body {
  font-family: 'Noto Sans JP', sans-serif;
  background: linear-gradient(135deg, #ffe0f0, #ffb3e6);
  text-align: center;
  color: #333;
  padding: 0;
  margin: 0;
}

#quiz-container {
  max-width: 750px;
  margin: 30px auto;
  background-color: #fff8fb;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 10px rgba(255, 105, 180, 0.5);
}

.header-image {
  width: 60%;
  display: block;
  margin: 0 auto 16px auto;
}

h1 {
  font-family: 'Kaisei Decol', serif;
  color: #ff66b2;
  margin-bottom: 20px;
  text-shadow: 1px 1px 5px #ff99cc;
}

button {
  background-color: #ff80bf;
  border: none;
  color: white;
  padding: 12px 20px;
  margin: 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1em;
  box-shadow: 0 2px 6px rgba(255, 105, 180, 0.6);
  transition: transform 0.1s;
}

button:hover {
  background-color: #ff59ac;
  transform: scale(1.05);
}

.choice {
  width: 90%;
  margin: 8px auto;
  display: block;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}

.choice:focus,
.choice:active {
  outline: none;
}

#timer {
  font-size: 1.2em;
  color: #ff3399;
  margin: 10px 0;
}

.result-item {
  margin: 6px 0;
  font-size: 0.95em;
}

.result-item .mark {
  font-size: 1.5em;
}

.result-detail {
  margin: 10px 0;
  padding: 10px;
  border-bottom: 1px solid #ff80bf;
  text-align: left;
}

.result-heading {
  font-size: 1.1em;
  font-weight: bold;
  color: #ff3366;
  margin-bottom: 5px;
  font-family: 'Kaisei Decol', serif;
}

.result-summary {
  font-size: 1em;
  color: #333;
  margin-bottom: 5px;
}

.result-line {
  font-size: 0.95em;
  color: #666;
}

.result-icon {
  font-weight: bold;
}

.correct {
  color: #33cc33;
}

.incorrect {
  color: #ff3333;
}

.hidden {
  display: none;
}

#pageFooter {
  background-color: #ffccdd;
  padding: 20px;
  margin-top: 30px;
  text-align: center;
  font-size: 0.9em;
  color: #660033;
}

#pageFooter a {
  color: #cc3366;
  text-decoration: none;
  margin: 0 10px;
}

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

#pageFooter h2 {
  font-family: 'Kaisei Decol', serif;
  color: #ff3366;
  margin-bottom: 10px;
}

#pageFooter p {
  margin: 5px 0;
  line-height: 1.4;
}

@media screen and (max-width: 768px) {
  #quiz-container {
    width: 90%;
    padding: 10px;
  }

  .header-image {
    width: 80%;
    margin-bottom: 12px;
  }

  h1 {
    font-size: 1.4em;
  }

  .choice {
    padding: 10px;
    font-size: 0.9em;
  }

  button {
    padding: 10px 15px;
    font-size: 0.9em;
  }

  .result-item {
    font-size: 0.9em;
  }

  .result-heading {
    font-size: 1em;
  }

  .result-summary, .result-line {
    font-size: 0.9em;
  }

  #pageFooter {
    padding: 15px;
    font-size: 0.8em;
  }
}