:root{color-scheme:dark;--bg:#0c1425;--panel:#142138;--ink:#edf3ff;--muted:#b9c7dc;--line:#3b4d68;--accent:#56b2ff;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}body{margin:0;padding:clamp(20px,5vw,64px) 18px;line-height:1.6}main{width:min(100%,640px);margin:0 auto}.brand{display:block;letter-spacing:.14em;font-size:.87rem;font-weight:750;text-decoration:none;margin-bottom:36px}.brand span{display:block;letter-spacing:0;font-weight:400;color:var(--muted)}h1{font-size:clamp(1.65rem,5vw,2.2rem);line-height:1.2;margin:0 0 16px;letter-spacing:-.035em}h2{font-size:1.16rem;margin:0 0 12px}p{margin:12px 0;color:var(--muted)}a{color:var(--accent);text-underline-offset:4px}section{border-top:1px solid var(--line);padding:24px 0}form{margin:18px 0}label{display:block;font-weight:550;margin:16px 0 6px}input,select,textarea{display:block;width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);font:inherit;min-width:0}textarea{resize:vertical;min-height:95px;overflow-wrap:anywhere}input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:3px}button,.action{display:inline-block;background:#126bb3;color:#fff;font:inherit;font-weight:650;border:1px solid transparent;border-radius:8px;padding:11px 18px;cursor:pointer;min-height:46px;margin:16px 8px 0 0;text-decoration:none}button:disabled{opacity:.55;cursor:wait}.secondary{background:transparent;color:var(--ink);border-color:var(--line)}.hint{font-size:.9rem}.show{display:flex;align-items:center;gap:9px;font-weight:400;font-size:.9rem}.show input{width:18px;height:18px;padding:0}.result{padding:14px;background:var(--panel);border-left:3px solid var(--accent);overflow-wrap:anywhere;white-space:pre-wrap}.error{color:#ffb6b1}footer{display:flex;gap:12px 22px;flex-wrap:wrap;margin-top:36px;padding-top:18px;border-top:1px solid var(--line);font-size:.9rem}#status:empty{display:none}.children{list-style:none;padding:0}.children li{padding:14px 0;border-bottom:1px solid var(--line)}.children button{display:block;margin-top:8px}@media(prefers-color-scheme:light){:root{color-scheme:light;--bg:#f5f7fb;--panel:#fff;--ink:#172b46;--muted:#455972;--line:#b6c5d7;--accent:#086db6}.error{color:#a71f24}}@media(max-width:380px){button,.action{width:100%;margin-right:0}}