:root {
  --bg0: #0f1412;
  --bg1: #162019;
  --bg2: #1c2a22;
  --ink: #e8f0ea;
  --muted: #8fa396;
  --line: rgba(232, 240, 234, 0.12);
  --accent: #3dba7a;
  --accent-dim: #2a8f5c;
  --warn: #e8a54b;
  --danger: #e07070;
  --corr-neg: #c45c5c;
  --corr-pos: #3dba7a;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 90% 60% at 10% -10%, rgba(61, 186, 122, 0.18), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 0%, rgba(232, 165, 75, 0.08), transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 45%, #121a16);
  line-height: 1.45;
}

.page {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3.5rem;
}

.hero {
  margin-bottom: 1.75rem;
}

.brand {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.65rem, 3.5vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.lede {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 0.85rem;
  align-items: end;
  padding: 1rem 1.1rem;
  background: rgba(22, 32, 25, 0.75);
  border: 1px solid var(--line);
  backdrop-filter: blur(8px);
  margin-bottom: 0.75rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 7.5rem;
}

.field.grow {
  flex: 1 1 16rem;
  min-width: 12rem;
}

.field span {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

.field input,
.field select {
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--bg0);
  border: 1px solid var(--line);
  padding: 0.55rem 0.65rem;
  outline: none;
}

.field input:focus,
.field select:focus {
  border-color: var(--accent-dim);
}

.btn {
  font: inherit;
  font-weight: 600;
  color: #06110a;
  background: var(--accent);
  border: none;
  padding: 0.62rem 1.25rem;
  cursor: pointer;
  align-self: end;
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  background: #4fd38c;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: wait;
}

.status {
  min-height: 1.25rem;
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--muted);
  font-family: var(--mono);
}

.error {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  background: rgba(224, 112, 112, 0.12);
  border: 1px solid rgba(224, 112, 112, 0.35);
  color: #f0b4b4;
  font-size: 0.9rem;
}

.panel {
  margin-bottom: 1.25rem;
  padding: 1.15rem 1.2rem 1.25rem;
  background: rgba(15, 20, 18, 0.55);
  border: 1px solid var(--line);
}

.panel-head {
  margin-bottom: 0.85rem;
}

.panel-head h2 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.panel-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.chart-wrap {
  position: relative;
  height: 340px;
}

.chart-wrap--sm {
  height: 260px;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.interpretation {
  margin: 0 0 0.75rem;
  padding: 0.65rem 0.75rem;
  background: rgba(61, 186, 122, 0.08);
  border-left: 3px solid var(--accent);
  font-size: 0.92rem;
  color: var(--ink);
}

.matrix {
  overflow-x: auto;
}

.matrix table {
  border-collapse: collapse;
  width: 100%;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.matrix th,
.matrix td {
  padding: 0.55rem 0.65rem;
  text-align: center;
  border: 1px solid var(--line);
}

.matrix th {
  color: var(--muted);
  font-weight: 500;
  background: rgba(0, 0, 0, 0.2);
}

.matrix td.diag {
  color: var(--muted);
}

.matrix td.clickable {
  cursor: pointer;
}

.matrix td.clickable:hover {
  outline: 1px solid var(--accent);
}

.matrix td.active-pair {
  outline: 2px solid var(--accent);
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.85rem;
}

.presets-label {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 0.25rem;
}

.chip {
  font: inherit;
  font-size: 0.85rem;
  color: var(--ink);
  background: rgba(22, 32, 25, 0.8);
  border: 1px solid var(--line);
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}

.chip:hover,
.chip.active {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.panel-head.row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.tab {
  font: inherit;
  font-size: 0.82rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  padding: 0.3rem 0.65rem;
  cursor: pointer;
}

.tab.active {
  color: var(--ink);
  border-color: var(--accent-dim);
  background: rgba(61, 186, 122, 0.1);
}

.data-table {
  overflow-x: auto;
  margin-top: 0.5rem;
}

.data-table table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 0.45rem 0.55rem;
  border-bottom: 1px solid var(--line);
}

.data-table th {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table .mono {
  font-family: var(--mono);
  font-size: 0.84rem;
}

.data-table button.linkish {
  font: inherit;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.event-grids {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.event-card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.event-card .meta {
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  font-family: var(--mono);
}

.field.inline {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.field.inline select {
  font: inherit;
  color: var(--ink);
  background: var(--bg0);
  border: 1px solid var(--line);
  padding: 0.4rem 0.55rem;
}

.pair-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.pair-form input {
  font: inherit;
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--bg0);
  border: 1px solid var(--line);
  padding: 0.45rem 0.55rem;
  min-width: 4.5rem;
  flex: 1;
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.88rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.pill {
  font-size: 0.8rem;
  font-family: var(--mono);
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line);
}

.pill.up { color: var(--corr-pos); border-color: rgba(61, 186, 122, 0.4); }
.pill.down { color: #e07070; border-color: rgba(224, 112, 112, 0.4); }
.pill.div { color: var(--warn); border-color: rgba(232, 165, 75, 0.4); }

.heatmap {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10px, 1fr));
  gap: 2px;
  max-height: 220px;
  overflow: auto;
}

.heatmap .cell {
  aspect-ratio: 1;
  min-height: 10px;
}

.heatmap .cell.both_up { background: rgba(61, 186, 122, 0.75); }
.heatmap .cell.both_down { background: rgba(196, 92, 92, 0.75); }
.heatmap .cell.diverge { background: rgba(232, 165, 75, 0.55); }

.foot {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.foot p {
  margin: 0;
  max-width: 40rem;
}

@media (max-width: 820px) {
  .split {
    grid-template-columns: 1fr;
  }

  .chart-wrap {
    height: 280px;
  }
}