body {
  background-color: #fff8dc;
  font-family: sans-serif;
  color: #000;
  font-size: 15px;
  text-align: center;
  margin: 0;
  margin-top: 0;
  padding: 0;
  background-image: url("/images/kawaii.smile.png");
  background-repeat: repeat;
  background-position: top left;
  background-size: auto;
}

.container {
  background-color: #fff8dc; 
  max-width: 760px;
  margin: 0 auto;
  padding: 20px;
  padding-top: 20px; /* 既にある場合はそのまま */
  border: 1px solid #999;
}

.container > h1 {
  margin-top: 0;  /* 上の余白を無くす */
}

.container.intro p {
  max-width: 600px;
  margin: 10px auto;
  text-align: center;
  line-height: 1.8;
  font-size: 15px;
}

h1 {
  font-family: "MS PGothic", "Osaka", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 36px;
  border-bottom: 2px solid #333;
  margin-top: 20px;
  margin-bottom: 20px;
  padding-bottom: 15px;
}

nav a.current {
  background-color: #ffccff; /* マゼンタピンク */
  color: #000;
  font-weight: bold;
  text-decoration: none;
  box-shadow: inset 0 0 6px #cc99cc;
  border-radius: 12px;  
  padding: 5px 12px;   
  transition: background-color 0.3s ease; 
}

nav {
  margin-bottom: 20px;
}

nav a {
  display: inline-block;
  margin: 0 10px;
  text-decoration: none;
  color: #0000cc;
  font-weight: bold;
  font-size: 16px;
}

nav a:hover {
  text-decoration: underline;
}

.responsive-br {
  display: inline; 
}

footer {
  margin-top: 40px;
  font-size: 12px;
  color: #666;
  border-top: 1px dotted #ccc;
  padding-top: 10px;
}

img {
  -webkit-user-drag: none;
  user-drag: none;
}

 .no-rightclick {
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
  user-select: none;
}

.back-btn-wrap {
  text-align: center;
  margin: 40px 0 20px 0;
}

.back-btn {
  display: inline-block;
  padding: 8px 20px;
  border: 2px solid #aaa;
  border-radius: 2px;
  background: linear-gradient(#f5f5f5, #dcdcdc);
  color: #000;
  font-weight: 600;
  font-family: "MS PGothic", "Osaka", sans-serif;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
}

.back-btn:hover {
  background: #d5d5d5;
}

.back-btn:active {
  background: #c0c0c0;
  transform: translateY(1px);
}

@media (max-width: 700px) {
  h1 {
    font-size: 30px;
    white-space: nowrap;
  }

  h1 img {
    width: 25px !important;
    height: auto;
    vertical-align: middle;
  }

  nav a {
    display: inline-block;
    margin: 0;
    font-size: 16px;
    padding: 4px 6px;
  }

  .responsive-br {
    display: block;
  }

}