/* Original interface. No external fonts or network dependencies. */
:root{color-scheme:dark;--ink:#edf0de;--muted:#b0c7c5;--gold:#eac783;--teal:#91dacb;--panel:#102a30ed}*{box-sizing:border-box}body{margin:0;background:#0b2026;color:var(--ink);font-family:'Yu Gothic UI','Meiryo',sans-serif;font-size:15px;min-height:100vh}.backdrop{position:fixed;inset:0;background:linear-gradient(90deg,#081b20f0,#081b2080),url('assets/cavern.png') center/cover;z-index:-1}button,select,input{font:inherit}button{cursor:pointer;color:var(--ink);background:#1b3b42;border:1px solid #63807c;border-radius:8px;min-height:44px;padding:10px 16px;transition:background .15s}button:hover:not(:disabled){background:#31565b}button:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:3px}button:disabled{opacity:.48;cursor:default}.primary{background:var(--gold);border-color:var(--gold);color:#18272a;font-weight:bold}.primary:hover:not(:disabled){background:#ffe2a8}header{max-width:1160px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:24px 24px 10px;gap:12px}.brand{font-family:serif;color:var(--ink);font-size:24px;letter-spacing:.12em;text-decoration:none}.brand small{display:block;font:10px sans-serif;letter-spacing:.25em;color:var(--gold);margin-top:8px}main{max-width:1160px;margin:auto;padding:20px 24px}footer{max-width:1160px;margin:0 auto;padding:10px 24px 24px;color:var(--muted);display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px}footer button{font-size:12px;padding:6px 12px}h1,h2,h3{font-family:serif;font-weight:500;letter-spacing:.08em;margin:0 0 16px}h1{font-size:52px;line-height:1.4}h2{font-size:28px}h3{font-size:20px}p{line-height:1.85}.eyebrow{color:var(--gold);font-size:11px;letter-spacing:.22em;text-transform:uppercase}.intro{max-width:720px;padding:40px 0}.intro>p{max-width:530px;color:var(--muted)}.gear-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:24px 0}.gear{background:var(--panel);padding:22px;text-align:left;border:1px solid #789085}.gear strong{display:block;font:24px serif;color:var(--gold);margin-bottom:12px}.gear span{display:block;line-height:1.8;font-size:13px}.seed{display:flex;gap:12px;align-items:center}.seed select{padding:10px;background:#132d33;color:var(--ink);border:1px solid #63807c;border-radius:6px}.play-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}.play-head h2{margin:5px 0 0}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;min-width:300px}.stat{border-left:1px solid #77938b;padding:2px 12px}.stat small{display:block;color:var(--muted);font-size:11px}.stat b{font-size:25px;font-weight:500}.layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:22px}.board-wrap{background:#0c252ac9;border:1px solid #678980;border-radius:16px;padding:10px;position:relative}.map{aspect-ratio:1.2;position:relative;isolation:isolate}.map svg{position:absolute;width:100%;height:100%;inset:0;z-index:-1}.edge{stroke:#557270;stroke-width:1.3;stroke-dasharray:3 4}.rope{stroke:var(--gold);stroke-width:3;fill:none;stroke-linejoin:round;stroke-linecap:round;filter:drop-shadow(0 0 3px #eac78350)}.node{position:absolute;transform:translate(-50%,-50%);width:50px;height:49px;min-height:0;padding:2px;border:1px solid #63877f;border-radius:10px;background:#19373cf5;display:flex;align-items:center;justify-content:center;flex-direction:column;font-size:12px;gap:0}.node small{font-size:10px;color:#c4d5d1}.node.sample{background:#28464a url('assets/crystal.png') center/cover}.node.sample span{background:#10292edb;padding:1px 3px;border-radius:3px}.node.gem{border-color:var(--gold)}.node.water{border-style:dashed;background:#143d51}.node.rough{background:#3c3935}.node.here{outline:3px solid var(--gold);outline-offset:3px;background:#936e34;color:white}.node.reachable{border-color:#b4f7df;box-shadow:0 0 0 1px #9cccb6}.node.selected{box-shadow:0 0 0 3px #fff}.node:disabled{opacity:.7}.