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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f8f9fa;
  color: #212529;
  line-height: 1.5;
}

/* ── Header ─────────────────────────────────────────────────────────────── */

header {
  background: #ffffff;
  border-bottom: 1px solid #dee2e6;
  padding: 1.25rem 1.5rem;
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1a1a2e;
}

.subtitle {
  font-size: 0.95rem;
  color: #6c757d;
  margin-top: 0.2rem;
}

.last-updated {
  font-size: 0.8rem;
  color: #adb5bd;
  margin-top: 0.4rem;
}

/* ── Language toggle ─────────────────────────────────────────────────────── */

.lang-btn {
  flex-shrink: 0;
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: #ffffff;
  color: #495057;
  border: 1.5px solid #ced4da;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.lang-btn:hover {
  background: #e9ecef;
  border-color: #adb5bd;
}

/* ── Header actions (nav link + lang toggle) ───────────────────────────── */

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.8rem;
  color: #6c757d;
  text-decoration: none;
  transition: color 0.15s;
}

.nav-link:hover {
  color: #343a40;
}

/* ── Retrain log table ──────────────────────────────────────────────────── */

.retrain-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.retrain-table th,
.retrain-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid #e9ecef;
}

.retrain-table th {
  font-weight: 600;
  color: #6c757d;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.retrain-table tr.degraded {
  background: #fff3cd;
}

/* ── Main layout ─────────────────────────────────────────────────────────── */

main {
  max-width: 1000px;
  margin: 1.5rem auto;
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ── Warning banner ──────────────────────────────────────────────────────── */

.warning-banner {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: #664d03;
}

.warning-banner[hidden] {
  display: none;
}

.warning-icon {
  font-size: 1.1rem;
  line-height: 1;
}

/* ── Cards ───────────────────────────────────────────────────────────────── */

.card {
  background: #ffffff;
  border: 1px solid #e9ecef;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
  min-width: 0;
  overflow: hidden;
}

.card h2 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #343a40;
  margin-bottom: 0.75rem;
}

/* ── Charts ──────────────────────────────────────────────────────────────── */

.chart-container {
  width: 100%;
  max-width: 100%;
  min-height: 280px;
  overflow: hidden;
}

.chart-container .js-plotly-plot,
.chart-container .plot-container,
.chart-container .svg-container {
  max-width: 100% !important;
  width: 100% !important;
}

.chart-container .no-data-msg {
  text-align: center;
  padding-top: 120px;
}

.chart-meta {
  font-size: 0.8rem;
  color: #6c757d;
  margin-bottom: 0.5rem;
}

.no-data-msg {
  color: #adb5bd;
  font-size: 0.9rem;
  text-align: center;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 600px) {
  h1 {
    font-size: 1.2rem;
  }

  .card {
    padding: 1rem;
  }

  .chart-container {
    min-height: 220px;
  }
}