/* ============ Design tokens (palette đã kiểm định CVD) ============ */
:root {
  --surface-1: #ffffff;      /* card */
  --surface-2: #f9f9f7;      /* nền trang */
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --border: rgba(11,11,11,0.08);
  --brand: #2a78d6;
  --brand-2: #1baf7a;
  --good: #0ca30c;
  --warn: #eda100;
  --danger: #e34948;
  --shadow: 0 1px 2px rgba(11,11,11,.04), 0 4px 16px rgba(11,11,11,.05);
  --shadow-lg: 0 8px 30px rgba(11,11,11,.10);
  --radius: 14px;
}
html.dark {
  --surface-1: #1a1a19;
  --surface-2: #0d0d0d;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --grid: #2c2c2a;
  --border: rgba(255,255,255,0.09);
  --brand: #3987e5;
  --brand-2: #199e70;
  --good: #0ca30c;
  --warn: #c98500;
  --danger: #e66767;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 20px rgba(0,0,0,.35);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  background: var(--surface-2);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

/* ============ Sidebar ============ */
.nav-btn {
  display: flex; align-items: center; gap: 10px;
  width: 100%; text-align: left;
  padding: 10px 14px; border-radius: 10px;
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  background: transparent; border: none; cursor: pointer;
  transition: background .15s, color .15s, transform .1s;
}
.nav-btn:hover { background: color-mix(in srgb, var(--brand) 10%, transparent); color: var(--text-primary); }
.nav-btn:active { transform: scale(.98); }
.nav-btn.active {
  background: linear-gradient(135deg, var(--brand), color-mix(in srgb, var(--brand) 70%, #7c3aed));
  color: #fff; box-shadow: 0 4px 12px color-mix(in srgb, var(--brand) 40%, transparent);
}

/* ============ Cards ============ */
.uicard {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
  transition: box-shadow .2s, transform .2s;
}
.uicard:hover { box-shadow: var(--shadow-lg); }

/* KPI */
.kpi {
  position: relative; overflow: hidden;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  transition: transform .18s, box-shadow .18s;
}
.kpi:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.kpi::after {
  content: ""; position: absolute; right: -18px; top: -18px;
  width: 70px; height: 70px; border-radius: 50%;
  background: var(--kpi-accent, var(--brand)); opacity: .10;
}
.kpi .kpi-num { font-size: 26px; font-weight: 700; letter-spacing: -.02em; color: var(--text-primary); }
.kpi .kpi-lbl { font-size: 12px; color: var(--text-muted); margin-top: 4px; font-weight: 500; }
.kpi .kpi-ico { font-size: 18px; margin-bottom: 6px; display: block; }

/* ============ Bảng ============ */
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { text-align: left; padding: 11px 14px; }
.tbl thead th {
  font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-muted); font-weight: 600;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: var(--surface-1);
}
.tbl tbody tr { border-bottom: 1px solid var(--border); transition: background .12s; }
.tbl tbody tr:last-child { border-bottom: none; }
.tbl tbody tr:hover { background: color-mix(in srgb, var(--brand) 6%, transparent); }
.tbl td { font-variant-numeric: tabular-nums; }

/* ============ Inputs / buttons ============ */
.inp {
  padding: 8px 12px; border-radius: 10px; font-size: 13px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text-primary);
  width: 100%; transition: border-color .15s, box-shadow .15s; outline: none;
}
.inp:focus { border-color: var(--brand); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 20%, transparent); }
.btn {
  padding: 8px 14px; border-radius: 10px; font-size: 13px; font-weight: 600; cursor: pointer;
  border: none; background: var(--brand); color: #fff;
  transition: filter .15s, transform .1s; white-space: nowrap;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(.97); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-ghost { background: transparent; border: 1px solid var(--brand); color: var(--brand); }
.btn-danger { background: var(--danger); }

/* ============ Badge ============ */
.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; display: inline-block; }
.badge.delivered { background: color-mix(in srgb, var(--good) 18%, transparent); color: var(--good); }
.badge.pending   { background: color-mix(in srgb, var(--warn) 20%, transparent); color: var(--warn); }
.badge.paid      { background: color-mix(in srgb, var(--brand) 18%, transparent); color: var(--brand); }
.badge.cancelled { background: color-mix(in srgb, var(--danger) 18%, transparent); color: var(--danger); }

/* Chấm nhấp nháy "live" */
.live-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--danger); margin-right: 6px;
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--danger) 60%, transparent);
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--danger) 55%, transparent); }
  70% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* Fade-in cho nội dung tab */
.fade-in { animation: fadeIn .25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* Scrollbar mảnh */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--grid); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--grid) 25%, color-mix(in srgb, var(--grid) 50%, transparent) 50%, var(--grid) 75%);
  background-size: 200% 100%; animation: sk 1.2s infinite; border-radius: 8px;
}
@keyframes sk { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Badge danh mục trong bảng giao dịch */
.cat-chip {
  padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: color-mix(in srgb, var(--brand) 14%, transparent); color: var(--brand);
}

/* Responsive: màn nhỏ xếp dọc biểu đồ + ẩn bớt padding */
@media (max-width: 860px) {
  .chart-grid { grid-template-columns: 1fr !important; }
}