:root {
    --bg: #f4f5f7;
    --surface: #ffffff;
    --border: #e2e4e9;
    --text: #1f2430;
    --text-muted: #6b7280;
    --primary: #2b5fd9;
    --primary-dark: #1e46ab;
    --danger: #d63b3b;
    --success: #1f9d55;
    --warning: #b8860b;
    --radius: 8px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 230px;
    flex-shrink: 0;
    background: #171a21;
    color: #cfd3dc;
    padding: 20px 0;
}

.sidebar .brand {
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    padding: 0 20px 20px;
    display: block;
    border-bottom: 1px solid #2a2e38;
    margin-bottom: 12px;
}

.sidebar nav a {
    display: block;
    padding: 10px 20px;
    color: #cfd3dc;
}

.sidebar nav a:hover, .sidebar nav a.active {
    background: #262b36;
    color: #fff;
    text-decoration: none;
}

.sidebar .user-box {
    padding: 14px 20px;
    border-top: 1px solid #2a2e38;
    margin-top: 12px;
    font-size: 13px;
}

.main { flex: 1; min-width: 0; }

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 14px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content { padding: 24px; }

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 20px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
}

.stat-card .value { font-size: 26px; font-weight: 700; }
.stat-card .label { color: var(--text-muted); font-size: 13px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #fafbfc; }

.thumb { width: 44px; height: 44px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); background: #f0f1f3; }
.thumb-lg { width: 120px; height: 120px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--border); background: #f0f1f3; }

.badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    background: #eef0f4;
    color: var(--text-muted);
}
.badge.green { background: #e6f6ec; color: var(--success); }
.badge.red { background: #fbe9e9; color: var(--danger); }
.badge.yellow { background: #fbf2df; color: var(--warning); }
.badge.blue { background: #e8eefc; color: var(--primary); }

.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
}
.btn:hover { background: #f1f2f5; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

form.inline { display: inline; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 13px; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 180px; }

input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: #fff;
    color: var(--text);
}

.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.wh-grid { display: flex; gap: 10px; flex-wrap: wrap; }
.wh-card {
    width: 108px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px;
    background: #fafbfc;
}
.wh-card .wh-label { font-size: 12px; font-weight: 600; margin-bottom: 6px; display: block; }
.wh-card .wh-qty {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
    font-weight: 600;
}
.wh-card .wh-pos-wrap { margin-top: 6px; padding-top: 6px; border-top: 1px dashed var(--border); }
.wh-card .wh-pos-label { font-size: 10px; text-transform: uppercase; letter-spacing: .03em; color: var(--text-muted); display: block; margin-bottom: 3px; }
.wh-card .wh-pos {
    width: 100%;
    padding: 5px 6px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}
.wh-card .wh-pos:focus, .wh-card .wh-qty:focus { color: var(--text); outline: 1px solid var(--primary); }
.wh-card.wh-readonly { background: #eef0f4; }
.wh-card.wh-readonly .wh-qty { background: #eef0f4; color: var(--text-muted); }

.cat-tree {
    max-height: 260px;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 12px;
    background: #fff;
}
.cat-row { padding: 3px 0; }
.cat-row .checkbox-row { gap: 6px; }
.cat-row .checkbox-row span { font-size: 14px; }

.filters { display: flex; gap: 10px; margin-bottom: 16px; align-items: center; flex-wrap: wrap; }

.alert {
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-success { background: #e6f6ec; color: var(--success); border: 1px solid #bfe7cd; }
.alert-error { background: #fbe9e9; color: var(--danger); border: 1px solid #f2c2c2; }

.errors { margin: 0 0 16px; padding: 10px 14px; background: #fbe9e9; color: var(--danger); border: 1px solid #f2c2c2; border-radius: 6px; }
.errors ul { margin: 0; padding-left: 18px; }

.pagination { margin-top: 16px; }
.pagination nav { display: flex; gap: 4px; flex-wrap: wrap; }

.permission-group { margin-bottom: 14px; }
.permission-group h3 { font-size: 13px; text-transform: uppercase; color: var(--text-muted); margin: 0 0 8px; }

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}
.login-box {
    width: 100%;
    max-width: 360px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}
.login-box h1 { text-align: center; margin-bottom: 24px; }

.text-muted { color: var(--text-muted); }
.mb-0 { margin-bottom: 0; }
.section-title { display: flex; justify-content: space-between; align-items: center; }