body{
    background: var(--color-bg);
    background-image:
      radial-gradient(circle at 10% 8%, rgba(58,16,120,0.05), transparent 40%),
      radial-gradient(circle at 90% 85%, rgba(255,107,53,0.06), transparent 40%);
    color: var(--color-ink);
    font-family: var(--font-body);
    line-height: 1.75;
    min-height: 100vh;
  }
  .diag-page{
    display:flex;
    justify-content:center;
    padding: 40px 16px 80px;
  }

  .diag{
    width: 100%;
    max-width: 640px;
  }

  /* ---------- Header ---------- */
  .diag__eyebrow{
    display:flex;
    align-items:center;
    gap:8px;
    font-size: 13px;
    color: var(--color-purple-soft);
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
  }
  .diag__eyebrow-mark{
    width: 18px; height: 18px;
    flex-shrink: 0;
  }
  .diag__title{
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(24px, 5vw, 32px);
    color: var(--color-purple);
    margin: 0 0 10px;
    letter-spacing: 0.02em;
  }
  .diag__lead{
    font-size: 14.5px;
    color: var(--color-ink-soft);
    margin: 0 0 28px;
  }

  /* ---------- Progress (signature element: まめすけが歩く) ---------- */
  .diag__progress{
    position: relative;
    margin-bottom: 32px;
  }
  .diag__progress-track{
    height: 6px;
    border-radius: 999px;
    background: var(--color-purple-tint);
    overflow: visible;
    position: relative;
  }
  .diag__progress-fill{
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--color-purple), var(--color-purple-soft));
    width: 0%;
    transition: width 0.5s cubic-bezier(.65,0,.35,1);
  }
  .diag__progress-mascot{
    position: absolute;
    top: 50%;
    left: 0%;
    transform: translate(-50%, -50%);
    width: 34px;
    height: 34px;
    transition: left 0.5s cubic-bezier(.65,0,.35,1);
    filter: drop-shadow(0 3px 6px rgba(58,16,120,0.25));
  }
  .diag__progress-label{
    display:flex;
    justify-content: space-between;
    margin-top: 14px;
    font-size: 12.5px;
    color: var(--color-ink-soft);
    font-weight: 500;
  }
  .diag__progress-label strong{
    color: var(--color-purple);
    font-weight: 700;
  }

  /* ---------- Card ---------- */
  .diag__card{
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 32px 28px;
    border: 1px solid var(--color-line);
  }

  /* ---------- Question ---------- */
  .diag__question{
    display: none;
  }
  .diag__question--active{
    display: block;
    animation: diagFadeIn 0.4s ease;
  }
  @keyframes diagFadeIn{
    from{ opacity: 0; transform: translateY(6px); }
    to{ opacity: 1; transform: translateY(0); }
  }
  .diag__question-num{
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 700;
    color: var(--color-orange);
    margin-bottom: 8px;
    display:block;
  }
  .diag__question-text{
    font-size: 17px;
    font-weight: 700;
    color: var(--color-ink);
    margin: 0 0 20px;
    line-height: 1.6;
  }

  .diag__options{
    display: flex;
    flex-direction: column;
    gap: 10px;
    list-style: none;
    margin: 0 0 28px;
    padding: 0;
  }
  .diag__option{
    position: relative;
  }
  .diag__option-input{
    position: absolute;
    opacity: 0;
    width: 0; height: 0;
  }
  .diag__option-label{
    display: block;
    padding: 14px 16px;
    border: 1.5px solid var(--color-line);
    border-radius: var(--radius-md);
    font-size: 14.5px;
    color: var(--color-ink);
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--color-bg);
  }
  .diag__option-label:hover{
    border-color: var(--color-purple-soft);
    background: var(--color-purple-tint);
  }
  .diag__option-input:checked + .diag__option-label{
    border-color: var(--color-purple);
    background: var(--color-purple-tint);
    color: var(--color-purple);
    font-weight: 700;
  }
  .diag__option-input:focus-visible + .diag__option-label{
    outline: 2px solid var(--color-orange);
    outline-offset: 2px;
  }

  .diag__nav{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
  }
  .diag__btn{
    font-family: var(--font-body);
    font-size: 14.5px;
    font-weight: 700;
    padding: 12px 22px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.15s ease;
  }
  .diag__btn:disabled{
    opacity: 0.35;
    cursor: not-allowed;
  }
  .diag__btn:not(:disabled):hover{
    transform: translateY(-1px);
  }
  .diag__btn--ghost{
    background: transparent;
    color: var(--color-ink-soft);
  }
  .diag__btn--primary{
    background: var(--color-purple);
    color: #fff;
  }
  .diag__btn--cta{
    background: var(--color-orange);
    color: #fff;
  }

  /* ---------- Result ---------- */
  .diag__result{
    display: none;
  }
  .diag__result--active{
    display: block;
    animation: diagFadeIn 0.5s ease;
  }
  .diag__result-badge{
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 700;
    margin-bottom: 16px;
  }
  .diag__result-badge--static{
    background: var(--color-teal-tint);
    color: var(--color-teal);
  }
  .diag__result-badge--wp{
    background: var(--color-purple-result-tint);
    color: var(--color-purple);
  }
  .diag__result-badge--hybrid{
    background: #FFF1E8;
    color: var(--color-orange);
  }
  .diag__result-title{
    font-family: var(--font-display);
    font-size: clamp(22px, 5vw, 28px);
    font-weight: 800;
    color: var(--color-ink);
    margin: 0 0 14px;
    line-height: 1.5;
  }
  .diag__result-desc{
    font-size: 14.5px;
    color: var(--color-ink-soft);
    margin: 0 0 24px;
  }
  .diag__result-points{
    list-style: none;
    padding: 0;
    margin: 0 0 28px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .diag__result-points li{
    display: flex;
    gap: 10px;
    font-size: 13.5px;
    color: var(--color-ink);
    padding: 12px 14px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-line);
  }
  .diag__result-points li::before{
    content: "";
    flex-shrink: 0;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--color-orange);
    margin-top: 6px;
  }
  .diag__result-actions{
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
  }
  .diag__result-cta{
    flex: 1 1 auto;
    text-align: center;
    text-decoration: none;
    display: block;
  }
  .diag__result-share{
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12.5px;
    color: var(--color-ink-soft);
    padding-top: 16px;
    border-top: 1px dashed var(--color-line);
  }
  .diag__share-btn{
    background: var(--color-purple-tint);
    color: var(--color-purple);
    border: none;
    border-radius: 999px;
    padding: 8px 16px;
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
  }
  .diag__retry{
    text-align: center;
    margin-top: 18px;
  }
  .diag__retry button{
    background: none;
    border: none;
    color: var(--color-ink-soft);
    font-size: 13px;
    text-decoration: underline;
    cursor: pointer;
  }

  @media (prefers-reduced-motion: reduce){
    .diag__question--active, .diag__result--active{ animation: none; }
    .diag__progress-fill, .diag__progress-mascot{ transition: none; }
  }

  @media (max-width: 480px){
    .diag__card{ padding: 24px 18px; }
  }