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--muted);padding:12px 6px 2px}.legend b{color:var(--gold);font-weight:normal}.side{display:flex;flex-direction:column;gap:12px}.panel{background:var(--panel);border:1px solid #4d6b65;border-radius:12px;padding:18px}.panel p{margin:8px 0;font-size:13px}.muted{color:var(--muted)}.warning{color:#ffd29f}.route{font-size:14px;color:var(--teal)}.actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.actions .wide{grid-column:1/-1}.log{font-size:12px;line-height:1.7;margin:0;padding-left:18px;color:var(--muted)}.log li:first-child{color:var(--ink)}.objective{display:flex;justify-content:space-between;margin-bottom:10px;color:var(--gold);font-size:14px}.statusline{min-height:28px;font-size:13px;padding:8px 4px;color:var(--teal)}dialog{max-width:min(550px,calc(100vw - 28px));max-height:85vh;overflow:auto;background:#122d33;color:var(--ink);border:1px solid #769489;border-radius:14px;padding:26px;box-shadow:0 20px 80px #0008}dialog::backdrop{background:#001014be}dialog p{font-size:14px}dialog button{margin:5px}dialog label{display:block;margin:20px 0}dialog input[type=range]{width:100%;accent-color:var(--gold)}#notice{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:#eac783;color:#172a2d;padding:12px 20px;border-radius:8px;max-width:90vw;display:none;z-index:10}.end{max-width:700px;padding:40px 0}.score{font:64px serif;color:var(--gold)}.recap{width:100%;border-collapse:collapse;margin:20px 0}.recap td,.recap th{text-align:left;padding:12px 8px;border-bottom:1px solid #668078;font-size:13px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:24px}.steps div{border-top:1px solid #708b80;padding:12px 0;font-size:12px;line-height:1.7}.steps b{display:block;color:var(--gold);font-size:15px}.fade{animation:enter .4s ease-out}@keyframes enter{from{opacity:.2;transform:translateY(7px)}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}@media(max-width:760px){header{padding:18px 14px 8px}.brand{font-size:20px}main{padding:15px 14px}.layout{grid-template-columns:1fr;gap:12px}.play-head{display:block}.stats{min-width:0;margin-top:18px}.side{display:grid;grid-template-columns:1fr 1fr;gap:10px}.side .panel:last-child{grid-column:1/-1}.panel{padding:14px}.map{aspect-ratio:1.1;max-height:470px}.node{width:44px;height:44px;font-size:11px}.intro{padding:20px 0}h1{font-size:40px}.gear{padding:16px}.gear strong{font-size:21px}.gear span{font-size:12px}footer{padding:10px 14px 24px}.statusline{min-height:46px}}@media(max-width:420px){.side{display:flex}.gear-grid{grid-template-columns:1fr}.steps{gap:12px}.steps div{font-size:11px}.node{width:40px;height:42px}.map{aspect-ratio:1}.brand small{font-size:8px}.stat{padding:2px 10px}.stat b{font-size:23px}h1{font-size:34px}header>button{padding:8px 10px}.legend{font-size:10px;gap:7px}.play-head h2{font-size:25px}}
.edge,.rope{vector-effect:non-scaling-stroke}.edge{stroke-dasharray:3 5}.map{background:radial-gradient(ellipse at center,#31534c25,transparent 70%)}
@media(min-width:761px){.map{aspect-ratio:1.55}.panel{padding:14px}.play-head{margin-bottom:12px}header{padding-top:16px}main{padding-top:12px}.log{font-size:11px}}
@media(min-width:761px){.map{aspect-ratio:1.9}.log{max-height:60px;overflow:auto}.panel h3{font-size:18px;margin-bottom:10px}.panel p{line-height:1.6}}

.intro .board-wrap{max-width:540px;margin:20px 0}.intro h2{font-size:22px;margin-top:24px}.intro .node:disabled{opacity:1}.node.sample small{background:#10292edb}summary{cursor:pointer;font-size:13px;min-height:32px}.score small{font:14px sans-serif}