/* ????????? */
body {
  font-family: "Helvetica Neue", sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  line-height: 1.6;
}

header {
  background-color: #007acc;
  color: white;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 24px;
}

header p {
  margin-top: 10px;
  font-size: 16px;
}

select {
  font-size: 16px;
  padding: 6px 10px;
  margin-top: 10px;
}

/* ????????? */
.dashboard {
  padding: 20px;
  background-color: #ffffff;
  border-bottom: 1px solid #ccc;
}

.dashboard h2 {
  margin-top: 30px;
  font-size: 20px;
  color: #007acc;
}

.button-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

/* ????????a??? */
.quiz-link {
  display: inline-block;
  flex: 1 1 150px;
  padding: 12px;
  font-size: 16px;
  background-color: #e0f4ff;
  border: 1px solid #007acc;
  border-radius: 4px;
  text-align: center;
  text-decoration: none;
  color: #000;
  cursor: pointer;
  transition: background-color 0.2s;
}

.quiz-link:hover {
  background-color: #c0e8ff;
}

/* ?????????????? */
.layout {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: nowrap;
  padding: 20px;
  gap: 20px;
}

/* ??????PC?? */
.ad-area {
  width: 160px;
  min-width: 160px;
  flex-shrink: 0;
  background-color: #eee;
  padding: 10px;
  text-align: center;
  font-size: 14px;
  border: 1px solid #ccc;
}

.ad-area img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* ???????????????? */
#ad-bottom {
  display: none;
  padding: 10px;
  background-color: #eee;
  text-align: center;
  border-top: 1px solid #ccc;
  width: 100%;
}

/* ???????? */
.quiz-area {
  flex: 1;
  min-width: 0;
}

/* ??????? */
.quiz-block {
  margin-bottom: 30px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background-color: #fafafa;
}

/* ??????? */
.quiz-title h2 {
  margin-top: 0;
  color: #333;
}

/* ?????? */
.quiz-option {
  display: block;
  width: 100%;
  max-width: 500px;
  margin: 10px auto;
  padding: 12px 16px;
  font-size: 16px;
  background-color: #f0f0f0;
  border: 1px solid #ccc;
  border-radius: 4px;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s;
}

.quiz-option:hover {
  background-color: #e0e0e0;
}

/* ???????? */
.quiz-result {
  font-weight: bold;
  margin-top: 15px;
  font-size: 18px;
  color: #333;
}

/* ???? */
.quiz-explanation {
  font-style: italic;
  margin-top: 8px;
  font-size: 15px;
  color: #666;
}

/* ???????????????????? */
.quiz-nav {
  margin-top: 40px;
  text-align: center;
}

.quiz-nav button {
  display: inline-block;
  margin: 0 12px;
  padding: 10px 20px;
  font-size: 15px;
  background-color: #007acc;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.quiz-nav button:hover {
  background-color: #005fa3;
}

/* ??????????????????? */
@media screen and (max-width: 768px) {
  .layout {
    flex-direction: column;
  }

  #ad-left,
  #ad-right {
    display: none;
  }

  #ad-bottom {
    display: block;
  }

  .quiz-area {
    padding: 0;
  }
}