:root {
    --primary: #1e5f8c;
    --primary-dark: #164a6e;
    --accent: #f2a71b;
    --danger: #c0392b;
    --success: #1e8449;
    --bg: #f4f6f8;
    --card-bg: #ffffff;
    --border: #dfe4ea;
    --text: #2c3e50;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.topbar {
    background: var(--primary-dark);
    color: #fff;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
}

.brand {
    font-size: 1.3rem;
    font-weight: bold;
}

.mainnav a {
    color: #fff;
    text-decoration: none;
    margin-left: 16px;
    font-size: 0.92rem;
    opacity: 0.9;
}
.mainnav a:hover { opacity: 1; text-decoration: underline; }

.container {
    max-width: 1150px;
    margin: 24px auto;
    padding: 0 16px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

h1, h2, h3 { color: var(--primary-dark); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-left: 5px solid var(--primary);
    border-radius: 8px;
    padding: 16px;
}
.stat-box .num { font-size: 1.8rem; font-weight: bold; color: var(--primary-dark); }
.stat-box .label { color: #666; font-size: 0.85rem; text-transform: uppercase; }
.stat-box.warning { border-left-color: var(--danger); }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
}
th, td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 0.92rem;
}
th {
    background: var(--primary);
    color: #fff;
}
tr:hover { background: #f9fbfd; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.78rem;
    background: #e8f0fe;
    color: var(--primary-dark);
}
.badge.low { background: #fdecea; color: var(--danger); font-weight: bold; }

.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 5px;
    border: none;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 0.9rem;
}
.btn:hover { background: var(--primary-dark); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 4px 10px; font-size: 0.8rem; }
.btn.secondary { background: #7f8c8d; }

form .form-row {
    margin-bottom: 14px;
}
label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 0.88rem;
}
input[type=text], input[type=number], select, textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 0.95rem;
}
textarea { resize: vertical; min-height: 70px; }

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
@media (max-width: 650px) {
    .grid-2 { grid-template-columns: 1fr; }
    .mainnav a { display: block; margin: 6px 0; }
    .topbar { flex-direction: column; align-items: flex-start; }
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.alert-success { background: #e9f9ef; color: var(--success); border: 1px solid #c3e9d3; }
.alert-error { background: #fdecea; color: var(--danger); border: 1px solid #f5c6c1; }

.footer {
    text-align: center;
    padding: 20px;
    color: #999;
    font-size: 0.8rem;
}

.item-preview {
    background: #f0f6fb;
    border: 1px dashed var(--primary);
    border-radius: 6px;
    padding: 12px;
    font-size: 0.9rem;
    margin-top: 10px;
}

@media print {
    .topbar, .no-print { display: none !important; }
    body { background: #fff; }
    .container { max-width: 100%; }
}