/* Design tokens + custom styles cho mockup KiotViet clone */
:root {
  --brand: #12B886;
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --topnav: #33475B;
  --topnav-active: #22303F;
  --surface-muted: #F5F7FA;
  --muted: #F1F5F9;
  --border: #E2E8F0;
  --input-border: #CBD5E1;
  --foreground: #1E293B;
  --muted-foreground: #64748B;
  --placeholder: #94A3B8;
  --success: #16A34A;
  --success-bg: #DCFCE7;
  --warning: #D97706;
  --warning-bg: #FEF3C7;
  --danger: #DC2626;
  --danger-bg: #FEE2E2;
  --info: #2563EB;
  --info-bg: #DBEAFE;
  --teal: #0D9488;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, 'Segoe UI', Roboto, sans-serif;
  color: var(--foreground);
  font-size: 14px;
  background: var(--surface-muted);
  -webkit-font-smoothing: antialiased;
}
.num { font-variant-numeric: tabular-nums; text-align: right; }
.money-neg { color: var(--danger); }

/* Topnav */
.topnav { background: var(--topnav); }
#topnav { display: flex; } /* desktop: menu ngang; mobile media-query sẽ ẩn/hiện qua .nav-open */
.nav-item { color: #E5EBF1; padding: 14px 14px; cursor: pointer; font-size: 14px; white-space: nowrap; border-bottom: 2px solid transparent; }
.nav-item:hover { color: #fff; background: rgba(255,255,255,.06); }
.nav-item.active { background: var(--topnav-active); color: #fff; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; height: 36px; padding: 0 14px; border-radius: 8px; font-size: 14px; cursor: pointer; border: 1px solid transparent; font-weight: 500; transition: .12s; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: #fff; color: var(--foreground); border-color: var(--input-border); }
.btn-outline:hover { background: var(--muted); }
.btn-ghost { background: transparent; color: var(--foreground); }
.btn-ghost:hover { background: var(--muted); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { height: 30px; padding: 0 10px; font-size: 13px; }
.btn-lg { height: 48px; font-size: 16px; }

/* Inputs */
.input, .select { height: 36px; border: 1px solid var(--input-border); border-radius: 6px; padding: 0 10px; width: 100%; font-size: 14px; background: #fff; color: var(--foreground); outline: none; }
.input:focus, .select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.2); }
.input::placeholder { color: var(--placeholder); }
.search-wrap { position: relative; }
.search-wrap .input { padding-left: 34px; }
.search-wrap svg { position: absolute; left: 10px; top: 9px; color: var(--placeholder); }

/* Labels */
.flabel { font-size: 13px; color: var(--muted-foreground); margin-bottom: 6px; display: block; }

/* Table */
table.data { width: 100%; border-collapse: collapse; background: #fff; }
table.data thead th { background: var(--surface-muted); color: var(--muted-foreground); font-size: 13px; font-weight: 500; padding: 10px 12px; text-align: left; position: sticky; top: 0; z-index: 1; border-bottom: 1px solid var(--border); }
table.data tbody td { padding: 11px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
table.data tbody tr.rowclick { cursor: pointer; }
table.data tbody tr.rowclick:hover { background: var(--muted); }
table.data tr.total-row td { font-weight: 600; background: var(--surface-muted); }
.expand-panel { border: 2px solid var(--primary); border-radius: 8px; margin: 4px 0; background: #fff; }

/* Badge */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 6px; font-size: 12px; font-weight: 500; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-muted { background: var(--muted); color: var(--muted-foreground); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }

/* Card */
.card { background: #fff; border-radius: 12px; box-shadow: 0 1px 2px rgba(15,23,42,.06); padding: 20px; }

/* Tabs */
.tab { padding: 10px 4px; margin-right: 20px; cursor: pointer; font-size: 14px; color: var(--muted-foreground); border-bottom: 2px solid transparent; }
.tab.active { color: var(--foreground); font-weight: 600; border-bottom-color: var(--primary); }

