:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #2d333b;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #10b981;
  --accent-2: #f59e0b;
  --accent-3: #ef4444;
  --gold: #d4af37;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

.promo-banner {
  display: flex;
  align-items: stretch;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}
.promo-banner .stripe {
  flex: 1 1 auto;
  min-width: 28px;
  background: repeating-linear-gradient(-45deg, var(--gold) 0 18px, #12100a 18px 36px);
  animation: stripe-scroll 14s linear infinite;
}
.banner-center {
  flex: 0 0 auto;
  padding: 12px 22px;
  background: var(--bg);
  color: var(--text);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}
.banner-center strong { color: var(--gold); }
.promo-banner:hover .banner-center strong { text-shadow: 0 0 14px rgba(212, 175, 55, 0.6); }
@keyframes stripe-scroll {
  to { background-position: 51px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .promo-banner .stripe { animation: none; }
}
@media (max-width: 560px) {
  .banner-center { font-size: 0.78rem; padding: 10px 12px; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
}

.muted { color: var(--muted); }
code { font-family: var(--mono); font-size: 0.85em; }

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand h1 { margin: 0; font-size: 1.25rem; font-weight: 650; }
.brand .sub { font-size: 0.8rem; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #066b4f);
  box-shadow: 0 0 24px rgba(16, 185, 129, 0.35);
}

.header-stats { display: flex; gap: 10px; }
.pill {
  display: flex; flex-direction: column; align-items: flex-end;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 14px;
}
.pill-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.pill-value { font-family: var(--mono); font-size: 1.05rem; font-weight: 600; }
.pill-delta { font-family: var(--mono); font-size: 0.75rem; font-weight: 600; }
.pill-delta.down { color: var(--accent); }
.pill-delta.up { color: var(--accent-3); }
.pill-delta.flat { color: var(--muted); }

a.pill-cta { text-decoration: none; border-color: rgba(212, 175, 55, 0.45); }
.pill-cta .pill-value { color: var(--gold); font-size: 0.95rem; }
a.pill-cta:hover { border-color: var(--gold); box-shadow: 0 0 18px rgba(212, 175, 55, 0.25); }

main { max-width: 1080px; margin: 0 auto; padding: 24px; display: grid; gap: 20px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 720px) { .cards { grid-template-columns: 1fr; } }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; inset: 0 auto 0 0; width: 4px;
  background: var(--accent);
}
.card[data-tier="fast"]::before { background: var(--accent-2); }
.card[data-tier="rapid"]::before { background: var(--accent-3); }
.card h2 { margin: 0 0 6px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); font-weight: 600; }
.card-gwei { font-size: 1.9rem; font-weight: 700; font-family: var(--mono); }
.card-gwei small { font-size: 0.85rem; color: var(--muted); margin-left: 6px; font-weight: 400; }
.card-detail { font-size: 0.8rem; font-family: var(--mono); }
.card-meta { display: flex; justify-content: space-between; margin-top: 8px; font-size: 0.9rem; font-weight: 600; }
.card-meta .muted { font-weight: 400; font-size: 0.8rem; }

.refresh-note { text-align: center; font-size: 0.8rem; margin: 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
}
.panel h3 { margin: 0 0 12px; font-size: 1rem; }
.panel-sub { margin: -8px 0 12px; font-size: 0.8rem; }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.panel-head h3 { margin: 0; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
td, th:nth-child(n+3) { font-family: var(--mono); }
td:first-child { font-family: inherit; }
tbody tr:last-child td { border-bottom: none; }

.range-switch { display: flex; gap: 6px; }
.range-switch button {
  background: transparent; color: var(--muted);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 5px 12px; font-size: 0.8rem; cursor: pointer;
}
.range-switch button.active {
  background: rgba(16, 185, 129, 0.12); color: var(--accent);
  border-color: rgba(16, 185, 129, 0.4);
}
.chart-wrap { height: 300px; }

footer {
  max-width: 1080px; margin: 0 auto; padding: 16px 24px 32px;
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between;
  font-size: 0.78rem; border-top: 1px solid var(--border);
}