:root{
    --bg: #eef4f6;
    --panel: #ffffff;
    --panel-2: #eef2f5;
    --line: #d7dee3;
    --lens: #1c8fa6;
    --lens-soft: #dff2f5;
    --brass: #a97c1f;
    --text: #182029;
    --muted: #667180;
    --muted-2: #9aa3af;
  }


  .section-box{
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 18px;
    margin-bottom: 16px;
  }

  .label{
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 10px;
    color: var(--muted);
  }

  /* DROPZONE */
  .dropzone{
    border: 2px dashed var(--line);
    border-radius: 10px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease;
  }
  .dropzone:hover, .dropzone.dragover{
    border-color: var(--lens);
    background: var(--lens-soft);
  }
  .dropzone .icon{ font-size: 28px; margin-bottom: 8px; }
  .dropzone .main{ font-size: 14px; font-weight: 600; }
  .dropzone .sub{ font-size: 12px; color: var(--muted); margin-top: 4px; }
  input[type=file]{ display: none; }

  .dropzone .preview-img{
    display: none;
    max-width: 100%;
    max-height: 220px;
    border-radius: 8px;
    margin: 0 auto 12px;
  }
  .dropzone.has-preview .icon,
  .dropzone.has-preview .main,
  .dropzone.has-preview .sub{ display: none; }
  .dropzone.has-preview .preview-img{ display: block; }

  /* SETTINGS */
  .scale-picker{ display: flex; gap: 8px; flex-wrap: wrap; }
  .scale-chip{
    padding: 9px 18px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: var(--bg);
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
  }
  .scale-chip.active{
    background: var(--lens-soft);
    border-color: var(--lens);
    color: var(--lens);
  }

  .settings-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px;
    margin-top: 16px;
  }
  .field{ display: flex; flex-direction: column; gap: 6px; }
  .field .rowss{ display: flex; justify-content: space-between; align-items: baseline; }
  .field .val{ font-family: 'JetBrains Mono', monospace; color: var(--lens); font-size: 12px; }
  input[type=range]{ width: 100%; accent-color: var(--lens); }

  .dims-preview{
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    color: var(--muted);
    margin-top: 12px;
  }
  .dims-preview b{ color: var(--brass); }

  .btns{
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
  }

  .app{
    padding: 11px 22px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13.5px;
    font-family: 'Inter', sans-serif;
    color: #071013;
    background: linear-gradient(135deg, var(--lens), #7fdcef);
    transition: filter .15s ease;
  }
  .app:hover{ filter: brightness(1.08); }
  .app:disabled{ opacity: 0.5; cursor: not-allowed; }
  .gray{ background: var(--line); color: var(--text); }
  .brass-btn{ background: linear-gradient(135deg, var(--brass), #f5d989); color: #2b2005; }

  .empty-state{ text-align: center; color: var(--muted-2); padding: 30px 10px; font-size: 13.5px; }
  .loading{ text-align: center; padding: 30px 10px; color: var(--lens); font-family: 'JetBrains Mono', monospace; font-size: 13px; }

  /* COMPARISON SLIDER */
  .compare-wrap{
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    background:
      linear-gradient(45deg, #e5e2d8 25%, transparent 25%),
      linear-gradient(-45deg, #e5e2d8 25%, transparent 25%),
      linear-gradient(45deg, transparent 75%, #e5e2d8 75%),
      linear-gradient(-45deg, transparent 75%, #e5e2d8 75%);
    background-color: #ffffff;
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    user-select: none;
  }
  .compare-wrap img{
    display: block;
    width: 100%;
    height: auto;
  }
  .compare-after{
    position: absolute;
    top: 0; left: 0;
    height: 100%;
    overflow: hidden;
    width: 50%;
  }
  .compare-after img{ width: var(--full-w); max-width: none; height: 100%; object-fit: cover; }
  .compare-handle{
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    width: 3px;
    background: var(--brass);
    cursor: ew-resize;
    transform: translateX(-1.5px);
  }
  .compare-handle::after{
    content: "◂▸";
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--brass);
    color: #2b2005;
    width: 34px; height: 34px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px;
    letter-spacing: -2px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.5);
  }
  .compare-label{
    position: absolute;
    top: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px;
    letter-spacing: .5px;
    padding: 4px 10px;
    border-radius: 20px;
    background: rgba(12,17,22,0.75);
    color: #fff;
  }
  .compare-label.before{ left: 10px; }
  .compare-label.after{ right: 10px; }

  .result-stats{
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    color: var(--muted);
    flex-wrap: wrap;
  }
  .result-stats b{ color: var(--lens); }