:root{--bg:#f6f7fb;--card:#fff;--ink:#1b1c2e;--muted:#6b6f85;--line:#e3e5ee;--brand:#4f46e5;--brand-ink:#fff;--ok:#16794c;--warn:#b45309;--bad:#b42318;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#12131c;--card:#1b1d2b;--ink:#eceef8;--muted:#9a9eb5;--line:#2c2f44;--brand:#818cf8;--brand-ink:#12131c;--ok:#4ade80;--warn:#fbbf24;--bad:#f87171}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif}
a{color:var(--brand)}
header{display:flex;gap:4px;align-items:center;flex-wrap:wrap;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
header .logo{font-weight:800;font-size:18px;margin-right:16px;color:var(--ink);text-decoration:none}
header a.nav{padding:6px 12px;border-radius:8px;text-decoration:none;color:var(--muted)}
header a.nav.on,header a.nav:hover{background:var(--bg);color:var(--ink)}
header .sp{flex:1}
main{max-width:1000px;margin:0 auto;padding:20px 16px 80px}
h1{font-size:24px;margin:8px 0 16px}h2{font-size:18px;margin:24px 0 10px}h3{font-size:15px;margin:0 0 6px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.sp{justify-content:space-between}
.muted{color:var(--muted)}.small{font-size:13px}
button,.btn{font:inherit;background:var(--brand);color:var(--brand-ink);border:0;border-radius:8px;padding:8px 14px;cursor:pointer;text-decoration:none;display:inline-block}
button.sec,.btn.sec{background:transparent;color:var(--ink);border:1px solid var(--line)}
button.danger{background:var(--bad);color:#fff}
button:disabled{opacity:.5;cursor:default}
input,select,textarea{font:inherit;color:inherit;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%}
input[type=checkbox],input[type=radio]{width:auto}
label{display:block;margin:10px 0 4px;font-size:13px;color:var(--muted)}
label.inl{display:flex;align-items:center;gap:8px;color:var(--ink);font-size:15px;margin:6px 0}
.badge{display:inline-block;font-size:12px;padding:2px 8px;border-radius:99px;border:1px solid var(--line);color:var(--muted)}
.badge.ok{color:var(--ok);border-color:var(--ok)}.badge.warn{color:var(--warn);border-color:var(--warn)}.badge.bad{color:var(--bad);border-color:var(--bad)}
.bar{height:6px;background:var(--line);border-radius:9px;overflow:hidden}.bar>i{display:block;height:100%;background:var(--brand)}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:12px;color:var(--muted);font-weight:600}
.err{color:var(--bad);margin:8px 0}
#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;opacity:0;transition:opacity .2s;pointer-events:none}
#toast.on{opacity:1}
.narrow{max-width:420px;margin:40px auto}
.code{font:600 18px ui-monospace,monospace;letter-spacing:.08em}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap}
.tabs a{padding:8px 14px;text-decoration:none;color:var(--muted);border-bottom:2px solid transparent}.tabs a.on{color:var(--ink);border-color:var(--brand)}
/* Player */
.player{display:grid;grid-template-columns:240px 1fr;gap:16px}
@media(max-width:760px){.player{grid-template-columns:1fr}}
.steps a{display:flex;gap:8px;padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--ink)}.steps a.on{background:var(--card);border:1px solid var(--line)}
.stage{position:relative;width:100%;aspect-ratio:16/9;background:#fff;border-radius:10px;overflow:hidden;border:1px solid var(--line);container-type:inline-size}
.stage .el{position:absolute;white-space:pre-wrap;overflow:hidden;line-height:1.2}
.stage .slide{position:absolute;inset:0}
.stage .slide.enter-fade{animation:fade .5s}.stage .slide.enter-slide{animation:slide .45s}.stage .slide.enter-zoom{animation:zoom .5s}
.a-fade{animation:fade .6s both}.a-rise{animation:rise .6s both}.a-zoom{animation:zoom .6s both}
@keyframes fade{from{opacity:0}}@keyframes slide{from{transform:translateX(100%)}}@keyframes zoom{from{transform:scale(.6);opacity:0}}@keyframes rise{from{transform:translateY(30px);opacity:0}}
.q{margin-bottom:18px}
.huntwrap{position:relative;display:inline-block;max-width:100%;cursor:crosshair}.huntwrap img{display:block;max-width:100%;border-radius:10px}
.pin{position:absolute;border:3px solid var(--ok);border-radius:50%;transform:translate(-50%,-50%);pointer-events:none}
.pin.hint{border-color:var(--warn);border-style:dashed;animation:fade 1s infinite alternate}
video{width:100%;border-radius:10px;background:#000}
.iframe16{aspect-ratio:16/9;width:100%;border:0;border-radius:10px}
/* Editor */
.editor{display:grid;grid-template-columns:150px 1fr 230px;gap:12px}
@media(max-width:900px){.editor{grid-template-columns:1fr}}
.thumbs button{display:block;width:100%;margin-bottom:6px;text-align:left}.thumbs button.on{outline:2px solid var(--brand)}
.stage.edit .el{cursor:move;outline:1px dashed transparent}.stage.edit .el:hover,.stage.edit .el.sel{outline-color:var(--brand)}