A;border-color:#1E8E5A}
.ribbon .sname{font-weight:700;font-size:17px;line-height:1.25}
.ribbon .sname small{display:block;font-weight:500;font-size:12px;color:var(--muted)}
.ribbon .seg{padding:6px 0 12px 46px}
.ribbon .seg::before{content:"";position:absolute;left:14px;top:-8px;bottom:-8px;width:6px;border-radius:3px;background:var(--c);transform-origin:top;transform:scaleY(0);animation:grow .6s forwards;animation-delay:calc(var(--i) * 110ms + 120ms)}
.ribbon .seg.walk::before{width:0;left:16px;background:none;border-left:3px dotted var(--muted)}
.ribbon .seg.thru::before{background:repeating-linear-gradient(var(--c) 0 10px,var(--c2) 10px 20px)}
@keyframes grow{to{transform:scaleY(1)}}
.lname{font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.lname .chip{display:inline-block;padding:1px 9px;border-radius:999px;background:var(--c);color:#fff;font-size:12px;font-weight:700;text-shadow:0 0 2px rgba(0,0,0,.35)}
.lmeta{font-size:14px;color:var(--muted);margin-top:2px}
.lmeta b{color:var(--ink)}
.walkline{font-size:14px;color:var(--muted);padding:6px 0}
.gate{display:inline-flex;align-items:center;gap:6px;margin-top:4px;padding:2px 10px;border-radius:6px;font-size:13px;font-weight:700}
.gate.in{border:2px solid var(--ink)}
.gate.out{background:var(--exit);color:#161A33}
.gate.out::before{content:"出口";font-size:11px;padding:0 5px;background:#161A33;color:var(--exit);border-radius:3px}
.gate.in::before{content:"入口";font-size:11px;padding:0 5px;background:var(--ink);color:var(--card);border-radius:3px}
.note{display:inline-block;margin-top:6px;font-size:13px;padding:3px 10px;border-radius:8px;background:rgba(61,52,120,.1);color:var(--ink)}
.warn{color:#B4231F}
@media (prefers-color-scheme:dark){.warn{color:#FF8A80}.note{background:rgba(236,232,255,.1)}}

/* Diagrama del tren */
.cars{display:flex;align-items:center;gap:3px;margin-top:8px}
.cars .nose{width:10px;height:14px;border-radius:7px 2px 2px 7px;background:var(--line)}
.cars i{display:block;width:clamp(14px,6vw,22px);height:14px;border-radius:3px;background:var(--line)}
.cars i.on{background:var(--c);box-shadow:0 0 0 2px var(--card),0 0 0 4px var(--c);animation:beat 1.6s ease-in-out 3}
.carcap{font-size:12px;color:var(--muted);margin-top:4px}
@keyframes beat{50%{transform:translateY(-3px)}}

/* Pulso que recorre la cinta una vez */
.ribbon .pulse{position:absolute;left:26px;top:10px;width:14px;height:14px;margin-left:-1px;border-radius:50%;background:#fff;box-shadow:0 0 0 4px var(--lantern),0 0 18px 6px rgba(215,38,61,.55);animation:travel 2.6s .6s cubic-bezier(.5,0,.3,1) forwards;opacity:0;padding:0}
@keyframes travel{0%{opacity:1;top:10px}92%{opacity:1}100%{opacity:0;top:calc(100% - 34px)}}

.tbar{display:flex;gap:8px;padding:0 16px 16px}
.mbar{display:flex;gap:8px;overflow-x:auto;padding:0 12px 14px;scrollbar-width:none}
.mbar::-webkit-scrollbar{display:none}
.mbar .tbtn{flex:none;padding:7px 12px;font-size:13px}
.tbtn{border:1px solid var(--line);background:var(--paper);border-radius:999px;padding:8px 14px;font-size:14px;cursor:pointer;text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.tbtn.on{background:#1A73E8;border-color:#1A73E8;color:#fff}
.mapwrap{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s cubic-bezier(.6,0,.2,1)}
.mapwrap.open{grid-template-rows:1fr}
.mapwrap>div{overflow:hidden}
.map{height:300px;margin:0 12px 10px;border-radius:14px;background:var(--paper)}
.trip.big .map{height:68vh}
.mapnote{font-size:12px;color:var(--muted);padding:0 16px 10px}
.gwlabel{background:#fff;color:#161A33;border:2px solid #161A33;border-radius:6px;padding:1px 6px;font-weight:700;font-size:12px;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.gwlabel.exit{background:#FFD100;border-color:#161A33}
.gwlabel::before{display:none}

/* ---------- Barra de escritura ---------- */
#status{font-size:13px;color:var(--muted);padding:0 16px;text-align:center}
#status:empty{display:none}
#chips{display:none;gap:8px;overflow-x:auto;padding:8px 16px 0;scrollbar-width:none}
#chips::-webkit-scrollbar{display:none}
body.chatting #chips{display:flex}
.chip-s{flex:none;display:inline-flex;align-items:center;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:5px 12px 5px 6px;font-size:14px;cursor:pointer}
.chip-s i{width:10px;height:10px;border-radius:50%;background:var(--c)}
form{flex:none;display:flex;gap:8px;align-items:flex-end;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:var(--paper)}
.compose{flex:1;display:flex;align-items:flex-end;background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:4px}
textarea{flex:1;resize:none;border:0;background:transparent;color:var(--ink);padding:9px 10px;font:inherit;max-height:120px;outline:none}
textarea::placeholder{color:var(--muted)}
.ibtn{flex:none;width:40px;height:40px;border-radius:50%;border:0;background:transparent;display:grid;place-items:center;cursor:pointer;color:var(--muted)}
.ibtn svg{width:22px;height:22px}
.ibtn.on{background:var(--dusk);color:#fff}
#send{width:48px;height:48px;background:var(--lantern);color:#fff;border:0;box-shadow:0 6px 18px -6px rgba(215,38,61,.8)}
#send:active{transform:scale(.94)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.001s!important}
  .train,.boat{animation:none}
}
.tto{padding:12px 16px 0;font-size:13px;color:var(--muted)}
.tto b{color:var(--ink)}

/* Selector de idioma */
.sheet-bg{position:fixed;inset:0;z-index:50;background:rgba(16,18,40,.45);display:flex;align-items:flex-end;justify-content:center;animation:fade .2s}
.sheet-bg.out{opacity:0;transition:opacity .2s}
.sheet{width:100%;max-width:520px;background:var(--card);color:var(--ink);border-radius:22px 22px 0 0;padding:18px 16px calc(20px + env(safe-area-inset-bottom));box-shadow:0 -10px 40px rgba(0,0,0,.3);animation:up .3s cubic-bezier(.2,.9,.3,1)}
.sheet h2{font-size:17px;margin:0 0 12px}
.langs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.langb{border:1px solid var(--line);background:var(--paper);border-radius:12px;padding:12px;font-size:16px;cursor:pointer;text-align:left}
.langb.on{background:var(--dusk);border-color:var(--dusk);color:#fff}
@keyframes up{from{transform:translateY(100%)}}
@media (min-width:600px){.sheet-bg{align-items:center}.sheet{border-radius:22px}}