:root {
            --primary: rgba(255, 130, 13, 1);
            --secondary: #003366;
            --accent: #228B22;
            --light: #FFFFFF;
            --dark: #1A1A1A;
            --text: #333333;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--dark) 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px;
        }

        .login-container {
            display: flex;
            max-width: 1000px;
            width: 100%;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            border-radius: 20px;
            overflow: hidden;
            background: white;
            animation: slideUp 0.8s ease-out;
        }

        .login-left {
            flex: 1;
            padding: 60px 40px;
            background: white;
            position: relative;
        }

        .login-right {
            flex: 1;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            padding: 60px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .login-right::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="rgba(255,255,255,0.1)"><circle cx="50" cy="50" r="2"/></svg>');
            background-size: 50px 50px;
        }

        .logo {
            text-align: center;
            margin-bottom: 40px;
        }

        .logo h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--dark);
        }

        .logo span {
            color: var(--primary);
        }

        .logo p {
            color: #666;
            font-size: 1rem;
            margin-top: 5px;
        }

        .login-form h2 {
            color: var(--dark);
            margin-bottom: 30px;
            font-size: 2rem;
            font-weight: 600;
        }

        .form-group {
            margin-bottom: 25px;
            position: relative;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--dark);
            font-weight: 600;
            font-size: 0.9rem;
        }

        .input-with-icon {
            position: relative;
        }

        .input-with-icon i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #666;
            z-index: 2;
        }

        .input-with-icon input {
            width: 100%;
            padding: 15px 15px 15px 45px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: #f8f9fa;
        }

        .input-with-icon input:focus {
            outline: none;
            border-color: var(--primary);
            background: white;
            box-shadow: 0 0 0 3px rgba(255, 130, 13, 0.1);
        }

        .remember-forgot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .remember-me input {
            width: auto;
        }

        .forgot-password {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .forgot-password:hover {
            color: var(--secondary);
        }

        .login-btn {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .login-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(255, 130, 13, 0.3);
        }

        .login-btn:active {
            transform: translateY(0);
        }

        .divider {
            margin: 30px 0;
            text-align: center;
            position: relative;
            color: #666;
        }

        .divider::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background: #e0e0e0;
        }

        .divider span {
            background: white;
            padding: 0 15px;
            position: relative;
            z-index: 1;
        }

        .social-login {
            display: flex;
            gap: 15px;
            justify-content: center;
        }

        .social-btn {
            flex: 1;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            background: white;
            color: #666;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 500;
        }

        .social-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .register-link {
            text-align: center;
            margin-top: 30px;
            color: #666;
        }

        .register-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
        }

        .register-link a:hover {
            text-decoration: underline;
        }

        .welcome-content h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .welcome-content .subtitle {
            font-size: 1.5rem;
            font-weight: 300;
            margin-bottom: 30px;
            opacity: 0.9;
        }

        .features-list {
            list-style: none;
            text-align: left;
            margin: 30px 0;
        }

        .features-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 15px;
            font-size: 1rem;
        }

        .features-list i {
            color: var(--primary);
            font-size: 1.2rem;
            width: 25px;
        }

        .tech-icons {
            display: flex;
            gap: 20px;
            margin-top: 40px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .tech-icon {
            font-size: 2rem;
            opacity: 0.8;
            transition: opacity 0.3s ease;
        }

        .tech-icon:hover {
            opacity: 1;
        }

        /* Loading overlay */
        #overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        .alert {
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 20px;
            font-weight: 500;
        }

        .alert-danger {
            background: #fee;
            border: 1px solid #f5c6cb;
            color: #721c24;
        }

        .alert-success {
            background: #e8f5e8;
            border: 1px solid #c3e6cb;
            color: #155724;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .login-container {
                flex-direction: column;
                max-width: 400px;
            }

            .login-right {
                order: -1;
                padding: 40px 20px;
            }

            .login-left {
                padding: 40px 20px;
            }

            .tech-icons {
                gap: 15px;
            }

            .tech-icon {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            body {
                padding: 10px;
            }

            .login-container {
                border-radius: 15px;
            }

            .social-login {
                flex-direction: column;
            }

            .welcome-content h1 {
                font-size: 2rem;
            }

            .welcome-content .subtitle {
                font-size: 1.2rem;
            }
        }