@font-face {
  font-family: 'nasin-nanpa';
  src: url('nasin-nanpa.otf') format('opentype');
}

.keni {
  font-family: 'nasin-nanpa';
  font-size: 30px;
}

    body {
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
      background: linear-gradient(135deg, #0f1f4b, #1a2d6b);
      color: white;
      height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* ヘッダー */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      padding: 0px 40px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(255,255,255,0.15);
      box-sizing: border-box;
      z-index: 10;
    }

    .header-left {
      display: flex;
      padding: 14px 0;
      align-items: center;
      gap: 12px;
    }

    .header-left img {
      width: 38px;
      height: 38px;
      border-radius: 50%;
    }

    .header-left span {
      font-size: 20px;
      font-weight: 700;
    }

    .command-box {
  height: 100%;
  display: flex;
  align-items: center;
}


.command-box a {
  display: inline-block;
  padding: 22px 24px;
  color: white;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  background: rgba(0,0,0,0.35);
  transition: 0.15s;
}

.command-box a:hover {
  background: rgba(255,255,255,0.15);
}


    /* メイン2カラム */
    .main {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      padding: 0 8%;
      margin-top: 100px;
      box-sizing: border-box;
      gap: 40px;
      padding-bottom: 150px;
    }

    .left {
      flex: 1;
      max-width: 700px;
    }

    h1 {
      font-size: 52px;
      margin-bottom: 15px;
      font-weight: 900;
      line-height: 1.2;
    }

    p {
      font-size: 20px;
      opacity: 0.92;
      margin-bottom: 40px;
      line-height: 1.7;
    }

    .btn {
      display: block;
      width: 100%;
      padding: 14px 32px;
      background: #5865F2;
      color: white;
      text-decoration: none;
      border-radius: 12px;
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 18px;
      transition: 0.2s;
      text-align: center;
    }

    .btn:hover {
      background: #4752C4;
      transform: translateY(-2px);
    }

    .icon-box {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 22px;
      height: 22px;
      margin-right: 10px;
    }

    .icon-box svg {
      width: 20px;
      height: 20px;
    }

    .right {
      position: relative;
      width: 480px; /* 画像の幅に合わせる */
    }

    .img-base {
      width: 100%;
      border-radius: 12px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    }

    /* ⧉ のように “ほぼ同じ大きさでズラして重ねる” */
    .img-overlay {
      position: absolute;
      top: 200px;     /* ← 少し下へズラす */
      left: 100px;    /* ← 少し右へズラす */
      width: 100%;   /* ← 大きさは同じ */
      border-radius: 12px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    }

    /* 使い方セクション */
.howto {
  width: 100%;
  padding: 80px 8%;
  background: rgba(0, 0, 0, 0.25);
  margin-top: 60px;
  box-sizing: border-box;
}

.howto h2 {
  font-size: 40px;
  font-weight: 900;
  margin-bottom: 40px;
  text-align: center;
}

.steps {
  display: flex;
  justify-content: space-between;
  gap: 40px;
}

.step {
  flex: 1;
  background: rgba(255,255,255,0.08);
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.25);
  text-align: center;
}

.step h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.step p {
  font-size: 16px;
  opacity: 0.85;
  line-height: 1.6;
}

.footer {
  width: 100%;
  padding: 20px 0;
  text-align: center;
  background: rgba(0,0,0,0.35);
  border-top: 1px solid rgba(255,255,255,0.15);
  margin-top: 80px;
}

.footer p {
  margin: 0;
  font-size: 14px;
  opacity: 0.8;
}