/* progress.css — plotline progress bar. Extracted from index.html <style> (src 150-247). Load 3/7. */
  /* ── PLOTLINE PROGRESS BAR ─────────────────────────────── */
  .plotline-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.94);
    backdrop-filter: blur(14px) saturate(145%);
    -webkit-backdrop-filter: blur(14px) saturate(145%);
    border-bottom: 1px solid var(--trace);
    padding: 0 40px;
    height: 56px;
    display: flex;
    align-items: center;
    gap: 0;
    transform: translateY(0);
    opacity: 1;
    transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.28s ease, background 0.28s ease;
  }

  body.hero-idle .plotline-bar {
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
  }

  body.hero-idle #section-open {
    padding-top: 0;
  }

  .plotline-step {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    position: relative;
  }

  .plotline-step:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: var(--trace);
  }

  .step-num {
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #9A9184;
    width: 22px;
    height: 22px;
    border: 1px solid #DAD2C6;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s ease;
  }

  .step-label {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #8C857A;
    transition: color 0.3s ease;
    white-space: nowrap;
  }

  .plotline-step.active .step-num {
    background: var(--forest);
    border-color: var(--forest);
    color: var(--pure);
  }

  .plotline-step.active .step-label {
    color: var(--ink);
  }

  .plotline-step.done .step-num {
    background: var(--forest);
    border-color: var(--forest);
    color: var(--pure);
  }

  .plotline-step.done .step-label {
    color: var(--mid);
  }