:root {
  --color-primary: #1a56db;
  --color-primary-dark: #133a99;
  --color-bg: #f5f6fa;
  --color-border: #e2e5ec;
  --color-text: #1f2430;
  --color-text-muted: #6b7280;
  --color-danger: #dc2626;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
}

/* Topbar */
.admin-topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 12px 24px;
}
.admin-topbar__brand { font-weight: 700; }
.admin-topbar__nav { display: flex; gap: 16px; flex: 1; }
.admin-topbar__nav a { color: var(--color-text); text-decoration: none; }
.admin-topbar__nav a:hover { color: var(--color-primary); }
.admin-topbar__logout button {
  background: none; border: 1px solid var(--color-border); border-radius: 6px;
  padding: 6px 12px; cursor: pointer;
}

.admin-content { max-width: 1100px; margin: 0 auto; padding: 24px; }

/* Login */
.login-page {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
}
.login-box {
  background: #fff; padding: 32px; border-radius: 10px; width: 320px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08); display: flex; flex-direction: column; gap: 14px;
}
.login-box h1 { margin: 0; font-size: 1.4rem; }
.login-box__subtitle { margin: 0 0 8px; color: var(--color-text-muted); }

/* Forms */
label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; margin-bottom: 14px; }
.checkbox-label { flex-direction: row; align-items: center; gap: 8px; }
input, select, textarea {
  padding: 9px 10px; border: 1px solid var(--color-border); border-radius: 6px; font-size: 0.95rem;
}
.form-row { display: flex; gap: 16px; }
.form-row label { flex: 1; }
.form-actions { display: flex; gap: 10px; margin-top: 8px; }

button, .btn {
  display: inline-block; padding: 9px 16px; border-radius: 6px; border: 1px solid var(--color-border);
  background: #fff; color: var(--color-text); cursor: pointer; text-decoration: none; font-size: 0.9rem;
}
.btn--primary, .login-box button {
  background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}
.btn--primary:hover, .login-box button:hover { background: var(--color-primary-dark); }

.alert { padding: 10px 12px; border-radius: 6px; margin-bottom: 10px; font-size: 0.9rem; }
.alert--error { background: #fde8e8; color: var(--color-danger); }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

/* Table */
.data-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; }
.data-table th, .data-table td {
  text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); font-size: 0.9rem;
}
.data-table th { background: #fafbfc; color: var(--color-text-muted); font-weight: 600; }
.data-table__actions { display: flex; gap: 10px; }
.data-table__actions form { display: inline; }
.data-table__actions button { border: none; background: none; color: var(--color-danger); cursor: pointer; padding: 0; }

/* Dashboard cards */
.cards-grid { display: flex; gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: #fff; border-radius: 8px; padding: 20px 24px; flex: 1; text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.stat-card__value { display: block; font-size: 2rem; font-weight: 700; color: var(--color-primary); }
.stat-card__label { color: var(--color-text-muted); font-size: 0.85rem; }

.image-preview { display: flex; gap: 8px; margin-bottom: 14px; }
.image-preview img { width: 70px; height: 70px; object-fit: cover; border-radius: 6px; border: 1px solid var(--color-border); }

/* Barcode lookup */
.barcode-lookup {
  background: #fff;
  border: 2px dashed var(--color-primary);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 24px;
}
.barcode-lookup h3 { margin: 0 0 4px; font-size: 1rem; }
.barcode-lookup .text-muted { margin: 0 0 12px; font-size: 0.85rem; color: var(--color-text-muted); }
.barcode-lookup__row { display: flex; gap: 8px; }
.barcode-lookup__row input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: monospace;
  letter-spacing: 0.05em;
}
.barcode-lookup__row input:focus { outline: none; border-color: var(--color-primary); }
.barcode-lookup__status {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
}
.barcode-status--loading { background: #e8f0fe; color: #1a56db; }
.barcode-status--success { background: #d1fae5; color: #065f46; }
.barcode-status--warning { background: #fef3c7; color: #92400e; }
.barcode-status--error { background: #fee2e2; color: #991b1b; }