:root {
  color-scheme: dark;
  --bg: #0f141b;
  --panel: #19212b;
  --panel-border: #273140;
  --text: #dce4ee;
  --muted: #98a5b7;
  --accent: #66c0f4;
  --accent-strong: #8ed2ff;
  --chip-bg: #243042;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #16202c 0%, var(--bg) 45%);
  color: var(--text);
  font-family: Inter, Segoe UI, Roboto, sans-serif;
}

.site-footer {
  width: min(1200px, 95vw);
  margin: 0 auto 24px;
  color: var(--muted);
  font-size: 0.82rem;
  display: grid;
  gap: 4px;
}

.site-footer p {
  margin: 0;
}

.app {
  width: min(1200px, 95vw);
  margin: 24px auto 40px;
  display: grid;
  gap: 14px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  margin: 0;
  font-size: 1.8rem;
}

.header p {
  margin: 4px 0 0;
  color: var(--muted);
}

.status-chip {
  background: var(--chip-bg);
  border: 1px solid var(--panel-border);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
}

.panel {
  background: linear-gradient(180deg, #1c2530, var(--panel));
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 14px;
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.field-group {
  display: grid;
  gap: 6px;
}

.field-actions {
  align-self: end;
}

label {
  font-size: 0.85rem;
  color: var(--muted);
}

input,
select,
textarea,
button {
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: #111923;
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.95rem;
}

textarea {
  width: 100%;
  resize: vertical;
  min-height: 80px;
}

.btn-primary {
  cursor: pointer;
  background: linear-gradient(180deg, var(--accent), #3f8bb8);
  color: #081421;
  border: none;
  font-weight: 700;
}

.btn-secondary {
  cursor: pointer;
  background: #1a2431;
  color: var(--text);
  border: 1px solid var(--panel-border);
  font-weight: 600;
}

.btn-secondary:hover {
  filter: brightness(1.08);
}

.btn-primary:hover {
  filter: brightness(1.06);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab {
  border: 1px solid var(--panel-border);
  background: #101822;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.tab.active {
  border-color: #6cbfe9;
  background: #183044;
  color: var(--accent-strong);
}

.server-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
  max-height: 180px;
  overflow: auto;
}

.compare-two-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-bottom: 10px;
}

.server-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid #243243;
  border-radius: 8px;
}

.chart-panel {
  height: 430px;
  overflow: hidden;
}

.chart-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 14px;
  height: calc(100% - 28px);
  min-height: 0;
  align-items: stretch;
}

.chart-wrap {
  min-width: 0;
  height: 100%;
  min-height: 0;
}

.stats-side {
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  background: #111923;
  padding: 10px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 8px;
  min-height: 0;
  overflow: hidden;
}

.stats-side h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text);
}

.stats-table-wrap {
  min-height: 0;
  max-height: 100%;
  overflow: auto;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.stats-table th,
.stats-table td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid #273140;
  white-space: nowrap;
}

.stats-table th {
  color: var(--muted);
  font-weight: 600;
  position: sticky;
  top: 0;
  background: #111923;
}

.stats-table th.sortable {
  cursor: pointer;
  user-select: none;
}

.stats-table th.sortable::after {
  content: ' ↕';
  opacity: 0.45;
}

.stats-table th.sortable[aria-sort='ascending']::after {
  content: ' ↑';
  opacity: 1;
}

.stats-table th.sortable[aria-sort='descending']::after {
  content: ' ↓';
  opacity: 1;
}

.stats-table td {
  color: var(--text);
}

#chartCanvas {
  display: block;
  width: 100%;
  height: 360px;
  max-height: 360px;
}

@media (max-width: 1024px) {
  .chart-panel {
    height: auto;
  }

  .chart-layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  .chart-wrap {
    height: 360px;
  }
}