/* Sidebar filter */
.filter-sidebar { width: 220px; background: #fff; border-right: 1px solid var(--border); padding: 16px; overflow-y: auto; flex-shrink: 0; }
.chip { display: inline-flex; align-items: center; gap: 4px; background: var(--muted); border-radius: 6px; padding: 3px 8px; font-size: 12px; margin: 0 4px 4px 0; }
.chip button { border: none; background: none; cursor: pointer; color: var(--muted-foreground); }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; z-index: 50; overflow-y: auto; }
.modal { background: #fff; border-radius: 12px; box-shadow: 0 12px 32px rgba(15,23,42,.16); width: 100%; max-width: 900px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--border); }
.modal-body { padding: 24px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; padding: 16px 24px; border-top: 1px solid var(--border); }
.section-box { border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-bottom: 16px; }
.section-title { font-weight: 600; margin-bottom: 12px; }

.hidden { display: none !important; }
.radio-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 14px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 14px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 60px; color: var(--muted-foreground); gap: 12px; }

/* POS */
.pos-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px,1fr)); gap: 12px; }
.pos-product { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 10px; text-align: center; cursor: pointer; font-size: 12px; transition: .1s; }
.pos-product:hover { border-color: var(--primary); box-shadow: 0 2px 8px rgba(37,99,235,.15); }
.pos-thumb { width: 44px; height: 44px; margin: 0 auto 6px; border-radius: 6px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 600; }

/* ============ RESPONSIVE ============ */
/* Phần tử chỉ hiện trên mobile - mặc định ẩn ở desktop */
.nav-toggle, .filter-fab, .filter-backdrop { display: none; }
.toolbar { flex-wrap: wrap; }

@media (max-width: 820px) {
  /* Topnav -> hamburger */
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: transparent; border: none; color: #fff; font-size: 22px; cursor: pointer; }
  #topnav { position: fixed; top: 52px; left: 0; right: 0; background: var(--topnav); flex-direction: column; display: none; z-index: 46; box-shadow: 0 10px 24px rgba(0,0,0,.28); max-height: calc(100vh - 52px); overflow: auto; }
  body.nav-open #topnav { display: flex; }
  #topnav .nav-item { border-bottom: 1px solid rgba(255,255,255,.08); padding: 14px 18px; }
  .topnav > div { min-height: 52px; }

  /* Filter sidebar -> drawer trượt từ trái */
  .filter-sidebar { position: fixed; top: 52px; left: 0; bottom: 0; width: 260px; z-index: 48; transform: translateX(-100%); transition: transform .22s ease; box-shadow: 0 0 28px rgba(0,0,0,.25); }
  body.filters-open .filter-sidebar { transform: translateX(0); }
  .filter-backdrop { position: fixed; inset: 52px 0 0 0; background: rgba(15,23,42,.45); z-index: 47; }
  body.filters-open .filter-backdrop { display: block; }
  body.has-filters .filter-fab { display: inline-flex; align-items: center; gap: 6px; position: fixed; left: 14px; bottom: 14px; z-index: 44; box-shadow: 0 4px 12px rgba(15,23,42,.25); }

  /* Bảng cuộn ngang, không bóp méo cột */
  table.data { min-width: 720px; }

  /* Dashboard xếp dọc */
  .dash-grid { grid-template-columns: 1fr !important; }

  /* Toolbar tiêu đề nhỏ lại, search full hàng */
  .toolbar .search-wrap { flex: 1 1 100%; max-width: none !important; order: 3; }
}

@media (max-width: 560px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr !important; }
  .toolbar h1 { font-size: 17px !important; min-width: auto !important; }
  .modal { max-width: 100% !important; }
  .btn { padding: 0 10px; }
  .pos-user-info { display: none !important; }
}

/* POS xếp dọc trên mobile */
@media (max-width: 820px) {
  .pos-body { flex-direction: column !important; }
  .pos-main { flex: none !important; height: 44% !important; }
  .pos-cart { width: 100% !important; flex: 1 1 auto !important; border-left: none !important; border-top: 1px solid var(--border) !important; }
  .pos-header { flex-wrap: wrap !important; }
}

/* Chống tràn ngang header + dashboard trên mobile */
@media (max-width: 820px) {
  .hide-mobile { display: none !important; }        /* ẩn chuông + cài đặt */
  .topnav > div { padding: 0 10px !important; gap: 8px; }
  .dash-cards { grid-template-columns: 1fr !important; } /* Top hàng/khách xếp dọc */
}
@media (max-width: 480px) {
  .brand-text { display: none !important; }          /* hẹp quá thì ẩn chữ, giữ logo */
}