:root{--bg:#fff8ef;--card:#fff;--tx:#2b2118;--mut:#7a6a5c;--ac:#e4572e;--bd:#ecdcc8;--ok:#2a9d5c}
@media(prefers-color-scheme:dark){:root{--bg:#1c1612;--card:#2a211b;--tx:#f5ebe0;--mut:#b8a898;--bd:#42352b}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--tx);font-family:"Hind Siliguri",system-ui,sans-serif;line-height:1.5}
.w{max-width:680px;margin:0 auto;padding:16px}h1{font-size:24px;margin:4px 0}h2{font-size:18px;margin:14px 0 8px}
.top{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;position:sticky;top:0;z-index:20;background:var(--bg);padding:8px 0;border-bottom:1px solid var(--bd)}.row{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.pts{background:var(--ac);color:#fff;padding:6px 14px;border-radius:99px;font-weight:700}
nav{display:flex;gap:6px;margin:14px 0;overflow-x:auto}nav a,nav button{flex:none;border:1px solid var(--bd);background:var(--card);color:var(--tx);padding:8px 14px;border-radius:99px;font:inherit;cursor:pointer;text-decoration:none}
nav .on{background:var(--tx);color:var(--bg)}
.card{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:14px;margin-bottom:12px}
.btn{background:var(--ac);color:#fff;border:0;border-radius:10px;padding:10px 18px;font:inherit;font-weight:600;cursor:pointer}.btn:disabled{opacity:.5}.g{background:var(--ok)}
input,textarea,select{width:100%;max-width:100%;padding:9px;margin:4px 0 8px;border:1px solid var(--bd);border-radius:8px;background:var(--bg);color:var(--tx);font:inherit}button,a{touch-action:manipulation}img,canvas{max-width:100%;height:auto}
.mut{color:var(--mut);font-size:14px}.tag{padding:2px 10px;border-radius:99px;font-size:13px;background:var(--bd)}.c{text-align:center}.hide{display:none}.err{color:#d33;font-weight:600}
.wb{position:relative;width:min(88vw,340px);margin:10px auto}canvas{width:100%;display:block;transition:transform 4.5s cubic-bezier(.12,.7,.1,1)}
.ptr{position:absolute;left:50%;top:-8px;transform:translateX(-50%);border:12px solid transparent;border-top:24px solid var(--tx);z-index:2}
#msg{min-height:26px;font-weight:600}