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

/* Farben */

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --background: #f4f7fb;
  --surface: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #dbe3ec;
}

/* Grundlayout */

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: var(--background);
  color: var(--text);
  line-height: 1.6;
}

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

header {
  background-color: var(--surface);
  padding: 18px 40px;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

nav {
  background-color: var(--surface);
  padding: 15px 40px;
  border-bottom: 1px solid var(--border);
}

nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  margin-right: 20px;
  padding: 10px 16px;
  border-radius: 10px;
  transition: 0.3s;
}

nav a:hover {
  background-color: #e8f0ff;
  color: var(--primary);
}

/* =========================
   Überschriften
========================= */

h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  color: var(--primary);
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 15px;
  color: var(--primary-dark);
}

h3 {
  margin-bottom: 10px;
  color: var(--text);
}

/* =========================
   Hauptinhalt
========================= */

main {
  background-color: var(--surface);
  margin: 40px;
  padding: 40px;
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

/* Texte */

p {
  margin-bottom: 18px;
  color: var(--text-light);
  font-size: 1.05rem;
}

/* =========================
   Links
========================= */

a {
  color: var(--primary);
  transition: 0.3s;
}

a:hover {
  color: var(--primary-dark);
}

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

button {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background-color: var(--primary-dark);
}

/* =========================
   Suchfeld
========================= */

input[type="text"],
input[type="search"] {

  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  background-color: white;
}

input:focus {
  outline: none;
  border-color: var(--primary);
}

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

img {
  border-radius: 14px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

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

footer {
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  padding: 25px;
  text-align: center;
  margin-top: 40px;
}

footer a {
  margin: 0 10px;
  text-decoration: none;
}