:root{
    --paper:      #0c1f2e;
    --paper-2:    #12283a;
    --paper-3:    #17334a;
    --line:       rgba(151, 196, 224, 0.14);
    --line-strong:rgba(151, 196, 224, 0.32);
    --ink:        #dce9f2;
    --ink-dim:    #8ba7bb;
    --cyan:       #5fd0c8;
    --amber:      #f2924a;
    --red:        #ef6a5b;
    --mono: 'IBM Plex Mono', 'Menlo', monospace;
    --sans: 'IBM Plex Sans', -apple-system, sans-serif;
  }
  @font-face{ font-family:'IBM Plex Mono'; src: local('IBM Plex Mono'); }
  * { box-sizing:border-box; }
  html,body{
    margin:0; height:100%; background:var(--paper); color:var(--ink);
    font-family:var(--sans); overflow:hidden;
  }
  #app{ display:flex; flex-direction:column; height:100%; }

  header{
    display:flex; align-items:center; gap:20px;
    padding:10px 18px; background:var(--paper-2);
    border-bottom:1px solid var(--line-strong);
    flex-shrink:0;
  }
  .brand{ display:flex; align-items:baseline; gap:8px; }
  .brand-mark{ font-family:var(--mono); font-size:13px; color:var(--cyan); letter-spacing:2px; }
  .brand-name{ font-family:var(--mono); font-weight:600; font-size:15px; letter-spacing:0.5px;}
  .brand-sub{ font-size:11px; color:var(--ink-dim); }
  header .spacer{ flex:1; }
  .process-tag{
    font-family:var(--mono); font-size:11px; color:var(--ink-dim);
    border:1px solid var(--line-strong); padding:4px 10px; border-radius:2px;
    letter-spacing:0.5px;
  }

  main{ flex:1; display:flex; min-height:0; }

  #viewport{ flex:1; position:relative; background:radial-gradient(ellipse at 50% 40%, #102436 0%, #081722 100%); }
  #viewport canvas{ display:block; }
  #viewport-hint{
    position:absolute; bottom:14px; left:14px; font-family:var(--mono);
    font-size:10.5px; color:var(--ink-dim); line-height:1.6; pointer-events:none;
  }
  #drop-overlay{
    position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
    flex-direction:column; gap:14px; text-align:center;
  }
  #drop-overlay .ring{
    width:64px; height:64px; border:1.5px dashed var(--line-strong); border-radius:50%;
    display:flex; align-items:center; justify-content:center; font-size:22px; color:var(--cyan);
  }
  #drop-overlay h2{ font-weight:500; font-size:16px; margin:0; }
  #drop-overlay p{ font-size:12.5px; color:var(--ink-dim); margin:0; max-width:340px; line-height:1.6;}
  .btn{
    font-family:var(--sans); font-size:13px; padding:8px 16px; border-radius:3px;
    border:1px solid var(--line-strong); background:var(--paper-3); color:var(--ink);
    cursor:pointer; transition: all .15s ease;
  }
  .btn:hover{ border-color:var(--cyan); color:var(--cyan); }
  .btn.primary{ background:var(--cyan); color:#04211d; border-color:var(--cyan); font-weight:600;}
  .btn.primary:hover{ filter:brightness(1.08); color:#04211d;}
  .btn.ghost{ background:transparent; font-size:11.5px; padding:5px 10px;}
  .btn.small{ font-size:11.5px; padding:5px 10px;}

  #sidebar{
    width:360px; flex-shrink:0; background:var(--paper-2); border-left:1px solid var(--line-strong);
    display:flex; flex-direction:column; overflow-y:auto;
  }
  .panel{ padding:16px 18px; border-bottom:1px solid var(--line); }
  .panel h3{
    font-family:var(--mono); font-size:10.5px; letter-spacing:1.5px; text-transform:uppercase;
    color:var(--ink-dim); margin:0 0 12px 0; display:flex; align-items:center; gap:8px;
  }
  .panel h3::after{ content:''; flex:1; height:1px; background:var(--line); }

