:root{
      --ink:#0b0b0c;
      --paper:#fbfaf7;
      --line: rgba(11,11,12,.08);
      --shadow: 0 18px 48px rgba(11,11,12,.10);
      --shadow2: 0 10px 26px rgba(11,11,12,.10);
      --radius: 22px;

      /* premium blue theme (like the dashboard reference) */
      --blue:#2563eb;
      --blue2:#60a5fa;
      --ice:#eaf2ff;
      --ice2:#f6fbff;
    }

    html, body { height: 100%; }
    body { font-family: 'Inter', sans-serif; color: var(--ink); }

    .bg-premium{
      background:
        radial-gradient(1400px 560px at 18% 8%, rgba(96,165,250,.30), rgba(255,255,255,0) 60%),
        radial-gradient(1200px 520px at 92% 12%, rgba(37,99,235,.22), rgba(255,255,255,0) 55%),
        radial-gradient(1100px 620px at 55% 100%, rgba(234,242,255,.95), rgba(255,255,255,0) 60%),
        linear-gradient(180deg, #f6fbff 0%, #ffffff 55%, #f7fbff 100%);
    }

    .shell {
      border-radius: 26px;
      background: rgba(255,255,255,.78);
      border: 1px solid rgba(11,11,12,.08);
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }

    .panel {
      border-radius: var(--radius);
      background: rgba(255,255,255,.92);
      border: 1px solid rgba(11,11,12,.06);
      box-shadow: var(--shadow2);
    }

    .chip {
      border-radius: 999px;
      background: rgba(255,255,255,.8);
      border: 1px solid rgba(11,11,12,.08);
    }

    .btn {
      border-radius: 16px;
      transition: transform .16s ease, box-shadow .16s ease, opacity .16s ease;
    }
    .btn:hover { transform: translateY(-1px); box-shadow: 0 18px 48px rgba(11,11,12,.10); }

    .drawer.hidden { display:none; }