:root {
    --admin-primary: #4f46e5;
    --admin-primary-hover: #4338ca;
    --admin-primary-soft: #eef2ff;
    --admin-sidebar-bg: #0f172a;
    --admin-sidebar-hover: #1e293b;
    --admin-sidebar-active: #312e81;
    --admin-sidebar-text: #94a3b8;
    --admin-sidebar-text-active: #ffffff;
    --admin-topbar-bg: #ffffff;
    --admin-body-bg: #f1f5f9;
    --admin-surface: #ffffff;
    --admin-border: #e2e8f0;
    --admin-text: #0f172a;
    --admin-text-muted: #64748b;
    --admin-success: #059669;
    --admin-success-soft: #ecfdf5;
    --admin-warning: #d97706;
    --admin-warning-soft: #fffbeb;
    --admin-danger: #dc2626;
    --admin-danger-soft: #fef2f2;
    --admin-info: #0284c7;
    --admin-info-soft: #f0f9ff;
    --admin-radius: 0.75rem;
    --admin-radius-sm: 0.5rem;
    --admin-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --admin-shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --admin-sidebar-width: 260px;
    --admin-font: 'Inter', system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: var(--admin-font);
    background: var(--admin-body-bg);
    color: var(--admin-text);
    -webkit-font-smoothing: antialiased;
}

/* ── Shell ─────────────────────────────────────────────── */

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

.admin-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--admin-sidebar-width);
    height: 100vh;
    background: var(--admin-sidebar-bg);
    display: flex;
    flex-direction: column;
    z-index: 1040;
    transition: transform 0.25s ease;
}

.admin-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    text-decoration: none;
    color: #fff;
}

.admin-sidebar-brand:hover {
    color: #fff;
}

.admin-sidebar-brand-icon {
    width: 36px;
    height: 36px;
    background: var(--admin-primary);
    border-radius: var(--admin-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.admin-sidebar-brand-text {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.3;
}

.admin-sidebar-brand-text small {
    display: block;
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--admin-sidebar-text);
    margin-top: 0.1rem;
}

.admin-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    overflow-y: auto;
}

.admin-nav-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #475569;
    padding: 0.5rem 0.75rem 0.35rem;
    margin-top: 0.5rem;
}

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.75rem;
    border-radius: var(--admin-radius-sm);
    color: var(--admin-sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    margin-bottom: 0.15rem;
}

.admin-nav-link i {
    font-size: 1.05rem;
    width: 1.25rem;
    text-align: center;
    opacity: 0.85;
}

.admin-nav-link:hover {
    background: var(--admin-sidebar-hover);
    color: #e2e8f0;
}

.admin-nav-link.active {
    background: var(--admin-sidebar-active);
    color: var(--admin-sidebar-text-active);
}

.admin-nav-link.active i {
    opacity: 1;
}

.admin-main {
    flex: 1;
    margin-left: var(--admin-sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-topbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: var(--admin-topbar-bg);
    border-bottom: 1px solid var(--admin-border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.admin-topbar-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-sidebar-toggle {
    display: none;
    background: none;
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius-sm);
    padding: 0.35rem 0.5rem;
    color: var(--admin-text);
    cursor: pointer;
    line-height: 1;
}

.admin-topbar-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.admin-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--admin-primary-soft);
    color: var(--admin-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.admin-user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--admin-text);
}

.admin-content {
    flex: 1;
    padding: 1.5rem;
    max-width: 1400px;
    width: 100%;
}

.admin-sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    z-index: 1035;
}

/* ── Page header ───────────────────────────────────────── */

.page-header {
    margin-bottom: 1.5rem;
}

.page-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--admin-text);
    margin: 0;
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--admin-text-muted);
    margin: 0.25rem 0 0;
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ── Cards ─────────────────────────────────────────────── */

.admin-card {
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    box-shadow: var(--admin-shadow);
}

.admin-card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.admin-card-header h5,
.admin-card-header h6 {
    margin: 0;
    font-weight: 600;
    font-size: 0.95rem;
}

