/* ---------- ROOT ---------- */
:root {
  --lite-bg: #f5f7fa;
  --lite-card: #ffffff;
  --lite-text: #1a1a1a;
  --lite-accent: #4a7cff;

  --dark-bg: #0d1117;
  --dark-card: #161b22;
  --dark-text: #e6edf3;
  --dark-accent: #58a6ff;

  --transition: 0.3s ease;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: var(--lite-bg);
  color: var(--lite-text);
  transition: var(--transition);
}

body.dark {
  background: var(--dark-bg);
  color: var(--dark-text);
}

/* ---------- HEADER ---------- */
header {
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#modeToggle {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: var(--lite-accent);
  color: #fff;
  transition: var(--transition);
}

body.dark #modeToggle {
  background: var(--dark-accent);
}

/* ---------- GRID ---------- */
.container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
  padding: 20px 40px;
}

.card {
  background: var(--lite-card);
  padding: 25px;
  border-radius: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: var(--transition);
}

body.dark .card {
  background: var(--dark-card);
  box-shadow: 0 4px 12px rgba(255,255,255,0.05);
}

.card h2 {
  margin-top: 0;
  font-weight: 600;
}

/* ---------- CHARTS ---------- */
.chart {
  width: 100%;
  height: 260px;
  border-radius: 12px;
}

/* ---------- EVENT-ME LOG ---------- */
#eventLog {
  height: 260px;
  overflow-y: auto;
  font-size: 14px;
  padding-right: 10px;
}

/* ---------- BUTTONS ---------- */
.action-btn {
  background: var(--lite-accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  margin-top: 10px;
  transition: var(--transition);
}

body.dark .action-btn {
  background: var(--dark-accent);
}