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

:root {
  --bg: #f0f1f5;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --border: #e2e4ea;
  --border-light: #eef0f4;
  --text: #111827;
  --text-dim: #6b7280;
  --text-faint: #9ca3af;
  --accent: #e05a00;
  --accent2: #f97316;
  --accent-glow: rgba(234, 88, 12, 0.12);
  --header-bg: #111827;
  --header-text: #f9fafb;
  --radius: 14px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ---- Header ---- */
header {
  background: var(--header-bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 20% 100%, rgba(234,88,12,0.10) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 0%, rgba(99,102,241,0.08) 0%, transparent 50%);
  color: var(--header-text);
  padding: 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.4rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.brand-icon {
  color: var(--accent2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
header h1 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.header-sub {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  font-weight: 500;
  margin-top: 0.1rem;
  letter-spacing: 0.03em;
}
.header-meta {
  text-align: right;
}
.header-meta p {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.5;
}

/* ---- Explainer ---- */
.explainer {
  max-width: 1400px;
  margin: 0 auto 1.5rem;
  padding: 0 1.5rem;
}
.explainer p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
  max-width: 900px;
}
.explainer strong {
  color: var(--text);
  font-weight: 600;
}
.explainer-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1.5px solid var(--accent);
}
.explainer-link:hover {
  color: var(--accent);
}

/* ---- Main content wrapper ---- */
.top-row, .charts, .table-section, footer {
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ---- Top row: cards left, events right ---- */
.top-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
  align-items: stretch;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.section-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0;
  padding-left: 0.15rem;
}
/* When section-title is used standalone (not inside section-header) */
.top-col > .section-title {
  margin-bottom: 0.75rem;
}

/* ---- Period toggle ---- */
.period-toggle {
  display: flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
  gap: 1px;
}
.period-btn {
  background: transparent;
  border: none;
  border-radius: 6px;
  padding: 0.3rem 0.65rem;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  line-height: 1.2;
}
.period-btn:hover {
  color: var(--text);
  background: rgba(0,0,0,0.04);
}
.period-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* ---- Summary cards ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  flex: 1;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1rem 1.1rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0;
  transition: opacity 0.2s;
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.card:hover::before {
  opacity: 1;
}
.card-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
  letter-spacing: 0.06em;
}
.card-value {
  display: block;
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.card-desc {
  display: block;
  font-size: 0.68rem;
  color: var(--text-faint);
  margin-top: 0.35rem;
  line-height: 1.3;
}

/* ---- Events ---- */
.events-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.top-col {
  display: flex;
  flex-direction: column;
}
.events-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  max-height: 360px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.events-list::-webkit-scrollbar {
  width: 5px;
}
.events-list::-webkit-scrollbar-track {
  background: transparent;
}
.events-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
.events-list::-webkit-scrollbar-thumb:hover {
  background: var(--text-faint);
}
.events-loading {
  color: var(--text-faint);
  font-size: 0.82rem;
}
.event-card {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  background: var(--bg);
  border-left: 3px solid var(--border);
  transition: background 0.15s;
}
.event-card:hover {
  background: #e9eaef;
}
.event-card.severity-high { border-left-color: #dc2626; }
.event-card.severity-medium { border-left-color: #f59e0b; }
.event-badge {
  flex-shrink: 0;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: 5px;
  white-space: nowrap;
  margin-top: 0.15rem;
}
.event-badge.low_activity { background: #fef2f2; color: #dc2626; }
.event-badge.batch_bunching { background: #eff6ff; color: #2563eb; }
.event-badge.l1_gap { background: #fffbeb; color: #d97706; }
.event-badge.fee_spike { background: #ecfdf5; color: #059669; }
.event-badge.rpc_lag { background: #fef3c7; color: #92400e; }
.event-body {
  flex: 1;
  min-width: 0;
}
.event-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}
.event-detail {
  font-size: 0.73rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}
.event-time {
  font-size: 0.68rem;
  color: var(--text-faint);
  margin-top: 0.15rem;
}

/* ---- Charts ---- */
.charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}
.chart-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
.chart-box:hover {
  box-shadow: var(--shadow-md);
}
.chart-box h2 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
  color: var(--text-dim);
}

/* ---- Table ---- */
.table-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}
.table-section h2 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.85rem;
}
.table-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}
.table-controls button {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 1.1rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.15s;
}
.table-controls button:disabled {
  opacity: 0.35;
  cursor: default;
}
.table-controls button:not(:disabled):hover {
  background: var(--header-bg);
  color: #fff;
  border-color: var(--header-bg);
}
#table-info {
  font-size: 0.78rem;
  color: var(--text-faint);
  font-weight: 500;
}

.table-wrap {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}
th, td {
  padding: 0.55rem 0.7rem;
  text-align: right;
  white-space: nowrap;
}
th {
  border-bottom: 2px solid var(--border);
  color: var(--text-dim);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  background: var(--bg);
  position: sticky;
  top: 0;
}
td {
  border-bottom: 1px solid var(--border-light);
}
tbody tr {
  transition: background 0.1s;
}
tbody tr:nth-child(even) {
  background: rgba(0,0,0,0.015);
}
tbody tr:hover {
  background: var(--accent-glow);
}

/* ---- Payment button ---- */
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.45rem 1.1rem;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  transition: opacity 0.15s, transform 0.15s;
  display: none;
  box-shadow: 0 2px 8px rgba(234,88,12,0.25);
}
.btn-accent:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ---- Free banner ---- */
.free-banner {
  display: none;
  text-align: center;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  padding: 0.45rem 0;
}

/* ---- Payment modal ---- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}
.modal-overlay.active {
  display: flex;
}
.modal {
  background: var(--surface);
  border-radius: 16px;
  padding: 2rem 1.75rem;
  max-width: 380px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  position: relative;
  text-align: center;
}
.modal h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.modal p {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
}
.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-faint);
  line-height: 1;
  transition: color 0.15s;
}
.modal-close:hover {
  color: var(--text);
}
.invoice-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}
#modal-qr {
  display: block;
  margin: 0 auto;
}
.bolt11-hidden {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}
.invoice-box .btn-copy {
  display: inline-block;
  margin-top: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  border-radius: 8px;
  padding: 0.45rem 1.2rem;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  transition: opacity 0.15s;
}
.invoice-box .btn-copy:hover {
  opacity: 0.9;
}
.modal-status {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
}

/* ---- Spinner ---- */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 0.35rem;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 1.5rem 0 2rem;
  color: var(--text-faint);
  font-size: 0.78rem;
  font-weight: 500;
}
footer a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}
footer a:hover {
  color: var(--accent);
}
.footer-dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 0.4rem;
  opacity: 0.6;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .top-row { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .charts { grid-template-columns: 1fr; }
  .header-inner { flex-direction: column; gap: 0.75rem; text-align: center; }
  .header-meta { text-align: center; }
}
@media (max-width: 500px) {
  .cards { grid-template-columns: 1fr; }
  .header-brand { justify-content: center; }
}