*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #8b5cf6;
    --accent: #10b981;
    --accent-light: rgba(16, 185, 129, 0.1);

    --bg-primary: #0f0f10;
    --bg-secondary: #18181b;
    --bg-tertiary: #1f1f23;
    --bg-hover: #27272a;

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --border: #27272a;
    --border-light: #3f3f46;

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: 0.15s ease;

    --sidebar-width: 280px;
    --topbar-height: 56px;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    overflow: hidden;
}

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

a:hover {
    text-decoration: underline;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

.hidden {
    display: none !important;
}

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-weight: 500;
    width: 100%;
    transition: background var(--transition);
    border: none;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: var(--radius);
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.btn-danger {
    background: var(--danger);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-weight: 500;
    transition: opacity var(--transition);
}

.btn-danger:hover {
    opacity: 0.85;
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.badge-admin { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.badge-tenant-admin { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }
.badge-user { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.badge-active { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.badge-inactive { background: rgba(239, 68, 68, 0.15); color: #f87171; }

.error-message {
    color: var(--danger);
    font-size: 13px;
    margin-top: 8px;
    min-height: 20px;
}

.success-message {
    color: var(--success);
    font-size: 13px;
    margin-top: 8px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 24px;
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h2 {
    font-size: 18px;
    margin-bottom: 16px;
}

.modal .form-group {
    margin-bottom: 16px;
}

.modal .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.modal .form-group input,
.modal .form-group select,
.modal .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
}

.modal .form-group input:focus,
.modal .form-group select:focus,
.modal .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 20px;
}

.modal-actions button {
    padding: 8px 20px;
    border-radius: var(--radius);
    font-weight: 500;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Tenant branding logo */
.tenant-logo {
    height: 32px;
    width: auto;
    margin-right: 8px;
}