:root {
    --primary: #1677ff;
    --primary-dark: #0d5edc;
    --danger: #e5484d;
    --bg: #f5f7fb;
    --panel: #ffffff;
    --border: #e3e8f0;
    --text: #1f2937;
    --muted: #6b7280;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
}

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

code {
    background: #f1f3f7;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 12px;
    word-break: break-all;
}

.topbar {
    height: 56px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand { font-size: 16px; font-weight: 600; }

.who { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }

.badge {
    background: #e8f0ff;
    color: var(--primary);
    border-radius: 10px;
    padding: 1px 8px;
    font-size: 12px;
}

.logout { color: var(--muted); }

.layout { display: flex; min-height: calc(100vh - 96px); }

.sidenav {
    width: 190px;
    background: #fff;
    border-right: 1px solid var(--border);
    padding: 14px 0;
    flex-shrink: 0;
}

.navitem {
    display: block;
    padding: 10px 20px;
    color: var(--text);
    border-left: 3px solid transparent;
}

.navitem:hover { background: #f7f9fc; text-decoration: none; }

.navitem.active {
    background: #eef4ff;
    border-left-color: var(--primary);
    color: var(--primary);
    font-weight: 600;
}

.content { flex: 1; padding: 22px 26px 60px; max-width: 1200px; }

h2 { font-size: 20px; margin: 0 0 18px; }

h3 { font-size: 15px; margin: 0 0 14px; }

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    margin-bottom: 18px;
}

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 18px; }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 18px;
}

.card-label { color: var(--muted); font-size: 13px; }

.card-value { font-size: 26px; font-weight: 600; margin-top: 4px; }

.table { width: 100%; border-collapse: collapse; }

.table th, .table td {
    text-align: left;
    padding: 9px 10px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.table th { color: var(--muted); font-weight: 500; font-size: 13px; background: #fafbfd; }

.table tbody tr:hover { background: #fafbfd; }

.sub-row td { background: #fcfdff; padding: 8px 10px; }

.avatar { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; vertical-align: middle; }

.row-inline { display: flex; align-items: center; gap: 8px; }

.ok { color: #12a150; }
.warn { color: #d97706; }

.empty { color: var(--muted); padding: 14px 0; }

.hint { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

.btn {
    display: inline-block;
    padding: 6px 14px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    line-height: 1.5;
}

.btn:hover { border-color: #c7d2e3; text-decoration: none; }

.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }

.btn-danger { color: var(--danger); border-color: #f3c6c8; }
.btn-danger:hover { background: #fdf2f2; }

.btn-small { padding: 3px 9px; font-size: 12px; }

.inline { display: inline; }
.inline-form { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 0; }
.inline-form label { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }

.form-grid label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--muted); }

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

.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.12);
}

.form-grid input[readonly] { background: #f5f7fb; color: var(--muted); }

.col-span { grid-column: 1 / -1; }

.form-actions { grid-column: 1 / -1; }

.flash {
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 13px;
}

.flash-ok { background: #eaf7ef; color: #12663a; border: 1px solid #c7e9d5; }
.flash-error { background: #fdf2f2; color: #a11b1f; border: 1px solid #f3c6c8; }

.qr-card {
    display: flex;
    gap: 18px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.qr-image { width: 140px; flex-shrink: 0; text-align: center; }
.qr-image img { width: 140px; height: 140px; border: 1px solid var(--border); border-radius: 6px; }

.qr-info { flex: 1; min-width: 240px; }

.qr-title { font-weight: 600; margin-bottom: 6px; }

.qr-meta { color: var(--muted); font-size: 13px; }

.qr-actions { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }

.qr-edit { display: none; width: 100%; margin-top: 12px; padding-top: 14px; border-top: 1px dashed var(--border); }

.pager { margin-top: 14px; display: flex; align-items: center; gap: 10px; }

.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 16px; }

.small { font-size: 12px; }

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #eef4ff 0%, #f7f9fc 100%);
}

.login-box {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 30px 28px;
    width: 360px;
    box-shadow: 0 8px 30px rgba(20, 40, 80, 0.06);
}

.login-box h1 { font-size: 19px; margin: 0 0 20px; }

.login-box label { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; font-size: 13px; color: var(--muted); }

.login-box input {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 9px 11px;
    font-size: 14px;
    font-family: inherit;
}

.login-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.12);
}

.login-box .btn { width: 100%; padding: 10px; margin-top: 6px; }

@media (max-width: 760px) {
    .layout { flex-direction: column; }
    .sidenav { width: 100%; display: flex; overflow-x: auto; padding: 6px 0; }
    .navitem { border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; }
    .navitem.active { border-left: none; border-bottom-color: var(--primary); }
    .content { padding: 16px; }
    .qr-image { width: 100%; }
    .qr-image img { width: 120px; height: 120px; }
}