:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #0b5fff;
  --gold: #b8860b;
  --warn-bg: #fff3cd;
  --warn-ink: #7a5c00;
  --border: #e3e3df;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
main { max-width: 640px; margin: 0 auto; padding: 20px 16px 48px; }
header { margin-bottom: 16px; }
h1 { font-size: 1.7rem; margin: 0; letter-spacing: -0.5px; }
h1 span { color: var(--accent); }
.tagline { margin: 4px 0 0; color: var(--muted); font-size: 0.95rem; }

.stale-banner {
  background: var(--warn-bg); color: var(--warn-ink);
  padding: 10px 12px; border-radius: 8px; font-size: 0.88rem; margin-bottom: 14px;
}

.lbl { display: block; font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--muted); margin: 14px 0 6px; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.card-chip {
  background: var(--card); border: 1.5px solid var(--border); border-radius: 10px;
  padding: 9px 6px; font-size: 0.82rem; font-weight: 600; cursor: pointer;
  color: var(--ink); text-align: center; line-height: 1.25;
}
.card-chip .bank { display: block; font-size: 0.66rem; font-weight: 500;
  color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.card-chip.selected { border-color: var(--accent); background: #eef3ff; }
.card-chip:active { transform: scale(0.98); }

#balance {
  width: 100%; font-size: 1.5rem; font-weight: 700; padding: 10px 14px;
  border: 1.5px solid var(--border); border-radius: 10px; background: var(--card);
  font-variant-numeric: tabular-nums;
}
#balance:focus { outline: none; border-color: var(--accent); }

.results { margin-top: 22px; }
.results-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.results-head h2 { font-size: 1rem; margin: 0; font-weight: 600; }
#share-btn {
  background: var(--accent); color: #fff; border: none; border-radius: 8px;
  padding: 8px 12px; font-size: 0.82rem; font-weight: 600; cursor: pointer; white-space: nowrap;
}

.route-list { list-style: none; padding: 0; margin: 12px 0 0; counter-reset: rank; }
.route {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 14px; margin-bottom: 10px; counter-increment: rank; position: relative;
}
.route:first-child { border-color: var(--gold); box-shadow: 0 1px 6px rgba(184,134,11,0.15); }
.route-top { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.route-top .prog { font-weight: 600; font-size: 0.95rem; }
.route-top .prog::before { content: counter(rank) ". "; color: var(--muted); font-weight: 500; }
.route-top .val { font-size: 1.25rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.route:first-child .val { color: var(--gold); }
.deriv { color: var(--muted); font-size: 0.82rem; margin-top: 3px; font-variant-numeric: tabular-nums; }
.cap-line { background: #fdeaea; color: #8a1f1f; font-size: 0.8rem; border-radius: 6px;
  padding: 6px 8px; margin-top: 7px; }
.gotchas { margin-top: 7px; display: flex; flex-wrap: wrap; gap: 5px; }
.gotcha { background: #f1f1ee; border-radius: 5px; padding: 3px 7px; font-size: 0.74rem;
  color: #444; }
.meta { margin-top: 8px; font-size: 0.7rem; color: var(--muted); line-height: 1.5; }
.meta a { color: var(--accent); }

.excluded { margin-top: 14px; font-size: 0.82rem; color: var(--muted); }
.excluded summary { cursor: pointer; }
.ex-row { padding: 5px 0 0 12px; }

footer { margin-top: 30px; font-size: 0.74rem; color: var(--muted); line-height: 1.5; }

@media (max-width: 420px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}