:root { --ok:#16a34a; --offer:#d97706; --taken:#dc2626; --muted:#64748b; --line:#e2e8f0; }
  * { box-sizing: border-box; }
  body { font-family: "Segoe UI", system-ui, sans-serif; margin: 0; background:#f8fafc; color:#0f172a; }
  header { background:#0f172a; color:#fff; padding:14px 20px; }
  header h1 { font-size:18px; margin:0 0 2px; }
  header .sub { color:#94a3b8; font-size:12px; }
  main { padding:16px 20px; max-width:1360px; margin:0 auto; }
  .bar { display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin-bottom:12px; }
  button { cursor:pointer; border:0; border-radius:8px; padding:8px 14px; font-weight:600; font-size:13px; }
  button:disabled { background:#94a3b8 !important; color:#fff !important; cursor:wait; }
  .primary { background:#2563eb; color:#fff; }
  .ghost { background:#fff; color:#0f172a; border:1px solid var(--line); }
  label.fld { font-size:13px; color:#334155; display:flex; align-items:center; gap:6px; }
  input, select { border:1px solid var(--line); border-radius:8px; padding:7px 10px; font-size:13px; background:#fff; }
  .stats { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:12px; }
  .stat { background:#fff; border:1px solid var(--line); border-radius:8px; padding:6px 12px; font-size:13px; }
  .stat b { font-size:16px; display:block; }
  .stat.ok b { color:var(--ok); } .stat.offer b { color:var(--offer); } .stat.taken b { color:var(--taken); }
  .chip { background:#fff; border:1px solid var(--line); border-radius:999px; padding:6px 12px; font-size:13px; cursor:pointer; }
  .chip.active { background:#0f172a; color:#fff; border-color:#0f172a; }
  .progress { height:6px; background:var(--line); border-radius:4px; overflow:hidden; margin:4px 0 12px; }
  .progress > div { height:100%; background:#2563eb; width:0; transition:width .4s; }
  #scanInfo { font-size:12px; color:var(--muted); flex:1; min-width:220px; }
  #scanInfo.err { color:var(--taken); }
  table { width:100%; border-collapse:collapse; background:#fff; border:1px solid var(--line); border-radius:10px; overflow:hidden; font-size:13px; }
  thead th { position:sticky; top:0; background:#f1f5f9; text-align:left; padding:8px 10px; border-bottom:2px solid var(--line); white-space:nowrap; }
  tbody td { padding:7px 10px; border-bottom:1px solid var(--line); vertical-align:top; }
  tbody tr:hover { background:#f0f9ff; }
  .badge { display:inline-block; border-radius:6px; padding:3px 8px; font-weight:700; font-size:12px; white-space:nowrap; }
  .badge.available { background:#dcfce7; color:var(--ok); }
  .badge.for-sale { background:#fef3c7; color:var(--offer); }
  .badge.registered { background:#fee2e2; color:var(--taken); }
  .badge.unchecked { background:#f1f5f9; color:var(--muted); }
  .grade { font-weight:700; }
  .g-ok { color:var(--ok); } .g-kha { color:#65a30d; } .g-mid { color:var(--offer); } .g-bad { color:var(--taken); }
  a.domain { font-weight:700; color:#1d4ed8; text-decoration:none; }
  a.domain:hover { text-decoration:underline; }
  a.ncbtn { display:inline-block; background:#fff; color:#1d4ed8; border:1px solid var(--line); border-radius:8px; padding:4px 10px; font-size:12px; font-weight:600; text-decoration:none; white-space:nowrap; }
  a.ncbtn:hover { background:#eff6ff; border-color:#bfdbfe; }
  .muted { color:var(--muted); font-size:12px; }
  .overlay { position:fixed; inset:0; background:rgba(15,23,42,.55); display:none; align-items:flex-start; justify-content:center; padding:40px 16px; z-index:50; }
  .overlay.open { display:flex; }
  .modal { background:#fff; border-radius:14px; max-width:860px; width:100%; max-height:82vh; display:flex; flex-direction:column; box-shadow:0 20px 50px rgba(0,0,0,.3); }
  .modal-head { display:flex; align-items:center; justify-content:space-between; padding:14px 18px; border-bottom:1px solid var(--line); }
  .modal-head h3 { margin:0; font-size:16px; }
  .modal-close { background:#f1f5f9; color:#334155; border-radius:50%; width:30px; height:30px; padding:0; font-size:14px; }
  .modal-body { padding:14px 18px; overflow:auto; font-size:13px; }
  .modal-body table { margin-bottom:14px; }
  .modal-body h4 { margin:14px 0 6px; }
  .modal-foot { padding:12px 18px; border-top:1px solid var(--line); display:flex; gap:8px; justify-content:flex-end; }
  .combo { display:inline-block; margin:2px 6px 2px 0; background:#f8fafc; border:1px solid var(--line); border-radius:8px; padding:4px 8px; font-size:12px; }
  .combo b { font-size:13px; }
  .combo.good b { color:var(--ok); } .combo.bad b { color:var(--taken); }
  label.tld { background:#fff; border:1px solid var(--line); border-radius:8px; padding:5px 10px; cursor:pointer; user-select:none; }
  .wlist { display:flex; flex-direction:column; gap:4px; }
  .wlist textarea { border:1px solid var(--line); border-radius:8px; padding:8px 10px; font-size:13px; font-family:inherit; width:340px; resize:vertical; background:#fff; }
  .whead { display:flex; align-items:center; justify-content:space-between; gap:8px; font-size:13px; color:#334155; font-weight:600; }
  .mini { background:#0f172a; color:#fff; border-radius:999px; padding:3px 12px; font-size:11px; }
  .mini:hover { background:#2563eb; }
  code { background:#f1f5f9; border:1px solid var(--line); border-radius:5px; padding:1px 6px; font-size:12px; }
  .pprev { background:#0f172a; color:#e2e8f0; border-radius:8px; padding:7px 12px; font-size:13px; font-weight:600; white-space:nowrap; }
  .pprev b { color:#fde047; }
/* top menu */
header { position: relative; }
.topnav { position: absolute; right: 20px; top: 16px; display: flex; gap: 16px; }
.topnav a { color: #93c5fd; font-weight: 600; font-size: 13px; text-decoration: none; }
.topnav a:hover, .topnav a.on { text-decoration: underline; }

/* pager bảng kết quả */
.pager { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.pager button { background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; font-size: 13px; font-weight: 600; }
.pager button.on { background: #0f172a; color: #fff; border-color: #0f172a; }
.pager button:disabled { opacity: .4; cursor: default; }
.pager .pginfo { font-size: 12px; color: var(--muted); margin-left: 6px; }

/* trang blog / faq */
.page { max-width: 820px; margin: 0 auto; }
.page h2 { font-size: 20px; margin: 24px 0 6px; }
.page .meta { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.page p { line-height: 1.6; }
.page details { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin-bottom: 10px; }
.page details summary { font-weight: 700; cursor: pointer; }
.page details p { margin: 10px 0 0; color: #334155; }