  .field{ margin-bottom:10px; }
  .field label{ display:block; font-size:11.5px; color:var(--ink-dim); margin-bottom:4px; }
  select, input[type=number]{
    width:100%; background:var(--paper-3); border:1px solid var(--line-strong); color:var(--ink);
    padding:7px 8px; border-radius:3px; font-family:var(--sans); font-size:13px;
  }
  .row2{ display:grid; grid-template-columns:1fr 1fr; gap:10px; }

  table.thresh{ width:100%; border-collapse:collapse; font-size:11.5px; }
  table.thresh th{ text-align:left; color:var(--ink-dim); font-weight:500; padding:4px 0; font-size:10.5px; }
  table.thresh td{ padding:4px 0; border-top:1px solid var(--line); }
  table.thresh input{ width:52px; padding:3px 5px; font-size:11.5px; }
  table.thresh .std{ color:var(--ink-dim); font-family:var(--mono); font-size:10.5px; }

  #results{ flex:1; }
  .result-item{
    border:1px solid var(--line); border-radius:4px; padding:10px 12px; margin-bottom:8px;
    cursor:pointer; transition: border-color .15s ease, background .15s ease;
    background:rgba(255,255,255,0.015);
  }
  .result-item:hover{ border-color:var(--line-strong); background:rgba(255,255,255,0.03); }
  .result-item.active{ border-color:var(--cyan); }
  .result-head{ display:flex; align-items:center; gap:8px; margin-bottom:3px; }
  .badge{
    font-family:var(--mono); font-size:9.5px; letter-spacing:0.5px; padding:2px 6px; border-radius:2px;
    font-weight:600;
  }
  .badge.pass{ background:rgba(95,208,200,0.15); color:var(--cyan); }
  .badge.fail{ background:rgba(239,106,91,0.15); color:var(--red); }
  .badge.flag{ background:rgba(242,146,74,0.15); color:var(--amber); }
  .result-title{ font-size:12.5px; font-weight:500; flex:1; }
  .result-detail{ font-size:11.5px; color:var(--ink-dim); font-family:var(--mono); padding-left:2px;}
  .result-note{ font-size:11px; color:var(--ink-dim); margin-top:4px; line-height:1.5; }

  #summary-bar{
    display:flex; gap:0; margin-bottom:14px; border:1px solid var(--line-strong); border-radius:4px; overflow:hidden;
  }
  .sum-cell{ flex:1; padding:10px 8px; text-align:center; border-right:1px solid var(--line); }
  .sum-cell:last-child{ border-right:none; }
  .sum-num{ font-family:var(--mono); font-size:20px; font-weight:600; display:block; }
  .sum-label{ font-size:9.5px; color:var(--ink-dim); text-transform:uppercase; letter-spacing:0.5px; }
  .sum-cell.pass .sum-num{ color:var(--cyan); }
  .sum-cell.fail .sum-num{ color:var(--red); }
  .sum-cell.flag .sum-num{ color:var(--amber); }

  #empty-state{ padding:24px 18px; color:var(--ink-dim); font-size:12.5px; line-height:1.7; }
  .disclosure{
    font-size:11px; color:var(--ink-dim); line-height:1.6; margin-top:14px; padding-top:12px;
    border-top:1px solid var(--line);
  }
  #loading-overlay{
    position:absolute; inset:0; display:none; align-items:center; justify-content:center;
    background:rgba(8,20,30,0.7); font-family:var(--mono); font-size:12px; color:var(--cyan);
    letter-spacing:1px;
  }
  ::-webkit-scrollbar{ width:8px; }
  ::-webkit-scrollbar-thumb{ background:var(--line-strong); border-radius:4px; }
  ::-webkit-scrollbar-track{ background:transparent; }