/* =========================
   Allgemeine Einstellungen
========================= */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  background-color: #f4f6f9;
  color: #222;
}

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

/* =========================
   Header
========================= */

header {
  background: #1e3a5f;
  color: white;
  padding: 20px 0;
  text-align: center;
}

header h1 {
  font-size: 2rem;
}

/* =========================
   Navigation
========================= */

nav {
  background: #16324f;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav li {
  margin: 0;
}

nav a {
  display: block;
  padding: 15px 20px;
  color: white;
  text-decoration: none;
  transition: background 0.3s ease;
}

nav a:hover,
nav a:focus {
  background: #28527a;
  outline: none;
}

/* =========================
   Hauptbereich
========================= */

main {
  padding: 40px 0;
}

/* Flexbox-Layout */

.content {
  display: flex;
  gap: 20px;
  align-items: stretch;
  flex-wrap: wrap;
}

.card {
  flex: 1 1 300px;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* =========================
   Bilder / Medien
========================= */

img,
video {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

/* =========================
   Tabellen
========================= */

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

th,
td {
  padding: 12px;
  border: 1px solid #ccc;
  text-align: left;
}

th {
  background-color: #1e3a5f;
  color: white;
}

/* =========================
   Buttons
========================= */

button,
.btn {
  background-color: #1e3a5f;
  color: white;
  border: none;
  padding: 12px 18px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover,
.btn:hover {
  background-color: #28527a;
}

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

footer {
  background: #1e3a5f;
  color: white;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
}

/* =========================
   Accessibility
========================= */

a:focus,
button:focus {
  outline: 3px solid #ffbf47;
  outline-offset: 2px;
}

/* =========================
   Responsive Design
========================= */

/* Tablets */

@media (max-width: 992px) {

  header h1 {
    font-size: 1.7rem;
  }

  nav ul {
    justify-content: center;
  }

  .content {
    flex-direction: column;
  }
}

/* Smartphones */

@media (max-width: 600px) {

  body {
    font-size: 15px;
  }

  header {
    padding: 15px 10px;
  }

  header h1 {
    font-size: 1.4rem;
  }

  nav ul {
    flex-direction: column;
  }

  nav a {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .container {
    width: 95%;
  }

  .card {
    padding: 15px;
  }
}

/* Große Bildschirme */

@media (min-width: 1400px) {

  body {
    font-size: 18px;
  }

  .container {
    max-width: 1400px;
  }
}