.admin-card-body {
    padding: 1.25rem;
}

/* ── Stat cards ────────────────────────────────────────── */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    padding: 1.15rem 1.25rem;
    box-shadow: var(--admin-shadow);
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    transition: box-shadow 0.2s;
}

.stat-card:hover {
    box-shadow: var(--admin-shadow-lg);
}

.stat-card-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--admin-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.stat-card-icon.primary { background: var(--admin-primary-soft); color: var(--admin-primary); }
.stat-card-icon.success { background: var(--admin-success-soft); color: var(--admin-success); }
.stat-card-icon.warning { background: var(--admin-warning-soft); color: var(--admin-warning); }
.stat-card-icon.danger  { background: var(--admin-danger-soft);  color: var(--admin-danger); }
.stat-card-icon.info    { background: var(--admin-info-soft);    color: var(--admin-info); }

.stat-card-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--admin-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.15rem;
}

.stat-card-value {
    font-size: 1.65rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.stat-card-value.success { color: var(--admin-success); }
.stat-card-value.warning { color: var(--admin-warning); }
.stat-card-value.danger  { color: var(--admin-danger); }
.stat-card-value.primary { color: var(--admin-primary); }

/* ── Tables ────────────────────────────────────────────── */

.admin-table-card {
    overflow: hidden;
}

.admin-table-card .table {
    margin-bottom: 0;
    font-size: 0.875rem;
}

.admin-table-card .table thead th {
    background: #f8fafc;
    border-bottom: 1px solid var(--admin-border);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--admin-text-muted);
    padding: 0.75rem 1.25rem;
    white-space: nowrap;
}

.admin-table-card .table tbody td {
    padding: 0.85rem 1.25rem;
    vertical-align: middle;
    border-bottom: 1px solid #f1f5f9;
    color: var(--admin-text);
}

.admin-table-card .table tbody tr:last-child td {
    border-bottom: none;
}

.admin-table-card .table tbody tr:hover {
    background: #f8fafc;
}

.table-empty {
    text-align: center;
    padding: 3rem 1.5rem !important;
    color: var(--admin-text-muted);
}

.table-empty i {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
    opacity: 0.4;
}

/* ── Badges ────────────────────────────────────────────── */

.badge-status {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.3em 0.65em;
    border-radius: 999px;
    letter-spacing: 0.02em;
}

.badge-status.active    { background: var(--admin-success-soft); color: var(--admin-success); }
.badge-status.suspended { background: var(--admin-warning-soft); color: var(--admin-warning); }
.badge-status.inactive  { background: #f1f5f9; color: #64748b; }
.badge-status.info      { background: var(--admin-info-soft); color: var(--admin-info); }
.badge-status.danger    { background: var(--admin-danger-soft); color: var(--admin-danger); }
.badge-status.neutral   { background: #f1f5f9; color: #475569; }

/* ── Buttons ───────────────────────────────────────────── */

.btn-admin-primary {
    background: var(--admin-primary);
    border-color: var(--admin-primary);
    color: #fff;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--admin-radius-sm);
    padding: 0.45rem 1rem;
}

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

.btn-admin-outline {
    background: transparent;
    border: 1px solid var(--admin-border);
    color: var(--admin-text);
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--admin-radius-sm);
    padding: 0.45rem 1rem;
}

.btn-admin-outline:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
    color: var(--admin-text);
}

.btn-admin-success {
    background: var(--admin-success);
    border-color: var(--admin-success);
    color: #fff;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--admin-radius-sm);
}

.btn-admin-success:hover {
    background: #047857;
    border-color: #047857;
    color: #fff;
}

.btn-admin-danger-outline {
    background: transparent;
    border: 1px solid #fecaca;
    color: var(--admin-danger);
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--admin-radius-sm);
}

.btn-admin-danger-outline:hover {
    background: var(--admin-danger-soft);
    border-color: #fca5a5;
    color: var(--admin-danger);
}

.btn-admin-warning-outline {
    background: transparent;
    border: 1px solid #fde68a;
    color: var(--admin-warning);
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--admin-radius-sm);
}

.btn-admin-warning-outline:hover {
    background: var(--admin-warning-soft);
    color: var(--admin-warning);
}

