html {
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: "Arial", sans-serif;
  background-color: #f8f8f8;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}

.container {
  padding: 1em;
  max-width: 1200px;
  margin: auto;
}

h2 {
    position: relative;
    padding: 1rem;
    border-radius: 15px;
    border: 1px solid;
    border-bottom: 8px solid #0075c1;
    background-color: #ebefef;
    color: #333;
    font-weight: bold;
      font-size: 1.4em;
    text-align: center;
}

h2:before {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    height: 25px;
    width: 1px;
    background-color: #0075c1;
    content: "";
}

    .card-grid {
      display: grid;
      /*grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));*/
      gap: 1em;
      margin-top: 1em;
    }
.card-grid {
  display: grid;
  gap: 1em;
  margin-top: 1em;
  grid-template-columns: repeat(2, 1fr); /* デフォルトはスマホ：2列 */
}

@media (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr); /* PC：4列 */
  }
}
    .card {
      background-color: white;
      border-radius: 10px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      text-align: center;
      text-decoration: none;
      color: inherit;
      position: relative;
      overflow: hidden;
      padding-bottom: 1em;
    }
    .card.locked {
      color: #aaa;
      pointer-events: none;
      background-color: #f0f0f0;
    }
    .card img {
      width: 100%;
      height: auto;
      border-radius: 10px 10px 0 0;
      transition: filter 0.3s;
    }
    .card.locked img {
  /* まず白黒化（元々モノクロなら変化なし） */
  filter: grayscale(100%)
          /* コントラストを下げて黒を持ち上げる */
          contrast(60%)
          /* 全体を少しだけ明るく */
          brightness(110%);
    }
    .card-title {
      font-weight: bold;
      font-size: 1em;
      margin-top: 0.5em;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.4em;
      padding: 0 0.5em;
      text-align: center;
    }
    .card-subtitle {
      font-size: 0.85em;
      color: #555;
      padding: 0 0.5em;
    }
    .card-title .material-symbols-outlined {
      font-size: 1.2em;
      flex-shrink: 0;
    }
    .ict-section .card {
      border: 2px solid #0097d3;
      background-color: #e9f6fc;
    }
    .scratch-section .card {
      border: 2px solid #ff9800;
      background-color: #fff3e0;
    }
.intro-box {
  background-color: #fff8dc; /* 薄い黄色 */
  border: 2px solid #f6a13c; /* オレンジ色の枠線（全体） */
  padding: 1em 1.2em;
  border-radius: 12px; /* 丸み */
  margin-bottom: 1.5em;
  font-size: 1em;
  line-height: 1.6;
}

    /*ひとことICTカード用ここから*/
    .card-section.sc {
      border: 2px solid #8e24aa;
      background-color: #f3e5f5;
    }
    .card-section.ict {
      border: 2px solid #0097d3;
      background-color: #e1f5fe;
    }
    .card-section.sns {
      border: 2px solid #00acc1;
      background-color: #e0f7fa;
    }
    .card-section.dm {
      border: 2px solid #43a047;
      background-color: #e8f5e9;
    }
.material-symbols-outlined.viewed {
  color: #2e7d32; /* 緑っぽく */
}
    /*ひとことICTカード用ここまで*/

/* LINE公式アカウント友だち追加ボタン（パルス版） */
.line-friend-button {
  display: inline-block;
  background-color: #00C300;
  color: white;
  text-decoration: none;
  padding: 18px 32px;
  border-radius: 30px;
  font-weight: bold;
  font-size: 16px;
  line-height: 1.2;
  border: 3px solid #00C300;
  box-shadow: 0 0 0 0 rgba(0, 195, 0, 0.7);
  transition: all 0.3s ease;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 195, 0, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(0, 195, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 195, 0, 0);
  }
}

.line-friend-button:hover {
  background-color: #00A000;
  border-color: #00A000;
  animation: none;
}

.line-button-container {
  text-align: center;
  margin-top: 1.2em;
  margin-bottom: 0.5em;
}

/* フッター */
footer {
    background: #0075c1;  /* 背景色を#0075c1に変更 */
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 1rem;
    opacity: 0.9;
}

/* フッターテキストサイズ調整 */
footer p {
    font-size: 0.8rem;  /* コピーライト文字を小さく */
    margin-bottom: 0.5rem;
}

footer .version-info {
    font-size: 0.75rem;  /* バージョン情報をさらに小さく */
    opacity: 0.8;
    margin-top: 0.3rem;  /* 1remから0.3remに変更して間隔を狭く */
}

/* 開発用ボタン */
.dev-buttons {
  text-align: center;
  margin-top: 2em;
  margin-bottom: 1em;
  width: 100%;
  box-sizing: border-box;
}

.dev-button {
  background-color: #f5f5f5;
  color: #666;
  border: 1px solid #ddd;
  padding: 0.3em 0.6em;
  font-size: 12px;
  border-radius: 4px;
  margin: 0.25em 0.2em;
  cursor: pointer;
  transition: background-color 0.2s;
  display: inline-block;
}

.dev-button:hover {
  background-color: #e8e8e8;
  color: #555;
}

/* モバイル用の調整 */
@media (max-width: 767px) {
  .dev-buttons {
    padding: 0;
    margin-left: 0;
    margin-right: 0;
  }
  
  .dev-button {
    display: block;
    margin: 0.5em auto;
    width: auto;
    max-width: 95%;
    box-sizing: border-box;
    text-align: center;
  }
}

/* ヘッダー */
.pico-header {
  background-color: #0075c1;
  padding: 1em;
  text-align: center;
  /* 幅関連の設定を修正 */
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  margin-top: -1em;
  margin-bottom: 1em;
  width: 100vw;
  box-sizing: border-box;
}

.pico-header h1 {
  color: white;
  font-size: 1.2em;
  margin: 0;
  font-weight: bold;
  /* 確実に中央寄せ */
  text-align: center;
  width: 100%;
}

.pico-nav {
  margin-top: 0.5em;
  text-align: center;
  width: 100%;
}

.pico-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.9em;
  transition: color 0.2s;
}

.pico-nav a:hover {
  color: white;
}

.pico-nav span {
  color: white;
  font-size: 0.9em;
}