:root{
  --bg:#f6f7fb;--card:#fff;--ink:#14161f;--muted:#5f6577;--line:#e4e7ef;
  --brand:#1d4ed8;--brand-ink:#fff;--accent:#f59e0b;--ok:#15803d;--warn:#b45309;
  --r:14px;--max:880px;
  --sub1:#0052A4;--sub2:#00A84D;--sub3:#EF7C1C;--sub4:#00A5DE;--sub5:#996CAC;--sub6:#CD7C2F;--sub7:#747F00;--sub8:#E6186C;--sub9:#BDB092;
}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f1117;--card:#181b24;--ink:#eef0f6;--muted:#9aa1b4;--line:#2a2f3d;--brand:#60a5fa;--brand-ink:#0b1020}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,"Helvetica Neue",Arial,sans-serif}
a{color:var(--brand)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
header.top{border-bottom:1px solid var(--line);background:var(--card);position:sticky;top:0;z-index:5}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;gap:12px}
.logo{font-weight:800;text-decoration:none;color:var(--ink);font-size:18px;letter-spacing:-.3px;display:flex;align-items:center;gap:8px}
.logo b{color:var(--brand)}
nav.main{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
nav.main::-webkit-scrollbar{display:none}
nav.main a{white-space:nowrap;text-decoration:none;color:var(--muted);font-size:14px;padding:6px 10px;border-radius:8px}
nav.main a.on,nav.main a:hover{background:var(--bg);color:var(--ink)}
main{padding:24px 0 48px}
h1{font-size:28px;line-height:1.2;margin:0 0 6px;letter-spacing:-.5px}
h2{font-size:20px;margin:28px 0 10px}
h3{font-size:16px;margin:18px 0 6px}
.lead{color:var(--muted);margin:0 0 20px;font-size:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin:14px 0}
.grid{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:640px){.grid.c2{grid-template-columns:1fr 1fr}.grid.c3{grid-template-columns:1fr 1fr 1fr}}
label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin:10px 0 4px}
input[type=number],input[type=time],input[type=text],select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);font-size:16px}
input[type=range]{width:100%;accent-color:var(--brand)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:end}
.row>*{flex:1 1 140px}
button,.btn{display:inline-block;padding:11px 16px;border-radius:10px;border:0;background:var(--brand);color:var(--brand-ink);font-weight:700;font-size:15px;cursor:pointer;text-decoration:none}
button.ghost,.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--line)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.chip{padding:7px 12px;border-radius:999px;border:1px solid var(--line);background:var(--card);font-size:14px;cursor:pointer;color:var(--ink)}
.chip.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.result{background:linear-gradient(135deg,var(--brand),#7c3aed);color:#fff;border-radius:var(--r);padding:20px;margin:14px 0}
.result .big{font-size:38px;font-weight:800;letter-spacing:-1px;line-height:1.1}
.result .sub{opacity:.9;font-size:14px;margin-top:4px}
.result .usd{font-size:16px;opacity:.9;margin-left:8px;font-weight:600}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:13px;color:var(--muted);font-weight:600}
td.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.tag{display:inline-block;padding:2px 8px;border-radius:6px;font-size:12px;font-weight:700;background:var(--bg);color:var(--muted)}
.tag.ok{background:#dcfce7;color:#166534}.tag.warn{background:#fef3c7;color:#92400e}.tag.bad{background:#fee2e2;color:#991b1b}
.note{font-size:13px;color:var(--muted);margin-top:10px}
.tools{display:grid;gap:12px;grid-template-columns:1fr 1fr}
@media(min-width:640px){.tools{grid-template-columns:repeat(3,1fr)}}
.tool{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;transition:transform .1s}
.tool:hover{transform:translateY(-2px);border-color:var(--brand)}
.tool .ic{font-size:28px}
.tool b{display:block;margin:8px 0 2px;font-size:15px}
.tool span{font-size:13px;color:var(--muted)}
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{cursor:pointer;font-weight:600}
.faq p{color:var(--muted);margin:8px 0 0;font-size:15px}
.line{display:inline-block;width:22px;height:22px;border-radius:50%;color:#fff;font-size:12px;font-weight:800;text-align:center;line-height:22px;margin-right:6px}
footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:13px}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:space-between}
footer a{color:var(--muted)}
.ad{min-height:90px;display:flex;align-items:center;justify-content:center;border:1px dashed var(--line);border-radius:var(--r);color:var(--muted);font-size:12px;margin:14px 0}
.pill-row{display:flex;gap:6px;flex-wrap:wrap}
.cmp{display:grid;gap:10px}
.opt{display:grid;grid-template-columns:1fr auto;gap:4px 12px;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px 14px;align-items:center}
.opt.best{border-color:var(--ok);box-shadow:0 0 0 2px #15803d22}
.opt b{font-size:15px}.opt .s{font-size:13px;color:var(--muted)}
.opt .f{font-size:20px;font-weight:800;text-align:right;white-space:nowrap}
.opt .f small{display:block;font-size:12px;font-weight:600;color:var(--muted)}
.timebar{display:flex;height:14px;border-radius:7px;overflow:hidden;margin:6px 0}
.timebar div{font-size:0}
.legend{display:flex;gap:12px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:middle}
kbd{background:var(--bg);border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:13px}
.status{font-size:28px;font-weight:800;margin:4px 0}
.status.ok{color:var(--ok)}.status.bad{color:#dc2626}.status.warn{color:var(--warn)}