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

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: #f7f7f7;
  color: #222;
  font-family: sans-serif;
}

.app-header {
  background-color: #ffffff;
  border-bottom: 1px solid #ddd;
  padding: 1rem 2rem;
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: row;
  padding: 1rem 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.app-footer {
  background-color: #fafafa;
  border-top: 1px solid #ddd;
  text-align: center;
  padding: 0.75rem;
  font-size: 0.875rem;
  color: #555;
}

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

.filter-panel {
  flex: 0 0 250px;
  background-color: #ffffff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1rem;
  box-sizing: border-box;
  height: fit-content;
}

.chart-container {
  flex: 2 1 600px;
  background-color: #ffffff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1rem;
  box-sizing: border-box;
  min-height: 400px;
}

.stats-panel {
  flex: 1 1 300px;
  background-color: #ffffff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1rem;
  box-sizing: border-box;
  min-height: 200px;
}

@media (max-width: 900px) {
  .app-main {
    flex-direction: column;
    padding: 1rem;
  }

  .filter-panel, .chart-container, .stats-panel {
    flex: 1 1 100%;
  }
}

/* ==============================
   Footer Copyright
   ============================== */
.app-footer::after {
  content: "© 2026 Donau2Space.de";
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: #888;
}