:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --border: #e2e8f0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    margin: 0;
    line-height: 1.5;
}

.container { max-width: 1100px; margin: 0 auto; padding: 2rem 1rem; }

/* Navbar */
.nav { background: var(--card-bg); border-bottom: 1px solid var(--border); padding: 1rem 0; position: sticky; top: 0; z-index: 50; }
.nav-content { display: flex; justify-content: space-between; align-items: center; max-width: 1100px; margin: 0 auto; padding: 0 1rem; }
.logo { font-weight: 800; font-size: 1.5rem; color: var(--primary); text-decoration: none; }

/* Cards & Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.card { background: var(--card-bg); padding: 1.5rem; border-radius: 0.75rem; border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.stat-label { color: var(--text-muted); font-size: 0.875rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.025em; }
.stat-value { font-size: 1.875rem; font-weight: 700; margin-top: 0.25rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; padding: 0.625rem 1.25rem; border-radius: 0.5rem; font-weight: 600; text-decoration: none; transition: all 0.2s; border: none; cursor: pointer; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { border: 1px solid var(--border); color: var(--text-main); background: white; }
.btn-outline:hover { background: var(--bg); }

/* Tables */
.table-container { overflow-x: auto; background: white; border-radius: 0.75rem; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; text-align: left; }
th { background: #f9fafb; padding: 0.75rem 1rem; font-size: 0.75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; border-bottom: 1px solid var(--border); }
td { padding: 1rem; border-bottom: 1px solid var(--border); font-size: 0.875rem; }

/* Badges */
.badge { padding: 0.25rem 0.625rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-pending { background: #fef9c3; color: #854d0e; }

/* Store Grid */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.product-card { display: flex; flex-direction: column; height: 100%; transition: transform 0.2s; }
.product-card:hover { transform: translateY(-4px); }

/* Alerts */
.alert { padding: 1rem; border-radius: 0.5rem; margin-bottom: 1.5rem; font-weight: 500; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #dcfce7; color: #166534; }