.btn-sm {
    font-size: 0.8rem;
    padding: 0.3rem 0.65rem;
    border-radius: 0.375rem;
}

.btn-action-group {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

/* ── Forms ─────────────────────────────────────────────── */

.form-section {
    margin-bottom: 1.75rem;
}

.form-section-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--admin-text-muted);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: #334155;
    margin-bottom: 0.35rem;
}

.form-control,
.form-select {
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius-sm);
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--admin-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 1rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--admin-border);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--admin-text-muted);
    margin-top: 0.25rem;
}

/* ── Detail view ───────────────────────────────────────── */

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.detail-list li {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.875rem;
}

.detail-list li:last-child {
    border-bottom: none;
}

.detail-list .detail-label {
    color: var(--admin-text-muted);
    font-weight: 500;
    flex-shrink: 0;
    min-width: 140px;
}

.detail-list .detail-value {
    text-align: right;
    font-weight: 500;
    word-break: break-word;
}

.detail-list .detail-value code {
    font-size: 0.8rem;
    background: #f1f5f9;
    padding: 0.15rem 0.4rem;
    border-radius: 0.25rem;
    color: var(--admin-primary);
}

/* ── Alerts ────────────────────────────────────────────── */

.admin-alert {
    border: none;
    border-radius: var(--admin-radius-sm);
    font-size: 0.875rem;
    padding: 0.85rem 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
}

.admin-alert i {
    font-size: 1rem;
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.admin-alert.alert-success { background: var(--admin-success-soft); color: #065f46; }
.admin-alert.alert-danger  { background: var(--admin-danger-soft);  color: #991b1b; }
.admin-alert.alert-warning { background: var(--admin-warning-soft); color: #92400e; }
.admin-alert.alert-info    { background: var(--admin-info-soft);    color: #075985; }

/* ── Info banner ───────────────────────────────────────── */

.info-banner {
    background: var(--admin-info-soft);
    border: 1px solid #bae6fd;
    border-radius: var(--admin-radius-sm);
    padding: 0.85rem 1.15rem;
    font-size: 0.875rem;
    color: #0c4a6e;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.info-banner strong {
    font-weight: 600;
}

.info-banner .divider {
    color: #7dd3fc;
}

/* ── Quick actions ─────────────────────────────────────── */

.quick-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ── Login page ────────────────────────────────────────── */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, #f8fafc 0%, #eef2ff 45%, #e0e7ff 100%);
    padding: 1.5rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: 1rem;
    box-shadow: 0 20px 40px -12px rgba(79, 70, 229, 0.12), 0 8px 16px -8px rgba(15, 23, 42, 0.06);
    overflow: hidden;
}

.login-card-header {
    background: var(--admin-sidebar-bg);
    padding: 2rem 2rem 1.5rem;
    text-align: center;
    color: #fff;
}

.login-card-header .login-logo {
    width: 52px;
    height: 52px;
    background: var(--admin-primary);
    border-radius: var(--admin-radius);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 0.85rem;
}

.login-card-header h4 {
    font-weight: 700;
    font-size: 1.15rem;
    margin: 0;
}

.login-card-header p {
    font-size: 0.8rem;
    color: var(--admin-sidebar-text);
    margin: 0.35rem 0 0;
}

.login-card-body {
    padding: 2rem;
}

.login-hint {
    font-size: 0.75rem;
    color: var(--admin-text-muted);
    text-align: center;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--admin-border);
}

/* ── License key ───────────────────────────────────────── */

.license-key {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.8rem;
    background: #f1f5f9;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    color: var(--admin-primary);
    letter-spacing: 0.02em;
}

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 991.98px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }

    .admin-sidebar.open {
        transform: translateX(0);
    }

    .admin-sidebar-overlay.show {
        display: block;
    }

    .admin-main {
        margin-left: 0;
    }

    .admin-sidebar-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .admin-content {
        padding: 1rem;
    }

    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 575.98px) {
    .stat-grid {
        grid-template-columns: 1fr;
    }

    .page-header-row {
        flex-direction: column;
    }

    .admin-topbar-user .admin-user-name {
        display: none;
    }
}