:root{
  --navy:#0A192F;        /* deep finance navy */
  --navy2:#102a4c;
  --gold:#D4AF37;        /* Fred-Perry gold */
  --gold-dk:#b9962e;
  --bg:#f6f7f9;          /* light paper */
  --paper:#ffffff;
  --line:#e6e8ee;
  --text:#1f2733;
  --muted:#6b7280;
  --pos:#0c7a4d;         /* readable green on light */
  --neg:#c0392b;         /* readable red on light */
  --serif:'Playfair Display',Georgia,'Times New Roman',serif;
  --sans:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--sans)}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--gold-dk)}

/* ---------- header ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:16px 28px;background:var(--navy);
  border-bottom:3px solid var(--gold);position:sticky;top:0;z-index:10}
.brand{display:flex;align-items:center;gap:11px}
.brand .logo{display:block;flex:0 0 auto}
.brand span{font-family:var(--serif);font-weight:700;font-size:1.5rem;
  color:var(--gold);letter-spacing:.3px}
.topbar nav a{margin-left:22px;color:#cdd6e4;font-weight:500;font-size:.95rem}
.topbar nav a:hover{color:var(--gold)}

/* ---------- layout ---------- */
.wrap{display:grid;grid-template-columns:1fr 320px;gap:30px;
  max-width:1180px;margin:0 auto;padding:32px 28px}
@media(max-width:900px){.wrap{grid-template-columns:1fr}}

h1{font-family:var(--serif);font-weight:700;font-size:2.3rem;line-height:1.18;
  color:var(--navy);margin:.1em 0 .35em}
h2{font-family:var(--serif);font-weight:600;font-size:1.4rem;color:var(--navy);margin:0 0 .55em}
h3{font-family:var(--serif);font-weight:600;color:var(--navy);margin:0 0 6px}
.lead{font-size:1.12rem;color:#3b4658;margin-top:0}
.muted{color:var(--muted);font-size:.92rem}
.crumbs{color:var(--muted);font-size:.86rem;margin-bottom:8px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--gold-dk)}

/* ---------- cards ---------- */
.card{background:var(--paper);border:1px solid var(--line);border-radius:12px;
  padding:20px 22px;margin:0 0 22px;box-shadow:0 1px 3px rgba(10,25,47,.05)}

/* ---------- tables ---------- */
table.rates{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
table.rates th{text-align:left;color:var(--navy);font-weight:600;font-size:.74rem;
  text-transform:uppercase;letter-spacing:.06em;padding:10px;
  border-bottom:2px solid var(--gold)}
table.rates td{padding:11px 10px;border-bottom:1px solid var(--line)}
table.rates.big td{padding:14px 10px}
table.rates tbody tr:hover td{background:#faf7ec}
.pos{color:var(--pos);font-weight:600}
.neg{color:var(--neg);font-weight:600}
.mini{font-size:.85rem;color:var(--muted);font-weight:600}
.mini:hover{color:var(--gold-dk)}

/* ---------- chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{display:inline-block;padding:6px 13px;border:1px solid var(--line);
  border-radius:999px;background:var(--paper);color:var(--navy);
  font-size:.85rem;font-weight:600}
.chip:hover{border-color:var(--gold);color:var(--gold-dk)}

/* ---------- CTA buttons (navy + gold, invert on hover) ---------- */
.cta{display:block;background:var(--navy);color:var(--gold);
  border:1px solid var(--gold);text-align:center;padding:11px 14px;
  border-radius:6px;margin:9px 0;font-weight:600;transition:all .25s}
.cta:hover{background:var(--gold);color:var(--navy);text-decoration:none}
.cta.small{display:inline-block;padding:6px 14px;font-size:.85rem;margin:0}
.cta .perk{display:block;font-weight:500;font-size:.76rem;opacity:.85;margin-top:2px}
.cta-row{display:flex;flex-wrap:wrap;gap:11px;margin-top:10px}
.cta-row .cta{flex:1;min-width:170px}

/* ---------- sidebar ---------- */
.sidebar .card{position:sticky;top:92px}
.cta-card{border-top:3px solid var(--gold)}
.ad{padding:8px;text-align:center}
.disclaimer{color:var(--muted);font-size:.78rem;margin-top:12px}

/* ---------- footer ---------- */
.footer{background:var(--navy);border-top:3px solid var(--gold);
  padding:28px;text-align:center;color:#aeb8c8;margin-top:10px}
.footer p{margin:5px 0}
.footer .muted{color:#7e8a9e}

ul{padding-left:1.15em}
li{margin:.32em 0}
code{background:#eef0f4;padding:1px 5px;border-radius:4px;font-size:.9em}

/* ---------- search box ---------- */
.searchbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
#coin-search{flex:1;min-width:200px;padding:11px 14px;font-size:1rem;font-family:var(--sans);
  border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--text)}
#coin-search:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(212,175,55,.18)}
#search-count{color:var(--muted);font-size:.85rem;white-space:nowrap}

/* ---------- back to top ---------- */
#to-top{display:none;position:fixed;right:18px;bottom:18px;z-index:20;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--gold);
  background:var(--navy);color:var(--gold);font-size:1.2rem;cursor:pointer;
  align-items:center;justify-content:center;box-shadow:0 3px 10px rgba(10,25,47,.25)}
#to-top:hover{background:var(--gold);color:var(--navy)}

/* ---------- tablet ---------- */
@media(max-width:900px){
  .sidebar .card{position:static}
}

/* ---------- mobile ---------- */
@media(max-width:600px){
  .topbar{flex-wrap:wrap;gap:10px;padding:12px 16px}
  .brand span{font-size:1.18rem}
  .topbar nav{width:100%;display:flex;justify-content:space-between;margin:0}
  .topbar nav a{margin-left:0;font-size:.85rem}
  .wrap{padding:18px 14px;gap:16px}
  h1{font-size:1.62rem}
  h2{font-size:1.2rem}
  .lead{font-size:1.02rem}
  .card{padding:16px 15px;border-radius:10px}
  /* horizontally scrollable tables instead of squished columns */
  table.rates{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap}
  .cta-row .cta{min-width:100%}
}