:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --success: #10b981;
    --dark: #1e293b;
    --dark-light: #334155;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --sidebar-width: 280px;
    --toolbar-height: 70px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-light) 100%);
    color: white;
    z-index: 1000;
    transition: var(--transition);
    overflow-y: auto;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-logo {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.sidebar-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}

.sidebar-title {
    flex: 1;
}

.sidebar-title h1 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.sidebar-title p {
    font-size: 0.75rem;
    opacity: 0.7;
}

.sidebar-nav {
    padding: 1.5rem 0;
}

.nav-section {
    margin-bottom: 2rem;
}

.nav-section-title {
    padding: 0 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.5;
    margin-bottom: 0.75rem;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    gap: 1rem;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
    transform: scaleY(0);
    transition: var(--transition);
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.nav-item:hover::before,
.nav-item.active::before {
    transform: scaleY(1);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: white;
}

.nav-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.nav-text {
    flex: 1;
    font-weight: 500;
}

.nav-badge {
    background: var(--danger);
    color: white;
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-weight: 600;
}

/* Toolbar Styles */
.toolbar {
    position: fixed;
    left: var(--sidebar-width);
    top: 0;
    right: 0;
    height: var(--toolbar-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    z-index: 999;
    transition: var(--transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.toolbar-left {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.toolbar-search {
    position: relative;
    max-width: 400px;
    width: 100%;
}

.toolbar-search input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--gray-300);
    border-radius: 12px;
    font-size: 0.875rem;
    transition: var(--transition);
    background: var(--gray-50);
}

.toolbar-search input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.toolbar-search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.client-switcher {
    position: relative;
}

.client-switcher-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--gray-50);
    border: 1px solid var(--gray-300);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--gray-700);
}

.client-switcher-btn:hover {
    background: white;
    border-color: var(--primary);
}

.client-logo-small {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: white;
}

.client-logo-small img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.toolbar-icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: none;
    background: var(--gray-50);
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.toolbar-icon-btn:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.toolbar-icon-btn .badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid white;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--toolbar-height);
    padding: 2rem;
    min-height: calc(100vh - var(--toolbar-height));
    transition: var(--transition);
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--gray-600);
    font-size: 1rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
}

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

.breadcrumb a:hover {
    color: var(--primary-dark);
}

.breadcrumb-separator {
    color: var(--gray-400);
}

/* Cards */
.card {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.card:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    color: var(--gray-700);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), var(--secondary-dark));
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Grid System */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.primary {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(99, 102, 241, 0.2));
    color: var(--primary);
}

.stat-icon.success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.2));
    color: var(--success);
}

.stat-icon.warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.2));
    color: var(--warning);
}

.stat-icon.danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.2));
    color: var(--danger);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.stat-change {
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--danger);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--gray-200);
    min-width: 200px;
    z-index: 1000;
    display: none;
    overflow: hidden;
}

.dropdown.active .dropdown-menu {
    display: block;
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-100);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--gray-50);
    color: var(--primary);
}

/* Responsive */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 0;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .toolbar {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    
    .toolbar {
        padding: 0 1rem;
    }
    
    .toolbar-search {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}