/* === ERP Styles === */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --sidebar-bg: #1a1a2e;
    --sidebar-text: #ccc;
    --sidebar-active: #16213e;
    --primary: #0f3460;
    --accent: #e94560;
    --bg: #f0f2f5;
    --card-bg: #fff;
    --border: #e0e0e0;
    --text: #333;
    --text-light: #888;
    --green: #27ae60;
    --orange: #f39c12;
    --red: #e74c3c;
    --blue: #3498db;
}
body { font-family: -apple-system, 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* Layout */
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--sidebar-bg); color: var(--sidebar-text); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh; }
.sidebar-header { padding: 24px 20px; border-bottom: 1px solid rgba(255,255,255,.1); }
.sidebar-header h2 { font-size: 1.2rem; margin-bottom: 4px; color: #fff; }
.sidebar-header p { font-size: .8rem; color: #888; }
.sidebar-nav { flex: 1; padding: 12px 0; }
.sidebar-nav a { display: block; padding: 12px 20px; color: #aaa; text-decoration: none; transition: all .2s; }
.sidebar-nav a:hover { background: rgba(255,255,255,.05); color: #fff; }
.sidebar-nav a.active { background: var(--sidebar-active); color: #fff; border-left: 3px solid var(--accent); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.1); display: flex; justify-content: space-between; font-size: .85rem; }

.main-content { flex: 1; margin-left: 240px; padding: 24px 32px; }

/* Login page */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--sidebar-bg); }
.login-card { background: #fff; padding: 48px; border-radius: 12px; width: 400px; box-shadow: 0 4px 24px rgba(0,0,0,.15); }
.login-card h1 { text-align: center; margin-bottom: 4px; font-size: 1.4rem; }
.login-card .subtitle { text-align: center; color: var(--text-light); margin-bottom: 32px; }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h1 { font-size: 1.5rem; font-weight: 600; }
.header-actions { display: flex; gap: 8px; align-items: center; }

/* Cards */
.card { background: var(--card-bg); border-radius: 8px; padding: 20px; box-shadow: 0 1px 4px rgba(0,0,0,.06); }
.card h3 { font-size: 1rem; margin-bottom: 16px; color: var(--text); }

/* Stat cards */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card-bg); border-radius: 8px; padding: 20px; box-shadow: 0 1px 4px rgba(0,0,0,.06); border-left: 4px solid; }
.stat-card.blue { border-color: var(--blue); }
.stat-card.green { border-color: var(--green); }
.stat-card.orange { border-color: var(--orange); }
.stat-card.red { border-color: var(--red); }
.stat-number { font-size: 1.8rem; font-weight: 700; margin-bottom: 4px; }
.stat-label { color: var(--text-light); font-size: .85rem; }

/* Grid */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* Tables */
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border); color: var(--text-light); font-weight: 600; font-size: .8rem; text-transform: none; }
.table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table tbody tr:hover { background: #f8f9fa; }
.table a { color: var(--blue); text-decoration: none; }
.table a:hover { text-decoration: underline; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 4px; font-weight: 500; font-size: .9rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: .9rem; font-family: inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.inline-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.input-sm { padding: 6px 8px; border: 1px solid var(--border); border-radius: 4px; font-size: .85rem; }

/* Buttons */
.btn-primary, button[type="submit"] { padding: 10px 24px; background: var(--primary); color: #fff; border: none; border-radius: 6px; cursor: pointer; font-size: .9rem; font-family: inherit; }
.btn-primary:hover { opacity: .9; }
.btn-sm { display: inline-block; padding: 5px 12px; background: var(--primary); color: #fff; border: none; border-radius: 4px; cursor: pointer; font-size: .8rem; text-decoration: none; font-family: inherit; }
.btn-sm:hover { opacity: .85; }

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: .8rem; }
.badge-draft { background: #f0f0f0; color: #666; }
.badge-active { background: #d4edda; color: #155724; }
.badge-archived { background: #f8d7da; color: #721c24; }
.badge-pending { background: #fff3cd; color: #856404; }
.badge-confirmed { background: #d4edda; color: #155724; }
.badge-processing { background: #cce5ff; color: #004085; }
.badge-shipped { background: #d4edda; color: #155724; }
.badge-delivered { background: #d4edda; color: #155724; }
.badge-cancelled { background: #f8d7da; color: #721c24; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.alert-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

/* Misc */
.empty { text-align: center; padding: 40px 0; color: var(--text-light); }
.danger { color: var(--red); font-weight: 600; }
.warning { color: var(--orange); font-weight: 600; }
.row-warning { background: #fffbf0; }
.total-row { text-align: right; margin-top: 12px; font-size: 1.1rem; font-weight: 600; }
.pagination { text-align: center; margin-top: 16px; color: var(--text-light); font-size: .85rem; }
.product-form h3 { margin-top: 24px; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); font-size: 1rem; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar-header p, .sidebar-nav a span, .sidebar-footer span { display: none; }
    .main-content { margin-left: 60px; padding: 16px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .stat-cards { grid-template-columns: 1fr 1fr; }
}