:root{--bg:#fff;--fg:#0a0a0a;--mut:#5b6472;--pri:#0066ff;--line:#e5e7eb;--card:#f5f7fb}
@media (prefers-color-scheme:dark){:root{--bg:#0b1220;--fg:#eef1f6;--mut:#9aa6b8;--line:#1f2a3d;--card:#111a2c}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:24px 16px 64px}
.brand{font-weight:800;font-size:28px;letter-spacing:-1px;margin-bottom:12px}.brand b{color:var(--pri)}
h1{font-size:26px;margin:8px 0 12px}h2{font-size:18px;margin:24px 0 8px}h3{margin:0 0 6px;font-size:18px}
.muted{color:var(--mut)}.small{font-size:13px}
label{display:block;margin:12px 0;font-size:14px;color:var(--mut)}
input{display:block;width:100%;margin-top:4px;padding:12px;font:inherit;font-size:16px;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:8px}
button,.btn{display:inline-block;padding:12px 18px;font:inherit;font-weight:600;color:#fff;background:var(--pri);border:0;border-radius:8px;cursor:pointer;text-decoration:none;min-height:44px}
button.ghost{background:transparent;color:var(--pri);border:1px solid var(--pri)}button.link{background:none;color:var(--pri);padding:0;min-height:0;text-decoration:underline;font-weight:400}
.msg{color:#c62828;margin:8px 0}.cards{display:grid;gap:12px;margin:16px 0}
.card{display:block;padding:16px;background:var(--card);border:1px solid var(--line);border-radius:12px;color:inherit;text-decoration:none}.card span{color:var(--pri);font-weight:600}
table{width:100%;border-collapse:collapse;margin:12px 0;font-size:14px}th,td{padding:8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
tr.off{opacity:.55}code{font:14px ui-monospace,Menlo,monospace;background:var(--card);padding:2px 6px;border-radius:4px;word-break:break-all}
fieldset{border:1px solid var(--line);border-radius:8px;margin:12px 0}.chk{display:inline-block;margin:4px 12px 4px 0;color:var(--fg)}.chk input{display:inline;width:auto;margin-right:4px}
form.inline{display:flex;gap:6px;margin-bottom:6px}form.inline input{width:90px;margin:0;padding:8px}form.inline button{padding:8px 12px;min-height:0}
.result{border:2px solid var(--pri);border-radius:12px;padding:16px;margin:16px 0;background:var(--card)}
@media (max-width:600px){table{display:block;overflow-x:auto}}