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

:root {
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #666;
  --color-primary: #1976d2;
  --color-positive: #2e7d32;
  --color-negative: #c62828;
  --border-radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.pnl-cell { text-align: right; }
.positive { color: var(--color-positive); }
.negative { color: var(--color-negative); }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg) 25%,
    #f0f0f0 50%,
    var(--color-bg) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
}

@keyframes loading-spin {
  to { transform: rotate(360deg); }
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-bg);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: loading-spin 0.8s linear infinite;
}

.table-container {
  position: relative;
}

.table-loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  transition: opacity 0.2s ease;
  z-index: 1;
}