body {
  font-family: 'Noto Serif JP', serif;
  color: #222;
  background-color: #f7f7f7;
  margin: 0;
  line-height: 1.9;
}

/* Header */
header {
  background: linear-gradient(120deg, #002b36, #014d4e);
  color: white;
  text-align: center;
  padding: 80px 20px 60px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.header-inner h1 {
  font-size: 2.4em;
  margin: 0;
  letter-spacing: 1px;
}

.subtitle {
  margin-top: 10px;
  font-size: 1em;
  opacity: 0.85;
}

/* Sections */
main {
  max-width: 900px;
  margin: 60px auto;
  background: white;
  padding: 50px;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

section {
  margin-bottom: 60px;
}

h2 {
  font-size: 1.4em;
  color: #014d4e;
  border-left: 5px solid #02ccba;
  padding-left: 10px;
  margin-bottom: 20px;
}

p {
  text-align: justify;
  color: #333;
  margin-bottom: 20px;
}

/* Photos */
.photo-gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 25px;
}

figure {
  width: 260px;
  background: #fafafa;
  border-radius: 8px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
  overflow: hidden;
}

figure img {
  width: 100%;
  height: auto;
  display: block;
}

figcaption {
  font-size: 0.9em;
  padding: 10px;
  color: #555;
  background-color: #f4f4f4;
  text-align: center;
}

/* Back button */
.back-container {
  text-align: center;
  margin-top: 50px;
}

.back-button {
  display: inline-block;
  padding: 12px 24px;
  background-color: #014d4e;
  color: white;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s ease, transform 0.3s ease;
}

.back-button:hover {
  background-color: #02ccba;
  transform: translateY(-3px);
}

/* Footer */
footer {
  text-align: center;
  padding: 25px;
  background-color: #002b36;
  color: white;
  font-size: 0.9em;
  margin-top: 60px;
}