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

        :root {
            --primary: #4c9aff;
            --primary-dark: #2e7ee6;
            --secondary: #f0f8ff;
            --accent: #00d4ff;
            --success: #00d4aa;
            --danger: #ff4757;
            --warning: #ffa502;
            --dark: #0a0a0a;
            --dark-light: #1a1a1a;
            --dark-medium: #2a2a2a;
            --gray: #666666;
            --gray-light: #888888;
            --gray-dark: #333333;
            --white: #ffffff;
            --text-light: #cccccc;
            --border: rgba(255, 255, 255, 0.1);
            --glow: 0 0 20px rgba(76, 154, 255, 0.3);
        }

        body {
            font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--dark);
            color: var(--text-light);
            min-height: 100vh;
            overflow-x: hidden;
            font-weight: 400;
        }

        .dashboard-container {
            display: grid;
            grid-template-columns: 350px 1fr;
            min-height: 100vh;
            max-width: 100%;
            margin: 0;
            padding: 0;
        }

        /* Sidebar */
        .sidebar {
            background: var(--dark-light);
            border-right: 1px solid var(--border);
            padding: 2rem 2rem;
            position: fixed;
            height: 100vh;
            width: 350px;
            z-index: 100;
            overflow-y: auto;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(16px);
        }

        .sidebar-header {
            text-align: center;
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border);
        }

        .sidebar-header h2 {
            color: var(--primary);
            font-size: 1.8rem;
            margin-bottom: 0.8rem;
            font-weight: bold;
        }

        .sidebar-subtitle {
            color: var(--gray-light);
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .sidebar-nav {
            list-style: none;
        }

        .sidebar-nav li {
            margin-bottom: 0.5rem;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 1.2rem 1.5rem;
            color: var(--gray-light);
            text-decoration: none;
            border-radius: 15px;
            transition: all 0.3s ease;
            position: relative;
            font-size: 1.1rem;
        }

        .sidebar-nav a:hover,
        .sidebar-nav a.active {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            transform: translateX(5px);
        }

        .sidebar-nav a i {
            margin-right: 1rem;
            width: 20px;
            text-align: center;
        }

        /* Main Content */
        .main-content {
            margin-left: 350px;
            padding: 2rem 4rem;
            background: var(--dark);
            min-height: 100vh;
            width: calc(100vw - 350px);
        }

        .page-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border);
        }

        .page-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 0.5rem;
        }

        .page-subtitle {
            color: var(--gray-light);
            font-size: 1.1rem;
        }

        /* Profile Section */
        .profile-section {
            background: linear-gradient(145deg, var(--dark-light), var(--dark-medium));
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 2rem;
            margin-bottom: 2rem;
        }

        .section-header {
            display: flex;
            align-items: center;
            margin-bottom: 2rem;
        }

        .section-header h3 {
            color: var(--white);
            font-size: 1.5rem;
            font-weight: 600;
            margin-left: 1rem;
        }

        .section-header i {
            color: var(--primary);
            font-size: 1.5rem;
        }

        /* Form Styles */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            color: var(--text-light);
            font-weight: 500;
            margin-bottom: 0.5rem;
            font-size: 1rem;
        }

        .form-input {
            width: 100%;
            padding: 1rem 1.5rem;
            background: var(--dark-medium);
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--white);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: var(--glow);
        }

        .form-input::placeholder {
            color: var(--gray-light);
        }

        /* Button Styles */
        .btn {
            padding: 1rem 2rem;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--glow);
        }

        .btn-danger {
            background: linear-gradient(135deg, var(--danger), #ff6b7a);
            color: white;
        }

        .btn-danger:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(255, 71, 87, 0.3);
        }

        /* User Info */
        .user-info {
            display: flex;
            align-items: center;
            margin-bottom: 2rem;
            padding: 1.5rem;
            background: var(--dark-medium);
            border-radius: 15px;
            border: 1px solid var(--border);
        }

        .user-avatar {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            font-weight: bold;
            color: white;
            margin-right: 1.5rem;
        }

        .user-details h3 {
            color: var(--white);
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .user-details small {
            color: var(--gray-light);
            font-size: 1rem;
        }

        /* Mobile Menu Toggle */
        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 20px;
            left: 20px;
            z-index: 1002;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            border: none;
            border-radius: 10px;
            padding: 10px;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(76, 154, 255, 0.3);
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--dark-light);
        }

        ::-webkit-scrollbar-thumb {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--accent));
        }

        /* Responsive */
        @media (max-width: 1200px) {
            .dashboard-container {
                grid-template-columns: 300px 1fr;
            }
            
            .sidebar {
                width: 300px;
            }
            
            .main-content {
                margin-left: 300px;
                padding: 2rem;
                width: calc(100vw - 300px);
            }
        }

        @media (max-width: 768px) {
            .dashboard-container {
                grid-template-columns: 1fr;
            }
            
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                width: 280px;
                position: fixed;
                z-index: 1001;
            }
            
            .sidebar.active {
                transform: translateX(0);
            }
            
            .main-content {
                margin-left: 0;
                padding: 1rem;
                padding-top: 80px;
                width: 100vw;
            }
            
            .mobile-menu-toggle {
                display: block;
            }
            
            .page-header {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
        }