:root {
  --bg: #0b0e14;
  --panel: #131722;
  --panel-border: #1f2534;
  --text: #e8eaf0;
  --text-dim: #8a91a5;
  --green: #16c784;
  --red: #ef4655;
  --accent: #5b8def;
  --amber: #e0a527;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Arial, sans-serif;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(14px + env(safe-area-inset-top)) 24px 14px;
  border-bottom: 1px solid var(--panel-border);
  background: var(--bg);
}

@media (max-width: 480px) {
  .topbar { padding-left: 16px; padding-right: 16px; flex-wrap: wrap; gap: 8px; }
  .brand h1 { font-size: 16px; }
  .disclaimer { margin: 12px 16px 0; font-size: 12px; }
  main { padding: 16px 16px 32px; }
  .grid { grid-template-columns: 1fr; gap: 12px; }
  .price { font-size: 24px; }
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0%   { opacity: 1; }
  50%  { opacity: 0.35; }
  100% { opacity: 1; }
}

.brand h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.status {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-dim);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.refresh-pill {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.disclaimer {
  margin: 14px 24px 0;
  padding: 10px 14px;
  background: rgba(224, 165, 39, 0.08);
  border: 1px solid rgba(224, 165, 39, 0.35);
  color: #e8c77a;
  border-radius: 8px;
  font-size: 12.5px;
  line-height: 1.5;
}

main {
  padding: 20px 24px 40px;
}

.exchange-section { margin-bottom: 28px; }

.exchange-section h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-dim);
  margin: 0 0 12px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 14px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 16px;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.card.flash-up { background: rgba(22, 199, 132, 0.08); border-color: rgba(22, 199, 132, 0.4); }
.card.flash-down { background: rgba(239, 70, 85, 0.08); border-color: rgba(239, 70, 85, 0.4); }

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-title { font-size: 15px; font-weight: 600; }

.card-sub {
  font-size: 11.5px;
  color: var(--text-dim);
  margin-top: 2px;
}

.arrow { font-size: 18px; }
.arrow.up { color: var(--green); }
.arrow.down { color: var(--red); }
.arrow.flat { color: var(--text-dim); }

.price-row {
  margin-top: 14px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.price {
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.currency {
  font-size: 12px;
  color: var(--text-dim);
}

.change-row {
  margin-top: 4px;
  display: flex;
  gap: 10px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.change-abs.up, .change-pct.up { color: var(--green); }
.change-abs.down, .change-pct.down { color: var(--red); }
.change-abs.flat, .change-pct.flat { color: var(--text-dim); }

.sparkline {
  display: block;
  width: 100%;
  height: 48px;
  margin-top: 12px;
}

.card-foot {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-dim);
}

.curve-row {
  display: flex;
  gap: 6px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--panel-border);
}

.curve-chip {
  flex: 1;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  padding: 6px 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.curve-label {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.curve-value {
  font-size: 12.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.curve-value.up { color: var(--green); }
.curve-value.down { color: var(--red); }

.curve-chip-unlisted {
  opacity: 0.45;
  background: transparent;
  border: 1px dashed var(--panel-border);
}
.curve-value.flat { color: var(--text-dim); }

.card-unavailable {
  opacity: 0.6;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 150px;
}

.unavailable-msg {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-top: 20px;
  line-height: 1.5;
}