:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e8eef5;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --err: #f47174;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
}
h1 {
  font-size: 1.5rem;
  font-weight: 650;
  margin: 0 0 0.5rem;
}
.lead {
  color: var(--muted);
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
}
.panel {
  background: var(--card);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}
.panel h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 0.75rem;
  font-weight: 600;
}
label.file-btn {
  display: inline-block;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}
label.file-btn input {
  display: none;
}
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}
.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
@media (max-width: 520px) {
  .metrics {
    grid-template-columns: 1fr;
  }
}
.metric {
  background: rgba(0, 0, 0, 0.2);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
}
.metric .k {
  font-size: 0.75rem;
  color: var(--muted);
}
.metric .v {
  font-size: 1.05rem;
  font-weight: 600;
}
#error {
  display: none;
  color: var(--err);
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
}
#chart {
  width: 100%;
  min-height: 460px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th,
td {
  text-align: right;
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
th {
  color: var(--muted);
  font-weight: 600;
}
input[type="number"] {
  width: 4rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--bg);
  color: var(--text);
}
select {
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--bg);
  color: var(--text);
  min-width: 12rem;
}
.btn {
  cursor: pointer;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.42rem 0.8rem;
  border-radius: 8px;
  font-weight: 650;
}
.btn:hover {
  border-color: rgba(255, 255, 255, 0.2);
}
.hint {
  color: var(--muted);
  font-size: 0.92rem;
}
fieldset {
  border: none;
  margin: 0;
  padding: 0;
}
fieldset label {
  margin-inline-end: 1rem;
  cursor: pointer;
}