html, body {
    margin: 0;
    padding: 0;
    height: 100%; /* 画面全体を利用 */
}

header {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 5px 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

header h1 {
    font-size: 24px;
    font-weight: bold;
    color: #B22222;
    text-shadow: none;
    margin: 0;
    letter-spacing: 1px;
    text-align: center;
}

#map {
  width: 100%;
  height: calc(100vh - 140px);
  position: relative;
  z-index: 0;
}

#zoom-info {
  text-align: left;
  margin: 10px 15px;
  font-size: 14px;
  font-weight: bold;
}

#credits {
    text-align: right;
    margin: 10px 15px 40px;
    font-size: 12px;
    color: #333;
    line-height: 1.6;
}

#credits ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

#credits li {
    margin: 0;
}

#credits a {
    text-decoration: none;
    color: #007BFF;
}

#credits a:hover {
    text-decoration: underline;
}

#author {
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: #333;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 5px 0;
    z-index: 1000;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.2);
}