:root {
  --bg: #f6f8fc;
  --card: #ffffff;
  --line: #e6eaf2;
  --text: #1c2433;
  --muted: #7b8498;
  --brand: #4f6ef7;
  --brand2: #7c5cff;
  --ok: #16a34a;
  --err: #dc2626;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(30, 50, 100, .06);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg); color: var(--text); min-height: 100vh;
}
.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px 300px at 15% -10%, rgba(79,110,247,.10), transparent 70%),
    radial-gradient(500px 260px at 90% 0%, rgba(124,92,255,.10), transparent 70%);
}
.wrap { max-width: 980px; margin: 0 auto; padding: 24px 20px 80px; }
.hidden { display: none !important; }

/* topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 980px; margin: 0 auto; padding: 18px 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff; font-size: 22px; font-weight: 800;
}
.brand-text b { font-size: 20px; letter-spacing: .3px; }
.brand-text span { display: block; font-size: 11px; color: var(--muted); margin-top: 1px; }
.userbox { display: flex; align-items: center; gap: 14px; }
.ub-bal { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.15; }
.ub-label { font-size: 11px; color: var(--muted); }
.ub-value { font-size: 16px; font-weight: 700; }
.ub-email { font-size: 13px; color: var(--muted); }

/* cards */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px; margin-bottom: 18px; animation: fade .25s ease;
}
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; } }
h1 { font-size: 26px; margin-bottom: 6px; }
h2 { font-size: 17px; margin-bottom: 4px; }
h3 { font-size: 13px; color: var(--muted); margin: 14px 0 6px; font-weight: 600; }
.sub { font-size: 13px; color: var(--muted); margin-bottom: 14px; }

/* auth */
.auth-card { max-width: 420px; margin: 60px auto 0; }
.tabbar { display: flex; gap: 8px; margin: 18px 0 16px; }
.tab {
  flex: 1; padding: 9px; border: 1px solid var(--line); background: #fff; border-radius: 10px;
  font-size: 14px; cursor: pointer; color: var(--muted); transition: all .15s;
}
.tab.active { color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand2)); border-color: transparent; }

/* forms */
.form { display: flex; flex-direction: column; gap: 8px; }
.form label { font-size: 12px; color: var(--muted); margin-top: 6px; }
input, select {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; font-size: 14px;
  background: #fff; color: var(--text); outline: none; transition: border .15s;
}
input:focus, select:focus { border-color: var(--brand); }
input { width: 100%; }

.row { display: flex; gap: 10px; margin: 10px 0; }
.row input { flex: 1; }

.btn {
  border: 0; border-radius: 10px; padding: 10px 18px; font-size: 14px; cursor: pointer;
  transition: all .15s; background: #eef1f8; color: var(--text);
}
.btn:hover { filter: brightness(.96); }
.btn.primary { background: linear-gradient(135deg, var(--brand), var(--brand2)); color: #fff; }
.btn.block { width: 100%; margin-top: 14px; padding: 12px; font-size: 15px; }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--muted); }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.err { color: var(--err); font-size: 13px; min-height: 18px; margin-top: 4px; }
.ok { color: var(--ok); font-size: 13px; margin-top: 4px; }

/* stats */
.grid-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.stat .s-label { font-size: 12px; color: var(--muted); }
.stat .s-value { font-size: 26px; font-weight: 800; margin: 4px 0 2px; font-variant-numeric: tabular-nums; }
.stat .s-sub { font-size: 12px; color: var(--muted); }

/* table */
.table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 8px; }
.table th { text-align: left; color: var(--muted); font-weight: 600; font-size: 12px; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.table td { padding: 9px 6px; border-bottom: 1px solid var(--line); vertical-align: middle; word-break: break-all; }
.table td.num { font-variant-numeric: tabular-nums; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 12px; background: #eef1f8; color: var(--muted); }
.tag.on { background: #e7f7ec; color: var(--ok); }
.tag.off { background: #fdecec; color: var(--err); }

/* guide */
.guide pre {
  background: #0f172a; color: #d6e2ff; padding: 12px 14px; border-radius: 10px;
  font-size: 12.5px; line-height: 1.55; overflow-x: auto; font-family: "Cascadia Code", Consolas, monospace;
}
.guide code { font-family: Consolas, monospace; background: #eef1f8; padding: 1px 6px; border-radius: 6px; }

.pill { font-size: 11px; color: var(--muted); background: #eef1f8; padding: 3px 10px; border-radius: 20px; font-weight: 500; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 20px 0 30px; }

@media (max-width: 720px) {
  .grid-stats { grid-template-columns: repeat(2, 1fr); }
  .table { font-size: 12px; }
}