:root, [data-theme="dark"]{
    --bg:#10141a;
    --bg-panel:#171d25;
    --bg-panel-2:#1e262f;
    --bg-panel-3:#232b35;
    --border:#2a323d;
    --border-strong:#3a4552;
    --text:#e6eaf0;
    --text-secondary:#9aa5b3;
    --text-muted:#5f6a78;
    --accent:#1E90FF;
    /* --accent:#3ddbc4; */
    --accent-dim:#1c8f7e;
    --accent-ink:#08201b;
    --accent-bg:rgba(61,219,196,0.1);
    --amber:#f0a840;
    --amber-bg:rgba(240,168,64,0.12);
    --red:#e2574c;
    --red-bg:rgba(226,87,76,0.12);
    --green:#59c97a;
    --radius:10px;
    --shadow:none;
  }
  [data-theme="light"]{
    --bg:#f4f5f7;
    --bg-panel:#ffffff;
    --bg-panel-2:#f1f2f5;
    --bg-panel-3:#e7e9ed;
    --border:#dfe2e7;
    --border-strong:#c7ccd3;
    --text:#1b2027;
    --text-secondary:#525b68;
    --text-muted:#8b93a1;
      --accent:#1E90FF;
   /* --accent:#0ea895;*/
    --accent-dim:#0c8879;
    --accent-ink:#ffffff;
    --accent-bg:rgba(14,168,149,0.1);
    --amber:#c67c11;
    --amber-bg:rgba(198,124,17,0.12);
    --red:#c33327;
    --red-bg:rgba(195,51,39,0.1);
    --green:#2f9455;
    --radius:10px;
    --shadow:0 1px 2px rgba(20,24,30,0.06);
  }
  *{box-sizing:border-box;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:'Inter',system-ui,sans-serif;
    -webkit-font-smoothing:antialiased;
    transition:background .15s ease, color .15s ease;
  }
  .wrap{max-width:1080px;margin:0 auto;padding:28px 20px 64px;}

  header.top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px;}
  .brand{display:flex;align-items:center;gap:12px;}
  .brand .mark{
    width:38px;height:38px;border-radius:9px;
    background:linear-gradient(160deg,var(--accent) 0%, var(--accent-dim) 100%);
    display:flex;align-items:center;justify-content:center;
    font-family:'IBM Plex Mono',monospace;font-weight:600;color:var(--accent-ink);font-size:15px;
    flex:none;
  }
  .brand h1{font-family:'Space Grotesk',sans-serif;font-size:20px;font-weight:600;margin:0;letter-spacing:0.2px;}
  .brand p{margin:2px 0 0;font-size:12.5px;color:var(--text-muted);font-family:'IBM Plex Mono',monospace;}
  .brand .logocap{
     width:64px;height:64px;
     background-image: url(../images/logo64.png);
    
      display:flex;align-items:center;justify-content:center;
       flex:none;

  }
  .io-actions{display:flex;gap:8px;align-items:center;}
  .btn{
    appearance:none;border:1px solid var(--border-strong);background:var(--bg-panel-2);
    color:var(--text);padding:8px 13px;border-radius:8px;font-size:13px;font-family:'Inter',sans-serif;
    cursor:pointer;display:inline-flex;align-items:center;gap:7px;transition:background .12s,border-color .12s;
    box-shadow:var(--shadow);
  }
  .btn:hover{background:var(--bg-panel-3);border-color:var(--text-muted);}
  .btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600;}
  .btn.primary:hover{filter:brightness(1.06);}
  .btn.danger-ghost{color:var(--red);}
  .btn.danger-ghost:hover{background:var(--red-bg);border-color:var(--red);}
  .btn.small{padding:5px 9px;font-size:12px;border-radius:6px;}
  .btn.icon-only{padding:8px;width:34px;height:34px;justify-content:center;}
  input[type=file]{display:none;}

  nav.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:22px;overflow-x:auto;}
  nav.tabs button{
    background:none;border:none;color:var(--text-muted);padding:10px 4px;margin-right:22px;
    font-family:'Space Grotesk',sans-serif;font-size:14px;font-weight:600;cursor:pointer;
    border-bottom:2px solid transparent;white-space:nowrap;
  }
  nav.tabs button.active{color:var(--text);border-bottom-color:var(--accent);}
  nav.tabs button:hover{color:var(--text);}

