* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    color: #1f2937;
}

a {
    color: inherit;
    text-decoration: none;
}

.admin-app {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 240px 1fr;
}

.sidebar {
    background: #111827;
    color: #f9fafb;
    padding: 1rem;
}

.brand {
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.admin-meta {
    font-size: 0.875rem;
    color: #cbd5e1;
    margin-bottom: 1rem;
}

.nav {
    display: grid;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    color: #e5e7eb;
}

.nav-link:hover,
.nav-link.active {
    background: #1f2937;
    color: #fff;
}

.logout-form {
    margin-top: 1rem;
}

.content {
    padding: 1rem 1.5rem 2rem;
}

.content-header h1 {
    margin: 0 0 1rem;
    font-size: 1.4rem;
}

.card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.card.narrow {
    max-width: 520px;
}

.muted {
    color: #6b7280;
    margin-top: 0;
}

.form-grid {
    display: grid;
    gap: 0.5rem;
}

.form-inline {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.form-inline.wrap {
    flex-wrap: wrap;
}

input,
select,
button {
    font: inherit;
}

input,
select {
    border: 1px solid #d1d5db;
    border-radius: 6px;
    padding: 0.5rem 0.6rem;
    background: #fff;
}

.btn {
    border: none;
    border-radius: 6px;
    background: #1d4ed8;
    color: #fff;
    padding: 0.45rem 0.75rem;
    cursor: pointer;
}

.btn:hover {
    opacity: 0.92;
}

.btn-secondary {
    background: #4b5563;
}

.btn-danger {
    background: #dc2626;
}

.full {
    width: 100%;
}

.flash {
    padding: 0.7rem 0.8rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

.flash-success {
    background: #ecfdf5;
    color: #166534;
    border-color: #bbf7d0;
}

.flash-error {
    background: #fef2f2;
    color: #991b1b;
    border-color: #fecaca;
}

.flash-info {
    background: #eff6ff;
    color: #1d4ed8;
    border-color: #bfdbfe;
}

.table-wrap {
    overflow: auto;
}

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

th,
td {
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
    padding: 0.55rem;
    vertical-align: top;
    font-size: 0.92rem;
}

th {
    background: #f9fafb;
    position: sticky;
    top: 0;
}

.nested table th {
    position: static;
}

.actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.ua-cell {
    max-width: 320px;
    white-space: normal;
    word-break: break-word;
}

pre {
    margin: 0.4rem 0 0;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: 6px;
    padding: 0.6rem;
    max-height: 240px;
    overflow: auto;
    font-size: 0.8rem;
}

.kpis {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.kpi {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 0.8rem;
}

.kpi-label {
    font-size: 0.8rem;
    color: #6b7280;
}

.kpi-value {
    font-size: 1.3rem;
    font-weight: 700;
}

.kpi-value.ok {
    color: #15803d;
}

.kpi-value.danger {
    color: #b91c1c;
}

.pager {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.diff-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(260px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
}

@media (max-width: 980px) {
    .admin-app {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: sticky;
        top: 0;
        z-index: 20;
    }
}