/* ==============================
   Variables
   ============================== */
:root {
  --color-background: #f8f9fa;
  --color-surface: #ffffff;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #555555;
  --color-accent: #006d77;
  --color-highlight: #ffb703;

  --font-base: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 1rem;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-fast: 150ms ease-in-out;
  --max-width-content: 1200px;
}

/* ==============================
   Base Reset
   ============================== */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover, a:focus {
  color: var(--color-highlight);
}

/* ==============================
   App Structure
   ============================== */
.app-header {
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  border-bottom: 1px solid #ddd;
}

.app-main {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: var(--spacing-md);
}

.app-footer {
  text-align: center;
  padding: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  border-top: 1px solid #ddd;
  background-color: var(--color-surface);
}

.app-footer::after {
  content: "© 2026 Donau2Space.de";
  display: block;
  margin-top: var(--spacing-xs);
}

@media (min-width: 640px) {
  .app-header, .app-footer {
    padding: var(--spacing-lg);
  }
  .app-main {
    padding: var(--spacing-lg);
  }
}