/* =========================================================================
   Style dùng chung cho khu vực quản trị (Admin) — Hai Ninh Shop demo
   ========================================================================= */

:root {
  --a-primary: #c1272d;
  --a-ink: #1f2430;
  --a-ink-soft: #6b7280;
  --a-border: #e5e7eb;
  --a-bg: #f4f5f7;
  --a-card: #ffffff;
  --a-sidebar: #171b26;
  --a-sidebar-soft: #9aa1b3;
  --a-radius: 10px;
  --a-shadow: 0 1px 4px rgba(15, 15, 20, 0.06);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--a-bg);
  color: var(--a-ink);
}
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
img { max-width: 100%; }

/* ---------- Layout đăng nhập ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #171b26, #3a2230);
}
.login-card {
  width: 360px;
  background: #fff;
  border-radius: 14px;
  padding: 36px 32px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.login-card h1 { font-size: 20px; text-align: center; margin: 0 0 4px; color: var(--a-primary); }
.login-card p.sub { text-align:center; color: var(--a-ink-soft); font-size: 13px; margin: 0 0 24px; }

/* ---------- Layout chính ---------- */
.admin-shell { display: flex; min-height: 100vh; }

.admin-sidebar {
  width: 230px;
  flex: none;
  background: var(--a-sidebar);
  color: #cfd2da;
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.admin-sidebar .brand {
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  padding: 6px 10px 20px;
  border-bottom: 1px solid #2b3040;
  margin-bottom: 14px;
}
.admin-sidebar .brand span { color: var(--a-primary); }
.admin-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--a-sidebar-soft);
  margin-bottom: 4px;
}
.admin-nav a:hover { background: #232838; color: #fff; }
.admin-nav a.active { background: var(--a-primary); color: #fff; }
.admin-nav .group-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #565d70;
  padding: 16px 12px 6px;
}
.sidebar-footer {
  margin-top: 24px;
  padding-top: 14px;
  border-top: 1px solid #2b3040;
}
.sidebar-footer a { color: #cfd2da; font-size: 13px; }

.admin-main { flex: 1; min-width: 0; }
.admin-topbar {
  height: 60px;
  background: var(--a-card);
  border-bottom: 1px solid var(--a-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.admin-topbar h1 { font-size: 17px; margin: 0; }
.admin-topbar .right { margin-left: auto; display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--a-ink-soft); }
.admin-content { padding: 24px; }

/* ---------- Cards & KPIs ---------- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-card {
  background: var(--a-card); border: 1px solid var(--a-border); border-radius: var(--a-radius);
  padding: 18px 20px; box-shadow: var(--a-shadow);
}
.kpi-card .label { font-size: 12px; color: var(--a-ink-soft); margin-bottom: 8px; }
.kpi-card .value { font-size: 24px; font-weight: 800; }
.kpi-card .delta { font-size: 12px; color: #16a34a; margin-top: 6px; }
.kpi-card .delta.down { color: var(--a-primary); }

.card {
  background: var(--a-card); border: 1px solid var(--a-border); border-radius: var(--a-radius);
  box-shadow: var(--a-shadow);
}
.card-head {
  padding: 16px 20px; border-bottom: 1px solid var(--a-border);
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.card-head h2 { font-size: 15px; margin: 0; }
.card-body { padding: 20px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 9px 16px; border-radius: 8px; border: none; font-size: 13px; font-weight: 700;
}
.btn-primary { background: var(--a-primary); color: #fff; }
.btn-primary:hover { background: #a31f24; }
.btn-outline { background: #fff; border: 1px solid var(--a-border); color: var(--a-ink); }
.btn-outline:hover { border-color: var(--a-ink); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 10px; font-size: 12px; }
.btn-danger-text { color: var(--a-primary); background: none; padding: 4px 6px; font-size: 12px; font-weight: 700; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data-table th {
  text-align: left; padding: 12px 14px; background: #fafbfc; border-bottom: 1px solid var(--a-border);
  color: var(--a-ink-soft); font-weight: 700; text-transform: uppercase; font-size: 11px; letter-spacing: .03em;
  white-space: nowrap;
}
table.data-table td { padding: 12px 14px; border-bottom: 1px solid var(--a-border); vertical-align: middle; }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background: #fafbfc; }
.cell-product { display: flex; align-items: center; gap: 10px; }
.cell-product img { width: 42px; height: 52px; object-fit: cover; border-radius: 6px; }

/* ---------- Badges ---------- */
.badge { display: inline-flex; padding: 4px 10px; border-radius: 999px; font-size: 11px; font-weight: 700; }
.badge-green { background: #dcfce7; color: #15803d; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-red { background: #fee2e2; color: #b91c1c; }
.badge-gray { background: #eef0f3; color: #4b5563; }

/* ---------- Forms ---------- */
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 6px; }
.form-row .hint { font-size: 12px; color: var(--a-ink-soft); font-weight: 400; margin-left: 6px; }
.form-row input[type=text], .form-row input[type=number], .form-row input[type=password],
.form-row textarea, .form-row select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--a-border); border-radius: 8px; font-size: 13px; font-family: inherit;
}
.form-row textarea { min-height: 90px; resize: vertical; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 8px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 13px; }

/* ---------- Variant editor (thêm/sửa sản phẩm) ---------- */
.variant-card { border: 1px solid var(--a-border); border-radius: var(--a-radius); padding: 16px; margin-bottom: 16px; background: #fcfcfd; }
.variant-card .variant-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.variant-card .variant-head b { font-size: 13px; }
.image-upload-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.image-thumb { width: 72px; height: 90px; border-radius: 8px; overflow: hidden; position: relative; border: 1px solid var(--a-border); }
.image-thumb img { width: 100%; height: 100%; object-fit: cover; }
.image-thumb .remove-x {
  position: absolute; top: 2px; right: 2px; background: rgba(0,0,0,.55); color: #fff;
  width: 18px; height: 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 11px;
}
.image-add-btn {
  width: 72px; height: 90px; border-radius: 8px; border: 1.5px dashed var(--a-border);
  display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--a-ink-soft); background: #fff;
}
.size-row-list { display: flex; flex-direction: column; gap: 8px; }
.size-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px; align-items: center; }
.size-row input { padding: 8px 10px; border: 1px solid var(--a-border); border-radius: 6px; font-size: 13px; }

/* ---------- Empty state ---------- */
.empty-note { text-align: center; padding: 40px 20px; color: var(--a-ink-soft); font-size: 13px; }

@media (max-width: 900px) {
  .admin-sidebar { display: none; }
  .form-grid-2, .form-grid-3 { grid-template-columns: 1fr; }
}