/* =============================
   App Shell Layout
   ============================= */

body {
  margin: 0;
  font-family: sans-serif;
  background-color: #f8f9fa;
  color: #222;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #fff;
  border-bottom: 1px solid #ccc;
}

.filter-panel {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2rem;
  background-color: #f0f0f0;
  border-bottom: 1px solid #ddd;
}

.chart-area {
  display: grid;
  grid-template-columns: 1fr;
  grid-gap: 1rem;
  padding: 1rem 2rem;
  background-color: #fff;
}

.stats-summary {
  padding: 1rem 2rem;
  background-color: #fafafa;
  border-top: 1px solid #ddd;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.app-footer {
  padding: 0.75rem 2rem;
  text-align: center;
  background-color: #fff;
  border-top: 1px solid #ccc;
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .chart-area {
    grid-template-columns: 1fr 1fr;
  }
}

/* =============================
   Chart Panels
   ============================= */

.chart-panel {
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  padding: 1rem;
}

.chart-area canvas {
  width: 100%;
  height: 300px;
  display: block;
}

/* =============================
   Filter Controls
   ============================= */

.filter-panel select,
.filter-panel button {
  padding: 0.5rem 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background-color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

.filter-panel button {
  background-color: #007bff;
  color: #fff;
  border-color: #007bff;
  transition: background-color 0.2s ease;
}

.filter-panel button:hover {
  background-color: #0056b3;
}

/* =============================
   Footer Copyright
   ============================= */

.app-footer::after {
  content: "© 2025 Donau2Space.de";
  display: block;
  margin-top: 0.25rem;
  color: #666;
  font-size: 0.8rem;
}