.app-chart {
    --app-ink: #333;
    --app-muted: #667085;
    --app-blue: #1176d4;
    --app-navy: #15429b;
    --app-blue-soft: #eef6ff;
    --app-cream: #fdf9ee;
    --app-border: rgba(199, 199, 199, .62);
    --app-green: #62d847;
    --app-green-dark: #4aa235;
    box-sizing: border-box;
    width: 100%;
    max-width: 796px;
    margin: 32px auto;
    color: var(--app-ink);
    font-size: 15px;
    line-height: 1.8;
  }

  .app-chart *,
  .app-chart *::before,
  .app-chart *::after {
    box-sizing: border-box;
  }

  .app-chart__frame {
    overflow: hidden;
    border: 1px solid var(--app-border);
    border-top: 4px solid var(--app-navy);
    background: #fff;
  }

  /* JSの読み込み前から質問画面の高さを確保し、記事下部のCLSを防ぐ */
  .app-chart:not(.app-chart--result) .app-chart__frame {
    min-height: 768px;
  }

  .app-chart__header {
    padding: 20px 20px 17px;
    background: var(--app-cream);
    text-align: center;
  }

  .app-chart--result .app-chart__header {
    display: none;
  }

  .app-chart--result .app-chart__body {
    padding-top: 28px;
  }

  .app-chart__eyebrow {
    display: inline-block;
    margin: 0 0 5px;
    color: var(--app-navy);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .05em;
  }

  .app-chart__title {
    margin: 0;
    color: var(--app-ink);
    font-size: 21px;
    font-weight: 700;
    line-height: 1.45;
  }

  .app-chart__media {
    display: grid;
    width: min(100%, 560px);
    aspect-ratio: 16 / 9;
    margin: 15px auto 0;
    place-items: center;
    border: 1px dashed rgba(21, 66, 155, .42);
    background: #f4f8fc;
    color: var(--app-navy);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.5;
  }

  .app-chart__media--result {
    margin-top: 12px;
    margin-bottom: 18px;
  }

  .app-chart__media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .app-chart__media--has-image {
    border-style: solid;
    background: #fff;
  }

  .app-chart__lead {
    margin: 7px 0 0;
    color: #555;
    font-size: 14px;
    line-height: 1.7;
  }

  .app-chart__body {
    padding: 20px;
  }

  .app-chart__progress {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 17px;
  }

  .app-chart__step {
    flex: 0 0 auto;
    color: var(--app-navy);
    font-size: 13px;
    font-weight: 700;
    line-height: 1;
  }

  .app-chart__bar {
    overflow: hidden;
    width: 100%;
    height: 6px;
    border-radius: 999px;
    background: #e8edf3;
  }

  .app-chart__bar-fill {
    display: block;
    width: 50%;
    height: 100%;
    border-radius: inherit;
    background: var(--app-blue);
    transition: width .2s ease;
  }

  .app-chart__question {
    margin: 0 0 14px;
    font-size: 17px;
    font-weight: 700;
    line-height: 1.65;
    text-align: center;
  }

  .app-chart__choices {
    display: grid;
    gap: 10px;
  }

  .app-chart__choice {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 52px;
    padding: 11px 42px 11px 14px;
    border: 1px solid var(--app-border);
    border-radius: 3px;
    background: #fff;
    color: var(--app-ink);
    font: inherit;
    font-weight: 700;
    line-height: 1.55;
    text-align: left;
    cursor: pointer;
    transition: border-color .15s ease, background-color .15s ease, transform .15s ease;
  }

  .app-chart__choice::after {
    position: absolute;
    right: 16px;
    width: 9px;
    height: 9px;
    border-top: 2px solid var(--app-blue);
    border-right: 2px solid var(--app-blue);
    content: "";
    transform: rotate(45deg);
  }

  .app-chart__choice:hover {
    border-color: var(--app-blue);
    background: var(--app-blue-soft);
    transform: translateY(-1px);
  }

  .app-chart__choice:focus-visible,
  .app-chart__primary:focus-visible,
  .app-chart__reset:focus-visible,
  .app-chart__back:focus-visible {
    outline: 3px solid rgba(17, 118, 212, .28);
    outline-offset: 2px;
  }

  .app-chart__nav {
    margin-top: 14px;
    text-align: center;
  }

  .app-chart__back,
  .app-chart__reset {
    min-height: 44px;
    padding: 8px 12px;
    border: 0;
    background: transparent;
    color: var(--app-blue);
    font: inherit;
    font-size: 14px;
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
  }

  .app-chart__result {
    text-align: center;
  }

  .app-chart__result-label {
    margin: 0;
    color: var(--app-navy);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .04em;
  }

  .app-chart__result-name {
    margin: 3px 0 10px;
    color: var(--app-navy);
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
  }

  .app-chart__result-reason {
    margin: 0 auto 18px;
    max-width: 620px;
    text-align: left;
  }

  .app-chart__primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: min(100%, 312px);
    min-height: 52px;
    padding: 12px 24px;
    border: 0;
    border-radius: 80px;
    background: var(--app-green);
    box-shadow: 0 4px 0 var(--app-green-dark);
    color: #fff !important;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
    text-decoration: none !important;
    transition: filter .15s ease, transform .15s ease, box-shadow .15s ease;
  }

  .app-chart__primary:hover {
    filter: brightness(.98);
    transform: translateY(2px);
    box-shadow: 0 2px 0 var(--app-green-dark);
  }

  .app-chart__note {
    margin: 17px 0 0;
    color: var(--app-muted);
    font-size: 12px;
    line-height: 1.65;
    text-align: center;
  }

  .app-chart [hidden] {
    display: none !important;
  }

  @media (max-width: 599px) {
    .app-chart {
      margin: 28px 0;
    }

    .app-chart__header,
    .app-chart__body {
      padding: 16px;
    }

    .app-chart:not(.app-chart--result) .app-chart__frame {
      min-height: 680px;
    }

    .app-chart--result .app-chart__body {
      padding-top: 24px;
    }

    .app-chart__title {
      font-size: 20px;
    }

    .app-chart__question {
      font-size: 16px;
      text-align: left;
    }

    .app-chart__choice {
      padding-left: 13px;
      font-size: 15px;
    }

    .app-chart__result-name {
      font-size: 24px;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .app-chart__bar-fill,
    .app-chart__choice,
    .app-chart__primary {
      transition: none;
    }
  }