html, body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, sans-serif;
  background: #f4efe5;
}

.full {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  padding: 0;
}

.bg {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  object-fit: cover;
  object-position: center center;
  display: block;
}

.btn {
  position: fixed;
  left: 50%;
  bottom: 4%;
  transform: translateX(-50%);
  background: rgba(23, 67, 74, 0.94);
  color: white;
  text-decoration: none;
  padding: 16px 30px;
  border-radius: 40px;
  font-weight: bold;
  font-size: clamp(16px, 4vw, 24px);
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
  z-index: 5;
  white-space: nowrap;
}

/* Handy: Bild komplett sichtbar, nicht rechts/links abschneiden */
@media (max-width: 768px) {
  html, body {
    background: #eadcc7;
  }

  .full {
    min-height: 100dvh;
    padding: 12px;
  }

  .bg {
    width: 100%;
    height: auto;
    max-height: calc(100dvh - 90px);
    object-fit: contain;
    object-position: center center;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,.18);
  }

  .btn {
    bottom: 14px;
    width: calc(100% - 32px);
    text-align: center;
    padding: 14px 18px;
    white-space: normal;
  }
}

/* Querformat auf Handy */
@media (max-width: 900px) and (orientation: landscape) {
  .bg {
    height: 100dvh;
    width: auto;
    max-width: calc(100vw - 190px);
    max-height: 100dvh;
  }

  .btn {
    left: auto;
    right: 12px;
    bottom: 12px;
    transform: none;
    width: 150px;
  }
}