:root {
  --bg: #fafafa;
  --card-bg: #ffffff;
  --text: #1a1a1a;
  --text-muted: #666;
  --border: #e0e0e0;
  --accent: #e91e8c;
  --accent-dim: #f8e0ef;
  --green: #28a745;
  --red: #dc3545;
  --blue: #1565c0;
  --bar-bg: #e9ecef;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 24px;
}

header h1 {
  font-size: 1.8em;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.9em;
}

.subtitle a {
  color: var(--blue);
  text-decoration: none;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
}

.card h2 {
  font-size: 1.15em;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.stat-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.8em;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.stat-value {
  display: block;
  font-size: 1.5em;
  font-weight: 700;
}

.stat-value.accent { color: var(--accent); }
.stat-value.green { color: var(--green); }
.stat-value.blue { color: var(--blue); }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 0.8em;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

td:nth-child(2), td:nth-child(3), th:nth-child(2), th:nth-child(3) {
  text-align: right;
}

.bar-cell {
  width: 40%;
}

.mini-bar {
  background: var(--bar-bg);
  border-radius: 3px;
  height: 8px;
  overflow: hidden;
}

.mini-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--blue);
  transition: width 0.5s ease;
}

.mini-bar-fill.signal-bar {
  background: var(--accent);
}

.current-period td {
  font-weight: 600;
}

#signaling-section h3 {
  font-size: 0.95em;
  margin: 16px 0 8px;
  color: var(--text-muted);
}

.bar-container {
  background: var(--bar-bg);
  border-radius: 6px;
  height: 32px;
  overflow: hidden;
  margin-bottom: 8px;
}

.bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.5s ease;
}

#bip110-bar .bar-fill { background: var(--accent); }
#opreturn-bar .bar-fill { background: var(--blue); }

.bar-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.85em;
  color: var(--text-muted);
}

.block-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-bottom: 12px;
}

.block {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  cursor: default;
  position: relative;
}

.block.no-signal { background: var(--bar-bg); }
.block.signal { background: var(--accent); }

.block:hover::after {
  content: attr(title);
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75em;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

.block-stats {
  font-size: 0.9em;
  color: var(--text-muted);
}

.note {
  font-size: 0.85em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.loading {
  opacity: 0.5;
}

.error {
  color: var(--red);
  font-size: 0.9em;
}

.snapshot-notice {
  font-size: 0.8em;
  color: var(--text-muted);
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 4px;
  padding: 6px 10px;
  margin-top: 8px;
}

footer {
  text-align: center;
  padding: 20px 0;
  font-size: 0.85em;
  color: var(--text-muted);
}

footer a {
  color: var(--blue);
  text-decoration: none;
}

#sources ul {
  list-style: none;
  padding: 0;
}

#sources li {
  padding: 4px 0;
  font-size: 0.9em;
}

#sources a {
  color: var(--blue);
  text-decoration: none;
}

@media (max-width: 600px) {
  .container { padding: 12px; }
  header h1 { font-size: 1.4em; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .stat-value { font-size: 1.2em; }
  .block { width: 14px; height: 14px; }
}