:root {
  /* Green palette */
  --color-primary: #1f8a4c;
  --color-primary-dark: #14532d;
  --color-primary-light: #e8f7ef;
  --color-primary-hover: #17753f;

  --color-white: #ffffff;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #eef1f0;
  --color-gray-300: #d1d7d4;
  --color-gray-500: #6b7370;
  --color-gray-700: #3a3f3d;
  --color-gray-900: #1c1f1e;

  /* Status colors */
  --color-normal: #1f8a4c;
  --color-low-stock: #d97706;
  --color-out-of-stock: #dc2626;
  --color-info: #2563eb;

  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-base);
  background: var(--color-gray-50);
  color: var(--color-gray-900);
  -webkit-tap-highlight-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 48px; /* touch-friendly */
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-block { width: 100%; }

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-normal { background: #e8f7ef; color: var(--color-normal); }
.badge-low { background: #fef3c7; color: var(--color-low-stock); }
.badge-out { background: #fee2e2; color: var(--color-out-of-stock); }
.badge-info { background: #dbeafe; color: var(--color-info); }

input, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  min-height: 44px;
}

.form-group { margin-bottom: 16px; }
.form-label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.9rem; color: var(--color-gray-700); }

/* Toolbar / filters */
.toolbar {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.filters { display: flex; flex-wrap: wrap; gap: 8px; flex: 1; }
.filters input, .filters select { width: auto; min-width: 160px; }

/* Data table */
.table-wrap { overflow-x: auto; background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.data-table th {
  text-align: left; padding: 12px 16px; background: var(--color-gray-50);
  color: var(--color-gray-700); font-weight: 600; border-bottom: 1px solid var(--color-gray-100);
  white-space: nowrap;
}
table.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--color-gray-100); vertical-align: middle; }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background: var(--color-gray-50); }

.link-action { color: var(--color-primary); text-decoration: none; font-weight: 600; font-size: 0.85rem; margin-right: 10px; }
.link-action.danger { color: var(--color-out-of-stock); }
.link-action:hover { text-decoration: underline; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--color-gray-500); }

.alert-success { background: #e8f7ef; color: var(--color-primary-dark); padding: 10px 14px; border-radius: var(--radius-md); margin-bottom: 16px; font-size: 0.9rem; }
.alert-error { background: #fee2e2; color: var(--color-out-of-stock); padding: 10px 14px; border-radius: var(--radius-md); margin-bottom: 16px; font-size: 0.9rem; }