@charset "UTF-8";
body {
    /* font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;*/
    font-family: "Zen Maru Gothic", sans-serif;
    font-weight: 500;
    font-style: normal;
    background:#151a40;
    margin: 0;
    padding: 0;
    color: #ffffff;
    transition: opacity 0.6s ease;
}

@media only screen and (max-width: 480px) {  
    body{
        width: 0.6em;
    }
 }
  

  header {
    background: #fff;
    padding: 1rem 2rem;
    border-bottom: 2px solid #eee;
  }
  
  /*  h1 {
    margin: 0;
    font-size: 1.6rem;
    border-left: 6px solid #4aa3df;
    padding-left: 0.5em;
  } */
  
  .main-visual {
    text-align: center;
  }
  
  .main-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
  }
  
  section {
    padding: 2rem;
    text-align: center;
  }
  
  
  .about p {
    margin-right: auto;
    line-height: 2.0rem;
    color: #ffffff;
    font-size: 20px;
  }
  
  .quiz-btn {
    background: #e32168;
    color: white;
    padding: 1rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  
  .quiz-btn:hover {
    background: #bbe12a;
  }
  
  /* ---- Word List ---- */
.word-heading{
    background-color: red;
}

/* PC サイズ */
@media only screen and (min-width: 640px) {  
    .word-heading{
        background-color: rgb(34, 20, 237);
    }
 }

  .word-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
    max-width: 800px;
    margin-inline: auto;
  }
  
  .word-card {
    background: #bbe12a;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 6px white;
    transition: 0.25s ease;
    cursor: pointer; /* ←追加！クリックできる見た目に */
  }
  
  .word-card:hover {
    background: #2fc4a6;
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1); /* ←影を少し強めにして立体感 */
  }
  
  
  footer {
    background: #fff;
    border-top: 1px solid #eee;
    padding: 1rem;
    text-align: center;
    color: #888;
  }
  
  /* フェードアウト効果 */
  .fade-out {
    opacity: 0;
  }
  
  
  /* quiz page */
  header {
    background: #e32168;
    padding: 1rem 2rem;
    border-bottom: 2px solid #0d0808;
  }

  h1 {
    margin: 0;
    font-size: 1.6rem;
    padding-left: 0.5em;
  }

  .quiz-container {
    max-width: 700px;
    margin: 2rem auto;
    background: #151a40;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgb(255, 17, 215);
  }
  
  .choice {
    display: block;
    width: 100%;
    background: #2fc4a6;
    border: none;
    border-radius: 8px;
    padding: 1rem;
    margin: 0.5rem 0;
    text-align: left;
    cursor: pointer;
    transition: 0.2s;
    font-size: 1rem;
  }
  
  .choice:hover {
    background: #ffef09;
  }
  
  .hidden {
    display: none;
  }
  
  .explanation, .usage {
    background: #151a40;
    margin-top: 1.5rem;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgb(240, 255, 33);
    text-align: left;
  }
  
  .next-btn-area {
    text-align: right;
    margin-top: 1.5rem;
  }
  
  .next-btn {
    background: #bbe12a;
    color: #fff;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
  }
  
  .next-btn:hover {
    background: #859f1c;
  }


  /* ---- Navigation Buttons ---- */
  .nav-buttons {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
  }
  
  .nav-btn {
    display: inline-block;
    text-decoration: none;
    background: #bbe12a;
    color: #fff;
    padding: 0.8rem 1.4rem;
    border-radius: 8px;
    transition: 0.2s ease;
  }
  
  .nav-btn:hover {
    background: #859f1c;
  }
  

/* ---- Next/Prev Button Area ---- */
.next-btn-area {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
  }
  
  .next-btn, .prev-btn {
    display: inline-block;
    text-decoration: none;
    background: #f5f5f5;
    color: #333;
    padding: 0.9rem 1.6rem;
    border-radius: 8px;
    font-weight: 500;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    transition: 0.2s ease;
  }
  
  .next-btn:hover, .prev-btn:hover {
    background: #e2e2e2;
    transform: translateY(-2px);
  }
  
  /* --- 初期状態では非表示 --- */
.hidden {
    display: none;
  }
  
  /* --- 解説表示後に出る「次へ」「前へ」ボタンエリア --- */
  .next-btn-area {
    display: none;
    margin-top: 2rem;
    text-align: center;
  }
  
  .next-btn-area.show {
    display: flex;
    justify-content: center;
    gap: 1rem;
  }
  
  .next-btn,
  .prev-btn {
    display: inline-block;
    background-color: #bbe12a;
    color: #fff;
    padding: 0.8rem 1.4rem;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.2s;
  }
  
  .next-btn:hover,
  .prev-btn:hover {
    background: #859f1c;

  }
  
  /* --- トップに戻るボタンは常に中央 --- */
  .nav-buttons {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
  }