/* ── Prompt Builder tab ─────────────────────────────────────────────────── */
          .pb-layout { padding:24px; max-width:960px; margin:0 auto; }
  .pb-hero { text-align:center; padding:32px 0 24px; }
  .pb-hero h2 { font-size:22px; font-weight:700; margin-bottom:8px; }
  .pb-hero p { font-size:14px; color:var(--muted); max-width:520px; margin:0 auto; }

  .pb-card { background:var(--surface); border:1px solid var(--border); border-radius:14px;
    overflow:hidden; margin-bottom:20px; }
  .pb-card-header { padding:14px 20px; border-bottom:1px solid var(--border);
    font-size:13px; font-weight:600; display:flex; align-items:center; gap:8px; }

  .pb-idea-wrap { padding:20px; }
  .pb-idea-textarea { width:100%; min-height:100px; background:var(--border-subtle);
    border:1px solid var(--border); border-radius:10px; color:var(--text);
    padding:14px 16px; font-size:14px; font-family:var(--sans); resize:vertical;
    transition:border-color 0.15s; }
  .pb-idea-textarea:focus { outline:none; border-color:var(--accent); }
  .pb-idea-textarea::placeholder { color:var(--muted); }

  .pb-examples { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
  .pb-example { font-size:11px; padding:5px 10px; border-radius:20px;
    border:1px solid var(--border); color:var(--muted); cursor:pointer;
    transition:all 0.15s; }
  .pb-example:hover { border-color:var(--accent); color:var(--accent); }

  .pb-options { display:grid; grid-template-columns:1fr 1fr 1fr 1fr; gap:12px;
    padding:0 20px 16px; }
  .pb-option { display:flex; flex-direction:column; gap:5px; }
  .pb-option label { font-size:11px; font-weight:600; color:var(--muted);
    text-transform:uppercase; letter-spacing:0.05em; }
  .pb-option select { background:var(--border-subtle); border:1px solid var(--border);
    border-radius:8px; color:var(--text); padding:7px 10px; font-size:13px; }

  .pb-generate-btn { display:flex; align-items:center; justify-content:center; gap:8px;
    width:calc(100% - 40px); margin:0 20px 20px; padding:12px;
    background:var(--accent); color:var(--text-inverted); border:none; border-radius:10px;
    font-size:14px; font-weight:600; cursor:pointer; transition:all 0.15s; }
  .pb-generate-btn:hover { background:var(--accent-hover); transform:translateY(-1px); }
  .pb-generate-btn:disabled { opacity:0.5; cursor:not-allowed; transform:none; }
  .pb-generate-btn .spinner { width:16px; height:16px; border:2px solid var(--border-subtle);
    border-top-color:var(--text-inverted); border-radius:50%; animation:spin 0.8s linear infinite; display:none; }
  .pb-generate-btn.loading .spinner { display:block; }
  .pb-generate-btn.loading .btn-text { opacity:0.7; }
  @keyframes spin { to { transform:rotate(360deg); } }

  .pb-result { display:none; }
  .pb-result.visible { display:block; }
  .pb-result-section { padding:20px; border-bottom:1px solid var(--border); }
  .pb-result-section:last-child { border-bottom:none; }
  .pb-result-label { font-size:11px; font-weight:600; color:var(--muted);
    text-transform:uppercase; letter-spacing:0.05em; margin-bottom:8px;
    display:flex; justify-content:space-between; align-items:center; }
  .pb-result-text { background:var(--border-subtle); border:1px solid var(--border);
    border-radius:8px; padding:12px 14px; font-size:13px; line-height:1.6;
    white-space:pre-wrap; font-family:var(--sans); min-height:48px; }
  .pb-copy-btn { font-size:10px; padding:3px 8px; border-radius:4px;
    border:1px solid var(--border); background:transparent; color:var(--muted);
    cursor:pointer; transition:all 0.15s; }
  .pb-copy-btn:hover { border-color:var(--accent); color:var(--accent); }
  .pb-copy-btn.copied { border-color:var(--green); color:var(--green); }

  .pb-meta-row { display:grid; grid-template-columns:1fr 1fr 1fr; gap:12px;
    padding:16px 20px; border-bottom:1px solid var(--border); }
  .pb-meta-item { background:var(--border-subtle); border-radius:8px; padding:10px 14px; }
  .pb-meta-label { font-size:10px; color:var(--muted); text-transform:uppercase;
    letter-spacing:0.05em; margin-bottom:4px; }
  .pb-meta-value { font-size:13px; font-weight:600; }

  .pb-use-btn { display:flex; align-items:center; justify-content:center; gap:8px;
    width:calc(100% - 40px); margin:16px 20px; padding:11px;
    background:var(--success-bg-tint); color:var(--green);
    border:1px solid var(--success-border); border-radius:10px;
    font-size:13px; font-weight:600; cursor:pointer; transition:all 0.15s; }
  .pb-use-btn:hover { background:var(--success-border); }

  .pb-streaming { font-size:13px; color:var(--muted); font-style:italic;
    padding:16px 20px; display:none; }
  .pb-streaming.visible { display:block; }