body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  background: #f8f9fa;
  color: #212529;
}

/* Basisfarben: hell */
body {
  background: #f8f9fa;
  color: #212529;
  transition: background 0.3s ease, color 0.3s ease;
  position: relative;
}

body.dark-mode {
  background: #333;
  color: #e0e0e0;
}

body.dark-mode input[type="text"],
body.dark-mode button {
  background-color: #1e1e1e;
  color: #e0e0e0;
  border-color: #333;
}

body.dark-mode input[type="text"]:focus {
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.5);
}

body.dark-mode button {
  background-color: #0d6efd;
}

body.dark-mode button:hover {
  background-color: #0b5ed7;
}

.footer {
  position: absolute;
  bottom: 1rem;
  width: 100%;
  display: flex;
  justify-content: center;
  font-size: 0.9rem;
  opacity: 0.75;
}

.footer .options {
  gap: 0.5rem;
  display: flex;
  align-items: center;
}

body.dark-mode .footer {
  opacity: 0.85;
}

h1 {
  margin-bottom: 1.5rem;
  font-size: 1.8rem;
}

.headline {
  font-size: 1.3rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.headline .arrow {
  color: aquamarine;
  opacity: 0.6;
  font-size: 0.9em;
}

input[type="text"] {
  width: 80%;
  max-width: 600px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.3s ease;
}

input[type="text"]:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.3);
}

.options {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1;
}

input[type="checkbox"] {
  box-shadow: none;
  width: auto;
}

label {
  margin: 0;
}

button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  background-color: #007bff;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin: 2rem;
}

button:hover {
  background-color: #0056b3;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.4rem;
    text-align: center;
  }

  input[type="text"],
  button {
    font-size: 0.95rem;
  }
}