/* 基本設定 */
body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background: #fff;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  height: 60vh;
  min-height: 400px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  background: #077071; /* 画像読み込み前の背景色 */
}

.hero-img {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.8;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 1rem;
}

.hero-content h1 {
  font-weight: 700;
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.hero-content p {
  font-weight: 300;
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.overview-table {
  width: 100%;
  max-width: 640px;  /* テーブル幅固定もOK */
  margin: 1.5rem auto 0;
  border-collapse: collapse;
  font-size: 1rem;
}

.overview-table td {
  border: 1px solid #ccc;
  padding: 10px 15px;
  vertical-align: top;
}

.overview-table .label {
  background-color: #f0fdfd;
  color: #077071;
  font-weight: 700;
  width: 140px;
}

.btn-primary {
  background-color: #ffffff;
  color: white;
  text-decoration: none;
  padding: 0.75rem 2rem;
  border-radius: 5px;
  font-weight: 700;
  color: #055350;
  transition: background-color 0.3s ease;
  display: inline-block;
}

.btn-primary:hover {
  background-color: #ffffff;
}

/* ===== Navigation Menu ===== */
.main-menu {
  background: #f5f5f5;
  padding: 1rem 0;
  text-align: center;
  box-shadow: 0 2px 5px rgb(0 0 0 / 0.1);
}

.main-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: inline-flex;
  gap: 1.5rem;
  font-weight: 500;
}

.main-menu ul li a {
  color: #077071;
  text-decoration: none;
  padding: 0.5rem 1.2rem;
  border: 2px solid #077071;
  border-radius: 5px;
  transition: background-color 0.3s, color 0.3s;
  display: inline-block;
}

.main-menu ul li a:hover,
.main-menu ul li a:focus {
  background-color: #077071;
  color: white;
}

/* ===== Info Section (News & Updates) ===== */
.info {
  max-width: 720px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.info h2 {
  font-weight: 700;
  color: #077071;
  margin-bottom: 1rem;
}

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-list li {
  margin-bottom: 0.8rem;
  font-weight: 400;
  font-size: 1rem;
}

.news-list li .date {
  color: #888;
  margin-right: 0.5rem;
  font-weight: 500;
}

/* ===== Overview ===== */
.overview {
  max-width: 720px;
  margin: 3rem auto;
  padding: 0 1rem;
  text-align: center;
}

.overview h2 {
  color: #077071;
  font-weight: 700;
  margin-bottom: 1rem;
}

.overview p {
  font-weight: 300;
  line-height: 1.6;
  font-size: 1.1rem;
}

/* ===== Access Section ===== */
.access {
  max-width: 720px;
  margin: 3rem auto 5rem;
  padding: 0 1rem;
  text-align: center;
}

.access h2 {
  color: #077071;
  font-weight: 700;
  margin-bottom: 1rem;
}

.access p {
  font-weight: 400;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid #077071;
  color: #077071;
  padding: 0.6rem 1.5rem;
  border-radius: 5px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-secondary:hover {
  background-color: #077071;
  color: white;
}

/* ===== Footer ===== */
footer {
  background-color: #077071;
  color: white;
  text-align: center;
  padding: 1rem 1rem;
  font-size: 0.9rem;
  font-weight: 400;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .main-menu ul {
    flex-direction: column;
    gap: 0.8rem;
  }
}