:root{
    --bg:#0b1220;
    --panel:rgba(255,255,255,.06);
    --card:rgba(255,255,255,.05);
    --line:rgba(255,255,255,.10);
    --text:#eef4ff;
    --muted:#b9c6e4;
    --accent:#2563eb;
    --accent2:#06b6d4;
    --radius:18px;
  }
  
  *{box-sizing:border-box}
  html,body{height:100%}
  body{
    margin:0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    color:var(--text);
    background:
      radial-gradient(900px 450px at 20% 0%, rgba(37,99,235,.25), transparent 55%),
      radial-gradient(900px 450px at 80% 10%, rgba(6,182,212,.18), transparent 55%),
      var(--bg);
  }
  
  .app{min-height:100vh; display:flex; flex-direction:column}
  .topbar{
    height:72px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:14px 18px;
    border-bottom:1px solid var(--line);
    background: rgba(11,18,32,.70);
    backdrop-filter: blur(10px);
    position:sticky; top:0; z-index:10;
  }
  .brand-link{
    color:var(--text);
    text-decoration:none;
    font-weight:900;
    letter-spacing:.2px;
    font-size:18px;
  }
  
  .topbar-right{display:flex; align-items:center; gap:12px}
  .user-chip{
    display:flex; align-items:center; gap:10px;
    padding:10px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.06);
    border:1px solid var(--line);
    color:var(--text);
    font-size:13px;
  }
  .dot{
    width:10px; height:10px;
    border-radius:50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: 0 0 0 4px rgba(37,99,235,.12);
  }
  
  .shell{display:flex; flex:1; min-height:0}
  
  .sidebar{
    width:270px;
    padding:16px;
    border-right:1px solid var(--line);
    background: rgba(255,255,255,.03);
  }
  .menu-title{
    font-weight:800;
    margin:4px 0 12px;
    color:var(--muted);
    font-size:12px;
    text-transform:uppercase;
    letter-spacing:.9px;
  }
  .menu{display:flex; flex-direction:column; gap:8px}
  .menu-item{
    text-decoration:none;
    color:var(--text);
    padding:12px 12px;
    border-radius:14px;
    border:1px solid transparent;
    background: rgba(255,255,255,.03);
    transition:.18s ease;
  }
  .menu-item:hover{
    border-color: var(--line);
    background: rgba(255,255,255,.06);
  }
  .menu-item.active{
    background: rgba(37,99,235,.18);
    border-color: rgba(37,99,235,.35);
  }
  
  .content{
    flex:1;
    padding:18px;
    min-width:0;
  }
  
  /* Cards */
  .grid{
    display:grid;
    grid-template-columns: repeat(12, 1fr);
    gap:14px;
  }
  .col-6{grid-column: span 6}
  .col-12{grid-column: span 12}
  
  .card{
    background: var(--card);
    border:1px solid var(--line);
    border-radius: var(--radius);
    padding:16px;
    box-shadow: 0 10px 30px rgba(0,0,0,.25);
  }
  .card h3{margin:0 0 6px; font-size:16px}
  .card p{margin:0; color:var(--muted); font-size:13px; line-height:1.45}
  
  /* Buttons */
  .btn{
    border:none; cursor:pointer;
    padding:10px 14px;
    border-radius:12px;
    font-weight:800;
  }
  .btn-ghost{
    background: rgba(255,255,255,.06);
    border:1px solid var(--line);
    color:var(--text);
  }
  .btn-ghost:hover{background: rgba(255,255,255,.10)}
  
  .card-link{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:10px;
    text-decoration:none;
    color:inherit;
  }
  .badge{
    font-size:12px;
    padding:6px 10px;
    border-radius:999px;
    border:1px solid var(--line);
    background: rgba(255,255,255,.06);
    color:var(--text);
  }
  
  /* Responsive */
  @media (max-width: 900px){
    .shell{flex-direction:column}
    .sidebar{width:auto; border-right:none; border-bottom:1px solid var(--line)}
    .col-6{grid-column: span 12}
  }
  