:root {
    --panel-sidebar: #0f172a;
    --panel-sidebar-hover: #1e293b;
    --panel-accent: #25d366;
    --panel-accent-dark: #128c7e;
    --panel-primary: #2563eb;
    --panel-bg: #f1f5f9;
    --panel-card: #ffffff;
    --panel-border: #e2e8f0;
    --panel-text: #0f172a;
    --panel-muted: #64748b;
    --panel-radius: 12px;
    --panel-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }

body.panel-body {
    margin: 0;
    background: var(--panel-bg);
    color: var(--panel-text);
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    font-size: 0.9375rem;
    line-height: 1.5;
}

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

.panel-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--panel-sidebar);
    color: #e2e8f0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1030;
    overflow-y: auto;
}

.panel-brand {
    padding: 1.25rem 1.25rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-brand a {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--panel-accent);
    box-shadow: 0 0 12px var(--panel-accent);
}

.panel-user-chip {
    margin: 1rem 1.25rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--panel-radius);
    font-size: 0.8rem;
}

.panel-user-chip strong {
    display: block;
    color: #fff;
    font-size: 0.9rem;
    margin-bottom: 0.15rem;
}

.panel-user-chip span {
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.7rem;
}

.panel-nav {
    flex: 1;
    padding: 0.5rem 0.75rem 1rem;
}

.panel-nav-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
    padding: 0.75rem 0.75rem 0.35rem;
    font-weight: 600;
}

.panel-nav a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    color: #cbd5e1;
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.875rem;
    margin-bottom: 2px;
    transition: background 0.15s, color 0.15s;
}

.panel-nav a:hover {
    background: var(--panel-sidebar-hover);
    color: #fff;
}

.panel-nav a.active {
    background: rgba(37, 211, 102, 0.15);
    color: var(--panel-accent);
    font-weight: 600;
}

.panel-sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-main {
    flex: 1;
    margin-left: 260px;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.panel-topbar {
    background: var(--panel-card);
    border-bottom: 1px solid var(--panel-border);
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1020;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

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

.panel-page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
    color: var(--panel-text);
}

.panel-page-header p {
    margin: 0;
    color: var(--panel-muted);
    font-size: 0.9rem;
}

.panel-card {
    background: var(--panel-card);
    border: 1px solid var(--panel-border);
    border-radius: var(--panel-radius);
    box-shadow: var(--panel-shadow);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
}

.panel-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 1rem;
    color: var(--panel-text);
}

.panel-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.panel-stat {
    background: var(--panel-card);
    border: 1px solid var(--panel-border);
    border-radius: var(--panel-radius);
    padding: 1.15rem 1.25rem;
    box-shadow: var(--panel-shadow);
}

.panel-stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--panel-muted);
    margin-bottom: 0.35rem;
}

.panel-stat-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--panel-text);
}

.panel-stat-value.text-success { color: #059669; }

.panel-report-filters label {
    display: block;
}

.panel-report-filters .form-control,
.panel-report-filters .form-select {
    width: 100%;
}

.panel-form label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--panel-text);
    margin: 0 0 0.35rem;
}

.panel-form input,
.panel-form select,
.panel-form textarea {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.panel-form input:focus,
.panel-form select:focus,
.panel-form textarea:focus {
    outline: none;
    border-color: var(--panel-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.panel-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.1s, box-shadow 0.15s;
}

.panel-btn-primary {
    background: linear-gradient(135deg, var(--panel-primary), #1d4ed8);
    color: #fff;
}

.panel-btn-primary:hover { color: #fff; box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35); }

.panel-btn-success {
    background: linear-gradient(135deg, var(--panel-accent), var(--panel-accent-dark));
    color: #fff;
}

.panel-btn-success:hover { color: #fff; }

.panel-btn-danger {
    background: #dc2626;
    color: #fff;
}

.panel-btn-danger:hover { color: #fff; background: #b91c1c; }

.panel-btn-outline {
    background: #fff;
    color: var(--panel-text);
    border: 1px solid var(--panel-border);
}

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

.panel-btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }

.panel-table-wrap { overflow-x: auto; }

.panel-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.panel-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    color: var(--panel-muted);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--panel-border);
}

.panel-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--panel-border);
    vertical-align: middle;
}

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

.panel-badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: capitalize;
}

.panel-badge-success { background: #d1fae5; color: #065f46; }
.panel-badge-warning { background: #fef3c7; color: #92400e; }
.panel-badge-danger { background: #fee2e2; color: #991b1b; }
.panel-badge-secondary { background: #e2e8f0; color: #475569; }

.panel-alert {
    padding: 0.85rem 1.1rem;
    border-radius: var(--panel-radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.panel-alert-success { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.panel-alert-danger { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.panel-alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.panel-alert-info { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }

.panel-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.panel-auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    padding: 1.5rem;
}

.panel-auth-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.panel-auth-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
}

.panel-auth-card .subtitle {
    color: var(--panel-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.panel-wa-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}

.panel-wa-status.connected { background: #d1fae5; color: #065f46; }
.panel-wa-status.disconnected { background: #f1f5f9; color: #64748b; }

.panel-wa-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

.panel-wa-status.connected .panel-wa-status-dot {
    animation: pulse-wa 2s infinite;
}

@keyframes pulse-wa {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.panel-qr-box {
    text-align: center;
    padding: 1.25rem;
    background: #f8fafc;
    border-radius: var(--panel-radius);
    border: 1px dashed var(--panel-border);
}

.panel-qr-box img {
    max-width: 220px;
    border-radius: 8px;
}

@media (max-width: 991px) {
    .panel-sidebar {
        transform: translateX(-100%);
        transition: transform 0.2s;
    }
    .panel-sidebar.open { transform: translateX(0); }
    .panel-main { margin-left: 0; }
    .panel-menu-toggle { display: inline-flex !important; }
}

.panel-menu-toggle { display: none; }