/* =============================================
   CSS Reset und Variablen
============================================= */
html {
  box-sizing: border-box;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

body {
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

:root {
  --color-bg: #f8f9fa;
  --color-text: #222;
  --color-primary: #0a74da;
  --color-secondary: #e0e0e0;
  --color-border: #ccc;
  --color-accent: #0056b3;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  --font-base: 'Segoe UI', Roboto, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
}

/* =============================================
   App Shell Layout
============================================= */
.app-header {
  background-color: var(--color-primary);
  color: #fff;
  padding: var(--spacing-md);
  text-align: center;
  font-weight: 600;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: row;
  padding: var(--spacing-md);
  gap: var(--spacing-md);
}

.app-sidebar {
  flex: 0 0 250px;
  background-color: var(--color-secondary);
  padding: var(--spacing-md);
  border-right: 1px solid var(--color-border);
}

.app-footer {
  background-color: var(--color-secondary);
  color: var(--color-text);
  text-align: center;
  font-size: var(--font-size-sm);
  padding: var(--spacing-sm);
  border-top: 1px solid var(--color-border);
}

@media (max-width: 768px) {
  .app-main {
    flex-direction: column;
  }

  .app-sidebar {
    flex: 1 0 auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
}

/* Footer legal notice */
.app-footer::after {
  content: "© 2026 Donau2Space.de";
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 0.75rem;
  color: var(--color-text);
  opacity: 0.7;
}