:root{--bg:#f6f7fb;--card:#fff;--ink:#14182b;--muted:#5b6275;--line:#e3e6ef;--accent:#2f5bea;--accent-2:#9db3f5;--min:#e2553f;--good:#127a4b;--good-bg:#e6f5ee}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:860px;margin:0 auto;padding:28px 16px 40px}
a{color:var(--accent)}
.eyebrow{margin:0;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
h1{margin:.2em 0 .3em;font-size:clamp(1.7rem,5vw,2.4rem);line-height:1.15}
h2{margin:0 0 .4em;font-size:1.25rem}
.lead{margin:0 0 20px;color:var(--muted);max-width:60ch}
.muted{color:var(--muted);font-size:.92rem}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:18px}
form{display:grid;grid-template-columns:1fr auto 1fr auto;gap:10px;align-items:end}
label{display:flex;flex-direction:column;font-size:.85rem;font-weight:600;color:var(--muted);gap:4px;min-width:0}
input{font:inherit;color:var(--ink);padding:10px 12px;border:1px solid var(--line);border-radius:10px;width:100%;min-width:0;background:#fff}
input:focus{outline:2px solid var(--accent-2);border-color:var(--accent)}
button{font:inherit;cursor:pointer;border-radius:10px;border:1px solid var(--line);background:#fff;padding:10px 14px}
#go{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600}
button:disabled{opacity:.5;cursor:default}
#status{margin:12px 0 0}
.summary{margin:18px 0 8px;padding:12px 14px;border-radius:10px;background:var(--good-bg);color:var(--good);font-weight:500}
.summary b{color:var(--ink)}
.chart-wrap{width:100%;overflow:hidden}
#chart{width:100%;height:auto;display:block}
#chart text{font-size:12px;fill:var(--muted)}
#chart .val{fill:var(--ink);font-weight:600}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:.85rem;color:var(--muted);margin:6px 0 12px}
.sw{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-1px}
.sw-med{background:var(--accent)}.sw-p10{background:var(--ink);height:3px;vertical-align:3px}.sw-min{background:var(--min);border-radius:50%}
.table-wrap{width:100%;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.95rem;font-variant-numeric:tabular-nums}
th,td{padding:8px 6px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
th:first-child,td:first-child{text-align:left}
th{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-weight:600}
tr.best td{background:var(--good-bg);font-weight:600}
tr.best td:first-child::after{content:" · cheapest";color:var(--good);font-weight:500;font-size:.8rem}
.cta{display:inline-block;margin-top:14px;font-weight:600;text-decoration:none}
.bw-row{display:grid;grid-template-columns:110px 1fr 64px;gap:10px;align-items:center;padding:5px 0;font-size:.92rem}
.bw-bar{height:14px;border-radius:4px;background:var(--accent-2)}
.bw-row.best .bw-bar{background:var(--good)}
.bw-row.best{font-weight:600;color:var(--good)}
.bw-row span:last-child{text-align:right;font-variant-numeric:tabular-nums}
.note{font-size:.9rem;margin:10px 0 0}
.cta-card{background:linear-gradient(135deg,#1f3fb8,#2f5bea);color:#fff;border:0}
.cta-card p{color:#dfe6ff}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.btn{display:inline-block;padding:11px 16px;border-radius:10px;text-decoration:none;font-weight:600;background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);max-width:100%}
.btn.primary{background:#fff;color:#1f3fb8;border-color:#fff}
footer{font-size:.85rem;color:var(--muted);padding:6px 4px}
footer p{margin:.4em 0;overflow-wrap:anywhere}
@media (max-width:600px){
  form{grid-template-columns:1fr auto}
  form label:first-of-type{grid-column:1}
  #swap{grid-column:2;grid-row:1}
  form label:nth-of-type(2){grid-column:1/-1}
  #go{grid-column:1/-1}
  .bw-row{grid-template-columns:92px 1fr 52px;font-size:.85rem}
  th,td{padding:7px 4px;font-size:.88rem}
  .card{padding:16px}
  .obs{display:none}
  tr.best td:first-child::after{content:" ★"}
}