:root {
  --primary-color: #71c55d;
  --secondary-color: #444444;
}

body {
  font-family: "Open Sans", sans-serif;
  color: var(--secondary-color);
  padding-top: 70px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Dosis", sans-serif;
}

.fixed-top {
  background: white;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.section-bg {
  background-color: white;
}

.header-title {
  font-family: "Dosis", sans-serif;
  font-size: 28px; /* 少し小さく */
  font-weight: bold; /* 太文字 */
  margin: 0 auto; /* 中央に配置 */
}

.btn-outline-primary {
  background-color: #03A9F4;
  color: white;
  margin-left: 10px;
}

.btn-outline-primary i {
  color: white;
}

.common-wrap {
  position: relative;
  overflow: hidden;
  margin-bottom: 30px;
  border-radius: 6px;
}

.common-wrap img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  background-color: white;
  object-fit: cover;
}

.common-wrap img:not([src]), 
.common-wrap img[src=""] {
  background-color: #f0f0f0; /* 薄いグレー */
  border: 1px solid #ddd;
  width: 100%;
  height: 0;
  padding-bottom: 75%; /* 4:3 aspect ratio */
}

.common-wrap:hover img {
  transform: scale(1.1);
}

.common-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 15px;
  background: rgba(192, 192, 192, 0.9);
}

#w-common {
  background-color: white;
}

.back-to-top {
  position: fixed;
  right: 15px;
  bottom: 15px;
  background: var(--primary-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.back-to-top:hover {
  background: #8bd07b;
  color: white;
}

#footer {
  background-color: #f0f0f0;
}

.footer-links ul li i {
  color: #03A9F4;
}

.footer-links ul li a {
  color: #333;
}

.chart-container {
  height: 90px;
  position: relative;
  margin: 10px;
}

.chart-title {
  text-align: center;
  font-weight: bold;
  margin-bottom: 10px;
  font-size: 14px;
}

.chart-box {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 10px;
  background-color: #f8f9fa;
  height: 150px;
}

.fixed-top {
  background: white;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.header2 {
  background-color: white;
  padding-top: 2.67rem;
  margin-top: 2.67rem;
}

.header2-img img {
  max-width: 100%;
  height: auto;
}

.section-title h2 {
  font-size: 32px;
  font-weight: 700;
  position: relative;
  font-family: "Dosis", sans-serif;
  display: inline-block;
  margin-bottom: 0;
  vertical-align: middle;
}

.section-title i.fa-water {
  font-size: 32px;
  vertical-align: middle;
  color: #0066FF;
  margin-right: 10px;
}

.section-title i.fa-mountain {
  font-size: 32px;
  vertical-align: middle;
  color: green;
  margin-right: 10px;
}

hr {
  width: 100%;
  margin: 50px auto;
  border: 0;
  border-top: 2px solid #808080;
}