:root{--bg:#f7f7f8;--text:#1a1a1a;--muted:#666;--border:#d0d0d5;--accent:#1d4ed8;--error:#b91c1c;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#111214;--text:#ececef;--muted:#9a9aa2;--border:#3a3a40;--accent:#60a5fa;--error:#f87171}}body{margin:0}main{max-width:400px;margin:0 auto;padding:48px 16px}form,section{flex-direction:column;gap:12px;display:flex}label{flex-direction:column;gap:6px;font-weight:600;display:flex}input{font:inherit;border:1px solid var(--border);color:inherit;background:0 0;border-radius:8px;padding:10px 12px}button{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 12px}button:disabled{opacity:.5;cursor:default}button.link{color:var(--accent);background:0 0;padding:0}.links{justify-content:space-between;display:flex}.error{color:var(--error);margin:0}.hint{color:var(--muted);font-size:.9em}h2,p{margin:0}header{max-width:560px;margin:0 auto;padding:24px 16px 0}header h1{margin:0 0 12px}nav{border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:16px;padding-bottom:12px;display:flex}nav a{color:var(--muted);text-decoration:none}nav a.active{color:var(--text);font-weight:600}nav .hint{margin-left:auto}header+main{max-width:560px;padding-top:24px}h3{color:var(--muted);margin:16px 0 0;font-size:1em}a{color:var(--accent)}.card{border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:8px;padding:14px;display:flex}.card-head{justify-content:space-between;align-items:center;display:flex}.badge{border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:2px 8px;font-size:.8em}.badge-open{color:var(--accent);border-color:var(--accent)}.row{flex-wrap:wrap;gap:8px;display:flex}button.secondary{color:var(--text);border:1px solid var(--border);background:0 0}button.danger{color:var(--error)}fieldset{border:none;margin:0;padding:0}legend{margin-bottom:6px;font-weight:600}label.choice{flex-direction:row;align-items:flex-start;gap:8px;font-weight:400}label.choice input{margin-top:4px}label .hint{font-weight:400}button.result{text-align:left;color:var(--text);border:1px solid var(--border);background:0 0}button.result:hover{border-color:var(--accent)}