/* ============================
   Reset und Variablen
============================ */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

:root {
  /* Farbvariablen */
  --color-bg: #f9f9fa;
  --color-surface: #ffffff;
  --color-primary: #2d6cdf;
  --color-accent: #21978d;
  --color-text: #1b1b1b;
  --color-muted: #6b7280;
  --color-border: #d1d5db;

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

  /* Schriftvariablen */
  --font-base: 'Segoe UI', Roboto, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;

  /* Layoutvariablen */
  --max-content-width: 1280px;
  --header-height: 3.5rem;
  --sidebar-width: 16rem;

  /* Breakpoints */
  --bp-md: 640px;
  --bp-lg: 1024px;
}

/* ============================
   Grundlayout
============================ */

.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  height: var(--header-height);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  font-weight: 600;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: row;
  max-width: var(--max-content-width);
  width: 100%;
  margin: 0 auto;
  background-color: var(--color-bg);
}

.app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--spacing-md);
}

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

/* Responsives Layout */

@media (max-width: var(--bp-md)) {
  .app-main {
    flex-direction: column;
  }
  .app-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
}

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