  .panel{display:none;}
  .panel.active{display:block;}

  /* rack overview (signature element) */
  .rack{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-bottom:26px;}
  .cell{
    background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);
    padding:10px 10px 12px;box-shadow:var(--shadow);
  }
  .cell .set-label{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--text-muted);margin-bottom:6px;}
  .cell .pair{display:flex;gap:6px;}
  .slot{flex:1;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:7px;padding:7px 8px;}
  .slot .id{font-family:'IBM Plex Mono',monospace;font-size:12.5px;font-weight:600;}
  .slot .bar{height:4px;border-radius:2px;background:var(--border-strong);margin-top:6px;overflow:hidden;}
  .slot .bar span{display:block;height:100%;background:var(--accent);}
  .slot .cyc{font-size:10.5px;color:var(--text-muted);margin-top:4px;font-family:'IBM Plex Mono',monospace;}

  h2.section-title{font-family:'Space Grotesk',sans-serif;font-size:16px;font-weight:600;margin:0 0 4px;}
  p.section-sub{color:var(--text-secondary);font-size:13px;margin:0 0 16px;}

  table{width:100%;border-collapse:collapse;font-size:13.5px;}
  thead th{
    text-align:left;color:var(--text-muted);font-weight:500;font-size:11.5px;text-transform:uppercase;
    letter-spacing:0.04em;padding:0 10px 8px;border-bottom:1px solid var(--border);
  }
  tbody td{padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:middle;}
  tbody tr:hover{background:var(--bg-panel-2);}
  tbody tr.set-divider td{border-top:1px solid var(--border-strong);}

  input[type=text],input[type=date],input[type=number],select,textarea{
    background:var(--bg-panel-2);border:1px solid var(--border);color:var(--text);
    border-radius:6px;padding:7px 9px;font-size:13.5px;font-family:'Inter',sans-serif;width:100%;
  }
  input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);}
  input.mono,td.mono,.mono{font-family:'IBM Plex Mono',monospace;}

  .badge{
    display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600;
    font-family:'IBM Plex Mono',monospace;
  }
  .badge.ok{background:var(--accent-bg);color:var(--accent-dim);}
  .badge.warn{background:var(--amber-bg);color:var(--amber);}
  .badge.risk{background:var(--red-bg);color:var(--red);}

  .card{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin-bottom:20px;box-shadow:var(--shadow);}
  .form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;align-items:end;}
  .form-grid label{display:block;font-size:11.5px;color:var(--text-muted);margin-bottom:5px;text-transform:uppercase;letter-spacing:0.03em;}
  .form-grid .full{grid-column:1/-1;}

  .icon-btn{
    background:none;border:1px solid var(--border);color:var(--text-muted);width:28px;height:28px;
    border-radius:6px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:13px;
  }
  .icon-btn:hover{border-color:var(--red);color:var(--red);}


  .stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px;}
  .stat{background:var(--bg-panel);border:1px solid var(--border);border-radius:10px;padding:14px 16px;box-shadow:var(--shadow);}
  .stat .label{font-size:11.5px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.03em;}
  .stat .value{font-family:'Space Grotesk',sans-serif;font-size:22px;font-weight:600;margin-top:4px;}

  .doc-grid{
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 15px;
    margin-bottom: 20px;
  
  }
  .doc{
    display: flex;
    flex-direction: column;
    background:var(--bg-panel);border:1px solid var(--border);border-radius:10px;padding:14px 16px;box-shadow:var(--shadow);
  align-items: center;
  gap: 12px;
  }


  .doc .label{align-self: flex-start; font-size:11.5px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.03em;}


  .toast{
    position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(0);
    background:var(--bg-panel-3);border:1px solid var(--border-strong);color:var(--text);
    padding:10px 18px;border-radius:8px;font-size:13px;opacity:0;pointer-events:none;
    transition:opacity .2s, transform .2s;z-index:50;
  }
  .toast.show{opacity:1;transform:translateX(-50%) translateY(-6px);}

  .empty{color:var(--text-muted);font-size:13px;padding:18px 4px;text-align:center;}

  .theme-toggle svg{display:block;width:16px;height:16px;}
  .theme-toggle .icon-moon{display:none;}
  [data-theme="dark"] .theme-toggle .icon-sun{display:none;}
  [data-theme="dark"] .theme-toggle .icon-moon{display:block;}

  @media (max-width:760px){
    .rack{grid-template-columns:repeat(2,1fr);}
    .form-grid{grid-template-columns:1fr 1fr;}
    .stat-grid{grid-template-columns:1fr 1fr;}
    table thead{display:none;}
    table, tbody, tr, td{display:block;width:100%;}
    tbody tr{border-bottom:1px solid var(--border);padding:8px 0;}
    tbody td{border-bottom:none;padding:4px 2px;}
    tbody td::before{content:attr(data-label);display:block;font-size:10.5px;color:var(--text-muted);text-transform:uppercase;margin-bottom:2px;}
  }