:root {
    --primary: #1b6e3c;
    --primary-dark: #145030;
    --bg: #f4f6f5;
    --border: #d9dee0;
    --warning: #fff3cd;
    --text: #1f2a24;
}
* { box-sizing: border-box; }
body { font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif; background: var(--bg); color: var(--text); margin: 0; }
.container { max-width: 1100px; margin: 20px auto; padding: 0 16px; }

.navbar { display: flex; justify-content: space-between; align-items: center; background: var(--primary); color: #fff; padding: 10px 20px; flex-wrap: wrap; }
.navbar a { color: #fff; text-decoration: none; margin-right: 14px; }
.navbar a:hover { text-decoration: underline; }
.nav-brand a { font-weight: 700; font-size: 18px; }

.cards { display: flex; gap: 16px; margin: 20px 0; flex-wrap: wrap; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; min-width: 200px; }
.card h3 { margin: 0 0 8px; font-size: 14px; color: #555; }
.card .big { font-size: 26px; font-weight: 700; margin: 0; color: var(--primary-dark); }

.quick-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.btn { background: var(--primary); color: #fff; border: none; padding: 10px 16px; border-radius: 6px; text-decoration: none; display: inline-block; cursor: pointer; font-size: 14px; }
.btn:hover { background: var(--primary-dark); }
.btn-primary { background: var(--primary-dark); }
.btn-small { padding: 4px 10px; font-size: 12px; border-radius: 4px; border: 1px solid var(--border); background: #fff; cursor: pointer; }

.table { width: 100%; border-collapse: collapse; background: #fff; margin-top: 12px; }
.table th, .table td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; font-size: 14px; }
.table th { background: #eef2ef; }
.row-warning { background: var(--warning); }

.form-box { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin: 16px 0; max-width: 480px; }
.form-box label { display: block; margin-top: 10px; font-size: 13px; font-weight: 600; }
.form-box input, .form-box select { width: 100%; padding: 8px; margin-top: 4px; border: 1px solid var(--border); border-radius: 4px; }

.inline-form { display: flex; align-items: center; gap: 8px; margin: 10px 0; }

.alert { padding: 10px 14px; border-radius: 6px; margin: 10px 0; background: #e7f5ec; border: 1px solid var(--primary); }
.alert-error { background: #fdecea; border-color: #d9534f; color: #a33; }

.pos-layout { display: flex; gap: 20px; margin-top: 16px; flex-wrap: wrap; }
.pos-left { flex: 2; min-width: 320px; }
.pos-right { flex: 1; min-width: 280px; }
.scan-box, .summary-box, .customer-box, .payment-box { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 14px; margin-bottom: 14px; }
.scan-box input { width: 100%; padding: 10px; font-size: 16px; border: 1px solid var(--border); border-radius: 4px; margin-top: 6px; }
.search-results { display: none; position: absolute; left: 14px; right: 14px; background: #fff; border: 1px solid var(--border); border-radius: 0 0 6px 6px; max-height: 260px; overflow-y: auto; z-index: 20; box-shadow: 0 4px 10px rgba(0,0,0,0.08); }
.search-item { display: flex; justify-content: space-between; gap: 10px; padding: 8px 12px; cursor: pointer; border-bottom: 1px solid var(--border); }
.search-item:last-child { border-bottom: none; }
.search-item:hover { background: #f0f4f1; }
.summary-box .row { display: flex; justify-content: space-between; padding: 6px 0; }
.summary-box .total-row { font-weight: 700; font-size: 18px; border-top: 1px solid var(--border); margin-top: 6px; }
.payment-row { display: flex; gap: 8px; margin-bottom: 8px; }
.payment-row select, .payment-row input { padding: 6px; }

.login-page { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-box { background: #fff; padding: 30px; border-radius: 10px; width: 320px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.login-box h1 { margin: 0; color: var(--primary-dark); }
.login-box .subtitle { color: #666; margin-top: 4px; }
.login-box label { display: block; margin-top: 14px; font-size: 13px; font-weight: 600; }
.login-box input { width: 100%; padding: 10px; margin-top: 4px; border: 1px solid var(--border); border-radius: 4px; }
.login-box button { width: 100%; margin-top: 18px; padding: 10px; background: var(--primary); color: #fff; border: none; border-radius: 6px; cursor: pointer; }

.muted { color: #666; }
.small { font-size: 12px; }