/* ══════════════════════════════════════
     FILE UPLOAD AREA
  ══════════════════════════════════════ */
  .upload-zone {
    border: 2.5px dashed var(--color-grey-300);
    border-radius: 16px;
    padding: var(--spacing-4);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--color-accent-5);
    position: relative;
  }

  .upload-zone:hover, .upload-zone.has-file {
    border-color: var(--color-core-1);
    background: white;
    box-shadow: 0 4px 20px rgba(161,0,255,0.08);
  }

  .upload-icon {
    font-size: 40px;
    margin-bottom: 12px;
    display: block;
  }

  .upload-label {
    font-family: var(--font-graphik-bold);
    font-size: 14px;
    font-weight: 700;
    color: var(--color-core-1);
    margin-bottom: 4px;
  }

  .upload-hint { font-size: 12px; color: var(--color-grey-600); }

  .file-info {
    display: none;
    align-items: center;
    gap: 10px;
    background: #e8fff0;
    border: 1.5px solid var(--color-success-dark);
    border-radius: 10px;
    padding: 10px var(--spacing-2);
    margin-top: 12px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-success-light);
  }

  .file-info.visible { display: flex; }

  input[type="file"] { display: none; }

  /* ══════════════════════════════════════
     INPUT APPROACH SPLIT LAYOUT
  ══════════════════════════════════════ */
  .approach-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
  }

  .approach-card {
    border-radius: 16px;
    border: 2px solid var(--color-grey-300);
    padding: 28px var(--spacing-3);
    background: white;
    position: relative;
    overflow: hidden;
  }

  .approach-card.top-down::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--color-core-2), var(--color-core-1));
  }

  .approach-card.bottom-up::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--color-sec-green-dark), #00b894);
  }

  .approach-title {
    font-family: var(--font-graphik-bold);
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 4px;
  }

  .top-down .approach-title { color: var(--color-core-1); }
  .bottom-up .approach-title { color: #00917a; }

  .approach-desc {
    font-size: 12px;
    color: var(--color-grey-600);
    margin-bottom: var(--spacing-2-5);
    line-height: 1.5;
  }